diff options
Diffstat (limited to 'arch/um/sys-x86_64/stub_segv.c')
| -rw-r--r-- | arch/um/sys-x86_64/stub_segv.c | 51 |
1 files changed, 0 insertions, 51 deletions
diff --git a/arch/um/sys-x86_64/stub_segv.c b/arch/um/sys-x86_64/stub_segv.c deleted file mode 100644 index a2709953319..00000000000 --- a/arch/um/sys-x86_64/stub_segv.c +++ /dev/null @@ -1,51 +0,0 @@ -/* - * Copyright (C) 2004 Jeff Dike (jdike@addtoit.com) - * Licensed under the GPL - */ - -#include <stddef.h> -#include <signal.h> -#include <linux/compiler.h> -#include <asm/unistd.h> -#include "uml-config.h" -#include "sysdep/sigcontext.h" -#include "sysdep/faultinfo.h" -#include "sysdep/stub.h" - -/* Copied from sys-x86_64/signal.c - Can't find an equivalent definition - * in the libc headers anywhere. - */ -struct rt_sigframe -{ - char *pretcode; - struct ucontext uc; - struct siginfo info; -}; - -/* Copied here from <linux/kernel.h> - we're userspace. */ -#define container_of(ptr, type, member) ({ \ - const typeof( ((type *)0)->member ) *__mptr = (ptr); \ - (type *)( (char *)__mptr - offsetof(type,member) );}) - -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); - - 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; movq %1, %%rax ; syscall": : - "g" ((unsigned long) container_of(uc, struct rt_sigframe, - uc) + 8), - "g" (__NR_rt_sigreturn)); -} |
