Cause SIGTRAP if NOTREACHED code is reached.
This commit is contained in:
parent
de80d1419e
commit
764c596c3f
@ -1,4 +1,4 @@
|
||||
/* $NetBSD: _context_u.S,v 1.3 2003/07/05 23:01:25 uwe Exp $ */
|
||||
/* $NetBSD: _context_u.S,v 1.4 2003/11/17 22:38:11 uwe Exp $ */
|
||||
|
||||
/*
|
||||
* Copyright (c) 2003 Christian P. Groessler
|
||||
@ -31,6 +31,12 @@
|
||||
#include "assym.h"
|
||||
|
||||
|
||||
/*
|
||||
* Enter debugger or die with SIGTRAP if "notreached" code is reached
|
||||
*/
|
||||
#define NOTREACHED trapa #0xc3
|
||||
|
||||
|
||||
/*
|
||||
* Only save/restore registers that are callee saved, i.e for which
|
||||
* gcc has call_used_regs[reg] == 0.
|
||||
@ -101,7 +107,7 @@
|
||||
add #(_REG_R15 * 4), r1 ; \
|
||||
jmp @r2 ; \
|
||||
mov.l @r1, r15 ; \
|
||||
/* NOTREACHED */ \
|
||||
NOTREACHED ; \
|
||||
\
|
||||
1: /* not a _UC_USER context, pass to setcontext(2) */ \
|
||||
CALL_SETCONTEXT(uc) \
|
||||
@ -117,7 +123,7 @@
|
||||
mov.l 2f, r1 ; \
|
||||
1: bsrf r1 ; \
|
||||
MAYBE_MOV_UC_R4(uc) ; \
|
||||
/* NOTREACHED */ \
|
||||
NOTREACHED ; \
|
||||
.align 2 ; \
|
||||
2: .long _C_LABEL(setcontext)-(1b+4)
|
||||
#else /* !PIC */
|
||||
@ -128,8 +134,8 @@
|
||||
#define CALL_SETCONTEXT(uc) \
|
||||
mov.l .L_setcontext, r1 ; \
|
||||
jsr @r1 ; \
|
||||
MAYBE_MOV_UC_R4(uc) \
|
||||
/* NOTREACHED */
|
||||
MAYBE_MOV_UC_R4(uc) ; \
|
||||
NOTREACHED
|
||||
#endif
|
||||
|
||||
#define MAYBE_MOV_UC_R4(uc) \
|
||||
|
Loading…
x
Reference in New Issue
Block a user