diff options
Diffstat (limited to 'linux-user/elfload.c')
| -rw-r--r-- | linux-user/elfload.c | 4138 |
1 files changed, 4138 insertions, 0 deletions
diff --git a/linux-user/elfload.c b/linux-user/elfload.c new file mode 100644 index 000000000..767f54c76 --- /dev/null +++ b/linux-user/elfload.c @@ -0,0 +1,4138 @@ +/* This is the Linux kernel elf-loading code, ported into user space */ +#include "qemu/osdep.h" +#include <sys/param.h> + +#include <sys/resource.h> +#include <sys/shm.h> + +#include "qemu.h" +#include "user-internals.h" +#include "signal-common.h" +#include "loader.h" +#include "user-mmap.h" +#include "disas/disas.h" +#include "qemu/bitops.h" +#include "qemu/path.h" +#include "qemu/queue.h" +#include "qemu/guest-random.h" +#include "qemu/units.h" +#include "qemu/selfmap.h" +#include "qapi/error.h" +#include "target_signal.h" + +#ifdef _ARCH_PPC64 +#undef ARCH_DLINFO +#undef ELF_PLATFORM +#undef ELF_HWCAP +#undef ELF_HWCAP2 +#undef ELF_CLASS +#undef ELF_DATA +#undef ELF_ARCH +#endif + +#define ELF_OSABI ELFOSABI_SYSV + +/* from personality.h */ + +/* + * Flags for bug emulation. + * + * These occupy the top three bytes. + */ +enum { + ADDR_NO_RANDOMIZE = 0x0040000, /* disable randomization of VA space */ + FDPIC_FUNCPTRS = 0x0080000, /* userspace function ptrs point to + descriptors (signal handling) */ + MMAP_PAGE_ZERO = 0x0100000, + ADDR_COMPAT_LAYOUT = 0x0200000, + READ_IMPLIES_EXEC = 0x0400000, + ADDR_LIMIT_32BIT = 0x0800000, + SHORT_INODE = 0x1000000, + WHOLE_SECONDS = 0x2000000, + STICKY_TIMEOUTS = 0x4000000, + ADDR_LIMIT_3GB = 0x8000000, +}; + +/* + * Personality types. + * + * These go in the low byte. Avoid using the top bit, it will + * conflict with error returns. + */ +enum { + PER_LINUX = 0x0000, + PER_LINUX_32BIT = 0x0000 | ADDR_LIMIT_32BIT, + PER_LINUX_FDPIC = 0x0000 | FDPIC_FUNCPTRS, + PER_SVR4 = 0x0001 | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, + PER_SVR3 = 0x0002 | STICKY_TIMEOUTS | SHORT_INODE, + PER_SCOSVR3 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS | SHORT_INODE, + PER_OSR5 = 0x0003 | STICKY_TIMEOUTS | WHOLE_SECONDS, + PER_WYSEV386 = 0x0004 | STICKY_TIMEOUTS | SHORT_INODE, + PER_ISCR4 = 0x0005 | STICKY_TIMEOUTS, + PER_BSD = 0x0006, + PER_SUNOS = 0x0006 | STICKY_TIMEOUTS, + PER_XENIX = 0x0007 | STICKY_TIMEOUTS | SHORT_INODE, + PER_LINUX32 = 0x0008, + PER_LINUX32_3GB = 0x0008 | ADDR_LIMIT_3GB, + PER_IRIX32 = 0x0009 | STICKY_TIMEOUTS,/* IRIX5 32-bit */ + PER_IRIXN32 = 0x000a | STICKY_TIMEOUTS,/* IRIX6 new 32-bit */ + PER_IRIX64 = 0x000b | STICKY_TIMEOUTS,/* IRIX6 64-bit */ + PER_RISCOS = 0x000c, + PER_SOLARIS = 0x000d | STICKY_TIMEOUTS, + PER_UW7 = 0x000e | STICKY_TIMEOUTS | MMAP_PAGE_ZERO, + PER_OSF4 = 0x000f, /* OSF/1 v4 */ + PER_HPUX = 0x0010, + PER_MASK = 0x00ff, +}; + +/* + * Return the base personality without flags. + */ +#define personality(pers) (pers & PER_MASK) + +int info_is_fdpic(struct image_info *info) +{ + return info->personality == PER_LINUX_FDPIC; +} + +/* this flag is uneffective under linux too, should be deleted */ +#ifndef MAP_DENYWRITE +#define MAP_DENYWRITE 0 +#endif + +/* should probably go in elf.h */ +#ifndef ELIBBAD +#define ELIBBAD 80 +#endif + +#ifdef TARGET_WORDS_BIGENDIAN +#define ELF_DATA ELFDATA2MSB +#else +#define ELF_DATA ELFDATA2LSB +#endif + +#ifdef TARGET_ABI_MIPSN32 +typedef abi_ullong target_elf_greg_t; +#define tswapreg(ptr) tswap64(ptr) +#else +typedef abi_ulong target_elf_greg_t; +#define tswapreg(ptr) tswapal(ptr) +#endif + +#ifdef USE_UID16 +typedef abi_ushort target_uid_t; +typedef abi_ushort target_gid_t; +#else +typedef abi_uint target_uid_t; +typedef abi_uint target_gid_t; +#endif +typedef abi_int target_pid_t; + +#ifdef TARGET_I386 + +#define ELF_PLATFORM get_elf_platform() + +static const char *get_elf_platform(void) +{ + static char elf_platform[] = "i386"; + int family = object_property_get_int(OBJECT(thread_cpu), "family", NULL); + if (family > 6) + family = 6; + if (family >= 3) + elf_platform[1] = '0' + family; + return elf_platform; +} + +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ + X86CPU *cpu = X86_CPU(thread_cpu); + + return cpu->env.features[FEAT_1_EDX]; +} + +#ifdef TARGET_X86_64 +#define ELF_START_MMAP 0x2aaaaab000ULL + +#define ELF_CLASS ELFCLASS64 +#define ELF_ARCH EM_X86_64 + +static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) +{ + regs->rax = 0; + regs->rsp = infop->start_stack; + regs->rip = infop->entry; +} + +#define ELF_NREG 27 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* + * Note that ELF_NREG should be 29 as there should be place for + * TRAPNO and ERR "registers" as well but linux doesn't dump + * those. + * + * See linux kernel: arch/x86/include/asm/elf.h + */ +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env) +{ + (*regs)[0] = tswapreg(env->regs[15]); + (*regs)[1] = tswapreg(env->regs[14]); + (*regs)[2] = tswapreg(env->regs[13]); + (*regs)[3] = tswapreg(env->regs[12]); + (*regs)[4] = tswapreg(env->regs[R_EBP]); + (*regs)[5] = tswapreg(env->regs[R_EBX]); + (*regs)[6] = tswapreg(env->regs[11]); + (*regs)[7] = tswapreg(env->regs[10]); + (*regs)[8] = tswapreg(env->regs[9]); + (*regs)[9] = tswapreg(env->regs[8]); + (*regs)[10] = tswapreg(env->regs[R_EAX]); + (*regs)[11] = tswapreg(env->regs[R_ECX]); + (*regs)[12] = tswapreg(env->regs[R_EDX]); + (*regs)[13] = tswapreg(env->regs[R_ESI]); + (*regs)[14] = tswapreg(env->regs[R_EDI]); + (*regs)[15] = tswapreg(env->regs[R_EAX]); /* XXX */ + (*regs)[16] = tswapreg(env->eip); + (*regs)[17] = tswapreg(env->segs[R_CS].selector & 0xffff); + (*regs)[18] = tswapreg(env->eflags); + (*regs)[19] = tswapreg(env->regs[R_ESP]); + (*regs)[20] = tswapreg(env->segs[R_SS].selector & 0xffff); + (*regs)[21] = tswapreg(env->segs[R_FS].selector & 0xffff); + (*regs)[22] = tswapreg(env->segs[R_GS].selector & 0xffff); + (*regs)[23] = tswapreg(env->segs[R_DS].selector & 0xffff); + (*regs)[24] = tswapreg(env->segs[R_ES].selector & 0xffff); + (*regs)[25] = tswapreg(env->segs[R_FS].selector & 0xffff); + (*regs)[26] = tswapreg(env->segs[R_GS].selector & 0xffff); +} + +#else + +#define ELF_START_MMAP 0x80000000 + +/* + * This is used to ensure we don't load something for the wrong architecture. + */ +#define elf_check_arch(x) ( ((x) == EM_386) || ((x) == EM_486) ) + +/* + * These are used to set parameters in the core dumps. + */ +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_386 + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->esp = infop->start_stack; + regs->eip = infop->entry; + + /* SVR4/i386 ABI (pages 3-31, 3-32) says that when the program + starts %edx contains a pointer to a function which might be + registered using `atexit'. This provides a mean for the + dynamic linker to call DT_FINI functions for shared libraries + that have been loaded before the code runs. + + A value of 0 tells we have no such handler. */ + regs->edx = 0; +} + +#define ELF_NREG 17 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* + * Note that ELF_NREG should be 19 as there should be place for + * TRAPNO and ERR "registers" as well but linux doesn't dump + * those. + * + * See linux kernel: arch/x86/include/asm/elf.h + */ +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUX86State *env) +{ + (*regs)[0] = tswapreg(env->regs[R_EBX]); + (*regs)[1] = tswapreg(env->regs[R_ECX]); + (*regs)[2] = tswapreg(env->regs[R_EDX]); + (*regs)[3] = tswapreg(env->regs[R_ESI]); + (*regs)[4] = tswapreg(env->regs[R_EDI]); + (*regs)[5] = tswapreg(env->regs[R_EBP]); + (*regs)[6] = tswapreg(env->regs[R_EAX]); + (*regs)[7] = tswapreg(env->segs[R_DS].selector & 0xffff); + (*regs)[8] = tswapreg(env->segs[R_ES].selector & 0xffff); + (*regs)[9] = tswapreg(env->segs[R_FS].selector & 0xffff); + (*regs)[10] = tswapreg(env->segs[R_GS].selector & 0xffff); + (*regs)[11] = tswapreg(env->regs[R_EAX]); /* XXX */ + (*regs)[12] = tswapreg(env->eip); + (*regs)[13] = tswapreg(env->segs[R_CS].selector & 0xffff); + (*regs)[14] = tswapreg(env->eflags); + (*regs)[15] = tswapreg(env->regs[R_ESP]); + (*regs)[16] = tswapreg(env->segs[R_SS].selector & 0xffff); +} +#endif + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +#endif + +#ifdef TARGET_ARM + +#ifndef TARGET_AARCH64 +/* 32 bit ARM definitions */ + +#define ELF_START_MMAP 0x80000000 + +#define ELF_ARCH EM_ARM +#define ELF_CLASS ELFCLASS32 + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + abi_long stack = infop->start_stack; + memset(regs, 0, sizeof(*regs)); + + regs->uregs[16] = ARM_CPU_MODE_USR; + if (infop->entry & 1) { + regs->uregs[16] |= CPSR_T; + } + regs->uregs[15] = infop->entry & 0xfffffffe; + regs->uregs[13] = infop->start_stack; + /* FIXME - what to for failure of get_user()? */ + get_user_ual(regs->uregs[2], stack + 8); /* envp */ + get_user_ual(regs->uregs[1], stack + 4); /* envp */ + /* XXX: it seems that r0 is zeroed after ! */ + regs->uregs[0] = 0; + /* For uClinux PIC binaries. */ + /* XXX: Linux does this only on ARM with no MMU (do we care ?) */ + regs->uregs[10] = infop->start_data; + + /* Support ARM FDPIC. */ + if (info_is_fdpic(infop)) { + /* As described in the ABI document, r7 points to the loadmap info + * prepared by the kernel. If an interpreter is needed, r8 points + * to the interpreter loadmap and r9 points to the interpreter + * PT_DYNAMIC info. If no interpreter is needed, r8 is zero, and + * r9 points to the main program PT_DYNAMIC info. + */ + regs->uregs[7] = infop->loadmap_addr; + if (infop->interpreter_loadmap_addr) { + /* Executable is dynamically loaded. */ + regs->uregs[8] = infop->interpreter_loadmap_addr; + regs->uregs[9] = infop->interpreter_pt_dynamic_addr; + } else { + regs->uregs[8] = 0; + regs->uregs[9] = infop->pt_dynamic_addr; + } + } +} + +#define ELF_NREG 18 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUARMState *env) +{ + (*regs)[0] = tswapreg(env->regs[0]); + (*regs)[1] = tswapreg(env->regs[1]); + (*regs)[2] = tswapreg(env->regs[2]); + (*regs)[3] = tswapreg(env->regs[3]); + (*regs)[4] = tswapreg(env->regs[4]); + (*regs)[5] = tswapreg(env->regs[5]); + (*regs)[6] = tswapreg(env->regs[6]); + (*regs)[7] = tswapreg(env->regs[7]); + (*regs)[8] = tswapreg(env->regs[8]); + (*regs)[9] = tswapreg(env->regs[9]); + (*regs)[10] = tswapreg(env->regs[10]); + (*regs)[11] = tswapreg(env->regs[11]); + (*regs)[12] = tswapreg(env->regs[12]); + (*regs)[13] = tswapreg(env->regs[13]); + (*regs)[14] = tswapreg(env->regs[14]); + (*regs)[15] = tswapreg(env->regs[15]); + + (*regs)[16] = tswapreg(cpsr_read((CPUARMState *)env)); + (*regs)[17] = tswapreg(env->regs[0]); /* XXX */ +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +enum +{ + ARM_HWCAP_ARM_SWP = 1 << 0, + ARM_HWCAP_ARM_HALF = 1 << 1, + ARM_HWCAP_ARM_THUMB = 1 << 2, + ARM_HWCAP_ARM_26BIT = 1 << 3, + ARM_HWCAP_ARM_FAST_MULT = 1 << 4, + ARM_HWCAP_ARM_FPA = 1 << 5, + ARM_HWCAP_ARM_VFP = 1 << 6, + ARM_HWCAP_ARM_EDSP = 1 << 7, + ARM_HWCAP_ARM_JAVA = 1 << 8, + ARM_HWCAP_ARM_IWMMXT = 1 << 9, + ARM_HWCAP_ARM_CRUNCH = 1 << 10, + ARM_HWCAP_ARM_THUMBEE = 1 << 11, + ARM_HWCAP_ARM_NEON = 1 << 12, + ARM_HWCAP_ARM_VFPv3 = 1 << 13, + ARM_HWCAP_ARM_VFPv3D16 = 1 << 14, + ARM_HWCAP_ARM_TLS = 1 << 15, + ARM_HWCAP_ARM_VFPv4 = 1 << 16, + ARM_HWCAP_ARM_IDIVA = 1 << 17, + ARM_HWCAP_ARM_IDIVT = 1 << 18, + ARM_HWCAP_ARM_VFPD32 = 1 << 19, + ARM_HWCAP_ARM_LPAE = 1 << 20, + ARM_HWCAP_ARM_EVTSTRM = 1 << 21, +}; + +enum { + ARM_HWCAP2_ARM_AES = 1 << 0, + ARM_HWCAP2_ARM_PMULL = 1 << 1, + ARM_HWCAP2_ARM_SHA1 = 1 << 2, + ARM_HWCAP2_ARM_SHA2 = 1 << 3, + ARM_HWCAP2_ARM_CRC32 = 1 << 4, +}; + +/* The commpage only exists for 32 bit kernels */ + +#define ARM_COMMPAGE (intptr_t)0xffff0f00u + +static bool init_guest_commpage(void) +{ + void *want = g2h_untagged(ARM_COMMPAGE & -qemu_host_page_size); + void *addr = mmap(want, qemu_host_page_size, PROT_READ | PROT_WRITE, + MAP_ANONYMOUS | MAP_PRIVATE | MAP_FIXED, -1, 0); + + if (addr == MAP_FAILED) { + perror("Allocating guest commpage"); + exit(EXIT_FAILURE); + } + if (addr != want) { + return false; + } + + /* Set kernel helper versions; rest of page is 0. */ + __put_user(5, (uint32_t *)g2h_untagged(0xffff0ffcu)); + + if (mprotect(addr, qemu_host_page_size, PROT_READ)) { + perror("Protecting guest commpage"); + exit(EXIT_FAILURE); + } + return true; +} + +#define ELF_HWCAP get_elf_hwcap() +#define ELF_HWCAP2 get_elf_hwcap2() + +static uint32_t get_elf_hwcap(void) +{ + ARMCPU *cpu = ARM_CPU(thread_cpu); + uint32_t hwcaps = 0; + + hwcaps |= ARM_HWCAP_ARM_SWP; + hwcaps |= ARM_HWCAP_ARM_HALF; + hwcaps |= ARM_HWCAP_ARM_THUMB; + hwcaps |= ARM_HWCAP_ARM_FAST_MULT; + + /* probe for the extra features */ +#define GET_FEATURE(feat, hwcap) \ + do { if (arm_feature(&cpu->env, feat)) { hwcaps |= hwcap; } } while (0) + +#define GET_FEATURE_ID(feat, hwcap) \ + do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0) + + /* EDSP is in v5TE and above, but all our v5 CPUs are v5TE */ + GET_FEATURE(ARM_FEATURE_V5, ARM_HWCAP_ARM_EDSP); + GET_FEATURE(ARM_FEATURE_IWMMXT, ARM_HWCAP_ARM_IWMMXT); + GET_FEATURE(ARM_FEATURE_THUMB2EE, ARM_HWCAP_ARM_THUMBEE); + GET_FEATURE(ARM_FEATURE_NEON, ARM_HWCAP_ARM_NEON); + GET_FEATURE(ARM_FEATURE_V6K, ARM_HWCAP_ARM_TLS); + GET_FEATURE(ARM_FEATURE_LPAE, ARM_HWCAP_ARM_LPAE); + GET_FEATURE_ID(aa32_arm_div, ARM_HWCAP_ARM_IDIVA); + GET_FEATURE_ID(aa32_thumb_div, ARM_HWCAP_ARM_IDIVT); + GET_FEATURE_ID(aa32_vfp, ARM_HWCAP_ARM_VFP); + + if (cpu_isar_feature(aa32_fpsp_v3, cpu) || + cpu_isar_feature(aa32_fpdp_v3, cpu)) { + hwcaps |= ARM_HWCAP_ARM_VFPv3; + if (cpu_isar_feature(aa32_simd_r32, cpu)) { + hwcaps |= ARM_HWCAP_ARM_VFPD32; + } else { + hwcaps |= ARM_HWCAP_ARM_VFPv3D16; + } + } + GET_FEATURE_ID(aa32_simdfmac, ARM_HWCAP_ARM_VFPv4); + + return hwcaps; +} + +static uint32_t get_elf_hwcap2(void) +{ + ARMCPU *cpu = ARM_CPU(thread_cpu); + uint32_t hwcaps = 0; + + GET_FEATURE_ID(aa32_aes, ARM_HWCAP2_ARM_AES); + GET_FEATURE_ID(aa32_pmull, ARM_HWCAP2_ARM_PMULL); + GET_FEATURE_ID(aa32_sha1, ARM_HWCAP2_ARM_SHA1); + GET_FEATURE_ID(aa32_sha2, ARM_HWCAP2_ARM_SHA2); + GET_FEATURE_ID(aa32_crc32, ARM_HWCAP2_ARM_CRC32); + return hwcaps; +} + +#undef GET_FEATURE +#undef GET_FEATURE_ID + +#define ELF_PLATFORM get_elf_platform() + +static const char *get_elf_platform(void) +{ + CPUARMState *env = thread_cpu->env_ptr; + +#ifdef TARGET_WORDS_BIGENDIAN +# define END "b" +#else +# define END "l" +#endif + + if (arm_feature(env, ARM_FEATURE_V8)) { + return "v8" END; + } else if (arm_feature(env, ARM_FEATURE_V7)) { + if (arm_feature(env, ARM_FEATURE_M)) { + return "v7m" END; + } else { + return "v7" END; + } + } else if (arm_feature(env, ARM_FEATURE_V6)) { + return "v6" END; + } else if (arm_feature(env, ARM_FEATURE_V5)) { + return "v5" END; + } else { + return "v4" END; + } + +#undef END +} + +#else +/* 64 bit ARM definitions */ +#define ELF_START_MMAP 0x80000000 + +#define ELF_ARCH EM_AARCH64 +#define ELF_CLASS ELFCLASS64 +#ifdef TARGET_WORDS_BIGENDIAN +# define ELF_PLATFORM "aarch64_be" +#else +# define ELF_PLATFORM "aarch64" +#endif + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + abi_long stack = infop->start_stack; + memset(regs, 0, sizeof(*regs)); + + regs->pc = infop->entry & ~0x3ULL; + regs->sp = stack; +} + +#define ELF_NREG 34 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUARMState *env) +{ + int i; + + for (i = 0; i < 32; i++) { + (*regs)[i] = tswapreg(env->xregs[i]); + } + (*regs)[32] = tswapreg(env->pc); + (*regs)[33] = tswapreg(pstate_read((CPUARMState *)env)); +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +enum { + ARM_HWCAP_A64_FP = 1 << 0, + ARM_HWCAP_A64_ASIMD = 1 << 1, + ARM_HWCAP_A64_EVTSTRM = 1 << 2, + ARM_HWCAP_A64_AES = 1 << 3, + ARM_HWCAP_A64_PMULL = 1 << 4, + ARM_HWCAP_A64_SHA1 = 1 << 5, + ARM_HWCAP_A64_SHA2 = 1 << 6, + ARM_HWCAP_A64_CRC32 = 1 << 7, + ARM_HWCAP_A64_ATOMICS = 1 << 8, + ARM_HWCAP_A64_FPHP = 1 << 9, + ARM_HWCAP_A64_ASIMDHP = 1 << 10, + ARM_HWCAP_A64_CPUID = 1 << 11, + ARM_HWCAP_A64_ASIMDRDM = 1 << 12, + ARM_HWCAP_A64_JSCVT = 1 << 13, + ARM_HWCAP_A64_FCMA = 1 << 14, + ARM_HWCAP_A64_LRCPC = 1 << 15, + ARM_HWCAP_A64_DCPOP = 1 << 16, + ARM_HWCAP_A64_SHA3 = 1 << 17, + ARM_HWCAP_A64_SM3 = 1 << 18, + ARM_HWCAP_A64_SM4 = 1 << 19, + ARM_HWCAP_A64_ASIMDDP = 1 << 20, + ARM_HWCAP_A64_SHA512 = 1 << 21, + ARM_HWCAP_A64_SVE = 1 << 22, + ARM_HWCAP_A64_ASIMDFHM = 1 << 23, + ARM_HWCAP_A64_DIT = 1 << 24, + ARM_HWCAP_A64_USCAT = 1 << 25, + ARM_HWCAP_A64_ILRCPC = 1 << 26, + ARM_HWCAP_A64_FLAGM = 1 << 27, + ARM_HWCAP_A64_SSBS = 1 << 28, + ARM_HWCAP_A64_SB = 1 << 29, + ARM_HWCAP_A64_PACA = 1 << 30, + ARM_HWCAP_A64_PACG = 1UL << 31, + + ARM_HWCAP2_A64_DCPODP = 1 << 0, + ARM_HWCAP2_A64_SVE2 = 1 << 1, + ARM_HWCAP2_A64_SVEAES = 1 << 2, + ARM_HWCAP2_A64_SVEPMULL = 1 << 3, + ARM_HWCAP2_A64_SVEBITPERM = 1 << 4, + ARM_HWCAP2_A64_SVESHA3 = 1 << 5, + ARM_HWCAP2_A64_SVESM4 = 1 << 6, + ARM_HWCAP2_A64_FLAGM2 = 1 << 7, + ARM_HWCAP2_A64_FRINT = 1 << 8, + ARM_HWCAP2_A64_SVEI8MM = 1 << 9, + ARM_HWCAP2_A64_SVEF32MM = 1 << 10, + ARM_HWCAP2_A64_SVEF64MM = 1 << 11, + ARM_HWCAP2_A64_SVEBF16 = 1 << 12, + ARM_HWCAP2_A64_I8MM = 1 << 13, + ARM_HWCAP2_A64_BF16 = 1 << 14, + ARM_HWCAP2_A64_DGH = 1 << 15, + ARM_HWCAP2_A64_RNG = 1 << 16, + ARM_HWCAP2_A64_BTI = 1 << 17, + ARM_HWCAP2_A64_MTE = 1 << 18, +}; + +#define ELF_HWCAP get_elf_hwcap() +#define ELF_HWCAP2 get_elf_hwcap2() + +#define GET_FEATURE_ID(feat, hwcap) \ + do { if (cpu_isar_feature(feat, cpu)) { hwcaps |= hwcap; } } while (0) + +static uint32_t get_elf_hwcap(void) +{ + ARMCPU *cpu = ARM_CPU(thread_cpu); + uint32_t hwcaps = 0; + + hwcaps |= ARM_HWCAP_A64_FP; + hwcaps |= ARM_HWCAP_A64_ASIMD; + hwcaps |= ARM_HWCAP_A64_CPUID; + + /* probe for the extra features */ + + GET_FEATURE_ID(aa64_aes, ARM_HWCAP_A64_AES); + GET_FEATURE_ID(aa64_pmull, ARM_HWCAP_A64_PMULL); + GET_FEATURE_ID(aa64_sha1, ARM_HWCAP_A64_SHA1); + GET_FEATURE_ID(aa64_sha256, ARM_HWCAP_A64_SHA2); + GET_FEATURE_ID(aa64_sha512, ARM_HWCAP_A64_SHA512); + GET_FEATURE_ID(aa64_crc32, ARM_HWCAP_A64_CRC32); + GET_FEATURE_ID(aa64_sha3, ARM_HWCAP_A64_SHA3); + GET_FEATURE_ID(aa64_sm3, ARM_HWCAP_A64_SM3); + GET_FEATURE_ID(aa64_sm4, ARM_HWCAP_A64_SM4); + GET_FEATURE_ID(aa64_fp16, ARM_HWCAP_A64_FPHP | ARM_HWCAP_A64_ASIMDHP); + GET_FEATURE_ID(aa64_atomics, ARM_HWCAP_A64_ATOMICS); + GET_FEATURE_ID(aa64_rdm, ARM_HWCAP_A64_ASIMDRDM); + GET_FEATURE_ID(aa64_dp, ARM_HWCAP_A64_ASIMDDP); + GET_FEATURE_ID(aa64_fcma, ARM_HWCAP_A64_FCMA); + GET_FEATURE_ID(aa64_sve, ARM_HWCAP_A64_SVE); + GET_FEATURE_ID(aa64_pauth, ARM_HWCAP_A64_PACA | ARM_HWCAP_A64_PACG); + GET_FEATURE_ID(aa64_fhm, ARM_HWCAP_A64_ASIMDFHM); + GET_FEATURE_ID(aa64_jscvt, ARM_HWCAP_A64_JSCVT); + GET_FEATURE_ID(aa64_sb, ARM_HWCAP_A64_SB); + GET_FEATURE_ID(aa64_condm_4, ARM_HWCAP_A64_FLAGM); + GET_FEATURE_ID(aa64_dcpop, ARM_HWCAP_A64_DCPOP); + GET_FEATURE_ID(aa64_rcpc_8_3, ARM_HWCAP_A64_LRCPC); + GET_FEATURE_ID(aa64_rcpc_8_4, ARM_HWCAP_A64_ILRCPC); + + return hwcaps; +} + +static uint32_t get_elf_hwcap2(void) +{ + ARMCPU *cpu = ARM_CPU(thread_cpu); + uint32_t hwcaps = 0; + + GET_FEATURE_ID(aa64_dcpodp, ARM_HWCAP2_A64_DCPODP); + GET_FEATURE_ID(aa64_sve2, ARM_HWCAP2_A64_SVE2); + GET_FEATURE_ID(aa64_sve2_aes, ARM_HWCAP2_A64_SVEAES); + GET_FEATURE_ID(aa64_sve2_pmull128, ARM_HWCAP2_A64_SVEPMULL); + GET_FEATURE_ID(aa64_sve2_bitperm, ARM_HWCAP2_A64_SVEBITPERM); + GET_FEATURE_ID(aa64_sve2_sha3, ARM_HWCAP2_A64_SVESHA3); + GET_FEATURE_ID(aa64_sve2_sm4, ARM_HWCAP2_A64_SVESM4); + GET_FEATURE_ID(aa64_condm_5, ARM_HWCAP2_A64_FLAGM2); + GET_FEATURE_ID(aa64_frint, ARM_HWCAP2_A64_FRINT); + GET_FEATURE_ID(aa64_sve_i8mm, ARM_HWCAP2_A64_SVEI8MM); + GET_FEATURE_ID(aa64_sve_f32mm, ARM_HWCAP2_A64_SVEF32MM); + GET_FEATURE_ID(aa64_sve_f64mm, ARM_HWCAP2_A64_SVEF64MM); + GET_FEATURE_ID(aa64_sve_bf16, ARM_HWCAP2_A64_SVEBF16); + GET_FEATURE_ID(aa64_i8mm, ARM_HWCAP2_A64_I8MM); + GET_FEATURE_ID(aa64_bf16, ARM_HWCAP2_A64_BF16); + GET_FEATURE_ID(aa64_rndr, ARM_HWCAP2_A64_RNG); + GET_FEATURE_ID(aa64_bti, ARM_HWCAP2_A64_BTI); + GET_FEATURE_ID(aa64_mte, ARM_HWCAP2_A64_MTE); + + return hwcaps; +} + +#undef GET_FEATURE_ID + +#endif /* not TARGET_AARCH64 */ +#endif /* TARGET_ARM */ + +#ifdef TARGET_SPARC +#ifdef TARGET_SPARC64 + +#define ELF_START_MMAP 0x80000000 +#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \ + | HWCAP_SPARC_MULDIV | HWCAP_SPARC_V9) +#ifndef TARGET_ABI32 +#define elf_check_arch(x) ( (x) == EM_SPARCV9 || (x) == EM_SPARC32PLUS ) +#else +#define elf_check_arch(x) ( (x) == EM_SPARC32PLUS || (x) == EM_SPARC ) +#endif + +#define ELF_CLASS ELFCLASS64 +#define ELF_ARCH EM_SPARCV9 +#else +#define ELF_START_MMAP 0x80000000 +#define ELF_HWCAP (HWCAP_SPARC_FLUSH | HWCAP_SPARC_STBAR | HWCAP_SPARC_SWAP \ + | HWCAP_SPARC_MULDIV) +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_SPARC +#endif /* TARGET_SPARC64 */ + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + /* Note that target_cpu_copy_regs does not read psr/tstate. */ + regs->pc = infop->entry; + regs->npc = regs->pc + 4; + regs->y = 0; + regs->u_regs[14] = (infop->start_stack - 16 * sizeof(abi_ulong) + - TARGET_STACK_BIAS); +} +#endif /* TARGET_SPARC */ + +#ifdef TARGET_PPC + +#define ELF_MACHINE PPC_ELF_MACHINE +#define ELF_START_MMAP 0x80000000 + +#if defined(TARGET_PPC64) && !defined(TARGET_ABI32) + +#define elf_check_arch(x) ( (x) == EM_PPC64 ) + +#define ELF_CLASS ELFCLASS64 + +#else + +#define ELF_CLASS ELFCLASS32 + +#endif + +#define ELF_ARCH EM_PPC + +/* Feature masks for the Aux Vector Hardware Capabilities (AT_HWCAP). + See arch/powerpc/include/asm/cputable.h. */ +enum { + QEMU_PPC_FEATURE_32 = 0x80000000, + QEMU_PPC_FEATURE_64 = 0x40000000, + QEMU_PPC_FEATURE_601_INSTR = 0x20000000, + QEMU_PPC_FEATURE_HAS_ALTIVEC = 0x10000000, + QEMU_PPC_FEATURE_HAS_FPU = 0x08000000, + QEMU_PPC_FEATURE_HAS_MMU = 0x04000000, + QEMU_PPC_FEATURE_HAS_4xxMAC = 0x02000000, + QEMU_PPC_FEATURE_UNIFIED_CACHE = 0x01000000, + QEMU_PPC_FEATURE_HAS_SPE = 0x00800000, + QEMU_PPC_FEATURE_HAS_EFP_SINGLE = 0x00400000, + QEMU_PPC_FEATURE_HAS_EFP_DOUBLE = 0x00200000, + QEMU_PPC_FEATURE_NO_TB = 0x00100000, + QEMU_PPC_FEATURE_POWER4 = 0x00080000, + QEMU_PPC_FEATURE_POWER5 = 0x00040000, + QEMU_PPC_FEATURE_POWER5_PLUS = 0x00020000, + QEMU_PPC_FEATURE_CELL = 0x00010000, + QEMU_PPC_FEATURE_BOOKE = 0x00008000, + QEMU_PPC_FEATURE_SMT = 0x00004000, + QEMU_PPC_FEATURE_ICACHE_SNOOP = 0x00002000, + QEMU_PPC_FEATURE_ARCH_2_05 = 0x00001000, + QEMU_PPC_FEATURE_PA6T = 0x00000800, + QEMU_PPC_FEATURE_HAS_DFP = 0x00000400, + QEMU_PPC_FEATURE_POWER6_EXT = 0x00000200, + QEMU_PPC_FEATURE_ARCH_2_06 = 0x00000100, + QEMU_PPC_FEATURE_HAS_VSX = 0x00000080, + QEMU_PPC_FEATURE_PSERIES_PERFMON_COMPAT = 0x00000040, + + QEMU_PPC_FEATURE_TRUE_LE = 0x00000002, + QEMU_PPC_FEATURE_PPC_LE = 0x00000001, + + /* Feature definitions in AT_HWCAP2. */ + QEMU_PPC_FEATURE2_ARCH_2_07 = 0x80000000, /* ISA 2.07 */ + QEMU_PPC_FEATURE2_HAS_HTM = 0x40000000, /* Hardware Transactional Memory */ + QEMU_PPC_FEATURE2_HAS_DSCR = 0x20000000, /* Data Stream Control Register */ + QEMU_PPC_FEATURE2_HAS_EBB = 0x10000000, /* Event Base Branching */ + QEMU_PPC_FEATURE2_HAS_ISEL = 0x08000000, /* Integer Select */ + QEMU_PPC_FEATURE2_HAS_TAR = 0x04000000, /* Target Address Register */ + QEMU_PPC_FEATURE2_VEC_CRYPTO = 0x02000000, + QEMU_PPC_FEATURE2_HTM_NOSC = 0x01000000, + QEMU_PPC_FEATURE2_ARCH_3_00 = 0x00800000, /* ISA 3.00 */ + QEMU_PPC_FEATURE2_HAS_IEEE128 = 0x00400000, /* VSX IEEE Bin Float 128-bit */ + QEMU_PPC_FEATURE2_DARN = 0x00200000, /* darn random number insn */ + QEMU_PPC_FEATURE2_SCV = 0x00100000, /* scv syscall */ + QEMU_PPC_FEATURE2_HTM_NO_SUSPEND = 0x00080000, /* TM w/o suspended state */ +}; + +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ + PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); + uint32_t features = 0; + + /* We don't have to be terribly complete here; the high points are + Altivec/FP/SPE support. Anything else is just a bonus. */ +#define GET_FEATURE(flag, feature) \ + do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0) +#define GET_FEATURE2(flags, feature) \ + do { \ + if ((cpu->env.insns_flags2 & flags) == flags) { \ + features |= feature; \ + } \ + } while (0) + GET_FEATURE(PPC_64B, QEMU_PPC_FEATURE_64); + GET_FEATURE(PPC_FLOAT, QEMU_PPC_FEATURE_HAS_FPU); + GET_FEATURE(PPC_ALTIVEC, QEMU_PPC_FEATURE_HAS_ALTIVEC); + GET_FEATURE(PPC_SPE, QEMU_PPC_FEATURE_HAS_SPE); + GET_FEATURE(PPC_SPE_SINGLE, QEMU_PPC_FEATURE_HAS_EFP_SINGLE); + GET_FEATURE(PPC_SPE_DOUBLE, QEMU_PPC_FEATURE_HAS_EFP_DOUBLE); + GET_FEATURE(PPC_BOOKE, QEMU_PPC_FEATURE_BOOKE); + GET_FEATURE(PPC_405_MAC, QEMU_PPC_FEATURE_HAS_4xxMAC); + GET_FEATURE2(PPC2_DFP, QEMU_PPC_FEATURE_HAS_DFP); + GET_FEATURE2(PPC2_VSX, QEMU_PPC_FEATURE_HAS_VSX); + GET_FEATURE2((PPC2_PERM_ISA206 | PPC2_DIVE_ISA206 | PPC2_ATOMIC_ISA206 | + PPC2_FP_CVT_ISA206 | PPC2_FP_TST_ISA206), + QEMU_PPC_FEATURE_ARCH_2_06); +#undef GET_FEATURE +#undef GET_FEATURE2 + + return features; +} + +#define ELF_HWCAP2 get_elf_hwcap2() + +static uint32_t get_elf_hwcap2(void) +{ + PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); + uint32_t features = 0; + +#define GET_FEATURE(flag, feature) \ + do { if (cpu->env.insns_flags & flag) { features |= feature; } } while (0) +#define GET_FEATURE2(flag, feature) \ + do { if (cpu->env.insns_flags2 & flag) { features |= feature; } } while (0) + + GET_FEATURE(PPC_ISEL, QEMU_PPC_FEATURE2_HAS_ISEL); + GET_FEATURE2(PPC2_BCTAR_ISA207, QEMU_PPC_FEATURE2_HAS_TAR); + GET_FEATURE2((PPC2_BCTAR_ISA207 | PPC2_LSQ_ISA207 | PPC2_ALTIVEC_207 | + PPC2_ISA207S), QEMU_PPC_FEATURE2_ARCH_2_07 | + QEMU_PPC_FEATURE2_VEC_CRYPTO); + GET_FEATURE2(PPC2_ISA300, QEMU_PPC_FEATURE2_ARCH_3_00 | + QEMU_PPC_FEATURE2_DARN | QEMU_PPC_FEATURE2_HAS_IEEE128); + +#undef GET_FEATURE +#undef GET_FEATURE2 + + return features; +} + +/* + * The requirements here are: + * - keep the final alignment of sp (sp & 0xf) + * - make sure the 32-bit value at the first 16 byte aligned position of + * AUXV is greater than 16 for glibc compatibility. + * AT_IGNOREPPC is used for that. + * - for compatibility with glibc ARCH_DLINFO must always be defined on PPC, + * even if DLINFO_ARCH_ITEMS goes to zero or is undefined. + */ +#define DLINFO_ARCH_ITEMS 5 +#define ARCH_DLINFO \ + do { \ + PowerPCCPU *cpu = POWERPC_CPU(thread_cpu); \ + /* \ + * Handle glibc compatibility: these magic entries must \ + * be at the lowest addresses in the final auxv. \ + */ \ + NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ + NEW_AUX_ENT(AT_IGNOREPPC, AT_IGNOREPPC); \ + NEW_AUX_ENT(AT_DCACHEBSIZE, cpu->env.dcache_line_size); \ + NEW_AUX_ENT(AT_ICACHEBSIZE, cpu->env.icache_line_size); \ + NEW_AUX_ENT(AT_UCACHEBSIZE, 0); \ + } while (0) + +static inline void init_thread(struct target_pt_regs *_regs, struct image_info *infop) +{ + _regs->gpr[1] = infop->start_stack; +#if defined(TARGET_PPC64) && !defined(TARGET_ABI32) + if (get_ppc64_abi(infop) < 2) { + uint64_t val; + get_user_u64(val, infop->entry + 8); + _regs->gpr[2] = val + infop->load_bias; + get_user_u64(val, infop->entry); + infop->entry = val + infop->load_bias; + } else { + _regs->gpr[12] = infop->entry; /* r12 set to global entry address */ + } +#endif + _regs->nip = infop->entry; +} + +/* See linux kernel: arch/powerpc/include/asm/elf.h. */ +#define ELF_NREG 48 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUPPCState *env) +{ + int i; + target_ulong ccr = 0; + + for (i = 0; i < ARRAY_SIZE(env->gpr); i++) { + (*regs)[i] = tswapreg(env->gpr[i]); + } + + (*regs)[32] = tswapreg(env->nip); + (*regs)[33] = tswapreg(env->msr); + (*regs)[35] = tswapreg(env->ctr); + (*regs)[36] = tswapreg(env->lr); + (*regs)[37] = tswapreg(cpu_read_xer(env)); + + for (i = 0; i < ARRAY_SIZE(env->crf); i++) { + ccr |= env->crf[i] << (32 - ((i + 1) * 4)); + } + (*regs)[38] = tswapreg(ccr); +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +#endif + +#ifdef TARGET_MIPS + +#define ELF_START_MMAP 0x80000000 + +#ifdef TARGET_MIPS64 +#define ELF_CLASS ELFCLASS64 +#else +#define ELF_CLASS ELFCLASS32 +#endif +#define ELF_ARCH EM_MIPS + +#ifdef TARGET_ABI_MIPSN32 +#define elf_check_abi(x) ((x) & EF_MIPS_ABI2) +#else +#define elf_check_abi(x) (!