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/* $OpenBSD: md_init.h,v 1.2 2013/12/03 06:21:41 guenther Exp $ */
/*
* Copyright (c) 2008 Miodrag Vallat.
*
* 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 ( \
"\t.section\t" #section ",\"ax\",@progbits\n" \
"\tcalls\t$0," #func "\n" \
"\t.previous")
#define MD_SECTION_PROLOGUE(section, entry) __asm ( \
"\t.section\t" #section ",\"ax\",@progbits\n" \
"\t.globl\t" #entry "\n" \
"\t.type\t" #entry ",@function\n" \
"\t.align\t1\n" \
#entry ":\n" \
"\t.word 0x0000\n" /* entry mask */ \
"\t.previous")
#define MD_SECTION_EPILOGUE(section) __asm( \
"\t.section\t" #section ",\"ax\",@progbits\n" \
"\tret\n" \
"\t.previous")
/*
* _start has no registers to save before calling the real start.
* _start has two nops, just in case (c.f. m88k?).
*/
#define MD_CRT0_START \
__asm( \
".text \n" \
" .align 2 \n" \
" .globl _start \n" \
" .type _start,@function \n" \
"_start: \n" \
" .word 0x0101 \n" \
" pushl %sp \n" \
" calls $1,___start \n" \
" halt \n" \
" .previous")
struct kframe {
int kargc;
char *kargv[1]; /* size depends on kargc */
char kargstr[1]; /* size varies */
char kenvstr[1]; /* size varies */
};
/* no cleanup() callback passed to ___start, because no ld.so */
#define MD_NO_CLEANUP
#define MD_START_ARGS struct kframe *kfp
#define MD_START_SETUP \
char **argv, **envp; \
int argc; \
\
argc = kfp->kargc; \
argv = &kfp->kargv[0]; \
environ = envp = argv + argc + 1;
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