| From 5c63eb5d56abd4e5232add4727247965a863d851 Mon Sep 17 00:00:00 2001 |
| From: Khem Raj <raj.khem@gmail.com> |
| Date: Sun, 15 Dec 2019 14:02:45 -0800 |
| Subject: [PATCH] Do not add stack pointer to clobber list |
| |
| It was being ignored until now when gcc 9.0 became capable |
| of flagging these silent ignore via [1]. |
| |
| We weren't actually clobbering the stack pointers here |
| so it should not cause change in behavior. |
| |
| [1] https://gcc.gnu.org/PR52813 |
| |
| Signed-off-by: Khem Raj <raj.khem@gmail.com> |
| --- |
| linux_syscall_support.h | 8 ++++---- |
| 1 file changed, 4 insertions(+), 4 deletions(-) |
| |
| diff --git a/linux_syscall_support.h b/linux_syscall_support.h |
| index 9276f56..6e73309 100644 |
| --- a/linux_syscall_support.h |
| +++ b/linux_syscall_support.h |
| @@ -1955,7 +1955,7 @@ struct kernel_statfs { |
| LSS_ENTRYPOINT \ |
| "pop %%ebx" \ |
| args \ |
| - : "esp", "memory"); \ |
| + : "memory"); \ |
| LSS_RETURN(type,__res) |
| #undef _syscall0 |
| #define _syscall0(type,name) \ |
| @@ -2012,7 +2012,7 @@ struct kernel_statfs { |
| : "i" (__NR_##name), "ri" ((long)(arg1)), \ |
| "c" ((long)(arg2)), "d" ((long)(arg3)), \ |
| "S" ((long)(arg4)), "D" ((long)(arg5)) \ |
| - : "esp", "memory"); \ |
| + : "memory"); \ |
| LSS_RETURN(type,__res); \ |
| } |
| #undef _syscall6 |
| @@ -2034,7 +2034,7 @@ struct kernel_statfs { |
| : "i" (__NR_##name), "0" ((long)(&__s)), \ |
| "c" ((long)(arg2)), "d" ((long)(arg3)), \ |
| "S" ((long)(arg4)), "D" ((long)(arg5)) \ |
| - : "esp", "memory"); \ |
| + : "memory"); \ |
| LSS_RETURN(type,__res); \ |
| } |
| LSS_INLINE int LSS_NAME(clone)(int (*fn)(void *), void *child_stack, |
| @@ -2120,7 +2120,7 @@ struct kernel_statfs { |
| : "0"(-EINVAL), "i"(__NR_clone), |
| "m"(fn), "m"(child_stack), "m"(flags), "m"(arg), |
| "m"(parent_tidptr), "m"(newtls), "m"(child_tidptr) |
| - : "esp", "memory", "ecx", "edx", "esi", "edi"); |
| + : "memory", "ecx", "edx", "esi", "edi"); |
| LSS_RETURN(int, __res); |
| } |
| |
| -- |
| 2.24.1 |
| |