diff options
Diffstat (limited to 'arch/sh64')
| -rw-r--r-- | arch/sh64/kernel/sys_sh64.c | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/arch/sh64/kernel/sys_sh64.c b/arch/sh64/kernel/sys_sh64.c index c6de1a95af4..ad0fa4e003e 100644 --- a/arch/sh64/kernel/sys_sh64.c +++ b/arch/sh64/kernel/sys_sh64.c @@ -32,6 +32,7 @@ #include <asm/uaccess.h> #include <asm/ipc.h> #include <asm/ptrace.h> +#include <asm/unistd.h> #define REG_3 3 @@ -283,3 +284,21 @@ asmlinkage int sys_uname(struct old_utsname * name) up_read(&uts_sem); return err?-EFAULT:0; } + +/* + * 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 unsigned long __sc0 __asm__ ("r9") = ((0x13 << 16) | __NR_execve); + register unsigned long __sc2 __asm__ ("r2") = (unsigned long) filename; + register unsigned long __sc3 __asm__ ("r3") = (unsigned long) argv; + register unsigned long __sc4 __asm__ ("r4") = (unsigned long) envp; + __asm__ __volatile__ ("trapa %1 !\t\t\t execve(%2,%3,%4)" + : "=r" (__sc0) + : "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4) ); + __asm__ __volatile__ ("!dummy %0 %1 %2 %3" + : : "r" (__sc0), "r" (__sc2), "r" (__sc3), "r" (__sc4) : "memory"); + return __sc0; +} |