libc: add openbsd libc startup code for 7.8

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Alex Rønne Petersen 2025-12-01 00:21:12 +01:00
parent f96aeeb7dd
commit 476b21a05a
No known key found for this signature in database
13 changed files with 1009 additions and 0 deletions

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/* $OpenBSD: md_init.h,v 1.12 2023/11/18 16:26:16 deraadt Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\" \n" \
" bl " #func " \n" \
" .previous")
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",%progbits \n" \
" .globl " #entry_pt " \n" \
" .type " #entry_pt ",%function \n" \
" .align 4 \n" \
#entry_pt": \n" \
" bti c \n" \
" sub sp, sp, #16 \n" \
" str lr, [sp] \n" \
" /* fall thru */ \n" \
" .previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",%progbits \n" \
" ldr lr, [sp] \n" \
" add sp, sp, #16 \n" \
" ret \n" \
" .previous")
#define MD_CRT0_START \
__asm( \
".text \n" \
" .align 0 \n" \
" .globl _start \n" \
" .globl __start \n" \
"_start: \n" \
"__start: \n" \
" bti c \n" \
" mov x3, x2 /* cleanup */ \n" \
"/* Get argc/argv/envp from stack */ \n" \
" ldr x0, [sp] \n" \
" add x1, sp, #0x0008 \n" \
" add x2, x1, x0, lsl #3 \n" \
" add x2, x2, #0x0008 \n" \
" \n" \
" b ___start \n" \
".previous");
/* zig patch: no static crt support */

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/* $OpenBSD: md_init.h,v 1.11 2023/11/18 16:26:16 deraadt Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\"\n" \
" call " #func "\n" \
" .previous")
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" .globl " #entry_pt " \n" \
" .type " #entry_pt ",@function \n" \
" .align 16 \n" \
#entry_pt": \n" \
" endbr64 \n" \
" subq $8,%rsp \n" \
" .previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" addq $8,%rsp \n" \
" ret \n" \
" .previous")
#define MD_CRT0_START \
__asm( \
".text \n" \
" .align 8 \n" \
" .globl __start \n" \
" .globl _start \n" \
"_start: \n" \
"__start: \n" \
" endbr64 \n" \
" movq %rdx,%rcx \n" \
" movq (%rsp),%rdi \n" \
" leaq 16(%rsp,%rdi,8),%rdx \n" \
" leaq 8(%rsp),%rsi \n" \
" subq $8,%rsp \n" \
" andq $~15,%rsp \n" \
" addq $8,%rsp \n" \
" jmp ___start \n" \
" .previous")
/* zig patch: no static crt support */

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lib/libc/openbsd/lib/csu/arm/md_init.h vendored Normal file
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/* $OpenBSD: md_init.h,v 1.19 2024/08/17 09:48:31 phessler Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* arm overrides these because it uses %progbits instead of @progbits
*/
#define MD_DATA_SECTION_FLAGS_SYMBOL(section, flags, type, symbol) \
extern __dso_hidden type symbol[]; \
__asm(" .section "section",\""flags"\",%progbits \n" \
" .balign 4 \n" \
#symbol": \n" \
" .previous")
#define MD_DATA_SECTION_SYMBOL_VALUE(section, type, symbol, value) \
extern __dso_hidden type symbol[]; \
__asm(" .section "section",\"aw\",%progbits \n" \
" .balign 4 \n" \
#symbol": \n" \
" .int "#value" \n" \
" .previous")
#define MD_DATA_SECTION_FLAGS_VALUE(section, flags, value) \
__asm(" .section "section",\""flags"\",%progbits \n" \
" .balign 4 \n" \
" .int "#value" \n" \
" .previous")
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\" \n" \
" movw r0, #:lower16:" #func "- 1f - 8 \n" \
" movt r0, #:upper16:" #func "- 1f - 8 \n" \
"1: add r0, r0, pc \n" \
" blx r0 \n" \
" .previous")
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",%progbits \n" \
" .globl " #entry_pt " \n" \
" .type " #entry_pt ",%function \n" \
" .align 4 \n" \
#entry_pt": \n" \
" push {r4, lr} \n" \
" /* fall thru */ \n" \
" .previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",%progbits \n" \
" pop {r4, pc} \n" \
" .previous")
/*
* The definitions of environ and __progname prevent the creation
* of COPY relocations for WEAK symbols.
*/
#define MD_CRT0_START \
__asm( \
".text \n" \
" .align 0 \n" \
" .globl _start \n" \
" .globl __start \n" \
"_start: \n" \
"__start: \n" \
" mov r3, r0 /* cleanup */ \n" \
"/* Get argc/argv/envp from stack */ \n" \
" ldr r0, [sp, #0] \n" \
" add r1, sp, #4 \n" \
" add r2, r1, r0, lsl #2 \n" \
" add r2, r2, #4 \n" \
" \n" \
"/* \n" \
" * Ensure the stack is properly \n" \
" * aligned before calling C code. \n" \
" */ \n" \
" bic sp, sp, #7" /*__STRING(STACKALIGNBYTES)*/ " \n" \
" b ___start \n" \
".previous");
/* zig patch: no static crt support */

