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/*
*
* <xcoff_load.c>
*
* XCOFF file loader
*
* Copyright (C) 2009 Laurent Vivier (Laurent@vivier.eu)
*
* from original XCOFF loader by Steven Noonan <steven@uplinklabs.net>
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* version 2
*
*/
#include "config.h"
#include "libopenbios/bindings.h"
#include "libopenbios/initprogram.h"
#include "libopenbios/xcoff_load.h"
#include "libc/diskio.h"
#include "arch/common/xcoff.h"
#ifdef CONFIG_PPC
extern void flush_icache_range( char *start, char *stop );
#endif
//#define DEBUG_XCOFF
#ifdef DEBUG_XCOFF
#define DPRINTF(fmt, args...) \
do { printk("%s: " fmt, __func__ , ##args); } while (0)
#else
#define DPRINTF(fmt, args...) \
do { } while (0)
#endif
int
is_xcoff(COFF_filehdr_t *fhdr)
{
return (fhdr->f_magic == U802WRMAGIC
|| fhdr->f_magic == U802ROMAGIC
|| fhdr->f_magic == U802TOCMAGIC
|| fhdr->f_magic == U802TOMAGIC);
}
int
xcoff_load(ihandle_t dev)
{
COFF_filehdr_t fhdr;
COFF_aouthdr_t ahdr;
COFF_scnhdr_t shdr;
uint32_t offset;
size_t total_size = 0;
int fd, i;
int retval = -1;
/* Mark the saved-program-state as invalid */
feval("0 state-valid !");
fd = open_ih(dev);
if (fd == -1) {
retval = LOADER_NOT_SUPPORT;
goto out;
}
for (offset = 0; offset < 16 * 512; offset += 512) {
seek_io(fd, offset);
if (read_io(fd, &fhdr, sizeof fhdr) != sizeof fhdr) {
DPRINTF("Can't read XCOFF header\n");
retval = LOADER_NOT_SUPPORT;
goto out;
}
if (is_xcoff(&fhdr))
break;
}
/* Is it executable ? */
if (fhdr.f_magic != 0x01DF &&
(fhdr.f_flags & COFF_F_EXEC) == 0) {
DPRINTF("Not an executable XCOFF file %02x\n", fhdr.f_flags);
return LOADER_NOT_SUPPORT;
}
/* Optional header is a.out ? */
if (fhdr.f_opthdr != sizeof(COFF_aouthdr_t)) {
DPRINTF("AOUT optional error size mismatch in XCOFF file\n");
return LOADER_NOT_SUPPORT;
}
seek_io(fd, sizeof(COFF_filehdr_t));
read_io(fd, &ahdr, sizeof(COFF_aouthdr_t));
/* check a.out magic number */
if (ahdr.magic != AOUT_MAGIC) {
DPRINTF("Invalid AOUT optional header\n");
return LOADER_NOT_SUPPORT;
}
offset = sizeof(COFF_filehdr_t) + sizeof(COFF_aouthdr_t);
DPRINTF("XCOFF file with %d sections\n", fhdr.f_nscns);
for (i = 0; i < fhdr.f_nscns; i++) {
DPRINTF("Read header at offset %0x\n", offset);
seek_io(fd, offset);
read_io(fd, &shdr, sizeof(COFF_scnhdr_t));
DPRINTF("Initializing '%s' section from %0x %0x to %0x (%0x)\n",
shdr.s_name, offset, shdr.s_scnptr,
shdr.s_vaddr, shdr.s_size);
if (strcmp(shdr.s_name, ".text") == 0) {
read_io(fd, (void *)shdr.s_vaddr, shdr.s_size);
total_size += shdr.s_size;
#ifdef CONFIG_PPC
flush_icache_range((char*)(uintptr_t)shdr.s_vaddr,
(char*)(uintptr_t)(shdr.s_vaddr + shdr.s_size));
#endif
} else if (strcmp(shdr.s_name, ".data") == 0) {
