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authorMartin Schwidefsky <schwidefsky@de.ibm.com>2007-04-27 16:01:40 +0200
committerMartin Schwidefsky <schwidefsky@de.ibm.com>2007-04-27 16:01:42 +0200
commit03ff9a235a0602724fc54916469b6e0939c62c9b (patch)
tree86ab2236897eb59542be2ccd667d6ca221153a44 /arch/s390/kernel/sys_s390.c
parentef99516c9646802c3d38c3eb83de302e05b3c1b5 (diff)
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op-kernel-dev-03ff9a235a0602724fc54916469b6e0939c62c9b.tar.gz
[S390] System call cleanup.
Remove system call glue for sys_clone, sys_fork, sys_vfork, sys_execve, sys_sigreturn, sys_rt_sigreturn and sys_sigaltstack. Call do_execve from kernel_execve directly, move pt_regs to the right place and branch to sysc_return to start the user space program. This removes the last in-kernel system call. Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com> Signed-off-by: Heiko Carstens <heiko.carstens@de.ibm.com>
Diffstat (limited to 'arch/s390/kernel/sys_s390.c')
-rw-r--r--arch/s390/kernel/sys_s390.c20
1 files changed, 0 insertions, 20 deletions
diff --git a/arch/s390/kernel/sys_s390.c b/arch/s390/kernel/sys_s390.c
index 584ed95..3a77c22 100644
--- a/arch/s390/kernel/sys_s390.c
+++ b/arch/s390/kernel/sys_s390.c
@@ -266,23 +266,3 @@ s390_fadvise64_64(struct fadvise64_64_args __user *args)
return -EFAULT;
return sys_fadvise64_64(a.fd, a.offset, a.len, a.advice);
}
-
-/*
- * Do a system call from kernel instead of calling sys_execve so we
- * end up with proper pt_regs.
- */
-int kernel_execve(const char *filename, char *const argv[], char *const envp[])
-{
- register const char *__arg1 asm("2") = filename;
- register char *const*__arg2 asm("3") = argv;
- register char *const*__arg3 asm("4") = envp;
- register long __svcres asm("2");
- asm volatile(
- "svc %b1"
- : "=d" (__svcres)
- : "i" (__NR_execve),
- "0" (__arg1),
- "d" (__arg2),
- "d" (__arg3) : "memory");
- return __svcres;
-}
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