diff options
Diffstat (limited to 'arch/um/sys-i386')
-rw-r--r-- | arch/um/sys-i386/Makefile | 2 | ||||
-rw-r--r-- | arch/um/sys-i386/signal.c | 2 | ||||
-rw-r--r-- | arch/um/sys-i386/syscalls.c | 23 | ||||
-rw-r--r-- | arch/um/sys-i386/unmap.c | 25 |
4 files changed, 32 insertions, 20 deletions
diff --git a/arch/um/sys-i386/Makefile b/arch/um/sys-i386/Makefile index 4351e5605506..095bcdb0b9cc 100644 --- a/arch/um/sys-i386/Makefile +++ b/arch/um/sys-i386/Makefile @@ -17,3 +17,5 @@ highmem.c-dir = mm module.c-dir = kernel subdir- := util + +include arch/um/scripts/Makefile.unmap diff --git a/arch/um/sys-i386/signal.c b/arch/um/sys-i386/signal.c index 03913ca5d256..4efc69a039d7 100644 --- a/arch/um/sys-i386/signal.c +++ b/arch/um/sys-i386/signal.c @@ -312,7 +312,7 @@ long sys_sigreturn(struct pt_regs regs) unsigned long __user *extramask = frame->extramask; int sig_size = (_NSIG_WORDS - 1) * sizeof(unsigned long); - if(copy_from_user(&set.sig[0], oldmask, sizeof(&set.sig[0])) || + if(copy_from_user(&set.sig[0], oldmask, sizeof(set.sig[0])) || copy_from_user(&set.sig[1], extramask, sig_size)) goto segfault; diff --git a/arch/um/sys-i386/syscalls.c b/arch/um/sys-i386/syscalls.c index 335e2d89504d..83e9be820a86 100644 --- a/arch/um/sys-i386/syscalls.c +++ b/arch/um/sys-i386/syscalls.c @@ -69,15 +69,11 @@ long sys_clone(unsigned long clone_flags, unsigned long newsp, { long ret; - /* XXX: normal arch do here this pass, and also pass the regs to - * do_fork, instead of NULL. Currently the arch-independent code - * ignores these values, while the UML code (actually it's - * copy_thread) does the right thing. But this should change, - probably. */ - /*if (!newsp) - newsp = UPT_SP(current->thread.regs);*/ + if (!newsp) + newsp = UPT_SP(¤t->thread.regs.regs); current->thread.forking = 1; - ret = do_fork(clone_flags, newsp, NULL, 0, parent_tid, child_tid); + ret = do_fork(clone_flags, newsp, ¤t->thread.regs, 0, parent_tid, + child_tid); current->thread.forking = 0; return(ret); } @@ -197,14 +193,3 @@ long sys_sigaction(int sig, const struct old_sigaction __user *act, return ret; } - -/* - * Overrides for Emacs so that we follow Linus's tabbing style. - * Emacs will notice this stuff at the end of the file and automatically - * adjust the settings for this buffer only. This must remain at the end - * of the file. - * --------------------------------------------------------------------------- - * Local variables: - * c-file-style: "linux" - * End: - */ diff --git a/arch/um/sys-i386/unmap.c b/arch/um/sys-i386/unmap.c new file mode 100644 index 000000000000..136875263d27 --- /dev/null +++ b/arch/um/sys-i386/unmap.c @@ -0,0 +1,25 @@ +/* + * Copyright (C) 2000 Jeff Dike (jdike@karaya.com) + * Licensed under the GPL + */ + +#include <linux/mman.h> +#include <asm/unistd.h> + +static int errno; + +static inline _syscall2(int,munmap,void *,start,size_t,len) +static inline _syscall6(void *,mmap2,void *,addr,size_t,len,int,prot,int,flags,int,fd,off_t,offset) +int switcheroo(int fd, int prot, void *from, void *to, int size) +{ + if(munmap(to, size) < 0){ + return(-1); + } + if(mmap2(to, size, prot, MAP_SHARED | MAP_FIXED, fd, 0) != to){ + return(-1); + } + if(munmap(from, size) < 0){ + return(-1); + } + return(0); +} |