mirror of
https://github.com/FEX-Emu/linux.git
synced 2024-12-20 00:11:22 +00:00
0f80bc85c5
The serial UML OS-abstraction layer patch (um/kernel dir). This moves all system calls from mem_user.c and tempfile.c files under os-Linux dir. Signed-off-by: Gennady Sharapov <Gennady.V.Sharapov@intel.com> Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
128 lines
2.7 KiB
C
128 lines
2.7 KiB
C
/*
|
|
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
|
|
* Licensed under the GPL
|
|
*/
|
|
|
|
#include <stdio.h>
|
|
#include <unistd.h>
|
|
#include <signal.h>
|
|
#include <sched.h>
|
|
#include <errno.h>
|
|
#include <stdarg.h>
|
|
#include <stdlib.h>
|
|
#include <setjmp.h>
|
|
#include <sys/time.h>
|
|
#include <sys/ptrace.h>
|
|
#include <linux/ptrace.h>
|
|
#include <sys/wait.h>
|
|
#include <sys/mman.h>
|
|
#include <asm/ptrace.h>
|
|
#include <asm/unistd.h>
|
|
#include <asm/page.h>
|
|
#include "user_util.h"
|
|
#include "kern_util.h"
|
|
#include "user.h"
|
|
#include "signal_kern.h"
|
|
#include "signal_user.h"
|
|
#include "sysdep/ptrace.h"
|
|
#include "sysdep/sigcontext.h"
|
|
#include "irq_user.h"
|
|
#include "ptrace_user.h"
|
|
#include "time_user.h"
|
|
#include "init.h"
|
|
#include "os.h"
|
|
#include "uml-config.h"
|
|
#include "choose-mode.h"
|
|
#include "mode.h"
|
|
#include "tempfile.h"
|
|
|
|
int protect_memory(unsigned long addr, unsigned long len, int r, int w, int x,
|
|
int must_succeed)
|
|
{
|
|
int err;
|
|
|
|
err = os_protect_memory((void *) addr, len, r, w, x);
|
|
if(err < 0){
|
|
if(must_succeed)
|
|
panic("protect failed, err = %d", -err);
|
|
else return(err);
|
|
}
|
|
return(0);
|
|
}
|
|
|
|
/*
|
|
*-------------------------
|
|
* only for tt mode (will be deleted in future...)
|
|
*-------------------------
|
|
*/
|
|
|
|
struct tramp {
|
|
int (*tramp)(void *);
|
|
void *tramp_data;
|
|
unsigned long temp_stack;
|
|
int flags;
|
|
int pid;
|
|
};
|
|
|
|
/* See above for why sigkill is here */
|
|
|
|
int sigkill = SIGKILL;
|
|
|
|
int outer_tramp(void *arg)
|
|
{
|
|
struct tramp *t;
|
|
int sig = sigkill;
|
|
|
|
t = arg;
|
|
t->pid = clone(t->tramp, (void *) t->temp_stack + page_size()/2,
|
|
t->flags, t->tramp_data);
|
|
if(t->pid > 0) wait_for_stop(t->pid, SIGSTOP, PTRACE_CONT, NULL);
|
|
kill(os_getpid(), sig);
|
|
_exit(0);
|
|
}
|
|
|
|
int start_fork_tramp(void *thread_arg, unsigned long temp_stack,
|
|
int clone_flags, int (*tramp)(void *))
|
|
{
|
|
struct tramp arg;
|
|
unsigned long sp;
|
|
int new_pid, status, err;
|
|
|
|
/* The trampoline will run on the temporary stack */
|
|
sp = stack_sp(temp_stack);
|
|
|
|
clone_flags |= CLONE_FILES | SIGCHLD;
|
|
|
|
arg.tramp = tramp;
|
|
arg.tramp_data = thread_arg;
|
|
arg.temp_stack = temp_stack;
|
|
arg.flags = clone_flags;
|
|
|
|
/* Start the process and wait for it to kill itself */
|
|
new_pid = clone(outer_tramp, (void *) sp, clone_flags, &arg);
|
|
if(new_pid < 0)
|
|
return(new_pid);
|
|
|
|
CATCH_EINTR(err = waitpid(new_pid, &status, 0));
|
|
if(err < 0)
|
|
panic("Waiting for outer trampoline failed - errno = %d",
|
|
errno);
|
|
|
|
if(!WIFSIGNALED(status) || (WTERMSIG(status) != SIGKILL))
|
|
panic("outer trampoline didn't exit with SIGKILL, "
|
|
"status = %d", status);
|
|
|
|
return(arg.pid);
|
|
}
|
|
|
|
void forward_pending_sigio(int target)
|
|
{
|
|
sigset_t sigs;
|
|
|
|
if(sigpending(&sigs))
|
|
panic("forward_pending_sigio : sigpending failed");
|
|
if(sigismember(&sigs, SIGIO))
|
|
kill(target, SIGIO);
|
|
}
|
|
|