((x) & EF_MIPS_ABI2)) +#endif + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->cp0_status = 2 << CP0St_KSU; + regs->cp0_epc = infop->entry; + regs->regs[29] = infop->start_stack; +} + +/* See linux kernel: arch/mips/include/asm/elf.h. */ +#define ELF_NREG 45 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* See linux kernel: arch/mips/include/asm/reg.h. */ +enum { +#ifdef TARGET_MIPS64 + TARGET_EF_R0 = 0, +#else + TARGET_EF_R0 = 6, +#endif + TARGET_EF_R26 = TARGET_EF_R0 + 26, + TARGET_EF_R27 = TARGET_EF_R0 + 27, + TARGET_EF_LO = TARGET_EF_R0 + 32, + TARGET_EF_HI = TARGET_EF_R0 + 33, + TARGET_EF_CP0_EPC = TARGET_EF_R0 + 34, + TARGET_EF_CP0_BADVADDR = TARGET_EF_R0 + 35, + TARGET_EF_CP0_STATUS = TARGET_EF_R0 + 36, + TARGET_EF_CP0_CAUSE = TARGET_EF_R0 + 37 +}; + +/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */ +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMIPSState *env) +{ + int i; + + for (i = 0; i < TARGET_EF_R0; i++) { + (*regs)[i] = 0; + } + (*regs)[TARGET_EF_R0] = 0; + + for (i = 1; i < ARRAY_SIZE(env->active_tc.gpr); i++) { + (*regs)[TARGET_EF_R0 + i] = tswapreg(env->active_tc.gpr[i]); + } + + (*regs)[TARGET_EF_R26] = 0; + (*regs)[TARGET_EF_R27] = 0; + (*regs)[TARGET_EF_LO] = tswapreg(env->active_tc.LO[0]); + (*regs)[TARGET_EF_HI] = tswapreg(env->active_tc.HI[0]); + (*regs)[TARGET_EF_CP0_EPC] = tswapreg(env->active_tc.PC); + (*regs)[TARGET_EF_CP0_BADVADDR] = tswapreg(env->CP0_BadVAddr); + (*regs)[TARGET_EF_CP0_STATUS] = tswapreg(env->CP0_Status); + (*regs)[TARGET_EF_CP0_CAUSE] = tswapreg(env->CP0_Cause); +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +/* See arch/mips/include/uapi/asm/hwcap.h. */ +enum { + HWCAP_MIPS_R6 = (1 << 0), + HWCAP_MIPS_MSA = (1 << 1), + HWCAP_MIPS_CRC32 = (1 << 2), + HWCAP_MIPS_MIPS16 = (1 << 3), + HWCAP_MIPS_MDMX = (1 << 4), + HWCAP_MIPS_MIPS3D = (1 << 5), + HWCAP_MIPS_SMARTMIPS = (1 << 6), + HWCAP_MIPS_DSP = (1 << 7), + HWCAP_MIPS_DSP2 = (1 << 8), + HWCAP_MIPS_DSP3 = (1 << 9), + HWCAP_MIPS_MIPS16E2 = (1 << 10), + HWCAP_LOONGSON_MMI = (1 << 11), + HWCAP_LOONGSON_EXT = (1 << 12), + HWCAP_LOONGSON_EXT2 = (1 << 13), + HWCAP_LOONGSON_CPUCFG = (1 << 14), +}; + +#define ELF_HWCAP get_elf_hwcap() + +#define GET_FEATURE_INSN(_flag, _hwcap) \ + do { if (cpu->env.insn_flags & (_flag)) { hwcaps |= _hwcap; } } while (0) + +#define GET_FEATURE_REG_SET(_reg, _mask, _hwcap) \ + do { if (cpu->env._reg & (_mask)) { hwcaps |= _hwcap; } } while (0) + +#define GET_FEATURE_REG_EQU(_reg, _start, _length, _val, _hwcap) \ + do { \ + if (extract32(cpu->env._reg, (_start), (_length)) == (_val)) { \ + hwcaps |= _hwcap; \ + } \ + } while (0) + +static uint32_t get_elf_hwcap(void) +{ + MIPSCPU *cpu = MIPS_CPU(thread_cpu); + uint32_t hwcaps = 0; + + GET_FEATURE_REG_EQU(CP0_Config0, CP0C0_AR, CP0C0_AR_LENGTH, + 2, HWCAP_MIPS_R6); + GET_FEATURE_REG_SET(CP0_Config3, 1 << CP0C3_MSAP, HWCAP_MIPS_MSA); + GET_FEATURE_INSN(ASE_LMMI, HWCAP_LOONGSON_MMI); + GET_FEATURE_INSN(ASE_LEXT, HWCAP_LOONGSON_EXT); + + return hwcaps; +} + +#undef GET_FEATURE_REG_EQU +#undef GET_FEATURE_REG_SET +#undef GET_FEATURE_INSN + +#endif /* TARGET_MIPS */ + +#ifdef TARGET_MICROBLAZE + +#define ELF_START_MMAP 0x80000000 + +#define elf_check_arch(x) ( (x) == EM_MICROBLAZE || (x) == EM_MICROBLAZE_OLD) + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_MICROBLAZE + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->pc = infop->entry; + regs->r1 = infop->start_stack; + +} + +#define ELF_EXEC_PAGESIZE 4096 + +#define USE_ELF_CORE_DUMP +#define ELF_NREG 38 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */ +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUMBState *env) +{ + int i, pos = 0; + + for (i = 0; i < 32; i++) { + (*regs)[pos++] = tswapreg(env->regs[i]); + } + + (*regs)[pos++] = tswapreg(env->pc); + (*regs)[pos++] = tswapreg(mb_cpu_read_msr(env)); + (*regs)[pos++] = 0; + (*regs)[pos++] = tswapreg(env->ear); + (*regs)[pos++] = 0; + (*regs)[pos++] = tswapreg(env->esr); +} + +#endif /* TARGET_MICROBLAZE */ + +#ifdef TARGET_NIOS2 + +#define ELF_START_MMAP 0x80000000 + +#define elf_check_arch(x) ((x) == EM_ALTERA_NIOS2) + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_ALTERA_NIOS2 + +static void init_thread(struct target_pt_regs *regs, struct image_info *infop) +{ + regs->ea = infop->entry; + regs->sp = infop->start_stack; + regs->estatus = 0x3; +} + +#define ELF_EXEC_PAGESIZE 4096 + +#define USE_ELF_CORE_DUMP +#define ELF_NREG 49 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* See linux kernel: arch/mips/kernel/process.c:elf_dump_regs. */ +static void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUNios2State *env) +{ + int i; + + (*regs)[0] = -1; + for (i = 1; i < 8; i++) /* r0-r7 */ + (*regs)[i] = tswapreg(env->regs[i + 7]); + + for (i = 8; i < 16; i++) /* r8-r15 */ + (*regs)[i] = tswapreg(env->regs[i - 8]); + + for (i = 16; i < 24; i++) /* r16-r23 */ + (*regs)[i] = tswapreg(env->regs[i + 7]); + (*regs)[24] = -1; /* R_ET */ + (*regs)[25] = -1; /* R_BT */ + (*regs)[26] = tswapreg(env->regs[R_GP]); + (*regs)[27] = tswapreg(env->regs[R_SP]); + (*regs)[28] = tswapreg(env->regs[R_FP]); + (*regs)[29] = tswapreg(env->regs[R_EA]); + (*regs)[30] = -1; /* R_SSTATUS */ + (*regs)[31] = tswapreg(env->regs[R_RA]); + + (*regs)[32] = tswapreg(env->regs[R_PC]); + + (*regs)[33] = -1; /* R_STATUS */ + (*regs)[34] = tswapreg(env->regs[CR_ESTATUS]); + + for (i = 35; i < 49; i++) /* ... */ + (*regs)[i] = -1; +} + +#endif /* TARGET_NIOS2 */ + +#ifdef TARGET_OPENRISC + +#define ELF_START_MMAP 0x08000000 + +#define ELF_ARCH EM_OPENRISC +#define ELF_CLASS ELFCLASS32 +#define ELF_DATA ELFDATA2MSB + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->pc = infop->entry; + regs->gpr[1] = infop->start_stack; +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 8192 + +/* See linux kernel arch/openrisc/include/asm/elf.h. */ +#define ELF_NREG 34 /* gprs and pc, sr */ +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUOpenRISCState *env) +{ + int i; + + for (i = 0; i < 32; i++) { + (*regs)[i] = tswapreg(cpu_get_gpr(env, i)); + } + (*regs)[32] = tswapreg(env->pc); + (*regs)[33] = tswapreg(cpu_get_sr(env)); +} +#define ELF_HWCAP 0 +#define ELF_PLATFORM NULL + +#endif /* TARGET_OPENRISC */ + +#ifdef TARGET_SH4 + +#define ELF_START_MMAP 0x80000000 + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_SH + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + /* Check other registers XXXXX */ + regs->pc = infop->entry; + regs->regs[15] = infop->start_stack; +} + +/* See linux kernel: arch/sh/include/asm/elf.h. */ +#define ELF_NREG 23 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +/* See linux kernel: arch/sh/include/asm/ptrace.h. */ +enum { + TARGET_REG_PC = 16, + TARGET_REG_PR = 17, + TARGET_REG_SR = 18, + TARGET_REG_GBR = 19, + TARGET_REG_MACH = 20, + TARGET_REG_MACL = 21, + TARGET_REG_SYSCALL = 22 +}; + +static inline void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUSH4State *env) +{ + int i; + + for (i = 0; i < 16; i++) { + (*regs)[i] = tswapreg(env->gregs[i]); + } + + (*regs)[TARGET_REG_PC] = tswapreg(env->pc); + (*regs)[TARGET_REG_PR] = tswapreg(env->pr); + (*regs)[TARGET_REG_SR] = tswapreg(env->sr); + (*regs)[TARGET_REG_GBR] = tswapreg(env->gbr); + (*regs)[TARGET_REG_MACH] = tswapreg(env->mach); + (*regs)[TARGET_REG_MACL] = tswapreg(env->macl); + (*regs)[TARGET_REG_SYSCALL] = 0; /* FIXME */ +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +enum { + SH_CPU_HAS_FPU = 0x0001, /* Hardware FPU support */ + SH_CPU_HAS_P2_FLUSH_BUG = 0x0002, /* Need to flush the cache in P2 area */ + SH_CPU_HAS_MMU_PAGE_ASSOC = 0x0004, /* SH3: TLB way selection bit support */ + SH_CPU_HAS_DSP = 0x0008, /* SH-DSP: DSP support */ + SH_CPU_HAS_PERF_COUNTER = 0x0010, /* Hardware performance counters */ + SH_CPU_HAS_PTEA = 0x0020, /* PTEA register */ + SH_CPU_HAS_LLSC = 0x0040, /* movli.l/movco.l */ + SH_CPU_HAS_L2_CACHE = 0x0080, /* Secondary cache / URAM */ + SH_CPU_HAS_OP32 = 0x0100, /* 32-bit instruction support */ + SH_CPU_HAS_PTEAEX = 0x0200, /* PTE ASID Extension support */ +}; + +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ + SuperHCPU *cpu = SUPERH_CPU(thread_cpu); + uint32_t hwcap = 0; + + hwcap |= SH_CPU_HAS_FPU; + + if (cpu->env.features & SH_FEATURE_SH4A) { + hwcap |= SH_CPU_HAS_LLSC; + } + + return hwcap; +} + +#endif + +#ifdef TARGET_CRIS + +#define ELF_START_MMAP 0x80000000 + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_CRIS + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->erp = infop->entry; +} + +#define ELF_EXEC_PAGESIZE 8192 + +#endif + +#ifdef TARGET_M68K + +#define ELF_START_MMAP 0x80000000 + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_68K + +/* ??? Does this need to do anything? + #define ELF_PLAT_INIT(_r) */ + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->usp = infop->start_stack; + regs->sr = 0; + regs->pc = infop->entry; +} + +/* See linux kernel: arch/m68k/include/asm/elf.h. */ +#define ELF_NREG 20 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, const CPUM68KState *env) +{ + (*regs)[0] = tswapreg(env->dregs[1]); + (*regs)[1] = tswapreg(env->dregs[2]); + (*regs)[2] = tswapreg(env->dregs[3]); + (*regs)[3] = tswapreg(env->dregs[4]); + (*regs)[4] = tswapreg(env->dregs[5]); + (*regs)[5] = tswapreg(env->dregs[6]); + (*regs)[6] = tswapreg(env->dregs[7]); + (*regs)[7] = tswapreg(env->aregs[0]); + (*regs)[8] = tswapreg(env->aregs[1]); + (*regs)[9] = tswapreg(env->aregs[2]); + (*regs)[10] = tswapreg(env->aregs[3]); + (*regs)[11] = tswapreg(env->aregs[4]); + (*regs)[12] = tswapreg(env->aregs[5]); + (*regs)[13] = tswapreg(env->aregs[6]); + (*regs)[14] = tswapreg(env->dregs[0]); + (*regs)[15] = tswapreg(env->aregs[7]); + (*regs)[16] = tswapreg(env->dregs[0]); /* FIXME: orig_d0 */ + (*regs)[17] = tswapreg(env->sr); + (*regs)[18] = tswapreg(env->pc); + (*regs)[19] = 0; /* FIXME: regs->format | regs->vector */ +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 8192 + +#endif + +#ifdef TARGET_ALPHA + +#define ELF_START_MMAP (0x30000000000ULL) + +#define ELF_CLASS ELFCLASS64 +#define ELF_ARCH EM_ALPHA + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->pc = infop->entry; + regs->ps = 8; + regs->usp = infop->start_stack; +} + +#define ELF_EXEC_PAGESIZE 8192 + +#endif /* TARGET_ALPHA */ + +#ifdef TARGET_S390X + +#define ELF_START_MMAP (0x20000000000ULL) + +#define ELF_CLASS ELFCLASS64 +#define ELF_DATA ELFDATA2MSB +#define ELF_ARCH EM_S390 + +#include "elf.h" + +#define ELF_HWCAP get_elf_hwcap() + +#define GET_FEATURE(_feat, _hwcap) \ + do { if (s390_has_feat(_feat)) { hwcap |= _hwcap; } } while (0) + +static uint32_t get_elf_hwcap(void) +{ + /* + * Let's assume we always have esan3 and zarch. + * 31-bit processes can use 64-bit registers (high gprs). + */ + uint32_t hwcap = HWCAP_S390_ESAN3 | HWCAP_S390_ZARCH | HWCAP_S390_HIGH_GPRS; + + GET_FEATURE(S390_FEAT_STFLE, HWCAP_S390_STFLE); + GET_FEATURE(S390_FEAT_MSA, HWCAP_S390_MSA); + GET_FEATURE(S390_FEAT_LONG_DISPLACEMENT, HWCAP_S390_LDISP); + GET_FEATURE(S390_FEAT_EXTENDED_IMMEDIATE, HWCAP_S390_EIMM); + if (s390_has_feat(S390_FEAT_EXTENDED_TRANSLATION_3) && + s390_has_feat(S390_FEAT_ETF3_ENH)) { + hwcap |= HWCAP_S390_ETF3EH; + } + GET_FEATURE(S390_FEAT_VECTOR, HWCAP_S390_VXRS); + GET_FEATURE(S390_FEAT_VECTOR_ENH, HWCAP_S390_VXRS_EXT); + + return hwcap; +} + +static inline void init_thread(struct target_pt_regs *regs, struct image_info *infop) +{ + regs->psw.addr = infop->entry; + regs->psw.mask = PSW_MASK_64 | PSW_MASK_32; + regs->gprs[15] = infop->start_stack; +} + +/* See linux kernel: arch/s390/include/uapi/asm/ptrace.h (s390_regs). */ +#define ELF_NREG 27 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +enum { + TARGET_REG_PSWM = 0, + TARGET_REG_PSWA = 1, + TARGET_REG_GPRS = 2, + TARGET_REG_ARS = 18, + TARGET_REG_ORIG_R2 = 26, +}; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUS390XState *env) +{ + int i; + uint32_t *aregs; + + (*regs)[TARGET_REG_PSWM] = tswapreg(env->psw.mask); + (*regs)[TARGET_REG_PSWA] = tswapreg(env->psw.addr); + for (i = 0; i < 16; i++) { + (*regs)[TARGET_REG_GPRS + i] = tswapreg(env->regs[i]); + } + aregs = (uint32_t *)&((*regs)[TARGET_REG_ARS]); + for (i = 0; i < 16; i++) { + aregs[i] = tswap32(env->aregs[i]); + } + (*regs)[TARGET_REG_ORIG_R2] = 0; +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +#endif /* TARGET_S390X */ + +#ifdef TARGET_RISCV + +#define ELF_START_MMAP 0x80000000 +#define ELF_ARCH EM_RISCV + +#ifdef TARGET_RISCV32 +#define ELF_CLASS ELFCLASS32 +#else +#define ELF_CLASS ELFCLASS64 +#endif + +#define ELF_HWCAP get_elf_hwcap() + +static uint32_t get_elf_hwcap(void) +{ +#define MISA_BIT(EXT) (1 << (EXT - 'A')) + RISCVCPU *cpu = RISCV_CPU(thread_cpu); + uint32_t mask = MISA_BIT('I') | MISA_BIT('M') | MISA_BIT('A') + | MISA_BIT('F') | MISA_BIT('D') | MISA_BIT('C'); + + return cpu->env.misa_ext & mask; +#undef MISA_BIT +} + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->sepc = infop->entry; + regs->sp = infop->start_stack; +} + +#define ELF_EXEC_PAGESIZE 4096 + +#endif /* TARGET_RISCV */ + +#ifdef TARGET_HPPA + +#define ELF_START_MMAP 0x80000000 +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_PARISC +#define ELF_PLATFORM "PARISC" +#define STACK_GROWS_DOWN 0 +#define STACK_ALIGNMENT 64 + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->iaoq[0] = infop->entry; + regs->iaoq[1] = infop->entry + 4; + regs->gr[23] = 0; + regs->gr[24] = infop->arg_start; + regs->gr[25] = (infop->arg_end - infop->arg_start) / sizeof(abi_ulong); + /* The top-of-stack contains a linkage buffer. */ + regs->gr[30] = infop->start_stack + 64; + regs->gr[31] = infop->entry; +} + +#endif /* TARGET_HPPA */ + +#ifdef TARGET_XTENSA + +#define ELF_START_MMAP 0x20000000 + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_XTENSA + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->windowbase = 0; + regs->windowstart = 1; + regs->areg[1] = infop->start_stack; + regs->pc = infop->entry; +} + +/* See linux kernel: arch/xtensa/include/asm/elf.h. */ +#define ELF_NREG 128 +typedef target_elf_greg_t target_elf_gregset_t[ELF_NREG]; + +enum { + TARGET_REG_PC, + TARGET_REG_PS, + TARGET_REG_LBEG, + TARGET_REG_LEND, + TARGET_REG_LCOUNT, + TARGET_REG_SAR, + TARGET_REG_WINDOWSTART, + TARGET_REG_WINDOWBASE, + TARGET_REG_THREADPTR, + TARGET_REG_AR0 = 64, +}; + +static void elf_core_copy_regs(target_elf_gregset_t *regs, + const CPUXtensaState *env) +{ + unsigned i; + + (*regs)[TARGET_REG_PC] = tswapreg(env->pc); + (*regs)[TARGET_REG_PS] = tswapreg(env->sregs[PS] & ~PS_EXCM); + (*regs)[TARGET_REG_LBEG] = tswapreg(env->sregs[LBEG]); + (*regs)[TARGET_REG_LEND] = tswapreg(env->sregs[LEND]); + (*regs)[TARGET_REG_LCOUNT] = tswapreg(env->sregs[LCOUNT]); + (*regs)[TARGET_REG_SAR] = tswapreg(env->sregs[SAR]); + (*regs)[TARGET_REG_WINDOWSTART] = tswapreg(env->sregs[WINDOW_START]); + (*regs)[TARGET_REG_WINDOWBASE] = tswapreg(env->sregs[WINDOW_BASE]); + (*regs)[TARGET_REG_THREADPTR] = tswapreg(env->uregs[THREADPTR]); + xtensa_sync_phys_from_window((CPUXtensaState *)env); + for (i = 0; i < env->config->nareg; ++i) { + (*regs)[TARGET_REG_AR0 + i] = tswapreg(env->phys_regs[i]); + } +} + +#define USE_ELF_CORE_DUMP +#define ELF_EXEC_PAGESIZE 4096 + +#endif /* TARGET_XTENSA */ + +#ifdef TARGET_HEXAGON + +#define ELF_START_MMAP 0x20000000 + +#define ELF_CLASS ELFCLASS32 +#define ELF_ARCH EM_HEXAGON + +static inline void init_thread(struct target_pt_regs *regs, + struct image_info *infop) +{ + regs->sepc = infop->entry; + regs->sp = infop->start_stack; +} + +#endif /* TARGET_HEXAGON */ + +#ifndef ELF_PLATFORM +#define ELF_PLATFORM (NULL) +#endif + +#ifndef ELF_MACHINE +#define ELF_MACHINE ELF_ARCH +#endif + +#ifndef elf_check_arch +#define elf_check_arch(x) ((x) == ELF_ARCH) +#endif + +#ifndef elf_check_abi +#define elf_check_abi(x) (1) +#endif + +#ifndef ELF_HWCAP +#define ELF_HWCAP 0 +#endif + +#ifndef STACK_GROWS_DOWN +#define STACK_GROWS_DOWN 1 +#endif + +#ifndef STACK_ALIGNMENT +#define STACK_ALIGNMENT 16 +#endif + +#ifdef TARGET_ABI32 +#undef ELF_CLASS +#define ELF_CLASS ELFCLASS32 +#undef bswaptls +#define bswaptls(ptr) bswap32s(ptr) +#endif + +#include "elf.h" + +/* We must delay the following stanzas until after "elf.h". */ +#if defined(TARGET_AARCH64) + +static bool arch_parse_elf_property(uint32_t pr_type, uint32_t pr_datasz, + const uint32_t *data, + struct image_info *info, + Error **errp) +{ + if (pr_type == GNU_PROPERTY_AARCH64_FEATURE_1_AND) { + if (pr_datasz != sizeof(uint32_t)) { + error_setg(errp, "Ill-formed GNU_PROPERTY_AARCH64_FEATURE_1_AND"); + return false; + } + /* We will extract GNU_PROPERTY_AARCH64_FEATURE_1_BTI later. */ + info->note_flags = *data; + } + return true; +} +#define ARCH_USE_GNU_PROPERTY 1 + +#else + +static bool arch_parse_elf_property(uint32_t pr_type, uint32_t pr_datasz, + const uint32_t *data, + struct image_info *info, + Error **errp) +{ + g_assert_not_reached(); +} +#define ARCH_USE_GNU_PROPERTY 0 + +#endif + +struct exec +{ + unsigned int a_info; /* Use macros N_MAGIC, etc for access */ + unsigned int a_text; /* length of text, in bytes */ + unsigned int a_data; /* length of data, in bytes */ + unsigned int a_bss; /* length of uninitialized data area, in bytes */ + unsigned int a_syms; /* length of symbol table data in file, in bytes */ + unsigned int a_entry; /* start address */ + unsigned int a_trsize; /* length of relocation info for text, in bytes */ + unsigned int a_drsize; /* length of relocation info for data, in bytes */ +}; + + +#define N_MAGIC(exec) ((exec).a_info & 0xffff) +#define OMAGIC 0407 +#define NMAGIC 0410 +#define ZMAGIC 0413 +#define QMAGIC 0314 + +/* Necessary parameters */ +#define TARGET_ELF_EXEC_PAGESIZE \ + (((eppnt->p_align & ~qemu_host_page_mask) != 0) ? \ + TARGET_PAGE_SIZE : MAX(qemu_host_page_size, TARGET_PAGE_SIZE)) +#define TARGET_ELF_PAGELENGTH(_v) ROUND_UP((_v), TARGET_ELF_EXEC_PAGESIZE) +#define TARGET_ELF_PAGESTART(_v) ((_v) & \ + ~(abi_ulong)(TARGET_ELF_EXEC_PAGESIZE-1)) +#define TARGET_ELF_PAGEOFFSET(_v) ((_v) & (TARGET_ELF_EXEC_PAGESIZE-1)) + +#define DLINFO_ITEMS 16 + +static inline void memcpy_fromfs(void * to, const void * from, unsigned long n) +{ + memcpy(to, from, n); +} + +#ifdef BSWAP_NEEDED +static void bswap_ehdr(struct elfhdr *ehdr) +{ + bswap16s(&ehdr->e_type); /* Object file type */ + bswap16s(&ehdr->e_machine); /* Architecture */ + bswap32s(&ehdr->e_version); /* Object file version */ + bswaptls(&ehdr->e_entry); /* Entry point virtual address */ + bswaptls(&ehdr->e_phoff); /* Program header table file offset */ + bswaptls(&ehdr->e_shoff); /* Section header table file offset */ + bswap32s(&ehdr->e_flags); /* Processor-specific flags */ + bswap16s(&ehdr->e_ehsize); /* ELF header size in bytes */ + bswap16s(&ehdr->e_phentsize); /* Program header table entry size */ + bswap16s(&ehdr->e_phnum); /* Program header table entry count */ + bswap16s(&ehdr->e_shentsize); /* Section header table entry size */ + bswap16s(&ehdr->e_shnum); /* Section header table entry count */ + bswap16s(&ehdr->e_shstrndx); /* Section header string table index */ +} + +static void bswap_phdr(struct elf_phdr *phdr, int phnum) +{ + int i; + for (i = 0; i < phnum; ++i, ++phdr) { + bswap32s(&phdr->p_type); /* Segment type */ + bswap32s(&phdr->p_flags); /* Segment flags */ + bswaptls(&phdr->p_offset); /* Segment file offset */ + bswaptls(&phdr->p_vaddr); /* Segment virtual address */ + bswaptls(&phdr->p_paddr); /* Segment physical address */ + bswaptls(&phdr->p_filesz); /* Segment size in file */ + bswaptls(&phdr->p_memsz); /* Segment size in memory */ + bswaptls(&phdr->p_align); /* Segment alignment */ + } +} + +static void bswap_shdr(struct elf_shdr *shdr, int shnum) +{ + int i; + for (i = 0; i < shnum; ++i, ++shdr) { + bswap32s(&shdr->sh_name); + bswap32s(&shdr->sh_type); + bswaptls(&shdr->sh_flags); + bswaptls(&shdr->sh_addr); + bswaptls(&shdr->sh_offset); + bswaptls(&shdr->sh_size); + bswap32s(&shdr->sh_link); + bswap32s(&shdr->sh_info); + bswaptls(&shdr->sh_addralign); + bswaptls(&shdr->sh_entsize); + } +} + +static void bswap_sym(struct elf_sym *sym) +{ + bswap32s(&sym->st_name); + bswaptls(&sym->st_value); + bswaptls(&sym->st_size); + bswap16s(&sym->st_shndx); +} + +#ifdef TARGET_MIPS +static void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags) +{ + bswap16s(&abiflags->version); + bswap32s(&abiflags->ases); + bswap32s(&abiflags->isa_ext); + bswap32s(&abiflags->flags1); + bswap32s(&abiflags->flags2); +} +#endif +#else +static inline void bswap_ehdr(struct elfhdr *ehdr) { } +static inline void bswap_phdr(struct elf_phdr *phdr, int phnum) { } +static inline void bswap_shdr(struct elf_shdr *shdr, int shnum) { } +static inline void bswap_sym(struct elf_sym *sym) { } +#ifdef TARGET_MIPS +static inline void bswap_mips_abiflags(Mips_elf_abiflags_v0 *abiflags) { } +#endif +#endif + +#ifdef USE_ELF_CORE_DUMP +static int elf_core_dump(int, const CPUArchState *); +#endif /* USE_ELF_CORE_DUMP */ +static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias); + +/* Verify the portions of EHDR within E_IDENT for the target. + This can be performed before bswapping the entire header. */ +static bool elf_check_ident(struct elfhdr *ehdr) +{ + return (ehdr->e_ident[EI_MAG0] == ELFMAG0 + && ehdr->e_ident[EI_MAG1] == ELFMAG1 + && ehdr->e_ident[EI_MAG2] == ELFMAG2 + && ehdr->e_ident[EI_MAG3] == ELFMAG3 + && ehdr->e_ident[EI_CLASS] == ELF_CLASS + && ehdr->e_ident[EI_DATA] == ELF_DATA + && ehdr->e_ident[EI_VERSION] == EV_CURRENT); +} + +/* Verify the portions of EHDR outside of E_IDENT for the target. + This has to wait until after bswapping the header. */ +static bool elf_check_ehdr(struct elfhdr *ehdr) +{ + return (elf_check_arch(ehdr->e_machine) + && elf_check_abi(ehdr->e_flags) + && ehdr->e_ehsize == sizeof(struct elfhdr) + && ehdr->e_phentsize == sizeof(struct elf_phdr) + && (ehdr->e_type == ET_EXEC || ehdr->e_type == ET_DYN)); +} + +/* + * 'copy_elf_strings()' copies argument/envelope strings from user + * memory to free pages in kernel mem. These are in a format ready + * to be put directly into the top of new user memory. + * + */ +static abi_ulong copy_elf_strings(int argc, char **argv, char *scratch, + abi_ulong p, abi_ulong stack_limit) +{ + char *tmp; + int len, i; + abi_ulong top = p; + + if (!p) { + return 0; /* bullet-proofing */ + } + + if (STACK_GROWS_DOWN) { + int offset = ((p - 1) % TARGET_PAGE_SIZE) + 1; + for (i = argc - 1; i >= 0; --i) { + tmp = argv[i]; + if (!tmp) { + fprintf(stderr, "VFS: argc is wrong"); + exit(-1); + } + len = strlen(tmp) + 1; + tmp += len; + + if (len > (p - stack_limit)) { + return 0; + } + while (len) { + int bytes_to_copy = (len > offset) ? offset : len; + tmp -= bytes_to_copy; + p -= bytes_to_copy; + offset -= bytes_to_copy; + len -= bytes_to_copy; + + memcpy_fromfs(scratch + offset, tmp, bytes_to_copy); + + if (offset == 0) { + memcpy_to_target(p, scratch, top - p); + top = p; + offset = TARGET_PAGE_SIZE; + } + } + } + if (p != top) { + memcpy_to_target(p, scratch + offset, top - p); + } + } else { + int remaining = TARGET_PAGE_SIZE - (p % TARGET_PAGE_SIZE); + for (i = 0; i < argc; ++i) { + tmp = argv[i]; + if (!tmp) { + fprintf(stderr, "VFS: argc is wrong"); + exit(-1); + } + len = strlen(tmp) + 1; + if (len > (stack_limit - p)) { + return 0; + } + while (len) { + int bytes_to_copy = (len > remaining) ? remaining : len; + + memcpy_fromfs(scratch + (p - top), tmp, bytes_to_copy); + + tmp += bytes_to_copy; + remaining -= bytes_to_copy; + p += bytes_to_copy; + len -= bytes_to_copy; + + if (remaining == 0) { + memcpy_to_target(top, scratch, p - top); + top = p; + remaining = TARGET_PAGE_SIZE; + } + } + } + if (p != top) { + memcpy_to_target(top, scratch, p - top); + } + } + + return p; +} + +/* Older linux kernels provide up to MAX_ARG_PAGES (default: 32) of + * argument/environment space. Newer kernels (>2.6.33) allow more, + * dependent on stack size, but guarantee at least 32 pages for + * backwards compatibility. + */ +#define STACK_LOWER_LIMIT (32 * TARGET_PAGE_SIZE) + +static abi_ulong setup_arg_pages(struct linux_binprm *bprm, + struct image_info *info) +{ + abi_ulong size, error, guard; + + size = guest_stack_size; + if (size < STACK_LOWER_LIMIT) { + size = STACK_LOWER_LIMIT; + } + guard = TARGET_PAGE_SIZE; + if (guard < qemu_real_host_page_size) { + guard = qemu_real_host_page_size; + } + + error = target_mmap(0, size + guard, PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + if (error == -1) { + perror("mmap stack"); + exit(-1); + } + + /* We reserve one extra page at the top of the stack as guard. */ + if (STACK_GROWS_DOWN) { + target_mprotect(error, guard, PROT_NONE); + info->stack_limit = error + guard; + return info->stack_limit + size - sizeof(void *); + } else { + target_mprotect(error + size, guard, PROT_NONE); + info->stack_limit = error + size; + return error; + } +} + +/* Map and zero the bss. We need to explicitly zero any fractional pages + after the data section (i.e. bss). */ +static void zero_bss(abi_ulong elf_bss, abi_ulong last_bss, int prot) +{ + uintptr_t host_start, host_map_start, host_end; + + last_bss = TARGET_PAGE_ALIGN(last_bss); + + /* ??? There is confusion between qemu_real_host_page_size and + qemu_host_page_size here and elsewhere in target_mmap, which + may lead to the end of the data section mapping from the file + not being mapped. At least there was an explicit test and + comment for that here, suggesting that "the file size must + be known". The comment probably pre-dates the introduction + of the fstat system call in target_mmap which does in fact + find out the size. What isn't clear is if the workaround + here is still actually needed. For now, continue with it, + but merge it with the "normal" mmap that would allocate the bss. */ + + host_start = (uintptr_t) g2h_untagged(elf_bss); + host_end = (uintptr_t) g2h_untagged(last_bss); + host_map_start = REAL_HOST_PAGE_ALIGN(host_start); + + if (host_map_start < host_end) { + void *p = mmap((void *)host_map_start, host_end - host_map_start, + prot, MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + if (p == MAP_FAILED) { + perror("cannot mmap brk"); + exit(-1); + } + } + + /* Ensure that the bss page(s) are valid */ + if ((page_get_flags(last_bss-1) & prot) != prot) { + page_set_flags(elf_bss & TARGET_PAGE_MASK, last_bss, prot | PAGE_VALID); + } + + if (host_start < host_map_start) { + memset((void *)host_start, 0, host_map_start - host_start); + } +} + +#ifdef TARGET_ARM +static int elf_is_fdpic(struct elfhdr *exec) +{ + return exec->e_ident[EI_OSABI] == ELFOSABI_ARM_FDPIC; +} +#else +/* Default implementation, always false. */ +static int elf_is_fdpic(struct elfhdr *exec) +{ + return 0; +} +#endif + +static abi_ulong loader_build_fdpic_loadmap(struct image_info *info, abi_ulong sp) +{ + uint16_t n; + struct elf32_fdpic_loadseg *loadsegs = info->loadsegs; + + /* elf32_fdpic_loadseg */ + n = info->nsegs; + while (n--) { + sp -= 12; + put_user_u32(loadsegs[n].addr, sp+0); + put_user_u32(loadsegs[n].p_vaddr, sp+4); + put_user_u32(loadsegs[n].p_memsz, sp+8); + } + + /* elf32_fdpic_loadmap */ + sp -= 4; + put_user_u16(0, sp+0); /* version */ + put_user_u16(info->nsegs, sp+2); /* nsegs */ + + info->personality = PER_LINUX_FDPIC; + info->loadmap_addr = sp; + + return sp; +} + +static abi_ulong create_elf_tables(abi_ulong p, int argc, int envc, + struct elfhdr *exec, + struct image_info *info, + struct image_info *interp_info) +{ + abi_ulong sp; + abi_ulong u_argc, u_argv, u_envp, u_auxv; + int size; + int i; + abi_ulong u_rand_bytes; + uint8_t k_rand_bytes[16]; + abi_ulong u_platform; + const char *k_platform; + const int n = sizeof(elf_addr_t); + + sp = p; + + /* Needs to be before we load the env/argc/... */ + if (elf_is_fdpic(exec)) { + /* Need 4 byte alignment for these structs */ + sp &= ~3; + sp = loader_build_fdpic_loadmap(info, sp); + info->other_info = interp_info; + if (interp_info) { + interp_info->other_info = info; + sp = loader_build_fdpic_loadmap(interp_info, sp); + info->interpreter_loadmap_addr = interp_info->loadmap_addr; + info->interpreter_pt_dynamic_addr = interp_info->pt_dynamic_addr; + } else { + info->interpreter_loadmap_addr = 0; + info->interpreter_pt_dynamic_addr = 0; + } + } + + u_platform = 0; + k_platform = ELF_PLATFORM; + if (k_platform) { + size_t len = strlen(k_platform) + 1; + if (STACK_GROWS_DOWN) { + sp -= (len + n - 1) & ~(n - 1); + u_platform = sp; + /* FIXME - check return value of memcpy_to_target() for failure */ + memcpy_to_target(sp, k_platform, len); + } else { + memcpy_to_target(sp, k_platform, len); + u_platform = sp; + sp += len + 1; + } + } + + /* Provide 16 byte alignment for the PRNG, and basic alignment for + * the argv and envp pointers. + */ + if (STACK_GROWS_DOWN) { + sp = QEMU_ALIGN_DOWN(sp, 16); + } else { + sp = QEMU_ALIGN_UP(sp, 16); + } + + /* + * Generate 16 random bytes for userspace PRNG seeding. + */ + qemu_guest_getrandom_nofail(k_rand_bytes, sizeof(k_rand_bytes)); + if (STACK_GROWS_DOWN) { + sp -= 16; + u_rand_bytes = sp; + /* FIXME - check return value of memcpy_to_target() for failure */ + memcpy_to_target(sp, k_rand_bytes, 16); + } else { + memcpy_to_target(sp, k_rand_bytes, 16); + u_rand_bytes = sp; + sp += 16; + } + + size = (DLINFO_ITEMS + 1) * 2; + if (k_platform) + size += 2; +#ifdef DLINFO_ARCH_ITEMS + size += DLINFO_ARCH_ITEMS * 2; +#endif +#ifdef ELF_HWCAP2 + size += 2; +#endif + info->auxv_len = size * n; + + size += envc + argc + 2; + size += 1; /* argc