diff options
Diffstat (limited to 'arch/um/sys-x86_64/stub_segv.c')
| -rw-r--r-- | arch/um/sys-x86_64/stub_segv.c | 20 |
1 files changed, 10 insertions, 10 deletions
diff --git a/arch/um/sys-x86_64/stub_segv.c b/arch/um/sys-x86_64/stub_segv.c index d1e53bdf2e85e..a270995331985 100644 --- a/arch/um/sys-x86_64/stub_segv.c +++ b/arch/um/sys-x86_64/stub_segv.c @@ -3,14 +3,14 @@ * Licensed under the GPL */ -#include <asm/signal.h> +#include <stddef.h> +#include <signal.h> #include <linux/compiler.h> #include <asm/unistd.h> -#include <asm/ucontext.h> #include "uml-config.h" #include "sysdep/sigcontext.h" #include "sysdep/faultinfo.h" -#include <stddef.h> +#include "sysdep/stub.h" /* Copied from sys-x86_64/signal.c - Can't find an equivalent definition * in the libc headers anywhere. @@ -31,21 +31,21 @@ void __attribute__ ((__section__ (".__syscall_stub"))) stub_segv_handler(int sig) { struct ucontext *uc; + int pid; __asm__("movq %%rdx, %0" : "=g" (uc) :); GET_FAULTINFO_FROM_SC(*((struct faultinfo *) UML_CONFIG_STUB_DATA), &uc->uc_mcontext); - __asm__("movq %0, %%rax ; syscall": : "g" (__NR_getpid)); - __asm__("movq %%rax, %%rdi ; movq %0, %%rax ; movq %1, %%rsi ;" - "syscall": : "g" (__NR_kill), "g" (SIGUSR1) : - "%rdi", "%rax", "%rsi"); + pid = stub_syscall0(__NR_getpid); + stub_syscall2(__NR_kill, pid, SIGUSR1); + /* sys_sigreturn expects that the stack pointer will be 8 bytes into * the signal frame. So, we use the ucontext pointer, which we know * already, to get the signal frame pointer, and add 8 to that. */ - __asm__("movq %0, %%rsp": : + __asm__("movq %0, %%rsp; movq %1, %%rax ; syscall": : "g" ((unsigned long) container_of(uc, struct rt_sigframe, - uc) + 8)); - __asm__("movq %0, %%rax ; syscall" : : "g" (__NR_rt_sigreturn)); + uc) + 8), + "g" (__NR_rt_sigreturn)); } |