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Add user_regs_struct and user_fpsimd_struct for aarch64 on Android.

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Android's sys/user.h is missing user_regs_struct and user_fpsimd_struct.
Add them to the Android specific user.h used by breakpad to workaround
Android / glibc compatibility issues.

A bug has been filed on the Android NDK team to add the missing structures to
the NDK, at which point this hack can be removed.

Also remove the mxcsr_mask hack on x64, which is no longer required since
we have moved to the r10d NDK which fixes this issue.

R=primiano@chromium.org

Review URL: https://codereview.chromium.org/1291983003 .

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1495 4c0a9323-5329-0410-9bdc-e9ce6186880e
This commit is contained in:
rmcilroy@chromium.org 2015-08-20 14:30:38 +00:00
parent 9178d8fa03
commit 8e8be001cb
1 changed files with 23 additions and 18 deletions
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41
src/common/android/include/sys/user.h
View file

@ -34,29 +34,14 @@
// glibc) and therefore avoid doing otherwise awkward #ifdefs in the code.
// The following quirks are currently handled by this file:
// - i386: Use the Android NDK but alias user_fxsr_struct > user_fpxregs_struct.
// - x86_64: Override a typo in user_fpregs_struct (mxcsr_mask -> mxcr_mask).
// The typo has been fixed in NDK r10d, but a preprocessor workaround is
// required to make breakpad build with r10c and lower (more details below).
// - aarch64: Add missing user_regs_struct and user_fpsimd_struct structs.
// - Other platforms: Just use the Android NDK unchanged.
// TODO(primiano): remove this after Chromium has stably rolled to NDK r10d.
// Historical context: NDK releases < r10d had a typo in sys/user.h (mxcsr_mask
// instead of mxcr_mask), which is fixed in r10d. However, just switching to use
// the correct one (mxcr_mask) would put Breakpad in a state where it can be
// rolled in chromium only atomically with the r10d NDK. A revert of either
// project (android_tools, breakpad) would make the other one unrollable.
// This hack makes breakpad code compatible with both r10c and r10d NDKs,
// reducing the dependency entangling with android_tools.
#if defined(__x86_64__)
#define mxcsr_mask mxcr_mask
#endif
// TODO(primiano): remove these changes after Chromium has stably rolled to
// an NDK with the appropriate fixes.
#include_next <sys/user.h>
#if defined(__x86_64__)
#undef mxcsr_mask
#endif
#ifdef __i386__
#ifdef __cplusplus
extern "C" {
@ -67,4 +52,24 @@ typedef struct user_fxsr_struct user_fpxregs_struct;
#endif // __cplusplus
#endif // __i386__
#ifdef __aarch64__
#ifdef __cplusplus
extern "C" {
#endif // __cplusplus
struct user_regs_struct {
__u64 regs[31];
__u64 sp;
__u64 pc;
__u64 pstate;
};
struct user_fpsimd_struct {
__uint128_t vregs[32];
__u32 fpsr;
__u32 fpcr;
};
#ifdef __cplusplus
} // extern "C"
#endif // __cplusplus
#endif // __aarch64__
#endif // GOOGLE_BREAKPAD_COMMON_ANDROID_INCLUDE_SYS_USER_H