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Explain the stack layout correctly now that that I understand it :-)

This commit is contained in:
christos 2003-10-27 02:33:06 +00:00
parent ecb9893b78
commit 5f4474073a
1 changed files with 6 additions and 7 deletions
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13
lib/libc/arch/sparc64/sys/__sigtramp2.S
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@ -1,4 +1,4 @@
/* $NetBSD: __sigtramp2.S,v 1.1 2003/10/27 00:45:36 christos Exp $ */
/* $NetBSD: __sigtramp2.S,v 1.2 2003/10/27 02:33:06 christos Exp $ */
/*-
* Copyright (c) 2003 The NetBSD Foundation, Inc.
@ -38,25 +38,24 @@
#include <machine/asm.h>
#if defined(SYSLIBC_SCCS) && !defined(lint)
RCSID("$NetBSD: __sigtramp2.S,v 1.1 2003/10/27 00:45:36 christos Exp $")
RCSID("$NetBSD: __sigtramp2.S,v 1.2 2003/10/27 02:33:06 christos Exp $")
#endif /* SYSLIBC_SCCS and not lint */
#include "SYS.h"
#define _LOCORE
#include <sparc/frame.h> /* BIAS */
#include <sparc/frame.h> /* BIAS, CC64FSZ */
/*
* When this code is run, the stack looks like:
* [%sp + BIAS] struct frame
* [%sp + BIAS + 48] ???
* [%sp + BIAS + 128] siginfo_t
* [%sp + BIAS + 128 + 128] ucontext_t
* [%sp + BIAS + CC64FSZ] siginfo_t
* [%sp + BIAS + CC64FSZ + 128] ucontext_t
* .
* .
*/
ENTRY_NOPROFILE(__sigtramp_siginfo_2)
add %sp, 48 + 128 + 128 + BIAS, %o0 /* get pointer to ucontext */
add %sp, BIAS + CC64FSZ + 128, %o0 /* get pointer to ucontext */
mov SYS_setcontext, %g1
t ST_SYSCALL /* call setcontext */
mov SYS_exit, %g1 /* exit with errno */