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h8300: generic kernel_execve()

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Signed-off-by: Al Viro <viro@zeniv.linux.org.uk>
This commit is contained in:
Al Viro 2012-10-10 13:29:28 -04:00
parent 557e1995a9
commit 5fae1b6645
3 changed files with 2 additions and 28 deletions
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1
arch/h8300/Kconfig
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@ -9,6 +9,7 @@ config H8300
select GENERIC_CPU_DEVICES
select MODULES_USE_ELF_RELA
select GENERIC_KERNEL_THREAD
select GENERIC_KERNEL_EXECVE
config SYMBOL_PREFIX
string

3
arch/h8300/kernel/entry.S
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@ -337,8 +337,7 @@ SYMBOL_NAME_LABEL(ret_from_kernel_thread)
mov.l @(LER4:16,sp),er0
mov.l @(LER5:16,sp),er1
jsr @er1
sub.l @er0,@er0
jsr @SYMBOL_NAME(sys_exit)
jmp @SYMBOL_NAME(ret_from_exception)
SYMBOL_NAME_LABEL(resume)
/*

26
arch/h8300/kernel/sys_h8300.c
View File

@ -46,29 +46,3 @@ asmlinkage void syscall_print(void *dummy,...)
((regs->pc)&0xffffff)-2,regs->orig_er0,regs->er1,regs->er2,regs->er3,regs->er0);
}
#endif
/*
* Do a system call from kernel instead of calling sys_execve so we
* end up with proper pt_regs.
*/
asmlinkage
int kernel_execve(const char *filename,
const char *const argv[],
const char *const envp[])
{
register long res __asm__("er0");
register const char *const *_c __asm__("er3") = envp;
register const char *const *_b __asm__("er2") = argv;
register const char * _a __asm__("er1") = filename;
__asm__ __volatile__ ("mov.l %1,er0\n\t"
"trapa #0\n\t"
: "=r" (res)
: "g" (__NR_execve),
"g" (_a),
"g" (_b),
"g" (_c)
: "cc", "memory");
return res;
}