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freebsd-nq/lib/libc/amd64/sys/cerror.S

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First crack at making libc work with the new make macros. It compiles on my machine, and a simple static (genassym) and shared (sysctl) executable both work. Still to be done: RPCand YP merge.
1994-08-05 01:19:12 +00:00
/*-
* Copyright (c) 1990 The Regents of the University of California.
* All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* William Jolitz.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 4. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
Restore CSRG ID's lost in January 1995.
2002-03-23 02:10:28 +00:00
#if defined(SYSLIBC_SCCS) && !defined(lint)
.asciz "@(#)cerror.s 5.1 (Berkeley) 4/23/90"
#endif /* SYSLIBC_SCCS and not lint */
#include <machine/asm.h>
__FBSDID("$FreeBSD$");
First crack at making libc work with the new make macros. It compiles on my machine, and a simple static (genassym) and shared (sysctl) executable both work. Still to be done: RPCand YP merge.
1994-08-05 01:19:12 +00:00
#include "SYS.h"
Add support to enable libc to be compiled in ELF format. (#ifdef __ELF__) In a nutshell, this macroizes the local/global symbol scoping rules that are different in a.out and ELF. It also makes the i386 assembler stubs conform to i386 PIC calling conventions - the a.out ld.so didn't object, but the ELF one needs it as it implements PIC jumps via PLT's as well as calls. The a.out rtld only worked because it was accidently snooping the grandparent calling function's return address off the stack.. This also affects the libc_r code a little, because of cpp macro nesting.
1996-05-05 07:56:21 +00:00
.globl HIDENAME(cerror)
Reviewed by: julian and (hsu?) Submitted by: John Birrel(L?) changes for threadsafe operations
1996-01-22 00:02:33 +00:00
/*
Make cerror thread aware by calling __error() to get a pointer to the thread-specific error variable. This change make libc use the same cerror code that libc_r has been using.
1998-04-30 09:32:48 +00:00
* The __error() function is thread aware. For non-threaded
* programs and the initial threaded in threaded programs,
* it returns a pointer to the global errno variable.
Reviewed by: julian and (hsu?) Submitted by: John Birrel(L?) changes for threadsafe operations
1996-01-22 00:02:33 +00:00
*/
Add support to enable libc to be compiled in ELF format. (#ifdef __ELF__) In a nutshell, this macroizes the local/global symbol scoping rules that are different in a.out and ELF. It also makes the i386 assembler stubs conform to i386 PIC calling conventions - the a.out ld.so didn't object, but the ELF one needs it as it implements PIC jumps via PLT's as well as calls. The a.out rtld only worked because it was accidently snooping the grandparent calling function's return address off the stack.. This also affects the libc_r code a little, because of cpp macro nesting.
1996-05-05 07:56:21 +00:00
.globl CNAME(__error)
.type CNAME(__error),@function
HIDENAME(cerror):
Update for AMD64 after repocopy from i386/sys/*. This means: - strip out the nasty PIC_PROLOGUE/EPILOGUE stuff, since we dont have to lose a register in PIC mode anymore (we use %rip-relative addressing). - update for C register argument passing conventions. - convert 32 bit to 64 bit register sizes etc.
2003-04-30 18:16:33 +00:00
pushq %rax
Add support to enable libc to be compiled in ELF format. (#ifdef __ELF__) In a nutshell, this macroizes the local/global symbol scoping rules that are different in a.out and ELF. It also makes the i386 assembler stubs conform to i386 PIC calling conventions - the a.out ld.so didn't object, but the ELF one needs it as it implements PIC jumps via PLT's as well as calls. The a.out rtld only worked because it was accidently snooping the grandparent calling function's return address off the stack.. This also affects the libc_r code a little, because of cpp macro nesting.
1996-05-05 07:56:21 +00:00
call PIC_PLT(CNAME(__error))
Update for AMD64 after repocopy from i386/sys/*. This means: - strip out the nasty PIC_PROLOGUE/EPILOGUE stuff, since we dont have to lose a register in PIC mode anymore (we use %rip-relative addressing). - update for C register argument passing conventions. - convert 32 bit to 64 bit register sizes etc.
2003-04-30 18:16:33 +00:00
popq %rcx
Do not try to store 64 bits into 32 bit errno variable. With the changed libc data layout, this was corrupting _PathLocale variable leading to programs dumping core in non-default locales.
2005-04-21 12:47:08 +00:00
movl %ecx,(%rax)
Update for AMD64 after repocopy from i386/sys/*. This means: - strip out the nasty PIC_PROLOGUE/EPILOGUE stuff, since we dont have to lose a register in PIC mode anymore (we use %rip-relative addressing). - update for C register argument passing conventions. - convert 32 bit to 64 bit register sizes etc.
2003-04-30 18:16:33 +00:00
movq $-1,%rax
movq $-1,%rdx
Reviewed by: julian and (hsu?) Submitted by: John Birrel(L?) changes for threadsafe operations
1996-01-22 00:02:33 +00:00
ret
Add section .note.GNU-stack for assembly files used by 386 and amd64.
2011-01-07 16:08:40 +00:00
.section .note.GNU-stack,"",%progbits
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