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author | Arnd Bergmann <arnd@arndb.de> | 2006-10-02 02:18:34 -0700 |
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committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-10-02 07:57:23 -0700 |
commit | fe74290d51bc08e9b90ed7c145d74a22cd50b90e (patch) | |
tree | bec3a117a95a1ace6dba6a76b3edbd6297d40b63 /arch/v850/kernel | |
parent | 3db03b4afb3ecd66a0399b8ba57742ca953b0ecd (diff) | |
download | linux-fe74290d51bc08e9b90ed7c145d74a22cd50b90e.tar.gz |
[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.c | 20 |
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 @@ #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; +} |