itself */ + size *= n; + + /* Allocate space and finalize stack alignment for entry now. */ + if (STACK_GROWS_DOWN) { + u_argc = QEMU_ALIGN_DOWN(sp - size, STACK_ALIGNMENT); + sp = u_argc; + } else { + u_argc = sp; + sp = QEMU_ALIGN_UP(sp + size, STACK_ALIGNMENT); + } + + u_argv = u_argc + n; + u_envp = u_argv + (argc + 1) * n; + u_auxv = u_envp + (envc + 1) * n; + info->saved_auxv = u_auxv; + info->arg_start = u_argv; + info->arg_end = u_argv + argc * n; + + /* This is correct because Linux defines + * elf_addr_t as Elf32_Off / Elf64_Off + */ +#define NEW_AUX_ENT(id, val) do { \ + put_user_ual(id, u_auxv); u_auxv += n; \ + put_user_ual(val, u_auxv); u_auxv += n; \ + } while(0) + +#ifdef ARCH_DLINFO + /* + * ARCH_DLINFO must come first so platform specific code can enforce + * special alignment requirements on the AUXV if necessary (eg. PPC). + */ + ARCH_DLINFO; +#endif + /* There must be exactly DLINFO_ITEMS entries here, or the assert + * on info->auxv_len will trigger. + */ + NEW_AUX_ENT(AT_PHDR, (abi_ulong)(info->load_addr + exec->e_phoff)); + NEW_AUX_ENT(AT_PHENT, (abi_ulong)(sizeof (struct elf_phdr))); + NEW_AUX_ENT(AT_PHNUM, (abi_ulong)(exec->e_phnum)); + if ((info->alignment & ~qemu_host_page_mask) != 0) { + /* Target doesn't support host page size alignment */ + NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(TARGET_PAGE_SIZE)); + } else { + NEW_AUX_ENT(AT_PAGESZ, (abi_ulong)(MAX(TARGET_PAGE_SIZE, + qemu_host_page_size))); + } + NEW_AUX_ENT(AT_BASE, (abi_ulong)(interp_info ? interp_info->load_addr : 0)); + NEW_AUX_ENT(AT_FLAGS, (abi_ulong)0); + NEW_AUX_ENT(AT_ENTRY, info->entry); + NEW_AUX_ENT(AT_UID, (abi_ulong) getuid()); + NEW_AUX_ENT(AT_EUID, (abi_ulong) geteuid()); + NEW_AUX_ENT(AT_GID, (abi_ulong) getgid()); + NEW_AUX_ENT(AT_EGID, (abi_ulong) getegid()); + NEW_AUX_ENT(AT_HWCAP, (abi_ulong) ELF_HWCAP); + NEW_AUX_ENT(AT_CLKTCK, (abi_ulong) sysconf(_SC_CLK_TCK)); + NEW_AUX_ENT(AT_RANDOM, (abi_ulong) u_rand_bytes); + NEW_AUX_ENT(AT_SECURE, (abi_ulong) qemu_getauxval(AT_SECURE)); + NEW_AUX_ENT(AT_EXECFN, info->file_string); + +#ifdef ELF_HWCAP2 + NEW_AUX_ENT(AT_HWCAP2, (abi_ulong) ELF_HWCAP2); +#endif + + if (u_platform) { + NEW_AUX_ENT(AT_PLATFORM, u_platform); + } + NEW_AUX_ENT (AT_NULL, 0); +#undef NEW_AUX_ENT + + /* Check that our initial calculation of the auxv length matches how much + * we actually put into it. + */ + assert(info->auxv_len == u_auxv - info->saved_auxv); + + put_user_ual(argc, u_argc); + + p = info->arg_strings; + for (i = 0; i < argc; ++i) { + put_user_ual(p, u_argv); + u_argv += n; + p += target_strlen(p) + 1; + } + put_user_ual(0, u_argv); + + p = info->env_strings; + for (i = 0; i < envc; ++i) { + put_user_ual(p, u_envp); + u_envp += n; + p += target_strlen(p) + 1; + } + put_user_ual(0, u_envp); + + return sp; +} + +#ifndef ARM_COMMPAGE +#define ARM_COMMPAGE 0 +#define init_guest_commpage() true +#endif + +static void pgb_fail_in_use(const char *image_name) +{ + error_report("%s: requires virtual address space that is in use " + "(omit the -B option or choose a different value)", + image_name); + exit(EXIT_FAILURE); +} + +static void pgb_have_guest_base(const char *image_name, abi_ulong guest_loaddr, + abi_ulong guest_hiaddr, long align) +{ + const int flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE; + void *addr, *test; + + if (!QEMU_IS_ALIGNED(guest_base, align)) { + fprintf(stderr, "Requested guest base %p does not satisfy " + "host minimum alignment (0x%lx)\n", + (void *)guest_base, align); + exit(EXIT_FAILURE); + } + + /* Sanity check the guest binary. */ + if (reserved_va) { + if (guest_hiaddr > reserved_va) { + error_report("%s: requires more than reserved virtual " + "address space (0x%" PRIx64 " > 0x%lx)", + image_name, (uint64_t)guest_hiaddr, reserved_va); + exit(EXIT_FAILURE); + } + } else { +#if HOST_LONG_BITS < TARGET_ABI_BITS + if ((guest_hiaddr - guest_base) > ~(uintptr_t)0) { + error_report("%s: requires more virtual address space " + "than the host can provide (0x%" PRIx64 ")", + image_name, (uint64_t)guest_hiaddr - guest_base); + exit(EXIT_FAILURE); + } +#endif + } + + /* + * Expand the allocation to the entire reserved_va. + * Exclude the mmap_min_addr hole. + */ + if (reserved_va) { + guest_loaddr = (guest_base >= mmap_min_addr ? 0 + : mmap_min_addr - guest_base); + guest_hiaddr = reserved_va; + } + + /* Reserve the address space for the binary, or reserved_va. */ + test = g2h_untagged(guest_loaddr); + addr = mmap(test, guest_hiaddr - guest_loaddr, PROT_NONE, flags, -1, 0); + if (test != addr) { + pgb_fail_in_use(image_name); + } +} + +/** + * pgd_find_hole_fallback: potential mmap address + * @guest_size: size of available space + * @brk: location of break + * @align: memory alignment + * + * This is a fallback method for finding a hole in the host address + * space if we don't have the benefit of being able to access + * /proc/self/map. It can potentially take a very long time as we can + * only dumbly iterate up the host address space seeing if the + * allocation would work. + */ +static uintptr_t pgd_find_hole_fallback(uintptr_t guest_size, uintptr_t brk, + long align, uintptr_t offset) +{ + uintptr_t base; + + /* Start (aligned) at the bottom and work our way up */ + base = ROUND_UP(mmap_min_addr, align); + + while (true) { + uintptr_t align_start, end; + align_start = ROUND_UP(base, align); + end = align_start + guest_size + offset; + + /* if brk is anywhere in the range give ourselves some room to grow. */ + if (align_start <= brk && brk < end) { + base = brk + (16 * MiB); + continue; + } else if (align_start + guest_size < align_start) { + /* we have run out of space */ + return -1; + } else { + int flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE | + MAP_FIXED_NOREPLACE; + void * mmap_start = mmap((void *) align_start, guest_size, + PROT_NONE, flags, -1, 0); + if (mmap_start != MAP_FAILED) { + munmap(mmap_start, guest_size); + if (mmap_start == (void *) align_start) { + return (uintptr_t) mmap_start + offset; + } + } + base += qemu_host_page_size; + } + } +} + +/* Return value for guest_base, or -1 if no hole found. */ +static uintptr_t pgb_find_hole(uintptr_t guest_loaddr, uintptr_t guest_size, + long align, uintptr_t offset) +{ + GSList *maps, *iter; + uintptr_t this_start, this_end, next_start, brk; + intptr_t ret = -1; + + assert(QEMU_IS_ALIGNED(guest_loaddr, align)); + + maps = read_self_maps(); + + /* Read brk after we've read the maps, which will malloc. */ + brk = (uintptr_t)sbrk(0); + + if (!maps) { + ret = pgd_find_hole_fallback(guest_size, brk, align, offset); + return ret == -1 ? -1 : ret - guest_loaddr; + } + + /* The first hole is before the first map entry. */ + this_start = mmap_min_addr; + + for (iter = maps; iter; + this_start = next_start, iter = g_slist_next(iter)) { + uintptr_t align_start, hole_size; + + this_end = ((MapInfo *)iter->data)->start; + next_start = ((MapInfo *)iter->data)->end; + align_start = ROUND_UP(this_start + offset, align); + + /* Skip holes that are too small. */ + if (align_start >= this_end) { + continue; + } + hole_size = this_end - align_start; + if (hole_size < guest_size) { + continue; + } + + /* If this hole contains brk, give ourselves some room to grow. */ + if (this_start <= brk && brk < this_end) { + hole_size -= guest_size; + if (sizeof(uintptr_t) == 8 && hole_size >= 1 * GiB) { + align_start += 1 * GiB; + } else if (hole_size >= 16 * MiB) { + align_start += 16 * MiB; + } else { + align_start = (this_end - guest_size) & -align; + if (align_start < this_start) { + continue; + } + } + } + + /* Record the lowest successful match. */ + if (ret < 0) { + ret = align_start - guest_loaddr; + } + /* If this hole contains the identity map, select it. */ + if (align_start <= guest_loaddr && + guest_loaddr + guest_size <= this_end) { + ret = 0; + } + /* If this hole ends above the identity map, stop looking. */ + if (this_end >= guest_loaddr) { + break; + } + } + free_self_maps(maps); + + return ret; +} + +static void pgb_static(const char *image_name, abi_ulong orig_loaddr, + abi_ulong orig_hiaddr, long align) +{ + uintptr_t loaddr = orig_loaddr; + uintptr_t hiaddr = orig_hiaddr; + uintptr_t offset = 0; + uintptr_t addr; + + if (hiaddr != orig_hiaddr) { + error_report("%s: requires virtual address space that the " + "host cannot provide (0x%" PRIx64 ")", + image_name, (uint64_t)orig_hiaddr); + exit(EXIT_FAILURE); + } + + loaddr &= -align; + if (ARM_COMMPAGE) { + /* + * Extend the allocation to include the commpage. + * For a 64-bit host, this is just 4GiB; for a 32-bit host we + * need to ensure there is space bellow the guest_base so we + * can map the commpage in the place needed when the address + * arithmetic wraps around. + */ + if (sizeof(uintptr_t) == 8 || loaddr >= 0x80000000u) { + hiaddr = (uintptr_t) 4 << 30; + } else { + offset = -(ARM_COMMPAGE & -align); + } + } + + addr = pgb_find_hole(loaddr, hiaddr - loaddr, align, offset); + if (addr == -1) { + /* + * If ARM_COMMPAGE, there *might* be a non-consecutive allocation + * that can satisfy both. But as the normal arm32 link base address + * is ~32k, and we extend down to include the commpage, making the + * overhead only ~96k, this is unlikely. + */ + error_report("%s: Unable to allocate %#zx bytes of " + "virtual address space", image_name, + (size_t)(hiaddr - loaddr)); + exit(EXIT_FAILURE); + } + + guest_base = addr; +} + +static void pgb_dynamic(const char *image_name, long align) +{ + /* + * The executable is dynamic and does not require a fixed address. + * All we need is a commpage that satisfies align. + * If we do not need a commpage, leave guest_base == 0. + */ + if (ARM_COMMPAGE) { + uintptr_t addr, commpage; + + /* 64-bit hosts should have used reserved_va. */ + assert(sizeof(uintptr_t) == 4); + + /* + * By putting the commpage at the first hole, that puts guest_base + * just above that, and maximises the positive guest addresses. + */ + commpage = ARM_COMMPAGE & -align; + addr = pgb_find_hole(commpage, -commpage, align, 0); + assert(addr != -1); + guest_base = addr; + } +} + +static void pgb_reserved_va(const char *image_name, abi_ulong guest_loaddr, + abi_ulong guest_hiaddr, long align) +{ + int flags = MAP_ANONYMOUS | MAP_PRIVATE | MAP_NORESERVE; + void *addr, *test; + + if (guest_hiaddr > reserved_va) { + error_report("%s: requires more than reserved virtual " + "address space (0x%" PRIx64 " > 0x%lx)", + image_name, (uint64_t)guest_hiaddr, reserved_va); + exit(EXIT_FAILURE); + } + + /* Widen the "image" to the entire reserved address space. */ + pgb_static(image_name, 0, reserved_va, align); + + /* osdep.h defines this as 0 if it's missing */ + flags |= MAP_FIXED_NOREPLACE; + + /* Reserve the memory on the host. */ + assert(guest_base != 0); + test = g2h_untagged(0); + addr = mmap(test, reserved_va, PROT_NONE, flags, -1, 0); + if (addr == MAP_FAILED || addr != test) { + error_report("Unable to reserve 0x%lx bytes of virtual address " + "space at %p (%s) for use as guest address space (check your" + "virtual memory ulimit setting, min_mmap_addr or reserve less " + "using -R option)", reserved_va, test, strerror(errno)); + exit(EXIT_FAILURE); + } +} + +void probe_guest_base(const char *image_name, abi_ulong guest_loaddr, + abi_ulong guest_hiaddr) +{ + /* In order to use host shmat, we must be able to honor SHMLBA. */ + uintptr_t align = MAX(SHMLBA, qemu_host_page_size); + + if (have_guest_base) { + pgb_have_guest_base(image_name, guest_loaddr, guest_hiaddr, align); + } else if (reserved_va) { + pgb_reserved_va(image_name, guest_loaddr, guest_hiaddr, align); + } else if (guest_loaddr) { + pgb_static(image_name, guest_loaddr, guest_hiaddr, align); + } else { + pgb_dynamic(image_name, align); + } + + /* Reserve and initialize the commpage. */ + if (!init_guest_commpage()) { + /* + * With have_guest_base, the user has selected the address and + * we are trying to work with that. Otherwise, we have selected + * free space and init_guest_commpage must succeeded. + */ + assert(have_guest_base); + pgb_fail_in_use(image_name); + } + + assert(QEMU_IS_ALIGNED(guest_base, align)); + qemu_log_mask(CPU_LOG_PAGE, "Locating guest address space " + "@ 0x%" PRIx64 "\n", (uint64_t)guest_base); +} + +enum { + /* The string "GNU\0" as a magic number. */ + GNU0_MAGIC = const_le32('G' | 'N' << 8 | 'U' << 16), + NOTE_DATA_SZ = 1 * KiB, + NOTE_NAME_SZ = 4, + ELF_GNU_PROPERTY_ALIGN = ELF_CLASS == ELFCLASS32 ? 