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/v850/kernel/syscalls.c | 20 ++++++++++++++++++++ 1 file changed, 20 insertions(+) (limited to 'arch/v850') 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 #include #include +#include /* * 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; +} -- cgit v1.2.3-59-g8ed1b