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| author | H.J. Lu <hjl.tools@gmail.com> | 2015-12-14 20:35:40 -0800 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2015-12-14 20:35:40 -0800 |
| commit | d4f465df65a5723ede4cf933afee5582312fc603 (patch) | |
| tree | 76fbc9a3b9e88ed2023bf15fa158fa870b3760ac | |
| parent | 8a4f1e5889edc41f97c861af81d0f0354d0bc75a (diff) | |
| download | glibc-d4f465df65a5723ede4cf933afee5582312fc603.tar.gz glibc-d4f465df65a5723ede4cf933afee5582312fc603.tar.xz glibc-d4f465df65a5723ede4cf933afee5582312fc603.zip | |
Add REGISTERS_CLOBBERED_BY_SYSCALL
| -rw-r--r-- | sysdeps/unix/sysv/linux/x86_64/sysdep.h | 7 |
1 files changed, 5 insertions, 2 deletions
diff --git a/sysdeps/unix/sysv/linux/x86_64/sysdep.h b/sysdeps/unix/sysv/linux/x86_64/sysdep.h index fc132f6791..c364d0816a 100644 --- a/sysdeps/unix/sysv/linux/x86_64/sysdep.h +++ b/sysdeps/unix/sysv/linux/x86_64/sysdep.h @@ -218,6 +218,9 @@ # undef INTERNAL_SYSCALL_DECL # define INTERNAL_SYSCALL_DECL(err) do { } while (0) +/* Registers clobbered by syscall. */ +# define REGISTERS_CLOBBERED_BY_SYSCALL "cc", "r11", "cx" + # define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ ({ \ unsigned long int resultvar; \ @@ -226,7 +229,7 @@ asm volatile ( \ "syscall\n\t" \ : "=a" (resultvar) \ - : "0" (name) ASM_ARGS_##nr : "memory", "cc", "r11", "cx"); \ + : "0" (name) ASM_ARGS_##nr : "memory", REGISTERS_CLOBBERED_BY_SYSCALL); \ (long int) resultvar; }) # undef INTERNAL_SYSCALL # define INTERNAL_SYSCALL(name, err, nr, args...) \ @@ -240,7 +243,7 @@ asm volatile ( \ "syscall\n\t" \ : "=a" (resultvar) \ - : "0" (name) ASM_ARGS_##nr : "memory", "cc", "r11", "cx"); \ + : "0" (name) ASM_ARGS_##nr : "memory", REGISTERS_CLOBBERED_BY_SYSCALL); \ (long int) resultvar; }) # undef INTERNAL_SYSCALL_TYPES # define INTERNAL_SYSCALL_TYPES(name, err, nr, args...) \ |