23cd96d8ce
setjmp() gets the jmp_buf pointer from the wrong place (the place
where the return address is) in the shlib case, and uses it (only)
to fetch the current signal mask to address (return_address + 28).
This address is normally read-only (I hope), so the sigprocmask()
call has no effect except to return an error code.
\end{quote}
Submitted by: bde
112 lines
3.3 KiB
ArmAsm
112 lines
3.3 KiB
ArmAsm
/*-
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* Copyright (c) 1990 The Regents of the University of California.
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* All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* William Jolitz.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. All advertising materials mentioning features or use of this software
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* must display the following acknowledgement:
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* This product includes software developed by the University of
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* California, Berkeley and its contributors.
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* 4. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* $FreeBSD$
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*/
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#if defined(LIBC_RCS) && !defined(lint)
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.text
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.asciz "$FreeBSD$"
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#endif /* LIBC_RCS and not lint */
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/*
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* C library -- _setjmp, _longjmp
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*
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* longjmp(a,v)
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* will generate a "return(v)" from the last call to
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* setjmp(a)
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* by restoring registers from the environment 'a'.
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* The previous signal state is restored.
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*/
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#include "DEFS.h"
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#include "SYS.h"
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ENTRY(setjmp)
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movl 4(%esp),%ecx
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PIC_PROLOGUE
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leal 28(%ecx), %eax
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pushl %eax /* (sigset_t*)oset */
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pushl $0 /* (sigset_t*)set */
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pushl $1 /* SIG_BLOCK */
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#ifdef _THREAD_SAFE
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call PIC_PLT(CNAME(_thread_sys_sigprocmask))
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#else
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call PIC_PLT(CNAME(sigprocmask))
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#endif
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addl $12,%esp
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PIC_EPILOGUE
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movl 4(%esp),%ecx
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movl 0(%esp),%edx
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movl %edx, 0(%ecx)
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movl %ebx, 4(%ecx)
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movl %esp, 8(%ecx)
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movl %ebp,12(%ecx)
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movl %esi,16(%ecx)
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movl %edi,20(%ecx)
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fnstcw 24(%ecx)
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xorl %eax,%eax
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ret
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ENTRY(longjmp)
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movl 4(%esp),%edx
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PIC_PROLOGUE
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pushl $0 /* (sigset_t*)oset */
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leal 28(%edx), %eax
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pushl %eax /* (sigset_t*)set */
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pushl $3 /* SIG_SETMASK */
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#ifdef _THREAD_SAFE
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call PIC_PLT(CNAME(_thread_sys_sigprocmask))
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#else
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call PIC_PLT(CNAME(sigprocmask))
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#endif
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addl $12,%esp
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PIC_EPILOGUE
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movl 4(%esp),%edx
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movl 8(%esp),%eax
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movl 0(%edx),%ecx
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movl 4(%edx),%ebx
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movl 8(%edx),%esp
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movl 12(%edx),%ebp
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movl 16(%edx),%esi
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movl 20(%edx),%edi
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fninit
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fldcw 24(%edx)
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testl %eax,%eax
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jnz 1f
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incl %eax
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1: movl %ecx,0(%esp)
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ret
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