60 lines
1.5 KiB
C
Executable file
60 lines
1.5 KiB
C
Executable file
#include <lib.h>
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#define sigfillset _sigfillset
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#define sigjmp _sigjmp
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#define sigprocmask _sigprocmask
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#define sigreturn _sigreturn
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#include <sys/sigcontext.h>
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#include <setjmp.h>
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#include <signal.h>
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_PROTOTYPE( int sigjmp, (jmp_buf jb, int retval));
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#if (_SETJMP_SAVES_REGS == 0)
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/* 'sigreturn' using a short format jmp_buf (no registers saved). */
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PUBLIC int sigjmp(jb, retval)
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jmp_buf jb;
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int retval;
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{
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struct sigcontext sc;
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sc.sc_flags = jb[0].__flags;
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sc.sc_mask = jb[0].__mask;
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#if (CHIP == INTEL)
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sc.sc_pc = (int) jb[0].__pc;
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sc.sc_sp = (int) jb[0].__sp;
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sc.sc_fp = (int) jb[0].__lb;
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#endif
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#if (CHIP == M68000)
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sc.sc_pc = (long) jb[0].__pc;
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sc.sc_sp = (long) jb[0].__sp;
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sc.sc_fp = (long) jb[0].__lb;
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#endif
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sc.sc_retreg = retval;
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return sigreturn(&sc);
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}
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#endif
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PUBLIC int sigreturn(scp)
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register struct sigcontext *scp;
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{
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sigset_t set;
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/* The message can't be on the stack, because the stack will vanish out
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* from under us. The send part of sendrec will succeed, but when
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* a message is sent to restart the current process, who knows what will
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* be in the place formerly occupied by the message?
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*/
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static message m;
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/* Protect against race conditions by blocking all interrupts. */
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sigfillset(&set); /* splhi */
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sigprocmask(SIG_SETMASK, &set, (sigset_t *) NULL);
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m.m2_l1 = scp->sc_mask;
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m.m2_i2 = scp->sc_flags;
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m.m2_p1 = (char *) scp;
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return(_syscall(MM, SIGRETURN, &m)); /* normally this doesn't return */
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}
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