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lib/libc/openbsd/lib/csu/crt0.c vendored Normal file
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/* $OpenBSD: crt0.c,v 1.19 2025/05/24 06:32:12 deraadt Exp $ */
/*
* Copyright (c) 1995 Christopher G. Demetriou
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Christopher G. Demetriou
* for the NetBSD Project.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* 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.
*/
#include <sys/syscall.h>
#include <stdlib.h>
#include <limits.h>
#include "md_init.h"
/* zig patch: no static crt support */
#include "extern.h"
#define STR(x) __STRING(x) /* shorter macro name for MD_RCRT0_START */
/* some defaults */
#ifndef MD_START_ARGS
#define MD_START_ARGS \
int argc, char **argv, char **envp, void (*cleanup)(void)
#endif
static void ___start(MD_START_ARGS) __used;
#ifndef MD_EPROL_LABEL
#define MD_EPROL_LABEL __asm(" .text\n_eprol:")
#endif
char ***_csu_finish(char **_argv, char **_envp, void (*_cleanup)(void));
/* zig patch: no profiling support */
#ifdef MD_CRT0_START
MD_CRT0_START;
#endif
/* zig patch: no legacy leanup abi support */
static void
___start(MD_START_ARGS)
{
size_t size, i;
char ***environp;
#ifdef MD_START_SETUP
MD_START_SETUP
#endif
environp = _csu_finish(argv, envp, cleanup);
exit(main(argc, argv, *environp));
}

61
lib/libc/openbsd/lib/csu/crtbegin.c vendored Normal file
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/* $OpenBSD: crtbegin.c,v 1.26 2019/01/09 16:42:38 visa Exp $ */
/* $NetBSD: crtbegin.c,v 1.1 1996/09/12 16:59:03 cgd Exp $ */
/*
* Copyright (c) 1993 Paul Kranenburg
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by Paul Kranenburg.
* 4. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission
*
* 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.
*/
/*
* Run-time module for GNU C++ compiled shared libraries.
*
* The linker constructs the following arrays of pointers to global
* constructors and destructors. The first element contains the
* number of pointers in each.
* The tables are also null-terminated.
*/
#include <stdlib.h>
#include "md_init.h"
#include "os-note-elf.h"
#include "extern.h"
/* zig patch: no ctors/dtors and init/fini */
/*
* Include support for the __cxa_atexit/__cxa_finalize C++ abi for
* gcc > 2.x. __dso_handle is NULL in the main program and a unique
* value for each C++ shared library. For more info on this API, see:
*
* http://www.codesourcery.com/cxx-abi/abi.html#dso-dtor
*/
void *__dso_handle = NULL;
__asm(".hidden __dso_handle");
long __guard_local __dso_hidden __attribute__((section(".openbsd.randomdata")));