read_io(fd, (void *)shdr.s_vaddr, shdr.s_size);
total_size += shdr.s_size;
} else if (strcmp(shdr.s_name, ".bss") == 0) {
memset((void *)(uintptr_t)shdr.s_vaddr, 0, shdr.s_size);
total_size += shdr.s_size;
} else {
DPRINTF(" Skip '%s' section\n", shdr.s_name);
}
offset += sizeof(COFF_scnhdr_t);
}
DPRINTF("XCOFF entry point: %x\n", *(uint32_t*)ahdr.entry);
// Initialise load-state
PUSH(total_size);
feval("load-state >ls.file-size !");
feval("xcoff load-state >ls.file-type !");
out:
close_io(fd);
return retval;
}
void
xcoff_init_program(void)
{
char *base;
COFF_filehdr_t *fhdr;
COFF_aouthdr_t *ahdr;
COFF_scnhdr_t *shdr;
uint32_t offset;
size_t total_size = 0;
int i;
feval("load-base");
base = (char*)cell2pointer(POP());
fhdr = (COFF_filehdr_t*)base;
/* Is it an XCOFF file ? */
if (!is_xcoff(fhdr)) {
DPRINTF("Not a XCOFF file %02x\n", fhdr->f_magic);
return;
}
/* Is it executable ? */
if (fhdr->f_magic != 0x01DF &&
(fhdr->f_flags & COFF_F_EXEC) == 0) {
DPRINTF("Not an executable XCOFF file %02x\n", fhdr->f_flags);
return;
}
/* Optional header is a.out ? */
if (fhdr->f_opthdr != sizeof(COFF_aouthdr_t)) {
DPRINTF("AOUT optional error size mismatch in XCOFF file\n");
return;
}
ahdr = (COFF_aouthdr_t*)(base + sizeof(COFF_filehdr_t));
/* check a.out magic number */
if (ahdr->magic != AOUT_MAGIC) {
DPRINTF("Invalid AOUT optional header\n");
return;
}
offset = sizeof(COFF_filehdr_t) + sizeof(COFF_aouthdr_t);
DPRINTF("XCOFF file with %d sections\n", fhdr->f_nscns);
for (i = 0; i < fhdr->f_nscns; i++) {
DPRINTF("Read header at offset %0x\n", offset);
shdr = (COFF_scnhdr_t*)(base + offset);
DPRINTF("Initializing '%s' section from %0x %0x to %0x (%0x)\n",
shdr->s_name, offset, shdr->s_scnptr,
shdr->s_vaddr, shdr->s_size);
if (strcmp(shdr->s_name, ".text") == 0) {
memcpy((char*)(uintptr_t)shdr->s_vaddr, base + shdr->s_scnptr,
shdr->s_size);
total_size += shdr->s_size;
#ifdef CONFIG_PPC
flush_icache_range((char*)(uintptr_t)shdr->s_vaddr,
(char*)(uintptr_t)(shdr->s_vaddr + shdr->s_size));
#endif
} else if (strcmp(shdr->s_name, ".data") == 0) {
memcpy((char*)(uintptr_t)shdr->s_vaddr, base + shdr->s_scnptr,
shdr->s_size);
total_size += shdr->s_size;
} else if (strcmp(shdr->s_name, ".bss") == 0) {
memset((void *)(uintptr_t)shdr->s_vaddr, 0, shdr->s_size);
total_size += shdr->s_size;
} else {
DPRINTF(" Skip '%s' section\n", shdr->s_name);
}
offset += sizeof(COFF_scnhdr_t);
}
DPRINTF("XCOFF entry point: %x\n", *(uint32_t*)ahdr->entry);
// Initialise load-state
PUSH(*(uint32_t*)(uintptr_t)ahdr->entry);
feval("load-state >ls.entry !");
feval("xcoff load-state >ls.file-type !");
arch_init_program();
feval("-1 state-valid !");
}
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