diff options
Diffstat (limited to 'arch/xtensa/kernel/syscalls.c')
| -rw-r--r-- | arch/xtensa/kernel/syscalls.c | 24 |
1 files changed, 22 insertions, 2 deletions
diff --git a/arch/xtensa/kernel/syscalls.c b/arch/xtensa/kernel/syscalls.c index 4688ba2db84..f49cb239e60 100644 --- a/arch/xtensa/kernel/syscalls.c +++ b/arch/xtensa/kernel/syscalls.c @@ -1,5 +1,5 @@ /* - * arch/xtensa/kernel/syscall.c + * arch/xtensa/kernel/syscalls.c * * This file is subject to the terms and conditions of the GNU General Public * License. See the file "COPYING" in the main directory of this archive @@ -128,7 +128,7 @@ out: int sys_uname(struct old_utsname * name) { - if (name && !copy_to_user(name, &system_utsname, sizeof (*name))) + if (name && !copy_to_user(name, utsname(), sizeof (*name))) return 0; return -EFAULT; } @@ -266,3 +266,23 @@ void system_call (struct pt_regs *regs) regs->areg[2] = res; do_syscall_trace(); } + +/* + * 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[]) +{ + long __res; + asm volatile ( + " mov a5, %2 \n" + " mov a4, %4 \n" + " mov a3, %3 \n" + " movi a2, %1 \n" + " syscall \n" + " mov %0, a2 \n" + : "=a" (__res) + : "i" (__NR_execve), "a" (filename), "a" (argv), "a" (envp) + : "a2", "a3", "a4", "a5"); + return __res; +} |