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lib/libc/openbsd/lib/csu/extern.h vendored Normal file
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/*
* Copyright (c) 2004 Marc Espie <espie@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
void __init(void) __dso_hidden;
int main(int argc, char *argv[], char *envp[]);
typedef const void *dl_cb_cb(int);
typedef void (*initarray_f)(int, char **, char **, dl_cb_cb *);
typedef void (*init_f)(void);
/*
* Provide default implementations of these. Only archs with weird
* ASM stuff (hppa, arm) need to override them
*/
#ifndef MD_DATA_SECTION_FLAGS_SYMBOL
# ifdef __LP64__
# define VALUE_ALIGN ".balign 8"
# define VALUE_DIRECTIVE ".quad"
# else
# define VALUE_ALIGN ".balign 4"
# define VALUE_DIRECTIVE ".int"
# endif
# define MD_DATA_SECTION_FLAGS_SYMBOL(section, flags, type, symbol) \
extern __dso_hidden type symbol[]; \
__asm(" .section "section",\""flags"\",@progbits \n" \
" "VALUE_ALIGN" \n" \
#symbol": \n" \
" .previous")
# define MD_DATA_SECTION_SYMBOL_VALUE(section, type, symbol, value) \
extern __dso_hidden type symbol[]; \
__asm(" .section "section",\"aw\",@progbits \n" \
" "VALUE_ALIGN" \n" \
#symbol": \n" \
" "VALUE_DIRECTIVE" "#value" \n" \
" .previous")
# define MD_DATA_SECTION_FLAGS_VALUE(section, flags, value) \
__asm(" .section "section",\""flags"\",@progbits \n" \
" "VALUE_ALIGN" \n" \
" "VALUE_DIRECTIVE" "#value" \n" \
" .previous")
#endif

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lib/libc/openbsd/lib/csu/i386/md_init.h vendored Normal file
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/* $OpenBSD: md_init.h,v 1.13 2023/11/18 16:26:16 deraadt Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\"\n" \
" call " #func "\n" \
" .previous")
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" .globl " #entry_pt " \n" \
" .type " #entry_pt ",@function \n" \
" .align 16 \n" \
#entry_pt": \n" \
" pushl %ebp \n" \
" movl %esp,%ebp \n" \
" andl $~15,%esp \n" \
" .previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" leave \n" \
" ret \n" \
" .previous")
#define MD_CRT0_START \
__asm( \
".text \n" \
" .align 4 \n" \
" .globl __start \n" \
" .globl _start \n" \
"_start: \n" \
"__start: \n" \
" movl %esp,%ebp \n" \
" andl $~15,%esp # align stack\n" \
" pushl %edx # cleanup\n" \
" movl 0(%ebp),%eax \n" \
" leal 8(%ebp,%eax,4),%ecx \n" \
" leal 4(%ebp),%edx \n" \
" pushl %ecx \n" \
" pushl %edx \n" \
" pushl %eax \n" \
" xorl %ebp,%ebp # mark deepest stack frame\n" \
" call ___start \n" \
" .previous")
/* zig patch: no static crt support */

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/* $OpenBSD: md_init.h,v 1.22 2023/11/19 00:46:54 deraadt Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
* Copyright (c) 2001 Simon Burge
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
/*
* Allocate 32 bytes for the stack frame. Store GP at SP+16 (since
* this is where code generated by the compiler for fallthru processing
* expects it to be), and the RA at SP+24.
*/
/* this is gross... */
#ifdef __ABICALLS__
#define MD_FUNCTION_PROLOGUE(entry_pt) \
" .frame $sp,32,$31 \n" \
" .set reorder \n" \
" dsubu $sp,$sp,32 \n" \
" .cpsetup $25, 16, "#entry_pt" \n" \
" sd $ra ,24($sp) \n"
#else
#define MD_FUNCTION_PROLOGUE(entry_pt) \
" dsubu $sp,$sp,32 \n" \
" sd $ra ,24($sp) \n"
#endif
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
".align 2 \n" \
".globl "#entry_pt" \n" \
".type "#entry_pt",@function \n" \
".ent "#entry_pt" \n" \
#entry_pt": \n" \
MD_FUNCTION_PROLOGUE(entry_pt) \
" /* fall thru */ \n" \
".end "#entry_pt" \n" \
".previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" ld $ra ,24($sp) \n" \
" # next should have been a .cpreturn \n" \
" ld $gp,16($sp) \n" \
" .set noreorder \n" \
" j $ra \n" \
" daddu $sp,$sp,32 \n" \
" .set reorder \n" \
".previous")
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\" \n" \
" .local " #func " \n" \
" jal " #func " \n" \
".previous")
#define MD_CRT0_START \
__asm( \
".text \n" \
" .align 3 \n" \
" .globl __start \n" \
" .ent __start \n" \
" .type __start, @function \n" \
"__start: \n" \
" lui $gp, %hi(%neg(%gp_rel(__start))) \n" \
" addiu $gp, $gp, %lo(%neg(%gp_rel(__start))) \n" \
" daddu $gp, $gp, $t9 \n" \
" move $a0, $sp \n" \
" dsrl $a1, $sp, 4 \n" /* align stack on a */ \
" dsll $sp, $a1, 4 \n" /* 16 byte boundary */ \
" move $a1, $v0 \n" \
" .local ___start \n" \
" dla $t9, ___start \n" \
" jr $t9 \n" \
" .end __start \n" \
" .previous")
/* zig patch: no static crt support */
struct kframe {
long kargc;
char *kargv[1]; /* size depends on kargc */
char kargstr[1]; /* size varies */
char kenvstr[1]; /* size varies */
};
#define MD_START_ARGS struct kframe *kfp, void (*cleanup)(void)
#define MD_START_SETUP \
char **argv, **envp; \
long argc; \
\
argc = kfp->kargc; \
argv = &kfp->kargv[0]; \
envp = argv + argc + 1;

