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Android ucontext_t handling refinement.

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This is a forward-compatible patch to prepare for future versions
of the Android C library headers that define ucontext_t.

When this patch is applied, Google Breakpad will build and work
properly against any version of the NDK or platform headers.

See http://code.google.com/p/android/issues/detail?id=34784 for
more context.
Review URL: https://breakpad.appspot.com/416002

git-svn-id: http://google-breakpad.googlecode.com/svn/trunk@1000 4c0a9323-5329-0410-9bdc-e9ce6186880e
This commit is contained in:
digit@chromium.org 2012-08-01 17:36:59 +00:00
parent c578271545
commit 8f59faffd1
1 changed files with 116 additions and 13 deletions
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129
src/client/linux/android_ucontext.h
View file

@ -27,31 +27,134 @@
// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
// Android runs a fairly new Linux kernel, so signal info is there,
// but the NDK doesn't have the structs defined, so define
// them here.
// Adapted from platform-linux.cc in V8
// Only recent versions of Android's C library correctly define the
// required types for ucontext_t handling. This header provides a
// custom declarations that will work when Google Breakpad is built
// against any version of the NDK or platform headers, and work on
// any version of the system.
//
// See http://code.google.com/p/android/issues/detail?id=34784
//
#ifndef GOOGLE_BREAKPAD_CLIENT_LINUX_ANDROID_UCONTEXT_H_
#define GOOGLE_BREAKPAD_CLIENT_LINUX_ANDROID_UCONTEXT_H_
#include <android/api-level.h>
#include <signal.h>
#include <stdint.h>
// <signal.h> didn't include <asm/sigcontext.h> before API level 8.
// It is used to define struct sigcontext properly.
#if defined(__arm__) && __ANDROID_API__ < 8
#ifndef __BIONIC_HAVE_UCONTEXT_T
#if defined(__arm__)
// Ensure that 'struct sigcontext' is defined.
#include <asm/sigcontext.h>
#endif
typedef uint32_t __sigset_t;
typedef struct sigcontext mcontext_t;
typedef struct ucontext {
uint32_t uc_flags;
struct ucontext* uc_link;
stack_t uc_stack;
mcontext_t uc_mcontext;
__sigset_t uc_sigmask;
// Other fields are not used by Google Breakpad. Don't define them.
} ucontext_t;
#elif defined(__i386__)
/* 80-bit floating-point register */
struct _libc_fpreg {
unsigned short significand[4];
unsigned short exponent;
};
/* Simple floating-point state, see FNSTENV instruction */
struct _libc_fpstate {
unsigned long cw;
unsigned long sw;
unsigned long tag;
unsigned long ipoff;
unsigned long cssel;
unsigned long dataoff;
unsigned long datasel;
struct _libc_fpreg _st[8];
unsigned long status;
};
typedef struct {
uint32_t gregs[19];
struct _libc_fpstate* fpregs;
uint32_t oldmask;
uint32_t cr2;
} mcontext_t;
enum {
REG_GS = 0,
REG_FS,
REG_ES,
REG_DS,
REG_EDI,
REG_ESI,
REG_EBP,
REG_ESP,
REG_EBX,
REG_EDX,
REG_ECX,
REG_EAX,
REG_TRAPNO,
REG_ERR,
REG_EIP,
REG_CS,
REG_EFL,
REG_UESP,
REG_SS,
REG_ES,
REG_ES,
REG_ES,
REG_ES,
};
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.
} ucontext_t;
#elif defined(__mips__)
// Not supported by Google Breakpad at this point, but just in case.
typedef struct {
uint32_t regmask;
uint32_t status;
uint64_t pc;
uint64_t gregs[32];
uint64_t fpregs[32];
uint32_t acx;
uint32_t fpc_csr;
uint32_t fpc_eir;
uint32_t used_math;
uint32_t dsp;
uint64_t mdhi;
uint64_t mdlo;
uint32_t hi1;
uint32_t lo1;
uint32_t hi2;
uint32_t lo2;
uint32_t hi3;
uint32_t lo3;
} mcontext_t;
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.
} ucontext_t;
#else
# error "Unsupported Android CPU ABI!"
#endif
#endif // !__BIONIC_HAVE_UCONTEXT_T
#endif // GOOGLE_BREAKPAD_CLIENT_LINUX_ANDROID_UCONTEXT_H_