097fdf06c6
Some fixes to make softints work in tt mode. Signed-off-by: Jeff Dike <jdike@addtoit.com> Cc: Paolo 'Blaisorblade' Giarrusso <blaisorblade@yahoo.it> Signed-off-by: Andrew Morton <akpm@osdl.org> Signed-off-by: Linus Torvalds <torvalds@osdl.org>
72 lines
1.7 KiB
C
72 lines
1.7 KiB
C
/*
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* Copyright (C) 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 <errno.h>
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#include <signal.h>
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#include "sysdep/ptrace.h"
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#include "sysdep/sigcontext.h"
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#include "user_util.h"
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#include "kern_util.h"
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#include "task.h"
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#include "tt.h"
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#include "os.h"
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void sig_handler_common_tt(int sig, void *sc_ptr)
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{
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struct sigcontext *sc = sc_ptr;
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struct tt_regs save_regs, *r;
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int save_errno = errno, is_user = 0;
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void (*handler)(int, union uml_pt_regs *);
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/* This is done because to allow SIGSEGV to be delivered inside a SEGV
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* handler. This can happen in copy_user, and if SEGV is disabled,
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* the process will die.
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*/
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if(sig == SIGSEGV)
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change_sig(SIGSEGV, 1);
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r = &TASK_REGS(get_current())->tt;
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if ( sig == SIGFPE || sig == SIGSEGV ||
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sig == SIGBUS || sig == SIGILL ||
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sig == SIGTRAP ) {
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GET_FAULTINFO_FROM_SC(r->faultinfo, sc);
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}
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save_regs = *r;
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if (sc)
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is_user = user_context(SC_SP(sc));
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r->sc = sc;
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if(sig != SIGUSR2)
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r->syscall = -1;
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handler = sig_info[sig];
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/* unblock SIGALRM, SIGVTALRM, SIGIO if sig isn't IRQ signal */
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if (sig != SIGIO && sig != SIGWINCH &&
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sig != SIGVTALRM && sig != SIGALRM)
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unblock_signals();
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handler(sig, (union uml_pt_regs *) r);
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if(is_user){
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interrupt_end();
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block_signals();
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set_user_mode(NULL);
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}
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*r = save_regs;
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errno = save_errno;
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}
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/*
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* Overrides for Emacs so that we follow Linus's tabbing style.
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* Emacs will notice this stuff at the end of the file and automatically
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* adjust the settings for this buffer only. This must remain at the end
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* of the file.
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* ---------------------------------------------------------------------------
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* Local variables:
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* c-file-style: "linux"
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* End:
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*/
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