linux/arch/um/os-Linux/trap.c
Jeff Dike 13c06be399 [PATCH] uml: Use klibc setjmp/longjmp
This patch adds an implementation of setjmp and longjmp to UML, allowing
access to the inside of a jmpbuf without needing the access macros formerly
provided by libc.

The implementation is stolen from klibc.  I copy the relevant files into
arch/um.  I have another patch which avoids the copying, but requires klibc be
in the tree.

setjmp and longjmp users required some tweaking.  Includes of <setjmp.h> were
removed and includes of the UML longjmp.h were added where necessary.  There
are also replacements of siglongjmp with UML_LONGJMP which I somehow missed
earlier.

Signed-off-by: Jeff Dike <jdike@addtoit.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
2006-09-26 08:49:05 -07:00

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C

/*
* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
* Licensed under the GPL
*/
#include <stdlib.h>
#include <signal.h>
#include "kern_util.h"
#include "user_util.h"
#include "os.h"
#include "mode.h"
#include "longjmp.h"
void usr2_handler(int sig, union uml_pt_regs *regs)
{
CHOOSE_MODE(syscall_handler_tt(sig, regs), (void) 0);
}
void (*sig_info[NSIG])(int, union uml_pt_regs *);
void os_fill_handlinfo(struct kern_handlers h)
{
sig_info[SIGTRAP] = h.relay_signal;
sig_info[SIGFPE] = h.relay_signal;
sig_info[SIGILL] = h.relay_signal;
sig_info[SIGWINCH] = h.winch;
sig_info[SIGBUS] = h.bus_handler;
sig_info[SIGSEGV] = h.page_fault;
sig_info[SIGIO] = h.sigio_handler;
sig_info[SIGVTALRM] = h.timer_handler;
sig_info[SIGALRM] = h.timer_handler;
sig_info[SIGUSR2] = usr2_handler;
}
void do_longjmp(void *b, int val)
{
jmp_buf *buf = b;
UML_LONGJMP(buf, val);
}