13c06be399
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>
41 lines
895 B
C
41 lines
895 B
C
/*
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* Copyright (C) 2000, 2001, 2002 Jeff Dike (jdike@karaya.com)
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* Licensed under the GPL
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*/
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#include <stdlib.h>
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#include <signal.h>
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#include "kern_util.h"
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#include "user_util.h"
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#include "os.h"
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#include "mode.h"
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#include "longjmp.h"
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void usr2_handler(int sig, union uml_pt_regs *regs)
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{
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CHOOSE_MODE(syscall_handler_tt(sig, regs), (void) 0);
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}
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void (*sig_info[NSIG])(int, union uml_pt_regs *);
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void os_fill_handlinfo(struct kern_handlers h)
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{
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sig_info[SIGTRAP] = h.relay_signal;
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sig_info[SIGFPE] = h.relay_signal;
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sig_info[SIGILL] = h.relay_signal;
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sig_info[SIGWINCH] = h.winch;
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sig_info[SIGBUS] = h.bus_handler;
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sig_info[SIGSEGV] = h.page_fault;
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sig_info[SIGIO] = h.sigio_handler;
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sig_info[SIGVTALRM] = h.timer_handler;
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sig_info[SIGALRM] = h.timer_handler;
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sig_info[SIGUSR2] = usr2_handler;
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}
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void do_longjmp(void *b, int val)
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{
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jmp_buf *buf = b;
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UML_LONGJMP(buf, val);
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}
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