From 6582b7f7743da6ce3e3714e9e8b18e0e073d4acd Mon Sep 17 00:00:00 2001 From: Al Viro Date: Thu, 18 Aug 2011 20:03:19 +0100 Subject: um: merge arch/um/sys-{i386,x86_64} Signed-off-by: Al Viro Signed-off-by: Richard Weinberger --- arch/um/sys-x86/syscalls_32.c | 66 +++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 66 insertions(+) create mode 100644 arch/um/sys-x86/syscalls_32.c (limited to 'arch/um/sys-x86/syscalls_32.c') diff --git a/arch/um/sys-x86/syscalls_32.c b/arch/um/sys-x86/syscalls_32.c new file mode 100644 index 000000000000..70ca357393b8 --- /dev/null +++ b/arch/um/sys-x86/syscalls_32.c @@ -0,0 +1,66 @@ +/* + * Copyright (C) 2000 - 2003 Jeff Dike (jdike@addtoit.com) + * Licensed under the GPL + */ + +#include "linux/sched.h" +#include "linux/shm.h" +#include "linux/ipc.h" +#include "linux/syscalls.h" +#include "asm/mman.h" +#include "asm/uaccess.h" +#include "asm/unistd.h" + +/* + * The prototype on i386 is: + * + * int clone(int flags, void * child_stack, int * parent_tidptr, struct user_desc * newtls, int * child_tidptr) + * + * and the "newtls" arg. on i386 is read by copy_thread directly from the + * register saved on the stack. + */ +long sys_clone(unsigned long clone_flags, unsigned long newsp, + int __user *parent_tid, void *newtls, int __user *child_tid) +{ + long ret; + + if (!newsp) + newsp = UPT_SP(¤t->thread.regs.regs); + + current->thread.forking = 1; + ret = do_fork(clone_flags, newsp, ¤t->thread.regs, 0, parent_tid, + child_tid); + current->thread.forking = 0; + return ret; +} + +long sys_sigaction(int sig, const struct old_sigaction __user *act, + struct old_sigaction __user *oact) +{ + struct k_sigaction new_ka, old_ka; + int ret; + + if (act) { + old_sigset_t mask; + if (!access_ok(VERIFY_READ, act, sizeof(*act)) || + __get_user(new_ka.sa.sa_handler, &act->sa_handler) || + __get_user(new_ka.sa.sa_restorer, &act->sa_restorer)) + return -EFAULT; + __get_user(new_ka.sa.sa_flags, &act->sa_flags); + __get_user(mask, &act->sa_mask); + siginitset(&new_ka.sa.sa_mask, mask); + } + + ret = do_sigaction(sig, act ? &new_ka : NULL, oact ? &old_ka : NULL); + + if (!ret && oact) { + if (!access_ok(VERIFY_WRITE, oact, sizeof(*oact)) || + __put_user(old_ka.sa.sa_handler, &oact->sa_handler) || + __put_user(old_ka.sa.sa_restorer, &oact->sa_restorer)) + return -EFAULT; + __put_user(old_ka.sa.sa_flags, &oact->sa_flags); + __put_user(old_ka.sa.sa_mask.sig[0], &oact->sa_mask); + } + + return ret; +} -- cgit v1.2.3