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);
     }