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| author | Arnd Bergmann <arnd@arndb.de> | 2006-10-02 02:18:34 -0700 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-02 07:57:23 -0700 |
| commit | fe74290d51bc08e9b90ed7c145d74a22cd50b90e (patch) | |
| tree | bec3a117a95a1ace6dba6a76b3edbd6297d40b63 /arch/v850 | |
| parent | 3db03b4afb3ecd66a0399b8ba57742ca953b0ecd (diff) | |
| download | linux-3.10-fe74290d51bc08e9b90ed7c145d74a22cd50b90e.tar.gz linux-3.10-fe74290d51bc08e9b90ed7c145d74a22cd50b90e.tar.bz2 linux-3.10-fe74290d51bc08e9b90ed7c145d74a22cd50b90e.zip | |
[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')
| -rw-r--r-- | arch/v850/kernel/syscalls.c | 20 |
1 files changed, 20 insertions, 0 deletions
diff --git a/arch/v850/kernel/syscalls.c b/arch/v850/kernel/syscalls.c index 2ec0700fc46..d2b1fb19d24 100644 --- a/arch/v850/kernel/syscalls.c +++ b/arch/v850/kernel/syscalls.c @@ -33,6 +33,7 @@ #include <asm/uaccess.h> #include <asm/ipc.h> #include <asm/semaphore.h> +#include <asm/unistd.h> /* * 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, out: return err; } + +/* + * 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 char *__a __asm__ ("r6") = filename; + register void *__b __asm__ ("r7") = argv; + register void *__c __asm__ ("r8") = envp; + register unsigned long __syscall __asm__ ("r12") = __NR_execve; + register unsigned long __ret __asm__ ("r10"); + __asm__ __volatile__ ("trap 0" + : "=r" (__ret), "=r" (__syscall) + : "1" (__syscall), "r" (__a), "r" (__b), "r" (__c) + : "r1", "r5", "r11", "r13", "r14", + "r15", "r16", "r17", "r18", "r19"); + return __ret; +} |