19
lib/libc/openbsd/lib/csu/os-note-elf.h vendored Normal file
View file

@ -0,0 +1,19 @@
/* $OpenBSD: os-note-elf.h,v 1.5 2009/03/06 23:13:40 kurt Exp $ */
/*
* Contents:
*
* long Name length
* long Description length
* long ELF_NOTE_TYPE_OSVERSION (1) XXX - need a define.
* "OpenBSD\0"
* version? 0 XXX
*/
__asm(" .section \".note.openbsd.ident\", \"a\"\n"
" .p2align 2\n"
" .long 8\n"
" .long 4\n"
" .long 1\n"
" .ascii \"OpenBSD\\0\"\n"
" .long 0\n"
" .previous\n");

View file

@ -0,0 +1,80 @@
/* $OpenBSD: md_init.h,v 1.12 2023/11/18 16:26:16 deraadt Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\"\n" \
" bl " #func "\n" \
" .previous")
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" .globl " #entry_pt " \n" \
" .type " #entry_pt ",@function \n" \
" .align 4 \n" \
#entry_pt": \n" \
" stwu %r1,-16(%r1) \n" \
" mflr %r0 \n" \
" stw %r0,12(%r1) \n" \
" /* fall thru */ \n" \
" .previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" lwz %r0,12(%r1) \n" \
" mtlr %r0 \n" \
" addi %r1,%r1,16 \n" \
" blr \n" \
" .previous")
#define MD_CRT0_START \
__asm( \
" .text \n" \
" .section \".text\" \n" \
" .align 2 \n" \
" .globl _start \n" \
" .type _start, @function \n" \
" .globl __start \n" \
" .type __start, @function \n" \
"_start: \n" \
"__start: \n" \
" # put cleanup in r6 instead of r7 \n" \
" mr %r6, %r7 \n" \
" b ___start \n" \
)
/* zig patch: no static crt support */

View file

@ -0,0 +1,75 @@
/* $OpenBSD: md_init.h,v 1.5 2023/11/18 16:26:16 deraadt Exp $ */
/*
* Copyright (c) 2020 Dale Rahn <drahn@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\" \n" \
" bl " #func " \n" \
" .previous")
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" .globl " #entry_pt " \n" \
" .type " #entry_pt ",@function \n" \
" .align 4 \n" \
#entry_pt": \n" \
".L_"sect"_gep: \n" \
" addis %r2, %r12, .TOC.-.L_"sect"_gep@ha \n" \
" addi %r2, %r2, .TOC.-.L_"sect"_gep@l \n" \
".L_"sect"_lep: \n" \
" .localentry " #entry_pt", .L_"sect"_lep-.L_"sect"_gep; \n" \
" mflr %r0 \n" \
" std %r0,16(%r1) \n" \
" stdu %r1,-64(%r1) \n" \
" /* fall thru */ \n" \
" .previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" addi %r1,%r1,64 \n" \
" ld %r0,16(%r1) \n" \
" mtlr %r0 \n" \
" blr \n" \
" .previous")
#define MD_CRT0_START \
__asm( \
" .text \n" \
" .section \".text\" \n" \
" .align 2 \n" \
" .globl _start \n" \
" .type _start, @function \n" \
" .globl __start \n" \
" .type __start, @function \n" \
"_start: \n" \
"__start: \n" \
" bl 1f \n" \
"1: \n" \
" mflr %r30 \n" \
" addis %r2, %r30, .TOC.-1b@ha \n" \
" addi %r2, %r2, .TOC.-1b@l \n" \
" # put cleanup in r6 instead of r7 \n" \
" mr %r6, %r7 \n" \
" li %r7, 0 \n" \
" stdu %r7, -64(%r1) \n" \
" b ___start \n" \
)
/* zig patch: no static crt support */

