From fe74290d51bc08e9b90ed7c145d74a22cd50b90e Mon Sep 17 00:00:00 2001 From: Arnd Bergmann Date: Mon, 2 Oct 2006 02:18:34 -0700 Subject: [PATCH] provide kernel_execve on all architectures This adds the new kernel_execve function on all architectures that were using _syscall3() to implement execve. The implementation uses code from the _syscall3 macros provided in the unistd.h header file. I don't have cross-compilers for any of these architectures, so the patch is untested with the exception of i386. Most architectures can probably implement this in a nicer way in assembly or by combining it with the sys_execve implementation itself, but this should do it for now. [bunk@stusta.de: m68knommu build fix] [markh@osdl.org: build fix] [bero@arklinux.org: build fix] [ralf@linux-mips.org: mips fix] [schwidefsky@de.ibm.com: s390 fix] Signed-off-by: Arnd Bergmann Cc: Andi Kleen Cc: Paul Mackerras Cc: Benjamin Herrenschmidt Cc: Richard Henderson Cc: Ivan Kokshaysky Cc: Russell King Cc: Ian Molton Cc: Mikael Starvik Cc: David Howells Cc: Yoshinori Sato Cc: Hirokazu Takata Cc: Ralf Baechle Cc: Kyle McMartin Cc: Heiko Carstens Cc: Martin Schwidefsky Cc: Paul Mundt Cc: Kazumoto Kojima Cc: Richard Curnow Cc: William Lee Irwin III Cc: "David S. Miller" Cc: Jeff Dike Cc: Paolo 'Blaisorblade' Giarrusso Cc: Miles Bader Cc: Chris Zankel Cc: "Luck, Tony" Cc: Geert Uytterhoeven Cc: Roman Zippel Signed-off-by: Ralf Baechle Signed-off-by: Bernhard Rosenkraenzer Signed-off-by: Mark Haverkamp Signed-off-by: Adrian Bunk Signed-off-by: Andrew Morton Signed-off-by: Linus Torvalds --- arch/m32r/kernel/sys_m32r.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'arch/m32r') diff --git a/arch/m32r/kernel/sys_m32r.c b/arch/m32r/kernel/sys_m32r.c index 7c29396cc67..b567351f3c5 100644 --- a/arch/m32r/kernel/sys_m32r.c +++ b/arch/m32r/kernel/sys_m32r.c @@ -25,6 +25,8 @@ #include #include #include +#include +#include /* * sys_tas() - test-and-set @@ -223,3 +225,21 @@ asmlinkage int sys_cachectl(char *addr, int nbytes, int op) return -ENOSYS; } +/* + * 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 long __scno __asm__ ("r7") = __NR_execve; + register long __arg3 __asm__ ("r2") = (long)(envp); + register long __arg2 __asm__ ("r1") = (long)(argv); + register long __res __asm__ ("r0") = (long)(filename); + __asm__ __volatile__ ( + "trap #" SYSCALL_VECTOR "|| nop" + : "=r" (__res) + : "r" (__scno), "0" (__res), "r" (__arg2), + "r" (__arg3) + : "memory"); + return __res; +} -- cgit v1.2.3