4 : 8, +}; + +/* + * Process a single gnu_property entry. + * Return false for error. + */ +static bool parse_elf_property(const uint32_t *data, int *off, int datasz, + struct image_info *info, bool have_prev_type, + uint32_t *prev_type, Error **errp) +{ + uint32_t pr_type, pr_datasz, step; + + if (*off > datasz || !QEMU_IS_ALIGNED(*off, ELF_GNU_PROPERTY_ALIGN)) { + goto error_data; + } + datasz -= *off; + data += *off / sizeof(uint32_t); + + if (datasz < 2 * sizeof(uint32_t)) { + goto error_data; + } + pr_type = data[0]; + pr_datasz = data[1]; + data += 2; + datasz -= 2 * sizeof(uint32_t); + step = ROUND_UP(pr_datasz, ELF_GNU_PROPERTY_ALIGN); + if (step > datasz) { + goto error_data; + } + + /* Properties are supposed to be unique and sorted on pr_type. */ + if (have_prev_type && pr_type <= *prev_type) { + if (pr_type == *prev_type) { + error_setg(errp, "Duplicate property in PT_GNU_PROPERTY"); + } else { + error_setg(errp, "Unsorted property in PT_GNU_PROPERTY"); + } + return false; + } + *prev_type = pr_type; + + if (!arch_parse_elf_property(pr_type, pr_datasz, data, info, errp)) { + return false; + } + + *off += 2 * sizeof(uint32_t) + step; + return true; + + error_data: + error_setg(errp, "Ill-formed property in PT_GNU_PROPERTY"); + return false; +} + +/* Process NT_GNU_PROPERTY_TYPE_0. */ +static bool parse_elf_properties(int image_fd, + struct image_info *info, + const struct elf_phdr *phdr, + char bprm_buf[BPRM_BUF_SIZE], + Error **errp) +{ + union { + struct elf_note nhdr; + uint32_t data[NOTE_DATA_SZ / sizeof(uint32_t)]; + } note; + + int n, off, datasz; + bool have_prev_type; + uint32_t prev_type; + + /* Unless the arch requires properties, ignore them. */ + if (!ARCH_USE_GNU_PROPERTY) { + return true; + } + + /* If the properties are crazy large, that's too bad. */ + n = phdr->p_filesz; + if (n > sizeof(note)) { + error_setg(errp, "PT_GNU_PROPERTY too large"); + return false; + } + if (n < sizeof(note.nhdr)) { + error_setg(errp, "PT_GNU_PROPERTY too small"); + return false; + } + + if (phdr->p_offset + n <= BPRM_BUF_SIZE) { + memcpy(¬e, bprm_buf + phdr->p_offset, n); + } else { + ssize_t len = pread(image_fd, ¬e, n, phdr->p_offset); + if (len != n) { + error_setg_errno(errp, errno, "Error reading file header"); + return false; + } + } + + /* + * The contents of a valid PT_GNU_PROPERTY is a sequence + * of uint32_t -- swap them all now. + */ +#ifdef BSWAP_NEEDED + for (int i = 0; i < n / 4; i++) { + bswap32s(note.data + i); + } +#endif + + /* + * Note that nhdr is 3 words, and that the "name" described by namesz + * immediately follows nhdr and is thus at the 4th word. Further, all + * of the inputs to the kernel's round_up are multiples of 4. + */ + if (note.nhdr.n_type != NT_GNU_PROPERTY_TYPE_0 || + note.nhdr.n_namesz != NOTE_NAME_SZ || + note.data[3] != GNU0_MAGIC) { + error_setg(errp, "Invalid note in PT_GNU_PROPERTY"); + return false; + } + off = sizeof(note.nhdr) + NOTE_NAME_SZ; + + datasz = note.nhdr.n_descsz + off; + if (datasz > n) { + error_setg(errp, "Invalid note size in PT_GNU_PROPERTY"); + return false; + } + + have_prev_type = false; + prev_type = 0; + while (1) { + if (off == datasz) { + return true; /* end, exit ok */ + } + if (!parse_elf_property(note.data, &off, datasz, info, + have_prev_type, &prev_type, errp)) { + return false; + } + have_prev_type = true; + } +} + +/* Load an ELF image into the address space. + + IMAGE_NAME is the filename of the image, to use in error messages. + IMAGE_FD is the open file descriptor for the image. + + BPRM_BUF is a copy of the beginning of the file; this of course + contains the elf file header at offset 0. It is assumed that this + buffer is sufficiently aligned to present no problems to the host + in accessing data at aligned offsets within the buffer. + + On return: INFO values will be filled in, as necessary or available. */ + +static void load_elf_image(const char *image_name, int image_fd, + struct image_info *info, char **pinterp_name, + char bprm_buf[BPRM_BUF_SIZE]) +{ + struct elfhdr *ehdr = (struct elfhdr *)bprm_buf; + struct elf_phdr *phdr; + abi_ulong load_addr, load_bias, loaddr, hiaddr, error; + int i, retval, prot_exec; + Error *err = NULL; + + /* First of all, some simple consistency checks */ + if (!elf_check_ident(ehdr)) { + error_setg(&err, "Invalid ELF image for this architecture"); + goto exit_errmsg; + } + bswap_ehdr(ehdr); + if (!elf_check_ehdr(ehdr)) { + error_setg(&err, "Invalid ELF image for this architecture"); + goto exit_errmsg; + } + + i = ehdr->e_phnum * sizeof(struct elf_phdr); + if (ehdr->e_phoff + i <= BPRM_BUF_SIZE) { + phdr = (struct elf_phdr *)(bprm_buf + ehdr->e_phoff); + } else { + phdr = (struct elf_phdr *) alloca(i); + retval = pread(image_fd, phdr, i, ehdr->e_phoff); + if (retval != i) { + goto exit_read; + } + } + bswap_phdr(phdr, ehdr->e_phnum); + + info->nsegs = 0; + info->pt_dynamic_addr = 0; + + mmap_lock(); + + /* + * Find the maximum size of the image and allocate an appropriate + * amount of memory to handle that. Locate the interpreter, if any. + */ + loaddr = -1, hiaddr = 0; + info->alignment = 0; + for (i = 0; i < ehdr->e_phnum; ++i) { + struct elf_phdr *eppnt = phdr + i; + if (eppnt->p_type == PT_LOAD) { + abi_ulong a = eppnt->p_vaddr - eppnt->p_offset; + if (a < loaddr) { + loaddr = a; + } + a = eppnt->p_vaddr + eppnt->p_memsz; + if (a > hiaddr) { + hiaddr = a; + } + ++info->nsegs; + info->alignment |= eppnt->p_align; + } else if (eppnt->p_type == PT_INTERP && pinterp_name) { + g_autofree char *interp_name = NULL; + + if (*pinterp_name) { + error_setg(&err, "Multiple PT_INTERP entries"); + goto exit_errmsg; + } + + interp_name = g_malloc(eppnt->p_filesz); + + if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) { + memcpy(interp_name, bprm_buf + eppnt->p_offset, + eppnt->p_filesz); + } else { + retval = pread(image_fd, interp_name, eppnt->p_filesz, + eppnt->p_offset); + if (retval != eppnt->p_filesz) { + goto exit_read; + } + } + if (interp_name[eppnt->p_filesz - 1] != 0) { + error_setg(&err, "Invalid PT_INTERP entry"); + goto exit_errmsg; + } + *pinterp_name = g_steal_pointer(&interp_name); + } else if (eppnt->p_type == PT_GNU_PROPERTY) { + if (!parse_elf_properties(image_fd, info, eppnt, bprm_buf, &err)) { + goto exit_errmsg; + } + } + } + + if (pinterp_name != NULL) { + /* + * This is the main executable. + * + * Reserve extra space for brk. + * We hold on to this space while placing the interpreter + * and the stack, lest they be placed immediately after + * the data segment and block allocation from the brk. + * + * 16MB is chosen as "large enough" without being so large + * as to allow the result to not fit with a 32-bit guest on + * a 32-bit host. + */ + info->reserve_brk = 16 * MiB; + hiaddr += info->reserve_brk; + + if (ehdr->e_type == ET_EXEC) { + /* + * Make sure that the low address does not conflict with + * MMAP_MIN_ADDR or the QEMU application itself. + */ + probe_guest_base(image_name, loaddr, hiaddr); + } else { + /* + * The binary is dynamic, but we still need to + * select guest_base. In this case we pass a size. + */ + probe_guest_base(image_name, 0, hiaddr - loaddr); + } + } + + /* + * Reserve address space for all of this. + * + * In the case of ET_EXEC, we supply MAP_FIXED so that we get + * exactly the address range that is required. + * + * Otherwise this is ET_DYN, and we are searching for a location + * that can hold the memory space required. If the image is + * pre-linked, LOADDR will be non-zero, and the kernel should + * honor that address if it happens to be free. + * + * In both cases, we will overwrite pages in this range with mappings + * from the executable. + */ + load_addr = target_mmap(loaddr, hiaddr - loaddr, PROT_NONE, + MAP_PRIVATE | MAP_ANON | MAP_NORESERVE | + (ehdr->e_type == ET_EXEC ? MAP_FIXED : 0), + -1, 0); + if (load_addr == -1) { + goto exit_mmap; + } + load_bias = load_addr - loaddr; + + if (elf_is_fdpic(ehdr)) { + struct elf32_fdpic_loadseg *loadsegs = info->loadsegs = + g_malloc(sizeof(*loadsegs) * info->nsegs); + + for (i = 0; i < ehdr->e_phnum; ++i) { + switch (phdr[i].p_type) { + case PT_DYNAMIC: + info->pt_dynamic_addr = phdr[i].p_vaddr + load_bias; + break; + case PT_LOAD: + loadsegs->addr = phdr[i].p_vaddr + load_bias; + loadsegs->p_vaddr = phdr[i].p_vaddr; + loadsegs->p_memsz = phdr[i].p_memsz; + ++loadsegs; + break; + } + } + } + + info->load_bias = load_bias; + info->code_offset = load_bias; + info->data_offset = load_bias; + info->load_addr = load_addr; + info->entry = ehdr->e_entry + load_bias; + info->start_code = -1; + info->end_code = 0; + info->start_data = -1; + info->end_data = 0; + info->brk = 0; + info->elf_flags = ehdr->e_flags; + + prot_exec = PROT_EXEC; +#ifdef TARGET_AARCH64 + /* + * If the BTI feature is present, this indicates that the executable + * pages of the startup binary should be mapped with PROT_BTI, so that + * branch targets are enforced. + * + * The startup binary is either the interpreter or the static executable. + * The interpreter is responsible for all pages of a dynamic executable. + * + * Elf notes are backward compatible to older cpus. + * Do not enable BTI unless it is supported. + */ + if ((info->note_flags & GNU_PROPERTY_AARCH64_FEATURE_1_BTI) + && (pinterp_name == NULL || *pinterp_name == 0) + && cpu_isar_feature(aa64_bti, ARM_CPU(thread_cpu))) { + prot_exec |= TARGET_PROT_BTI; + } +#endif + + for (i = 0; i < ehdr->e_phnum; i++) { + struct elf_phdr *eppnt = phdr + i; + if (eppnt->p_type == PT_LOAD) { + abi_ulong vaddr, vaddr_po, vaddr_ps, vaddr_ef, vaddr_em, vaddr_len; + int elf_prot = 0; + + if (eppnt->p_flags & PF_R) { + elf_prot |= PROT_READ; + } + if (eppnt->p_flags & PF_W) { + elf_prot |= PROT_WRITE; + } + if (eppnt->p_flags & PF_X) { + elf_prot |= prot_exec; + } + + vaddr = load_bias + eppnt->p_vaddr; + vaddr_po = TARGET_ELF_PAGEOFFSET(vaddr); + vaddr_ps = TARGET_ELF_PAGESTART(vaddr); + + vaddr_ef = vaddr + eppnt->p_filesz; + vaddr_em = vaddr + eppnt->p_memsz; + + /* + * Some segments may be completely empty, with a non-zero p_memsz + * but no backing file segment. + */ + if (eppnt->p_filesz != 0) { + vaddr_len = TARGET_ELF_PAGELENGTH(eppnt->p_filesz + vaddr_po); + error = target_mmap(vaddr_ps, vaddr_len, elf_prot, + MAP_PRIVATE | MAP_FIXED, + image_fd, eppnt->p_offset - vaddr_po); + + if (error == -1) { + goto exit_mmap; + } + + /* + * If the load segment requests extra zeros (e.g. bss), map it. + */ + if (eppnt->p_filesz < eppnt->p_memsz) { + zero_bss(vaddr_ef, vaddr_em, elf_prot); + } + } else if (eppnt->p_memsz != 0) { + vaddr_len = TARGET_ELF_PAGELENGTH(eppnt->p_memsz + vaddr_po); + error = target_mmap(vaddr_ps, vaddr_len, elf_prot, + MAP_PRIVATE | MAP_FIXED | MAP_ANONYMOUS, + -1, 0); + + if (error == -1) { + goto exit_mmap; + } + } + + /* Find the full program boundaries. */ + if (elf_prot & PROT_EXEC) { + if (vaddr < info->start_code) { + info->start_code = vaddr; + } + if (vaddr_ef > info->end_code) { + info->end_code = vaddr_ef; + } + } + if (elf_prot & PROT_WRITE) { + if (vaddr < info->start_data) { + info->start_data = vaddr; + } + if (vaddr_ef > info->end_data) { + info->end_data = vaddr_ef; + } + } + if (vaddr_em > info->brk) { + info->brk = vaddr_em; + } +#ifdef TARGET_MIPS + } else if (eppnt->p_type == PT_MIPS_ABIFLAGS) { + Mips_elf_abiflags_v0 abiflags; + if (eppnt->p_filesz < sizeof(Mips_elf_abiflags_v0)) { + error_setg(&err, "Invalid PT_MIPS_ABIFLAGS entry"); + goto exit_errmsg; + } + if (eppnt->p_offset + eppnt->p_filesz <= BPRM_BUF_SIZE) { + memcpy(&abiflags, bprm_buf + eppnt->p_offset, + sizeof(Mips_elf_abiflags_v0)); + } else { + retval = pread(image_fd, &abiflags, sizeof(Mips_elf_abiflags_v0), + eppnt->p_offset); + if (retval != sizeof(Mips_elf_abiflags_v0)) { + goto exit_read; + } + } + bswap_mips_abiflags(&abiflags); + info->fp_abi = abiflags.fp_abi; +#endif + } + } + + if (info->end_data == 0) { + info->start_data = info->end_code; + info->end_data = info->end_code; + } + + if (qemu_log_enabled()) { + load_symbols(ehdr, image_fd, load_bias); + } + + mmap_unlock(); + + close(image_fd); + return; + + exit_read: + if (retval >= 0) { + error_setg(&err, "Incomplete read of file header"); + } else { + error_setg_errno(&err, errno, "Error reading file header"); + } + goto exit_errmsg; + exit_mmap: + error_setg_errno(&err, errno, "Error mapping file"); + goto exit_errmsg; + exit_errmsg: + error_reportf_err(err, "%s: ", image_name); + exit(-1); +} + +static void load_elf_interp(const char *filename, struct image_info *info, + char bprm_buf[BPRM_BUF_SIZE]) +{ + int fd, retval; + Error *err = NULL; + + fd = open(path(filename), O_RDONLY); + if (fd < 0) { + error_setg_file_open(&err, errno, filename); + error_report_err(err); + exit(-1); + } + + retval = read(fd, bprm_buf, BPRM_BUF_SIZE); + if (retval < 0) { + error_setg_errno(&err, errno, "Error reading file header"); + error_reportf_err(err, "%s: ", filename); + exit(-1); + } + + if (retval < BPRM_BUF_SIZE) { + memset(bprm_buf + retval, 0, BPRM_BUF_SIZE - retval); + } + + load_elf_image(filename, fd, info, NULL, bprm_buf); +} + +static int symfind(const void *s0, const void *s1) +{ + target_ulong addr = *(target_ulong *)s0; + struct elf_sym *sym = (struct elf_sym *)s1; + int result = 0; + if (addr < sym->st_value) { + result = -1; + } else if (addr >= sym->st_value + sym->st_size) { + result = 1; + } + return result; +} + +static const char *lookup_symbolxx(struct syminfo *s, target_ulong orig_addr) +{ +#if ELF_CLASS == ELFCLASS32 + struct elf_sym *syms = s->disas_symtab.elf32; +#else + struct elf_sym *syms = s->disas_symtab.elf64; +#endif + + // binary search + struct elf_sym *sym; + + sym = bsearch(&orig_addr, syms, s->disas_num_syms, sizeof(*syms), symfind); + if (sym != NULL) { + return s->disas_strtab + sym->st_name; + } + + return ""; +} + +/* FIXME: This should use elf_ops.h */ +static int symcmp(const void *s0, const void *s1) +{ + struct elf_sym *sym0 = (struct elf_sym *)s0; + struct elf_sym *sym1 = (struct elf_sym *)s1; + return (sym0->st_value < sym1->st_value) + ? -1 + : ((sym0->st_value > sym1->st_value) ? 1 : 0); +} + +/* Best attempt to load symbols from this ELF object. */ +static void load_symbols(struct elfhdr *hdr, int fd, abi_ulong load_bias) +{ + int i, shnum, nsyms, sym_idx = 0, str_idx = 0; + uint64_t segsz; + struct elf_shdr *shdr; + char *strings = NULL; + struct syminfo *s = NULL; + struct elf_sym *new_syms, *syms = NULL; + + shnum = hdr->e_shnum; + i = shnum * sizeof(struct elf_shdr); + shdr = (struct elf_shdr *)alloca(i); + if (pread(fd, shdr, i, hdr->e_shoff) != i) { + return; + } + + bswap_shdr(shdr, shnum); + for (i = 0; i < shnum; ++i) { + if (shdr[i].sh_type == SHT_SYMTAB) { + sym_idx = i; + str_idx = shdr[i].sh_link; + goto found; + } + } + + /* There will be no symbol table if the file was stripped. */ + return; + + found: + /* Now know where the strtab and symtab are. Snarf them. */ + s = g_try_new(struct syminfo, 1); + if (!s) { + goto give_up; + } + + segsz = shdr[str_idx].sh_size; + s->disas_strtab = strings = g_try_malloc(segsz); + if (!strings || + pread(fd, strings, segsz, shdr[str_idx].sh_offset) != segsz) { + goto give_up; + } + + segsz = shdr[sym_idx].sh_size; + syms = g_try_malloc(segsz); + if (!syms || pread(fd, syms, segsz, shdr[sym_idx].sh_offset) != segsz) { + goto give_up; + } + + if (segsz / sizeof(struct elf_sym) > INT_MAX) { + /* Implausibly large symbol table: give up rather than ploughing + * on with the number of symbols calculation overflowing + */ + goto give_up; + } + nsyms = segsz / sizeof(struct elf_sym); + for (i = 0; i < nsyms; ) { + bswap_sym(syms + i); + /* Throw away entries which we do not need. */ + if (syms[i].st_shndx == SHN_UNDEF + || syms[i].st_shndx >= SHN_LORESERVE + || ELF_ST_TYPE(syms[i].st_info) != STT_FUNC) { + if (i < --nsyms) { + syms[i] = syms[nsyms]; + } + } else { +#if defined(TARGET_ARM) || defined (TARGET_MIPS) + /* The bottom address bit marks a Thumb or MIPS16 symbol. */ + syms[i].st_value &= ~(target_ulong)1; +#endif + syms[i].st_value += load_bias; + i++; + } + } + + /* No "useful" symbol. */ + if (nsyms == 0) { + goto give_up; + } + + /* Attempt to free the storage associated with the local symbols + that we threw away. Whether or not this has any effect on the + memory