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freebsd-skq/lib/csu/i386/crt1_c.c

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make these more useful for lint(1). Minor diff-reductions while I'm about it.
2003-01-26 23:14:47 +00:00
/* LINTLIBRARY */
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
/*-
* Copyright 1996-1998 John D. Polstra.
* All rights reserved.
*
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
Properly support -fPIE by linking PIE binaries with specially-built Scrt1.o instead of crt1.o, since the later is built as non-PIC. Separate i386-elf crt1.c into the pure assembler part and C code, supplying all data extracted by assembler stub as explicit parameters [1]. Hide and localize _start1 symbol used as an interface between asm and C code. In collaboration with: kan Inspired by: PR i386/127387 [1] Prodded and tested by: rdivacky [1] MFC after: 3 weeks
2009-12-02 16:34:20 +00:00
*
* $FreeBSD$
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
*/
Let all .c and .S files under lib/csu consistently use the __FBSDID() macro for identification, instead of several different hand-rolled variants (plain .ident, .ascii, etc).
2010-12-09 21:31:21 +00:00
#include <sys/cdefs.h>
__FBSDID("$FreeBSD$");
The main reason for this is to reduce diffs between all the crt1.c's. Assembler macros are tidied up and made as similar as sanely possible. The macros are translated into C (__inline static) functions for lint. Declaration orders are made the same. Declarations are all ISOfied and tidied up. Comment contents have gratuitous diffs removed. The net result is a bunch of crt1.c's that are 90% the same. It may be possible to now encapsulate the differences in one MD header, and have only one MI crt1.c file (although the macros to do this may be ugly). Helpful comments by: obrien, bde Alpha tested by: des i386-elf tested by: markm
2002-07-16 12:28:50 +00:00
#ifndef lint
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
#ifndef __GNUC__
#error "GCC is needed to compile this file"
#endif
The main reason for this is to reduce diffs between all the crt1.c's. Assembler macros are tidied up and made as similar as sanely possible. The macros are translated into C (__inline static) functions for lint. Declaration orders are made the same. Declarations are all ISOfied and tidied up. Comment contents have gratuitous diffs removed. The net result is a bunch of crt1.c's that are 90% the same. It may be possible to now encapsulate the differences in one MD header, and have only one MI crt1.c file (although the macros to do this may be ugly). Helpful comments by: obrien, bde Alpha tested by: des i386-elf tested by: markm
2002-07-16 12:28:50 +00:00
#endif /* lint */
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
#include <stdlib.h>
Whitespace diffs only; this brings this file into the same whitespace convention as src/lib/csu/*/crt1.c. This will make the follow up diffs easier to see and extract.
2002-07-03 14:42:39 +00:00
Do not use __progname directly (except in [gs]etprogname(3)). Also, make an internal _getprogname() that is used only inside libc. For libc, getprogname(3) is a weak symbol in case a function of the same name is defined in userland.
2002-03-29 22:43:43 +00:00
#include "libc_private.h"
* Bring back the guts of crt{i,n}.S. This allows C++ exceptions to work when using the egcs and gcc-devel ports, along with GCC built from stock public FSF sources. With out this change, FreeBSD will be removed from the list of systems GCC 3.0 must be evaluated on before release. With the effort some of us put into getting FreeBSD on this list, we should not turn this effort into a waste, else we might not be worth fighting for in the future. (note that Alpha and IA-64 versions of crt{i,n}.S are needed) * Switch from our own crt{begin,in} to those created from GCC's crtstuff.c. This will allow us to switch to DWARF2 exceptions in the future, along with staying in sync with any future GCC requirements. * Break out our ELF branding bits into a seperate file. Currently this is now included by our crt1.c files (since this functionality was part of our native crtbegin.c). Later crtbrand.o will be merged in the creation of crti.o.
