map the mcontext_t structure for musl

Upstream-Status: Inappropriate[need to consider Android]

Signed-off-by: Khem Raj <raj.khem@gmail.com>
Index: git/src/client/linux/dump_writer_common/thread_info.cc
===================================================================
--- git.orig/src/client/linux/dump_writer_common/thread_info.cc
+++ git/src/client/linux/dump_writer_common/thread_info.cc
@@ -229,7 +229,6 @@ void ThreadInfo::FillCPUContext(RawConte
 }
 
 #elif defined(__mips__)
-
 uintptr_t ThreadInfo::GetInstructionPointer() const {
   return mcontext.pc;
 }
@@ -263,8 +262,11 @@ void ThreadInfo::FillCPUContext(RawConte
   out->cause = 0; // Not stored in mcontext
 
   for (int i = 0; i < MD_FLOATINGSAVEAREA_MIPS_FPR_COUNT; ++i)
+#ifdef __GLIBC__
     out->float_save.regs[i] = mcontext.fpregs.fp_r.fp_fregs[i]._fp_fregs;
-
+#else
+    out->float_save.regs[i] = mcontext.fpregs[i];
+#endif
   out->float_save.fpcsr = mcontext.fpc_csr;
 #if _MIPS_SIM == _ABIO32
   out->float_save.fir = mcontext.fpc_eir;
Index: git/src/client/linux/dump_writer_common/ucontext_reader.cc
===================================================================
--- git.orig/src/client/linux/dump_writer_common/ucontext_reader.cc
+++ git/src/client/linux/dump_writer_common/ucontext_reader.cc
@@ -247,8 +247,11 @@ void UContextReader::FillCPUContext(RawC
   out->cause = 0;  // Not reported in signal context.
 
   for (int i = 0; i < MD_FLOATINGSAVEAREA_MIPS_FPR_COUNT; ++i)
+#ifdef __GLIBC__
     out->float_save.regs[i] = uc->uc_mcontext.fpregs.fp_r.fp_dregs[i];
-
+#else
+    out->float_save.regs[i] = uc->uc_mcontext.fpregs[i];
+#endif
   out->float_save.fpcsr = uc->uc_mcontext.fpc_csr;
 #if _MIPS_SIM == _ABIO32
   out->float_save.fir = uc->uc_mcontext.fpc_eir;  // Unused.
Index: git/src/client/linux/minidump_writer/linux_core_dumper.cc
===================================================================
--- git.orig/src/client/linux/minidump_writer/linux_core_dumper.cc
+++ git/src/client/linux/minidump_writer/linux_core_dumper.cc
@@ -196,7 +196,7 @@ bool LinuxCoreDumper::EnumerateThreads()
         info.tgid = status->pr_pgrp;
         info.ppid = status->pr_ppid;
 #if defined(__mips__)
-#if defined(__ANDROID__)
+#if defined(__ANDROID__) || !defined(__GLIBC__)
         for (int i = EF_R0; i <= EF_R31; i++)
           info.mcontext.gregs[i - EF_R0] = status->pr_reg[i];
 #else  // __ANDROID__
Index: git/src/tools/linux/md2core/minidump-2-core.cc
===================================================================
--- git.orig/src/tools/linux/md2core/minidump-2-core.cc
+++ git/src/tools/linux/md2core/minidump-2-core.cc
@@ -516,8 +516,12 @@ ParseThreadRegisters(CrashedProcess::Thr
   thread->mcontext.lo3 = rawregs->lo[2];
 
   for (int i = 0; i < MD_FLOATINGSAVEAREA_MIPS_FPR_COUNT; ++i) {
+#ifdef __GLIBC__
     thread->mcontext.fpregs.fp_r.fp_fregs[i]._fp_fregs =
         rawregs->float_save.regs[i];
+#else
+    thread->mcontext.fpregs[i] = rawregs->float_save.regs[i];
+#endif
   }
 
   thread->mcontext.fpc_csr = rawregs->float_save.fpcsr;