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Save/restore some global registers (sigsetjmp compatible). Does not realy 

make a difference currently, but is a hard to spot blackhole if something
ever starts using the application registers.
This commit is contained in:
martin 2011-04-30 19:43:17 +00:00
parent 44283e6e19
commit b549c67469
1 changed files with 19 additions and 2 deletions
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21
lib/libc/arch/sparc64/gen/_setjmp.S
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@ -1,4 +1,4 @@
/* $NetBSD: _setjmp.S,v 1.6 2004/12/07 08:20:07 martin Exp $ */
/* $NetBSD: _setjmp.S,v 1.7 2011/04/30 19:43:17 martin Exp $ */
/*
* Copyright (c) 1992, 1993
@ -40,10 +40,13 @@
#if 0
.asciz "@(#)_setjmp.s 8.1 (Berkeley) 6/4/93"
#else
RCSID("$NetBSD: _setjmp.S,v 1.6 2004/12/07 08:20:07 martin Exp $")
RCSID("$NetBSD: _setjmp.S,v 1.7 2011/04/30 19:43:17 martin Exp $")
#endif
#endif /* LIBC_SCCS and not lint */
.register %g2,#ignore
.register %g3,#ignore
/*
* C library -- _setjmp, _longjmp
*
@ -57,6 +60,15 @@
ENTRY(_setjmp)
stx %sp, [%o0+0] /* store caller's stack pointer */
stx %o7, [%o0+8] /* and return pc */
stx %g0, [%o0+0x18] /* mark as non-sigmask jmpbuf */
/* store globals, offsets compatible with siglongjmp */
stx %g1, [%o0+0x28]
stx %g2, [%o0+0x30] /* adjust asserts in longjmp.c */
stx %g3, [%o0+0x48] /* if you change any of these */
stx %g6, [%o0+0x50] /* offsets! */
stx %g7, [%o0+0x58]
retl
clr %o0 ! return 0
@ -68,6 +80,11 @@ ENTRY(_longjmp)
* a `restore' instruction which will reload the register
* window from the stack.
*/
ldx [%i0+0x28],%g1
ldx [%i0+0x30],%g2
ldx [%i0+0x48],%g3
ldx [%i0+0x50],%g6
ldx [%i0+0x58],%g7
ldx [%i0+8], %i7
ldx [%i0+0], %fp
mov 1, %i0