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From d1d7b616219fd47736c804ff4c2f393d7184a75b Mon Sep 17 00:00:00 2001
From: Khem Raj <raj.khem@gmail.com>
Date: Sun, 23 Dec 2018 16:58:04 -0800
Subject: [PATCH] chromium: stack pointer clobber
Do not add stack pointer to clobber list
it was being ignored until gcc 9.0 became capable
of flagging this silent ignoring via [1]
[1] https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52813<Paste>
Upstream-Status: Submitted [https://chromium-review.googlesource.com/c/linux-syscall-support/+/1390160]
Signed-off-by: Khem Raj <raj.khem@gmail.com>
---
src/third_party/lss/linux_syscall_support.h | 10 +++++-----
1 file changed, 5 insertions(+), 5 deletions(-)
Index: b/src/third_party/lss/linux_syscall_support.h
===================================================================
--- a/src/third_party/lss/linux_syscall_support.h
+++ b/src/third_party/lss/linux_syscall_support.h
@@ -1957,7 +1957,7 @@ struct kernel_statfs {
LSS_ENTRYPOINT \
"pop %%ebx" \
args \
- : "esp", "memory"); \
+ : "memory"); \
LSS_RETURN(type,__res)
#undef _syscall0
#define _syscall0(type,name) \
@@ -1966,7 +1966,7 @@ struct kernel_statfs {
__asm__ volatile(LSS_ENTRYPOINT \
: "=a" (__res) \
: "0" (__NR_##name) \
- : "esp", "memory"); \
+ : "memory"); \
LSS_RETURN(type,__res); \
}
#undef _syscall1
@@ -2014,7 +2014,7 @@ 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
@@ -2036,7 +2036,7 @@ 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,
@@ -2122,7 +2122,7 @@ 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);
}
@@ -2407,7 +2407,7 @@ struct kernel_statfs {
"d"(LSS_SYSCALL_ARG(parent_tidptr)),
"r"(LSS_SYSCALL_ARG(newtls)),
"r"(LSS_SYSCALL_ARG(child_tidptr))
- : "rsp", "memory", "r8", "r10", "r11", "rcx");
+ : "memory", "r8", "r10", "r11", "rcx");
}
LSS_RETURN(int, __res);
}
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