allocation depends on the malloc implementation and how + many symbols we managed to discard. */ + new_syms = g_try_renew(struct elf_sym, syms, nsyms); + if (new_syms == NULL) { + goto give_up; + } + syms = new_syms; + + qsort(syms, nsyms, sizeof(*syms), symcmp); + + s->disas_num_syms = nsyms; +#if ELF_CLASS == ELFCLASS32 + s->disas_symtab.elf32 = syms; +#else + s->disas_symtab.elf64 = syms; +#endif + s->lookup_symbol = lookup_symbolxx; + s->next = syminfos; + syminfos = s; + + return; + +give_up: + g_free(s); + g_free(strings); + g_free(syms); +} + +uint32_t get_elf_eflags(int fd) +{ + struct elfhdr ehdr; + off_t offset; + int ret; + + /* Read ELF header */ + offset = lseek(fd, 0, SEEK_SET); + if (offset == (off_t) -1) { + return 0; + } + ret = read(fd, &ehdr, sizeof(ehdr)); + if (ret < sizeof(ehdr)) { + return 0; + } + offset = lseek(fd, offset, SEEK_SET); + if (offset == (off_t) -1) { + return 0; + } + + /* Check ELF signature */ + if (!elf_check_ident(&ehdr)) { + return 0; + } + + /* check header */ + bswap_ehdr(&ehdr); + if (!elf_check_ehdr(&ehdr)) { + return 0; + } + + /* return architecture id */ + return ehdr.e_flags; +} + +int load_elf_binary(struct linux_binprm *bprm, struct image_info *info) +{ + struct image_info interp_info; + struct elfhdr elf_ex; + char *elf_interpreter = NULL; + char *scratch; + + memset(&interp_info, 0, sizeof(interp_info)); +#ifdef TARGET_MIPS + interp_info.fp_abi = MIPS_ABI_FP_UNKNOWN; +#endif + + info->start_mmap = (abi_ulong)ELF_START_MMAP; + + load_elf_image(bprm->filename, bprm->fd, info, + &elf_interpreter, bprm->buf); + + /* ??? We need a copy of the elf header for passing to create_elf_tables. + If we do nothing, we'll have overwritten this when we re-use bprm->buf + when we load the interpreter. */ + elf_ex = *(struct elfhdr *)bprm->buf; + + /* Do this so that we can load the interpreter, if need be. We will + change some of these later */ + bprm->p = setup_arg_pages(bprm, info); + + scratch = g_new0(char, TARGET_PAGE_SIZE); + if (STACK_GROWS_DOWN) { + bprm->p = copy_elf_strings(1, &bprm->filename, scratch, + bprm->p, info->stack_limit); + info->file_string = bprm->p; + bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch, + bprm->p, info->stack_limit); + info->env_strings = bprm->p; + bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch, + bprm->p, info->stack_limit); + info->arg_strings = bprm->p; + } else { + info->arg_strings = bprm->p; + bprm->p = copy_elf_strings(bprm->argc, bprm->argv, scratch, + bprm->p, info->stack_limit); + info->env_strings = bprm->p; + bprm->p = copy_elf_strings(bprm->envc, bprm->envp, scratch, + bprm->p, info->stack_limit); + info->file_string = bprm->p; + bprm->p = copy_elf_strings(1, &bprm->filename, scratch, + bprm->p, info->stack_limit); + } + + g_free(scratch); + + if (!bprm->p) { + fprintf(stderr, "%s: %s\n", bprm->filename, strerror(E2BIG)); + exit(-1); + } + + if (elf_interpreter) { + load_elf_interp(elf_interpreter, &interp_info, bprm->buf); + + /* If the program interpreter is one of these two, then assume + an iBCS2 image. Otherwise assume a native linux image. */ + + if (strcmp(elf_interpreter, "/usr/lib/libc.so.1") == 0 + || strcmp(elf_interpreter, "/usr/lib/ld.so.1") == 0) { + info->personality = PER_SVR4; + + /* Why this, you ask??? Well SVr4 maps page 0 as read-only, + and some applications "depend" upon this behavior. Since + we do not have the power to recompile these, we emulate + the SVr4 behavior. Sigh. */ + target_mmap(0, qemu_host_page_size, PROT_READ | PROT_EXEC, + MAP_FIXED | MAP_PRIVATE | MAP_ANONYMOUS, -1, 0); + } +#ifdef TARGET_MIPS + info->interp_fp_abi = interp_info.fp_abi; +#endif + } + + /* + * TODO: load a vdso, which would also contain the signal trampolines. + * Otherwise, allocate a private page to hold them. + */ + if (TARGET_ARCH_HAS_SIGTRAMP_PAGE) { + abi_long tramp_page = target_mmap(0, TARGET_PAGE_SIZE, + PROT_READ | PROT_WRITE, + MAP_PRIVATE | MAP_ANON, -1, 0); + if (tramp_page == -1) { + return -errno; + } + + setup_sigtramp(tramp_page); + target_mprotect(tramp_page, TARGET_PAGE_SIZE, PROT_READ | PROT_EXEC); + } + + bprm->p = create_elf_tables(bprm->p, bprm->argc, bprm->envc, &elf_ex, + info, (elf_interpreter ? &interp_info : NULL)); + info->start_stack = bprm->p; + + /* If we have an interpreter, set that as the program's entry point. + Copy the load_bias as well, to help PPC64 interpret the entry + point as a function descriptor. Do this after creating elf tables + so that we copy the original program entry point into the AUXV. */ + if (elf_interpreter) { + info->load_bias = interp_info.load_bias; + info->entry = interp_info.entry; + g_free(elf_interpreter); + } + +#ifdef USE_ELF_CORE_DUMP + bprm->core_dump = &elf_core_dump; +#endif + + /* + * If we reserved extra space for brk, release it now. + * The implementation of do_brk in syscalls.c expects to be able + * to mmap pages in this space. + */ + if (info->reserve_brk) { + abi_ulong start_brk = HOST_PAGE_ALIGN(info->brk); + abi_ulong end_brk = HOST_PAGE_ALIGN(info->brk + info->reserve_brk); + target_munmap(start_brk, end_brk - start_brk); + } + + return 0; +} + +#ifdef USE_ELF_CORE_DUMP +/* + * Definitions to generate Intel SVR4-like core files. + * These mostly have the same names as the SVR4 types with "target_elf_" + * tacked on the front to prevent clashes with linux definitions, + * and the typedef forms have been avoided. This is mostly like + * the SVR4 structure, but more Linuxy, with things that Linux does + * not support and which gdb doesn't really use excluded. + * + * Fields we don't dump (their contents is zero) in linux-user qemu + * are marked with XXX. + * + * Core dump code is copied from linux kernel (fs/binfmt_elf.c). + * + * Porting ELF coredump for target is (quite) simple process. First you + * define USE_ELF_CORE_DUMP in target ELF code (where init_thread() for + * the target resides): + * + * #define USE_ELF_CORE_DUMP + * + * Next you define type of register set used for dumping. ELF specification + * says that it needs to be array of elf_greg_t that has size of ELF_NREG. + * + * typedef <target_regtype> target_elf_greg_t; + * #define ELF_NREG <number of registers> + * typedef taret_elf_greg_t target_elf_gregset_t[ELF_NREG]; + * + * Last step is to implement target specific function that copies registers + * from given cpu into just specified register set. Prototype is: + * + * static void elf_core_copy_regs(taret_elf_gregset_t *regs, + * const CPUArchState *env); + * + * Parameters: + * regs - copy register values into here (allocated and zeroed by caller) + * env - copy registers from here + * + * Example for ARM target is provided in this file. + */ + +/* An ELF note in memory */ +struct memelfnote { + const char *name; + size_t namesz; + size_t namesz_rounded; + int type; + size_t datasz; + size_t datasz_rounded; + void *data; + size_t notesz; +}; + +struct target_elf_siginfo { + abi_int si_signo; /* signal number */ + abi_int si_code; /* extra code */ + abi_int si_errno; /* errno */ +}; + +struct target_elf_prstatus { + struct target_elf_siginfo pr_info; /* Info associated with signal */ + abi_short pr_cursig; /* Current signal */ + abi_ulong pr_sigpend; /* XXX */ + abi_ulong pr_sighold; /* XXX */ + target_pid_t pr_pid; + target_pid_t pr_ppid; + target_pid_t pr_pgrp; + target_pid_t pr_sid; + struct target_timeval pr_utime; /* XXX User time */ + struct target_timeval pr_stime; /* XXX System time */ + struct target_timeval pr_cutime; /* XXX Cumulative user time */ + struct target_timeval pr_cstime; /* XXX Cumulative system time */ + target_elf_gregset_t pr_reg; /* GP registers */ + abi_int pr_fpvalid; /* XXX */ +}; + +#define ELF_PRARGSZ (80) /* Number of chars for args */ + +struct target_elf_prpsinfo { + char pr_state; /* numeric process state */ + char pr_sname; /* char for pr_state */ + char pr_zomb; /* zombie */ + char pr_nice; /* nice val */ + abi_ulong pr_flag; /* flags */ + target_uid_t pr_uid; + target_gid_t pr_gid; + target_pid_t pr_pid, pr_ppid, pr_pgrp, pr_sid; + /* Lots missing */ + char pr_fname[16] QEMU_NONSTRING; /* filename of executable */ + char pr_psargs[ELF_PRARGSZ]; /* initial part of arg list */ +}; + +/* Here is the structure in which status of each thread is captured. */ +struct elf_thread_status { + QTAILQ_ENTRY(elf_thread_status) ets_link; + struct target_elf_prstatus prstatus; /* NT_PRSTATUS */ +#if 0 + elf_fpregset_t fpu; /* NT_PRFPREG */ + struct task_struct *thread; + elf_fpxregset_t xfpu; /* ELF_CORE_XFPREG_TYPE */ +#endif + struct memelfnote notes[1]; + int num_notes; +}; + +struct elf_note_info { + struct memelfnote *notes; + struct target_elf_prstatus *prstatus; /* NT_PRSTATUS */ + struct target_elf_prpsinfo *psinfo; /* NT_PRPSINFO */ + + QTAILQ_HEAD(, elf_thread_status) thread_list; +#if 0 + /* + * Current version of ELF coredump doesn't support + * dumping fp regs etc. + */ + elf_fpregset_t *fpu; + elf_fpxregset_t *xfpu; + int thread_status_size; +#endif + int notes_size; + int numnote; +}; + +struct vm_area_struct { + target_ulong vma_start; /* start vaddr of memory region */ + target_ulong vma_end; /* end vaddr of memory region */ + abi_ulong vma_flags; /* protection etc. flags for the region */ + QTAILQ_ENTRY(vm_area_struct) vma_link; +}; + +struct mm_struct { + QTAILQ_HEAD(, vm_area_struct) mm_mmap; + int mm_count; /* number of mappings */ +}; + +static struct mm_struct *vma_init(void); +static void vma_delete(struct mm_struct *); +static int vma_add_mapping(struct mm_struct *, target_ulong, + target_ulong, abi_ulong); +static int vma_get_mapping_count(const struct mm_struct *); +static struct vm_area_struct *vma_first(const struct mm_struct *); +static struct vm_area_struct *vma_next(struct vm_area_struct *); +static abi_ulong vma_dump_size(const struct vm_area_struct *); +static int vma_walker(void *priv, target_ulong start, target_ulong end, + unsigned long flags); + +static void fill_elf_header(struct elfhdr *, int, uint16_t, uint32_t); +static void fill_note(struct memelfnote *, const char *, int, + unsigned int, void *); +static void fill_prstatus(struct target_elf_prstatus *, const TaskState *, int); +static int fill_psinfo(struct target_elf_prpsinfo *, const TaskState *); +static void fill_auxv_note(struct memelfnote *, const TaskState *); +static void fill_elf_note_phdr(struct elf_phdr *, int, off_t); +static size_t note_size(const struct memelfnote *); +static void free_note_info(struct elf_note_info *); +static int fill_note_info(struct elf_note_info *, long, const CPUArchState *); +static void fill_thread_info(struct elf_note_info *, const CPUArchState *); + +static int dump_write(int, const void *, size_t); +static int write_note(struct memelfnote *, int); +static int write_note_info(struct elf_note_info *, int); + +#ifdef BSWAP_NEEDED +static void bswap_prstatus(struct target_elf_prstatus *prstatus) +{ + prstatus->pr_info.si_signo = tswap32(prstatus->pr_info.si_signo); + prstatus->pr_info.si_code = tswap32(prstatus->pr_info.si_code); + prstatus->pr_info.si_errno = tswap32(prstatus->pr_info.si_errno); + prstatus->pr_cursig = tswap16(prstatus->pr_cursig); + prstatus->pr_sigpend = tswapal(prstatus->pr_sigpend); + prstatus->pr_sighold = tswapal(prstatus->pr_sighold); + prstatus->pr_pid = tswap32(prstatus->pr_pid); + prstatus->pr_ppid = tswap32(prstatus->pr_ppid); + prstatus->pr_pgrp = tswap32(prstatus->pr_pgrp); + prstatus->pr_sid = tswap32(prstatus->pr_sid); + /* cpu times are not filled, so we skip them */ + /* regs should be in correct format already */ + prstatus->pr_fpvalid = tswap32(prstatus->pr_fpvalid); +} + +static void bswap_psinfo(struct target_elf_prpsinfo *psinfo) +{ + psinfo->pr_flag = tswapal(psinfo->pr_flag); + psinfo->pr_uid = tswap16(psinfo->pr_uid); + psinfo->pr_gid = tswap16(psinfo->pr_gid); + psinfo->pr_pid = tswap32(psinfo->pr_pid); + psinfo->pr_ppid = tswap32(psinfo->pr_ppid); + psinfo->pr_pgrp = tswap32(psinfo->pr_pgrp); + psinfo->pr_sid = tswap32(psinfo->pr_sid); +} + +static void bswap_note(struct elf_note *en) +{ + bswap32s(&en->n_namesz); + bswap32s(&en->n_descsz); + bswap32s(&en->n_type); +} +#else +static inline void bswap_prstatus(struct target_elf_prstatus *p) { } +static inline void bswap_psinfo(struct target_elf_prpsinfo *p) {} +static inline void bswap_note(struct elf_note *en) { } +#endif /* BSWAP_NEEDED */ + +/* + * Minimal support for linux memory regions. These are needed + * when we are finding out what memory exactly belongs to + * emulated process. No locks needed here, as long as + * thread that received the signal is stopped. + */ + +static struct mm_struct *vma_init(void) +{ + struct mm_struct *mm; + + if ((mm = g_malloc(sizeof (*mm))) == NULL) + return (NULL); + + mm->mm_count = 0; + QTAILQ_INIT(&mm->mm_mmap); + + return (mm); +} + +static void vma_delete(struct mm_struct *mm) +{ + struct vm_area_struct *vma; + + while ((vma = vma_first(mm)) != NULL) { + QTAILQ_REMOVE(&mm->mm_mmap, vma, vma_link); + g_free(vma); + } + g_free(mm); +} + +static int vma_add_mapping(struct mm_struct *mm, target_ulong start, + target_ulong end, abi_ulong flags) +{ + struct vm_area_struct *vma; + + if ((vma = g_malloc0(sizeof (*vma))) == NULL) + return (-1); + + vma->vma_start = start; + vma->vma_end = end; + vma->vma_flags = flags; + + QTAILQ_INSERT_TAIL(&mm->mm_mmap, vma, vma_link); + mm->mm_count++; + + return (0); +} + +static struct vm_area_struct *vma_first(const struct mm_struct *mm) +{ + return (QTAILQ_FIRST(&mm->mm_mmap)); +} + +static struct vm_area_struct *vma_next(struct vm_area_struct *vma) +{ + return (QTAILQ_NEXT(vma, vma_link)); +} + +static int vma_get_mapping_count(const struct mm_struct *mm) +{ + return (mm->mm_count); +} + +/* + * Calculate file (dump) size of given memory region. + */ +static abi_ulong vma_dump_size(const struct vm_area_struct *vma) +{ + /* if we cannot even read the first page, skip it */ + if (!access_ok_untagged(VERIFY_READ, vma->vma_start, TARGET_PAGE_SIZE)) + return (0); + + /* + * Usually we don't dump executable pages as they contain + * non-writable code that debugger can read directly from + * target library etc. However, thread stacks are marked + * also executable so we read in first page of given region + * and check whether it contains elf header. If there is + * no elf header, we dump it. + */ + if (vma->vma_flags & PROT_EXEC) { + char