diff options
Diffstat (limited to 'arch/xtensa/kernel/syscalls.c')
| -rw-r--r-- | arch/xtensa/kernel/syscalls.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/xtensa/kernel/syscalls.c b/arch/xtensa/kernel/syscalls.c index 37c90ca5b98df..d9285d4d5565b 100644 --- a/arch/xtensa/kernel/syscalls.c +++ b/arch/xtensa/kernel/syscalls.c @@ -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; +} |