From 7e3c538af1bdee7f5a4c04e11715488f1d4efd15 Mon Sep 17 00:00:00 2001 From: "digit@chromium.org" Date: Fri, 31 Aug 2012 18:38:29 +0000 Subject: Add custom getcontext() implementation for Android. This adds a minimalistic implementation of getcontext() for Android/ARM and Android/x86. The provided code is in assembly and only implements the bare minimum required by Breakpad to get the current processor state. Note that: - The FPU state is not saved to the ucontext_t on ARM. (that's actually the main difference with a normal getcontext() implementation). This is normal. On Linux/ARM, such state must be obtained with PTRACE_GETVFPREGS instead. This will be implemented in a future patch. - On x86, only the 'regular' FPU state is saved, to mimic the GLibc/i386 implementation. The state of SSE/SSE2/etc registers is not part of the upstream getcontext() implementation. Review URL: https://breakpad.appspot.com/444002 git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1024 4c0a9323-5329-0410-9bdc-e9ce6186880e --- src/common/android/include/sys/ucontext.h | 14 +++++++++++++- 1 file changed, 13 insertions(+), 1 deletion(-) (limited to 'src/common/android/include/sys') diff --git a/src/common/android/include/sys/ucontext.h b/src/common/android/include/sys/ucontext.h index 7f0eb5a3..4a4e77c1 100644 --- a/src/common/android/include/sys/ucontext.h +++ b/src/common/android/include/sys/ucontext.h @@ -50,11 +50,15 @@ extern "C" { #include typedef struct sigcontext mcontext_t; +// The ARM kernel uses a 64-bit signal mask. +typedef uint32_t kernel_sigmask_t[2]; + typedef struct ucontext { uint32_t uc_flags; struct ucontext* uc_link; stack_t uc_stack; mcontext_t uc_mcontext; + kernel_sigmask_t uc_sigmask; // Other fields are not used by Google Breakpad. Don't define them. } ucontext_t; @@ -110,12 +114,16 @@ enum { REG_SS, }; +// The i386 kernel uses a 64-bit signal mask. +typedef uint32_t kernel_sigmask_t[2]; + typedef struct ucontext { uint32_t uc_flags; struct ucontext* uc_link; stack_t uc_stack; mcontext_t uc_mcontext; - // Other fields are not used by Google Breakpad. Don't define them. + kernel_sigmask_t uc_sigmask; + struct _libc_fpstate __fpregs_mem; } ucontext_t; #elif defined(__mips__) @@ -142,11 +150,15 @@ typedef struct { uint32_t lo3; } mcontext_t; +// The MIPS kernel uses a 128-bit signal mask. +typedef uint32_t kernel_sigmask_t[4]; + typedef struct ucontext { uint32_t uc_flags; struct ucontext* uc_link; stack_t uc_stack; mcontext_t uc_mcontext; + kernel_sigmask_t uc_sigmask; // Other fields are not used by Google Breakpad. Don't define them. } ucontext_t; -- cgit v1.2.1