page[TARGET_PAGE_SIZE]; + + if (copy_from_user(page, vma->vma_start, sizeof (page))) { + return 0; + } + if ((page[EI_MAG0] == ELFMAG0) && + (page[EI_MAG1] == ELFMAG1) && + (page[EI_MAG2] == ELFMAG2) && + (page[EI_MAG3] == ELFMAG3)) { + /* + * Mappings are possibly from ELF binary. Don't dump + * them. + */ + return (0); + } + } + + return (vma->vma_end - vma->vma_start); +} + +static int vma_walker(void *priv, target_ulong start, target_ulong end, + unsigned long flags) +{ + struct mm_struct *mm = (struct mm_struct *)priv; + + vma_add_mapping(mm, start, end, flags); + return (0); +} + +static void fill_note(struct memelfnote *note, const char *name, int type, + unsigned int sz, void *data) +{ + unsigned int namesz; + + namesz = strlen(name) + 1; + note->name = name; + note->namesz = namesz; + note->namesz_rounded = roundup(namesz, sizeof (int32_t)); + note->type = type; + note->datasz = sz; + note->datasz_rounded = roundup(sz, sizeof (int32_t)); + + note->data = data; + + /* + * We calculate rounded up note size here as specified by + * ELF document. + */ + note->notesz = sizeof (struct elf_note) + + note->namesz_rounded + note->datasz_rounded; +} + +static void fill_elf_header(struct elfhdr *elf, int segs, uint16_t machine, + uint32_t flags) +{ + (void) memset(elf, 0, sizeof(*elf)); + + (void) memcpy(elf->e_ident, ELFMAG, SELFMAG); + elf->e_ident[EI_CLASS] = ELF_CLASS; + elf->e_ident[EI_DATA] = ELF_DATA; + elf->e_ident[EI_VERSION] = EV_CURRENT; + elf->e_ident[EI_OSABI] = ELF_OSABI; + + elf->e_type = ET_CORE; + elf->e_machine = machine; + elf->e_version = EV_CURRENT; + elf->e_phoff = sizeof(struct elfhdr); + elf->e_flags = flags; + elf->e_ehsize = sizeof(struct elfhdr); + elf->e_phentsize = sizeof(struct elf_phdr); + elf->e_phnum = segs; + + bswap_ehdr(elf); +} + +static void fill_elf_note_phdr(struct elf_phdr *phdr, int sz, off_t offset) +{ + phdr->p_type = PT_NOTE; + phdr->p_offset = offset; + phdr->p_vaddr = 0; + phdr->p_paddr = 0; + phdr->p_filesz = sz; + phdr->p_memsz = 0; + phdr->p_flags = 0; + phdr->p_align = 0; + + bswap_phdr(phdr, 1); +} + +static size_t note_size(const struct memelfnote *note) +{ + return (note->notesz); +} + +static void fill_prstatus(struct target_elf_prstatus *prstatus, + const TaskState *ts, int signr) +{ + (void) memset(prstatus, 0, sizeof (*prstatus)); + prstatus->pr_info.si_signo = prstatus->pr_cursig = signr; + prstatus->pr_pid = ts->ts_tid; + prstatus->pr_ppid = getppid(); + prstatus->pr_pgrp = getpgrp(); + prstatus->pr_sid = getsid(0); + + bswap_prstatus(prstatus); +} + +static int fill_psinfo(struct target_elf_prpsinfo *psinfo, const TaskState *ts) +{ + char *base_filename; + unsigned int i, len; + + (void) memset(psinfo, 0, sizeof (*psinfo)); + + len = ts->info->env_strings - ts->info->arg_strings; + if (len >= ELF_PRARGSZ) + len = ELF_PRARGSZ - 1; + if (copy_from_user(&psinfo->pr_psargs, ts->info->arg_strings, len)) { + return -EFAULT; + } + for (i = 0; i < len; i++) + if (psinfo->pr_psargs[i] == 0) + psinfo->pr_psargs[i] = ' '; + psinfo->pr_psargs[len] = 0; + + psinfo->pr_pid = getpid(); + psinfo->pr_ppid = getppid(); + psinfo->pr_pgrp = getpgrp(); + psinfo->pr_sid = getsid(0); + psinfo->pr_uid = getuid(); + psinfo->pr_gid = getgid(); + + base_filename = g_path_get_basename(ts->bprm->filename); + /* + * Using strncpy here is fine: at max-length, + * this field is not NUL-terminated. + */ + (void) strncpy(psinfo->pr_fname, base_filename, + sizeof(psinfo->pr_fname)); + + g_free(base_filename); + bswap_psinfo(psinfo); + return (0); +} + +static void fill_auxv_note(struct memelfnote *note, const TaskState *ts) +{ + elf_addr_t auxv = (elf_addr_t)ts->info->saved_auxv; + elf_addr_t orig_auxv = auxv; + void *ptr; + int len = ts->info->auxv_len; + + /* + * Auxiliary vector is stored in target process stack. It contains + * {type, value} pairs that we need to dump into note. This is not + * strictly necessary but we do it here for sake of completeness. + */ + + /* read in whole auxv vector and copy it to memelfnote */ + ptr = lock_user(VERIFY_READ, orig_auxv, len, 0); + if (ptr != NULL) { + fill_note(note, "CORE", NT_AUXV, len, ptr); + unlock_user(ptr, auxv, len); + } +} + +/* + * Constructs name of coredump file. We have following convention + * for the name: + * qemu_<basename-of-target-binary>_<date>-<time>_<pid>.core + * + * Returns the filename + */ +static char *core_dump_filename(const TaskState *ts) +{ + g_autoptr(GDateTime) now = g_date_time_new_now_local(); + g_autofree char *nowstr = g_date_time_format(now, "%Y%m%d-%H%M%S"); + g_autofree char *base_filename = g_path_get_basename(ts->bprm->filename); + + return g_strdup_printf("qemu_%s_%s_%d.core", + base_filename, nowstr, (int)getpid()); +} + +static int dump_write(int fd, const void *ptr, size_t size) +{ + const char *bufp = (const char *)ptr; + ssize_t bytes_written, bytes_left; + struct rlimit dumpsize; + off_t pos; + + bytes_written = 0; + getrlimit(RLIMIT_CORE, &dumpsize); + if ((pos = lseek(fd, 0, SEEK_CUR))==-1) { + if (errno == ESPIPE) { /* not a seekable stream */ + bytes_left = size; + } else { + return pos; + } + } else { + if (dumpsize.rlim_cur <= pos) { + return -1; + } else if (dumpsize.rlim_cur == RLIM_INFINITY) { + bytes_left = size; + } else { + size_t limit_left=dumpsize.rlim_cur - pos; + bytes_left = limit_left >= size ? size : limit_left ; + } + } + + /* + * In normal conditions, single write(2) should do but + * in case of socket etc. this mechanism is more portable. + */ + do { + bytes_written = write(fd, bufp, bytes_left); + if (bytes_written < 0) { + if (errno == EINTR) + continue; + return (-1); + } else if (bytes_written == 0) { /* eof */ + return (-1); + } + bufp += bytes_written; + bytes_left -= bytes_written; + } while (bytes_left > 0); + + return (0); +} + +static int write_note(struct memelfnote *men, int fd) +{ + struct elf_note en; + + en.n_namesz = men->namesz; + en.n_type = men->type; + en.n_descsz = men->datasz; + + bswap_note(&en); + + if (dump_write(fd, &en, sizeof(en)) != 0) + return (-1); + if (dump_write(fd, men->name, men->namesz_rounded) != 0) + return (-1); + if (dump_write(fd, men->data, men->datasz_rounded) != 0) + return (-1); + + return (0); +} + +static void fill_thread_info(struct elf_note_info *info, const CPUArchState *env) +{ + CPUState *cpu = env_cpu((CPUArchState *)env); + TaskState *ts = (TaskState *)cpu->opaque; + struct elf_thread_status *ets; + + ets = g_malloc0(sizeof (*ets)); + ets->num_notes = 1; /* only prstatus is dumped */ + fill_prstatus(&ets->prstatus, ts, 0); + elf_core_copy_regs(&ets->prstatus.pr_reg, env); + fill_note(&ets->notes[0], "CORE", NT_PRSTATUS, sizeof (ets->prstatus), + &ets->prstatus); + + QTAILQ_INSERT_TAIL(&info->thread_list, ets, ets_link); + + info->notes_size += note_size(&ets->notes[0]); +} + +static void init_note_info(struct elf_note_info *info) +{ + /* Initialize the elf_note_info structure so that it is at + * least safe to call free_note_info() on it. Must be + * called before calling fill_note_info(). + */ + memset(info, 0, sizeof (*info)); + QTAILQ_INIT(&info->thread_list); +} + +static int fill_note_info(struct elf_note_info *info, + long signr, const CPUArchState *env) +{ +#define NUMNOTES 3 + CPUState *cpu = env_cpu((CPUArchState *)env); + TaskState *ts = (TaskState *)cpu->opaque; + int i; + + info->notes = g_new0(struct memelfnote, NUMNOTES); + if (info->notes == NULL) + return (-ENOMEM); + info->prstatus = g_malloc0(sizeof (*info->prstatus)); + if (info->prstatus == NULL) + return (-ENOMEM); + info->psinfo = g_malloc0(sizeof (*info->psinfo)); + if (info->prstatus == NULL) + return (-ENOMEM); + + /* + * First fill in status (and registers) of current thread + * including process info & aux vector. + */ + fill_prstatus(info->prstatus, ts, signr); + elf_core_copy_regs(&info->prstatus->pr_reg, env); + fill_note(&info->notes[0], "CORE", NT_PRSTATUS, + sizeof (*info->prstatus), info->prstatus); + fill_psinfo(info->psinfo, ts); + fill_note(&info->notes[1], "CORE", NT_PRPSINFO, + sizeof (*info->psinfo), info->psinfo); + fill_auxv_note(&info->notes[2], ts); + info->numnote = 3; + + info->notes_size = 0; + for (i = 0; i < info->numnote; i++) + info->notes_size += note_size(&info->notes[i]); + + /* read and fill status of all threads */ + cpu_list_lock(); + CPU_FOREACH(cpu) { + if (cpu == thread_cpu) { + continue; + } + fill_thread_info(info, (CPUArchState *)cpu->env_ptr); + } + cpu_list_unlock(); + + return (0); +} + +static void free_note_info(struct elf_note_info *info) +{ + struct elf_thread_status *ets; + + while (!QTAILQ_EMPTY(&info->thread_list)) { + ets = QTAILQ_FIRST(&info->thread_list); + QTAILQ_REMOVE(&info->thread_list, ets, ets_link); + g_free(ets); + } + + g_free(info->prstatus); + g_free(info->psinfo); + g_free(info->notes); +} + +static int write_note_info(struct elf_note_info *info, int fd) +{ + struct elf_thread_status *ets; + int i, error = 0; + + /* write prstatus, psinfo and auxv for current thread */ + for (i = 0; i < info->numnote; i++) + if ((error = write_note(&info->notes[i], fd)) != 0) + return (error); + + /* write prstatus for each thread */ + QTAILQ_FOREACH(ets, &info->thread_list, ets_link) { + if ((error = write_note(&ets->notes[0], fd)) != 0) + return (error); + } + + return (0); +} + +/* + * Write out ELF coredump. + * + * See documentation of ELF object file format in: + * http://www.caldera.com/developers/devspecs/gabi41.pdf + * + * Coredump format in linux is following: + * + * 0 +----------------------+ \ + * | ELF header | ET_CORE | + * +----------------------+ | + * | ELF program headers | |--- headers + * | - NOTE section | | + * | - PT_LOAD sections | | + * +----------------------+ / + * | NOTEs: | + * | - NT_PRSTATUS | + * | - NT_PRSINFO | + * | - NT_AUXV | + * +----------------------+ <-- aligned to target page + * | Process memory dump | + * : : + * . . + * : : + * | | + * +----------------------+ + * + * NT_PRSTATUS -> struct elf_prstatus (per thread) + * NT_PRSINFO -> struct elf_prpsinfo + * NT_AUXV is array of { type, value } pairs (see fill_auxv_note()). + * + * Format follows System V format as close as possible. Current + * version limitations are as follows: + * - no floating point registers are dumped + * + * Function returns 0 in case of success, negative errno otherwise. + * + * TODO: make this work also during runtime: it should be + * possible to force coredump from running process and then + * continue processing. For example qemu could set up SIGUSR2 + * handler (provided that target process haven't registered + * handler for that) that does the dump when signal is received. + */ +static int elf_core_dump(int signr, const CPUArchState *env) +{ + const CPUState *cpu = env_cpu((CPUArchState *)env); + const TaskState *ts = (const TaskState *)cpu->opaque; + struct vm_area_struct *vma = NULL; + g_autofree char *corefile = NULL; + struct elf_note_info info; + struct elfhdr elf; + struct elf_phdr phdr; + struct rlimit dumpsize; + struct mm_struct *mm = NULL; + off_t offset = 0, data_offset = 0; + int segs = 0; + int fd = -1; + + init_note_info(&info); + + errno = 0; + getrlimit(RLIMIT_CORE, &dumpsize); + if (dumpsize.rlim_cur == 0) + return 0; + + corefile = core_dump_filename(ts); + + if ((fd = open(corefile, O_WRONLY | O_CREAT, + S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0) + return (-errno); + + /* + * Walk through target process memory mappings and + * set up structure containing this information. After + * this point vma_xxx functions can be used. + */ + if ((mm = vma_init()) == NULL) + goto out; + + walk_memory_regions(mm, vma_walker); + segs = vma_get_mapping_count(mm); + + /* + * Construct valid coredump ELF header. We also + * add one more segment for notes. + */ + fill_elf_header(&elf, segs + 1, ELF_MACHINE, 0); + if (dump_write(fd, &elf, sizeof (elf)) != 0) + goto out; + + /* fill in the in-memory version of notes */ + if (fill_note_info(&info, signr, env) < 0) + goto out; + + offset += sizeof (elf); /* elf header */ + offset += (segs + 1) * sizeof (struct elf_phdr); /* program headers */ + + /* write out notes program header */ + fill_elf_note_phdr(&phdr, info.notes_size, offset); + + offset += info.notes_size; + if (dump_write(fd, &phdr, sizeof (phdr)) != 0) + goto out; + + /* + * ELF specification wants data to start at page boundary so + * we align it here. + */ + data_offset = offset = roundup(offset, ELF_EXEC_PAGESIZE); + + /* + * Write program headers for memory regions mapped in + * the target process. + */ + for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { + (void) memset(&phdr, 0, sizeof (phdr)); + + phdr.p_type = PT_LOAD; + phdr.p_offset = offset; + phdr.p_vaddr = vma->vma_start; + phdr.p_paddr = 0; + phdr.p_filesz = vma_dump_size(vma); + offset += phdr.p_filesz; + phdr.p_memsz = vma->vma_end - vma->vma_start; + phdr.p_flags = vma->vma_flags & PROT_READ ? PF_R : 0; + if (vma->vma_flags & PROT_WRITE) + phdr.p_flags |= PF_W; + if (vma->vma_flags & PROT_EXEC) + phdr.p_flags |= PF_X; + phdr.p_align = ELF_EXEC_PAGESIZE; + + bswap_phdr(&phdr, 1); + if (dump_write(fd, &phdr, sizeof(phdr)) != 0) { + goto out; + } + } + + /* + * Next we write notes just after program headers. No + * alignment needed here. + */ + if (write_note_info(&info, fd) < 0) + goto out; + + /* align data to page boundary */ + if (lseek(fd, data_offset, SEEK_SET) != data_offset) + goto out; + + /* + * Finally we can dump process memory into corefile as well. + */ + for (vma = vma_first(mm); vma != NULL; vma = vma_next(vma)) { + abi_ulong addr; + abi_ulong end; + + end = vma->vma_start + vma_dump_size(vma); + + for (addr = vma->vma_start; addr < end; + addr += TARGET_PAGE_SIZE) { + char page[TARGET_PAGE_SIZE]; + int error; + + /* + * Read in page from target process memory and + * write it to coredump file. + */ + error = copy_from_user(page, addr, sizeof (page)); + if (error != 0) { + (void) fprintf(stderr, "unable to dump " TARGET_ABI_FMT_lx "\n", + addr); + errno = -error; + goto out; + } + if (dump_write(fd, page, TARGET_PAGE_SIZE) < 0) + goto out; + } + } + + out: + free_note_info(&info); + if (mm != NULL) + vma_delete(mm); + (void) close(fd); + + if (errno != 0) + return (-errno); + return (0); +} +#endif /* USE_ELF_CORE_DUMP */ + +void do_init_thread(struct target_pt_regs *regs, struct image_info *infop) +{ + init_thread(regs, infop); +} |