2000-10-28 21:26:48 +00:00
#include "crtbrand.c"
Stop calling _init/_fini methods from crt1 for dynamic binaries. Do call preinit, init and fini arrays methods from crt1 for static binaries. Mark new crt1 with FreeBSD-specific ELF note. Move some common crt1 code into new MI file ignore_init.c, to reduce duplication. Also, conservatively adjust nearby sources for style. Reviewed by: kan Tested by: andrew (arm), flo (sparc64) MFC after: 3 weeks
2012-03-11 20:04:09 +00:00
#include "ignore_init.c"
The main reason for this is to reduce diffs between all the crt1.c's. Assembler macros are tidied up and made as similar as sanely possible. The macros are translated into C (__inline static) functions for lint. Declaration orders are made the same. Declarations are all ISOfied and tidied up. Comment contents have gratuitous diffs removed. The net result is a bunch of crt1.c's that are 90% the same. It may be possible to now encapsulate the differences in one MD header, and have only one MI crt1.c file (although the macros to do this may be ugly). Helpful comments by: obrien, bde Alpha tested by: des i386-elf tested by: markm
2002-07-16 12:28:50 +00:00
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
typedef void (*fptr)(void);
The main reason for this is to reduce diffs between all the crt1.c's. Assembler macros are tidied up and made as similar as sanely possible. The macros are translated into C (__inline static) functions for lint. Declaration orders are made the same. Declarations are all ISOfied and tidied up. Comment contents have gratuitous diffs removed. The net result is a bunch of crt1.c's that are 90% the same. It may be possible to now encapsulate the differences in one MD header, and have only one MI crt1.c file (although the macros to do this may be ugly). Helpful comments by: obrien, bde Alpha tested by: des i386-elf tested by: markm
2002-07-16 12:28:50 +00:00
extern void _start(char *, ...);
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
Make profiling work for ELF. gprof now autodetects the format of the executable file, so it will work for both a.out and ELF format files. I have split the object format specific code into separate source files. It's cleaner than it was before, but it's still pretty crufty. Don't cheat on your make world for this update. A lot of things have to be rebuilt for it to work, including the compiler and all of the profiled libraries.
1998-09-07 23:32:00 +00:00
#ifdef GCRT
extern void _mcleanup(void);
extern void monstartup(void *, void *);
extern int eprol;
extern int etext;
#endif
Properly support -fPIE by linking PIE binaries with specially-built Scrt1.o instead of crt1.o, since the later is built as non-PIC. Separate i386-elf crt1.c into the pure assembler part and C code, supplying all data extracted by assembler stub as explicit parameters [1]. Hide and localize _start1 symbol used as an interface between asm and C code. In collaboration with: kan Inspired by: PR i386/127387 [1] Prodded and tested by: rdivacky [1] MFC after: 3 weeks
2009-12-02 16:34:20 +00:00
void _start1(fptr, int, char *[]) __dead2;
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
Properly support -fPIE by linking PIE binaries with specially-built Scrt1.o instead of crt1.o, since the later is built as non-PIC. Separate i386-elf crt1.c into the pure assembler part and C code, supplying all data extracted by assembler stub as explicit parameters [1]. Hide and localize _start1 symbol used as an interface between asm and C code. In collaboration with: kan Inspired by: PR i386/127387 [1] Prodded and tested by: rdivacky [1] MFC after: 3 weeks
2009-12-02 16:34:20 +00:00
/* The entry function, C part. */
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
void
Properly support -fPIE by linking PIE binaries with specially-built Scrt1.o instead of crt1.o, since the later is built as non-PIC. Separate i386-elf crt1.c into the pure assembler part and C code, supplying all data extracted by assembler stub as explicit parameters [1]. Hide and localize _start1 symbol used as an interface between asm and C code. In collaboration with: kan Inspired by: PR i386/127387 [1] Prodded and tested by: rdivacky [1] MFC after: 3 weeks
2009-12-02 16:34:20 +00:00
_start1(fptr cleanup, int argc, char *argv[])
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
{
Whitespace diffs only; this brings this file into the same whitespace convention as src/lib/csu/*/crt1.c. This will make the follow up diffs easier to see and extract.
2002-07-03 14:42:39 +00:00
char **env;
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
Whitespace diffs only; this brings this file into the same whitespace convention as src/lib/csu/*/crt1.c. This will make the follow up diffs easier to see and extract.
2002-07-03 14:42:39 +00:00
env = argv + argc + 1;
Only assign the environ in the startup code when environ is NULL. Preloaded library could have changed the environment, and unconditional assingment to the environ undoes the customization. The binaries needs to be recompiled to get the fix. Move the common code to set up environ and __progname into the helper. Note that ia64 possibly not fixed, due to it still using old csu. Reported and tested by: John Hein <jhein@symmetricom.com> Reviewed by: kan, scf Approved by: secteam (simon) MFC after: 2 weeks
2013-01-07 17:58:27 +00:00
handle_argv(argc, argv, env);
Whitespace diffs only; this brings this file into the same whitespace convention as src/lib/csu/*/crt1.c. This will make the follow up diffs easier to see and extract.