View file

@ -0,0 +1,74 @@
/* $OpenBSD: md_init.h,v 1.4 2023/11/18 16:26:16 deraadt Exp $ */
/*
* Copyright (c) 2020 Dale Rahn <drahn@openbsd.org>
*
* Permission to use, copy, modify, and distribute this software for any
* purpose with or without fee is hereby granted, provided that the above
* copyright notice and this permission notice appear in all copies.
*
* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
* WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
* MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
* ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
* ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
* OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\" \n" \
"call " # func "@plt \n" \
" .previous")
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",%progbits \n" \
" .globl " #entry_pt " \n" \
" .type " #entry_pt ",@function \n" \
" .align 4 \n" \
#entry_pt": \n" \
" addi sp, sp, -16 \n" \
" sd ra,8(sp) \n" \
" sd s0,0(sp) \n" \
" addi s0, sp, 16 \n" \
" /* fall thru */ \n" \
" .previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",%progbits \n" \
" ld ra, 8(sp) \n" \
" ld s0, 0(sp) \n" \
" addi sp, sp, 16 \n" \
" jr ra \n" \
" .previous")
#define MD_CRT0_START \
__asm( \
".text \n" \
" .align 0 \n" \
" .globl _start \n" \
" .globl __start \n" \
" .type _start, @function \n" \
" .type __start, @function \n" \
"_start: \n" \
"__start: \n" \
"/* Get argc/argv/envp from stack */ \n" \
" ld a0, (sp) \n" \
" addi a1, sp, 0x8 \n" \
" slli t0, a0, 0x3 \n" \
" add a2, a1, t0 \n" \
" addi a2, a2, 0x8 \n" \
" \n" \
" addi sp, sp, -16 \n" \
" li t0, 0 \n" \
" sd t0,(sp) \n" \
" \n" \
" j ___start \n" \
" .size _start, .-_start \n" \
" .size __start, .-__start \n" \
".previous");
/* zig patch: no static crt support */

View file

@ -0,0 +1,85 @@
/* $OpenBSD: md_init.h,v 1.11 2025/01/30 21:41:37 kurt Exp $ */
/*-
* Copyright (c) 2001 Ross Harvey
* 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.
* 3. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the NetBSD
* Foundation, Inc. and its contributors.
* 4. Neither the name of The NetBSD Foundation 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 NETBSD FOUNDATION, INC. 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 FOUNDATION 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.
*/
#define MD_SECT_CALL_FUNC(section, func) \
__asm (".section "#section", \"ax\" \n" \
" call " #func " \n" \
" nop \n" \
" .previous")
#define MD_SECTION_PROLOGUE(sect, entry_pt) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" .globl " #entry_pt " \n" \
" .type " #entry_pt ",@function \n" \
#entry_pt": \n" \
" save %sp, -192, %sp \n" \
" .align 4 \n" \
" /* fall thru */ \n" \
" .previous")
#define MD_SECTION_EPILOGUE(sect) \
__asm ( \
".section "#sect",\"ax\",@progbits \n" \
" ret \n" \
" restore \n" \
" .previous")
#define MD_CRT0_START \
__asm__( \
".text \n" \
" .align 4 \n" \
" .global _start \n" \
" .global __start \n" \
"_start: \n" \
"__start: \n" \
" clr %fp \n" \
" add %sp, 2175, %o0 /* stack */\n" \
" ba,pt %icc, ___start \n" \
" mov %g1, %o1 \n" \
" .previous")
/* zig patch: no static crt support */
#define MD_START_ARGS char **sp, void (*cleanup)(void)
#define MD_START_SETUP \
char **argv, **envp; \
long argc; \
\
argc = *(long *)sp; \
argv = sp + 1; \
envp = sp + 2 + argc; /* 2: argc + NULL ending argv */