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authorArnd Bergmann <arnd@arndb.de>2006-10-02 05:18:34 -0400
committerLinus Torvalds <torvalds@g5.osdl.org>2006-10-02 10:57:23 -0400
commitfe74290d51bc08e9b90ed7c145d74a22cd50b90e (patch)
treebec3a117a95a1ace6dba6a76b3edbd6297d40b63 /arch/sh
parent3db03b4afb3ecd66a0399b8ba57742ca953b0ecd (diff)
[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 <arnd@arndb.de> Cc: Andi Kleen <ak@muc.de> Cc: Paul Mackerras <paulus@samba.org> Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org> Cc: Richard Henderson <rth@twiddle.net> Cc: Ivan Kokshaysky <ink@jurassic.park.msu.ru> Cc: Russell King <rmk@arm.linux.org.uk> Cc: Ian Molton <spyro@f2s.com> Cc: Mikael Starvik <starvik@axis.com> Cc: David Howells <dhowells@redhat.com> Cc: Yoshinori Sato <ysato@users.sourceforge.jp> Cc: Hirokazu Takata <takata.hirokazu@renesas.com> Cc: Ralf Baechle <ralf@linux-mips.org> Cc: Kyle McMartin <kyle@mcmartin.ca> Cc: Heiko Carstens <heiko.carstens@de.ibm.com> Cc: Martin Schwidefsky <schwidefsky@de.ibm.com> Cc: Paul Mundt <lethal@linux-sh.org> Cc: Kazumoto Kojima <kkojima@rr.iij4u.or.jp> Cc: Richard Curnow <rc@rc0.org.uk> Cc: William Lee Irwin III <wli@holomorphy.com> Cc: "David S. Miller" <davem@davemloft.net> Cc: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Cc: Miles Bader <uclinux-v850@lsi.nec.co.jp> Cc: Chris Zankel <chris@zankel.net> Cc: "Luck, Tony" <tony.luck@intel.com> Cc: Geert Uytterhoeven <geert@linux-m68k.org> Cc: Roman Zippel <zippel@linux-m68k.org> Signed-off-by: Ralf Baechle <ralf@linux-mips.org> Signed-off-by: Bernhard Rosenkraenzer <bero@arklinux.org> Signed-off-by: Mark Haverkamp <markh@osdl.org> Signed-off-by: Adrian Bunk <bunk@stusta.de> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'arch/sh')
-rw-r--r--arch/sh/kernel/sys_sh.c17
1 files changed, 17 insertions, 0 deletions
diff --git a/arch/sh/kernel/sys_sh.c b/arch/sh/kernel/sys_sh.c
index 11c2acde6eaa..8fde95001c34 100644
--- a/arch/sh/kernel/sys_sh.c
+++ b/arch/sh/kernel/sys_sh.c
@@ -25,6 +25,7 @@
25#include <asm/cacheflush.h> 25#include <asm/cacheflush.h>
26#include <asm/uaccess.h> 26#include <asm/uaccess.h>
27#include <asm/ipc.h> 27#include <asm/ipc.h>
28#include <asm/unistd.h>
28 29
29/* 30/*
30 * sys_pipe() is the normal C calling standard for creating 31 * sys_pipe() is the normal C calling standard for creating
@@ -309,3 +310,19 @@ asmlinkage int sys_fadvise64_64_wrapper(int fd, u32 offset0, u32 offset1,
309 (u64)len0 << 32 | len1, advice); 310 (u64)len0 << 32 | len1, advice);
310#endif 311#endif
311} 312}
313
314/*
315 * Do a system call from kernel instead of calling sys_execve so we
316 * end up with proper pt_regs.
317 */
318int kernel_execve(const char *filename, char *const argv[], char *const envp[])
319{
320 register long __sc0 __asm__ ("r3") = __NR_execve;
321 register long __sc4 __asm__ ("r4") = (long) filename;
322 register long __sc5 __asm__ ("r5") = (long) argv;
323 register long __sc6 __asm__ ("r6") = (long) envp;
324 __asm__ __volatile__ ("trapa #0x13" : "=z" (__sc0)
325 : "0" (__sc0), "r" (__sc4), "r" (__sc5), "r" (__sc6)
326 : "memory");
327 return __sc0;
328}