aboutsummaryrefslogtreecommitdiffstats
path: root/arch/v850/kernel
diff options
context:
space:
mode:
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/v850/kernel
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/v850/kernel')
-rw-r--r--arch/v850/kernel/syscalls.c20
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/v850/kernel/syscalls.c b/arch/v850/kernel/syscalls.c
index 2ec0700fc46b..d2b1fb19d243 100644
--- a/arch/v850/kernel/syscalls.c
+++ b/arch/v850/kernel/syscalls.c
@@ -33,6 +33,7 @@
33#include <asm/uaccess.h> 33#include <asm/uaccess.h>
34#include <asm/ipc.h> 34#include <asm/ipc.h>
35#include <asm/semaphore.h> 35#include <asm/semaphore.h>
36#include <asm/unistd.h>
36 37
37/* 38/*
38 * sys_ipc() is the de-multiplexer for the SysV IPC calls.. 39 * sys_ipc() is the de-multiplexer for the SysV IPC calls..
@@ -194,3 +195,22 @@ unsigned long sys_mmap (unsigned long addr, size_t len,
194out: 195out:
195 return err; 196 return err;
196} 197}
198
199/*
200 * Do a system call from kernel instead of calling sys_execve so we
201 * end up with proper pt_regs.
202 */
203int kernel_execve(const char *filename, char *const argv[], char *const envp[])
204{
205 register char *__a __asm__ ("r6") = filename;
206 register void *__b __asm__ ("r7") = argv;
207 register void *__c __asm__ ("r8") = envp;
208 register unsigned long __syscall __asm__ ("r12") = __NR_execve;
209 register unsigned long __ret __asm__ ("r10");
210 __asm__ __volatile__ ("trap 0"
211 : "=r" (__ret), "=r" (__syscall)
212 : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c)
213 : "r1", "r5", "r11", "r13", "r14",
214 "r15", "r16", "r17", "r18", "r19");
215 return __ret;
216}