2002-07-03 14:42:39 +00:00
if (&_DYNAMIC != NULL)
The main reason for this is to reduce diffs between all the crt1.c's. Assembler macros are tidied up and made as similar as sanely possible. The macros are translated into C (__inline static) functions for lint. Declaration orders are made the same. Declarations are all ISOfied and tidied up. Comment contents have gratuitous diffs removed. The net result is a bunch of crt1.c's that are 90% the same. It may be possible to now encapsulate the differences in one MD header, and have only one MI crt1.c file (although the macros to do this may be ugly). Helpful comments by: obrien, bde Alpha tested by: des i386-elf tested by: markm
2002-07-16 12:28:50 +00:00
atexit(cleanup);
Add support for TLS in statically linked programs.
2004-08-15 16:18:52 +00:00
else
_init_tls();
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
Make profiling work for ELF. gprof now autodetects the format of the executable file, so it will work for both a.out and ELF format files. I have split the object format specific code into separate source files. It's cleaner than it was before, but it's still pretty crufty. Don't cheat on your make world for this update. A lot of things have to be rebuilt for it to work, including the compiler and all of the profiled libraries.
1998-09-07 23:32:00 +00:00
#ifdef GCRT
Whitespace diffs only; this brings this file into the same whitespace convention as src/lib/csu/*/crt1.c. This will make the follow up diffs easier to see and extract.
2002-07-03 14:42:39 +00:00
atexit(_mcleanup);
monstartup(&eprol, &etext);
Fixed profiling of main() for amd64 and i386. This started rotting in 1993 in rev.1.5 of the i386 a.out version (csu/i386/crt0.c). Profiling uses a magic label "eprol" to delimit the start of the part of the text section covered by profiling. This label must be placed before the call to main() to get main() properly profiled. It was placed there in rev.1.1 of crt0.c. Rev.1.5 imported the initial implementation of shared libraries in FreeBSD and misplaced the label. Fortunately, the misplaced label was misspelled and the old label wasn't removed, so the new label had no effect. Unfortunately, when profiling was implemented for the ELF in 1998 in rev.1.2 of csu/i386-elf/crt1.c, only the incorrectly placed label was copied (after fixing its name). The bug was then copied to all other arches. The label seems to be still misplaced in NetBSD for most arches. It is in common.c for most arches so it is even further from being inside the function that calls main(). I think "eprol" is short for "end of prologue", but it must be placed before the end of the prologue so that it covers main(). crt0.c has it before the calls atexit(_mcleanup) and monstartup(...), but it cannot affect these calls so I moved it after the call to monstartup(). It now also covers the call to _init() but not the newer call to _init_tls(). Profiling of _init() seems to be harmless, and the call to _init_tls() seems to be misplaced. Reviewed by: jdp (long ago, for a slightly different i386 version)
2005-10-07 22:13:17 +00:00
__asm__("eprol:");
Make profiling work for ELF. gprof now autodetects the format of the executable file, so it will work for both a.out and ELF format files. I have split the object format specific code into separate source files. It's cleaner than it was before, but it's still pretty crufty. Don't cheat on your make world for this update. A lot of things have to be rebuilt for it to work, including the compiler and all of the profiled libraries.
1998-09-07 23:32:00 +00:00
#endif
Stop calling _init/_fini methods from crt1 for dynamic binaries. Do call preinit, init and fini arrays methods from crt1 for static binaries. Mark new crt1 with FreeBSD-specific ELF note. Move some common crt1 code into new MI file ignore_init.c, to reduce duplication. Also, conservatively adjust nearby sources for style. Reviewed by: kan Tested by: andrew (arm), flo (sparc64) MFC after: 3 weeks
2012-03-11 20:04:09 +00:00
handle_static_init(argc, argv, env);
exit(main(argc, argv, env));
Import C startup files for ELF support. Submitted by: John Polstra <jdp@polstra.com>
1998-03-07 20:27:11 +00:00
}
Make profiling work for ELF. gprof now autodetects the format of the executable file, so it will work for both a.out and ELF format files. I have split the object format specific code into separate source files. It's cleaner than it was before, but it's still pretty crufty. Don't cheat on your make world for this update. A lot of things have to be rebuilt for it to work, including the compiler and all of the profiled libraries.
1998-09-07 23:32:00 +00:00
Properly support -fPIE by linking PIE binaries with specially-built Scrt1.o instead of crt1.o, since the later is built as non-PIC. Separate i386-elf crt1.c into the pure assembler part and C code, supplying all data extracted by assembler stub as explicit parameters [1]. Hide and localize _start1 symbol used as an interface between asm and C code. In collaboration with: kan Inspired by: PR i386/127387 [1] Prodded and tested by: rdivacky [1] MFC after: 3 weeks
2009-12-02 16:34:20 +00:00
__asm(".hidden _start1");
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