commit 61b1a1ae7797e0d3177400cdb3cda028ea14669d
author Douglas Leung <douglas.leung@mips.com> Wed Nov 08 10:53:53 2017 +0100
committer Dejan Jovicevic <dejan.jovicevic@mips.com> Mon Dec 11 15:44:40 2017 +0100
tree 1d2d45484f749e3bb619de268e19380bc925e926
parent 84de4c0a892c922a79143248f00f2965c82b0903

Add libunwindstack support for Mips and Mips64

This patch requires v3.18 kernel or above, because v3.10 kernel
has a bug (as of 8/1/2017) in the ptrace(GETREGSET) function for mips
and mips64.

Change-Id: I004c1fa190193eebe1c84440b366289122a6bd8a
Signed-off-by: Douglas Leung <douglas.leung@mips.com>
Signed-off-by: Dejan Jovicevic <dejan.jovicevic@mips.com>

libunwindstack/Regs.cpp

diff --git a/libunwindstack/Regs.cpp b/libunwindstack/Regs.cpp
index 29dbf9d..7feafad 100644
--- a/libunwindstack/Regs.cpp
+++ b/libunwindstack/Regs.cpp
@@ -27,16 +27,20 @@
 #include <unwindstack/RegsArm64.h>
 #include <unwindstack/RegsX86.h>
 #include <unwindstack/RegsX86_64.h>
+#include <unwindstack/RegsMips.h>
+#include <unwindstack/RegsMips64.h>
 
 #include "UserArm.h"
 #include "UserArm64.h"
 #include "UserX86.h"
 #include "UserX86_64.h"
+#include "UserMips.h"
+#include "UserMips64.h"
 
 namespace unwindstack {
 
 // The largest user structure.
-constexpr size_t MAX_USER_REGS_SIZE = sizeof(arm64_user_regs) + 10;
+constexpr size_t MAX_USER_REGS_SIZE = sizeof(mips64_user_regs) + 10;
 
 // This function assumes that reg_data is already aligned to a 64 bit value.
 // If not this could crash with an unaligned access.
@@ -60,6 +64,10 @@
     return RegsArm::Read(buffer.data());
   case sizeof(arm64_user_regs):
     return RegsArm64::Read(buffer.data());
+  case sizeof(mips_user_regs):
+    return RegsMips::Read(buffer.data());
+  case sizeof(mips64_user_regs):
+    return RegsMips64::Read(buffer.data());
   }
   return nullptr;
 }
@@ -74,6 +82,10 @@
       return RegsArm::CreateFromUcontext(ucontext);
     case ARCH_ARM64:
       return RegsArm64::CreateFromUcontext(ucontext);
+    case ARCH_MIPS:
+      return RegsMips::CreateFromUcontext(ucontext);
+    case ARCH_MIPS64:
+      return RegsMips64::CreateFromUcontext(ucontext);
     case ARCH_UNKNOWN:
     default:
       return nullptr;
@@ -89,6 +101,10 @@
   return ARCH_X86;
 #elif defined(__x86_64__)
   return ARCH_X86_64;
+#elif defined(__mips__) && !defined(__LP64__)
+  return ARCH_MIPS;
+#elif defined(__mips__) && defined(__LP64__)
+  return ARCH_MIPS64;
 #else
   abort();
 #endif
@@ -104,6 +120,10 @@
   regs = new RegsX86();
 #elif defined(__x86_64__)
   regs = new RegsX86_64();
+#elif defined(__mips__) && !defined(__LP64__)
+  regs = new RegsMips();
+#elif defined(__mips__) && defined(__LP64__)
+  regs = new RegsMips64();
 #else
   abort();
 #endif