diff options
Diffstat (limited to 'linux-user/host/i386/hostdep.h')
| -rw-r--r-- | linux-user/host/i386/hostdep.h | 28 |
1 files changed, 28 insertions, 0 deletions
diff --git a/linux-user/host/i386/hostdep.h b/linux-user/host/i386/hostdep.h index 7609bf5cd7..ee6a810be5 100644 --- a/linux-user/host/i386/hostdep.h +++ b/linux-user/host/i386/hostdep.h @@ -12,4 +12,32 @@ #ifndef QEMU_HOSTDEP_H #define QEMU_HOSTDEP_H +/* We have a safe-syscall.inc.S */ +#define HAVE_SAFE_SYSCALL + +#ifndef __ASSEMBLER__ + +/* These are defined by the safe-syscall.inc.S file */ +extern char safe_syscall_start[]; +extern char safe_syscall_end[]; + +/* For glibc 2.1 */ +#ifndef REG_EIP +#define REG_EIP EIP +#endif + +/* Adjust the signal context to rewind out of safe-syscall if we're in it */ +static inline void rewind_if_in_safe_syscall(void *puc) +{ + struct ucontext *uc = puc; + greg_t *pcreg = &uc->uc_mcontext.gregs[REG_EIP]; + + if (*pcreg > (uintptr_t)safe_syscall_start + && *pcreg < (uintptr_t)safe_syscall_end) { + *pcreg = (uintptr_t)safe_syscall_start; + } +} + +#endif /* __ASSEMBLER__ */ + #endif |