diff options
author | Jeff Dike <jdike@addtoit.com> | 2005-11-22 05:32:09 (GMT) |
---|---|---|
committer | Linus Torvalds <torvalds@g5.osdl.org> | 2005-11-22 17:13:41 (GMT) |
commit | 17d469715c6453e4994e6617e8f644bf10f38584 (patch) | |
tree | 0bfc17100309b888315c3cae02adfd1783c04774 /arch/um/include/sysdep-x86_64/stub.h | |
parent | e23181deec0d2a8be576faf9d71211abb84d5ccc (diff) | |
download | linux-fsl-qoriq-17d469715c6453e4994e6617e8f644bf10f38584.tar.xz |
[PATCH] uml: properly invoke x86_64 system calls
This patch makes stub_segv use the stub_syscall macros. This was needed
anyway, but the bug that prompted this was the discovery that gcc was storing
stuff in RCX, which is trashed across a system call. This is exactly the sort
of problem that the new macros fix.
There is a stub_syscall0 for getpid. stub_segv was changed to be a libc file,
and that caused some include changes.
Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/um/include/sysdep-x86_64/stub.h')
-rw-r--r-- | arch/um/include/sysdep-x86_64/stub.h | 12 |
1 files changed, 11 insertions, 1 deletions
diff --git a/arch/um/include/sysdep-x86_64/stub.h b/arch/um/include/sysdep-x86_64/stub.h index 2bd6e7a..c41689c 100644 --- a/arch/um/include/sysdep-x86_64/stub.h +++ b/arch/um/include/sysdep-x86_64/stub.h @@ -6,7 +6,6 @@ #ifndef __SYSDEP_STUB_H #define __SYSDEP_STUB_H -#include <asm/ptrace.h> #include <asm/unistd.h> #include <sysdep/ptrace_user.h> @@ -20,6 +19,17 @@ extern void stub_clone_handler(void); #define __syscall_clobber "r11","rcx","memory" #define __syscall "syscall" +static inline long stub_syscall0(long syscall) +{ + long ret; + + __asm__ volatile (__syscall + : "=a" (ret) + : "0" (syscall) : __syscall_clobber ); + + return ret; +} + static inline long stub_syscall2(long syscall, long arg1, long arg2) { long ret; |