[MIPS]: Use mcontext_t structure for MIPS

This change removes user_regs_struct and
user_fpregs_struct structures for mips
and uses mcontext_t instead.

R=fdegans@chromium.org, mark@chromium.org, rmcilroy@chromium.org

Review URL: https://breakpad.appspot.com/3744002

Patch from Gordana Cmiljanovic <Gordana.Cmiljanovic@imgtec.com>.

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1452 4c0a9323-5329-0410-9bdc-e9ce6186880e

1 files changed, 32 insertions, 14 deletions

diff --git a/src/tools/linux/md2core/minidump-2-core.cc b/src/tools/linux/md2core/minidump-2-core.cc
index bcb0076e..21d410bc 100644
--- a/src/tools/linux/md2core/minidump-2-core.cc
+++ b/src/tools/linux/md2core/minidump-2-core.cc
@@ -81,6 +81,9 @@
 // containing core registers, while they use 'user_regs_struct' on other
 // architectures. This file-local typedef simplifies the source code.
 typedef user_regs user_regs_struct;
+#elif defined (__mips__)
+// This file-local typedef simplifies the source code.
+typedef gregset_t user_regs_struct;
 #endif
 
 using google_breakpad::MDTypeHelper;
@@ -208,13 +211,17 @@ struct CrashedProcess {
 
   struct Thread {
     pid_t tid;
+#if defined(__mips__)
+    mcontext_t mcontext;
+#else  // __mips__
     user_regs_struct regs;
-#if defined(__i386__) || defined(__x86_64__) || defined(__mips__)
+#if defined(__i386__) || defined(__x86_64__)
     user_fpregs_struct fpregs;
-#endif
+#endif  // __i386__ || __x86_64__
 #if defined(__i386__)
     user_fpxregs_struct fpxregs;
-#endif
+#endif  // __i386__
+#endif  // __mips__
     uintptr_t stack_addr;
     const uint8_t* stack;
     size_t stack_length;
@@ -371,21 +378,28 @@ ParseThreadRegisters(CrashedProcess::Thread* thread,
   const MDRawContextMIPS* rawregs = range.GetData<MDRawContextMIPS>(0);
 
   for (int i = 0; i < MD_CONTEXT_MIPS_GPR_COUNT; ++i)
-    thread->regs.regs[i] = rawregs->iregs[i];
+    thread->mcontext.gregs[i] = rawregs->iregs[i];
+
+  thread->mcontext.pc = rawregs->epc;
 
-  thread->regs.lo = rawregs->mdlo;
-  thread->regs.hi = rawregs->mdhi;
-  thread->regs.epc = rawregs->epc;
-  thread->regs.badvaddr = rawregs->badvaddr;
-  thread->regs.status = rawregs->status;
-  thread->regs.cause = rawregs->cause;
+  thread->mcontext.mdlo = rawregs->mdlo;
+  thread->mcontext.mdhi = rawregs->mdhi;
 
-  for (int i = 0; i < MD_FLOATINGSAVEAREA_MIPS_FPR_COUNT; ++i)
-    thread->fpregs.regs[i] = rawregs->float_save.regs[i];
+  thread->mcontext.hi1 = rawregs->hi[0];
+  thread->mcontext.lo1 = rawregs->lo[0];
+  thread->mcontext.hi2 = rawregs->hi[1];
+  thread->mcontext.lo2 = rawregs->lo[1];
+  thread->mcontext.hi3 = rawregs->hi[2];
+  thread->mcontext.lo3 = rawregs->lo[2];
 
-  thread->fpregs.fpcsr = rawregs->float_save.fpcsr;
+  for (int i = 0; i < MD_FLOATINGSAVEAREA_MIPS_FPR_COUNT; ++i) {
+    thread->mcontext.fpregs.fp_r.fp_fregs[i]._fp_fregs =
+        rawregs->float_save.regs[i];
+  }
+
+  thread->mcontext.fpc_csr = rawregs->float_save.fpcsr;
 #if _MIPS_SIM == _ABIO32
-  thread->fpregs.fir = rawregs->float_save.fir;
+  thread->mcontext.fpc_eir = rawregs->float_save.fir;
 #endif
 }
 #else
@@ -751,7 +765,11 @@ WriteThread(const CrashedProcess::Thread& thread, int fatal_signal) {
   pr.pr_info.si_signo = fatal_signal;
   pr.pr_cursig = fatal_signal;
   pr.pr_pid = thread.tid;
+#if defined(__mips__)
+  memcpy(&pr.pr_reg, &thread.mcontext.gregs, sizeof(user_regs_struct));
+#else
   memcpy(&pr.pr_reg, &thread.regs, sizeof(user_regs_struct));
+#endif
 
   Nhdr nhdr;
   memset(&nhdr, 0, sizeof(nhdr));