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Diffstat (limited to 'lib/csu/powerpc/crt0.c')
| -rw-r--r-- | lib/csu/powerpc/crt0.c | 181 |
1 files changed, 0 insertions, 181 deletions
diff --git a/lib/csu/powerpc/crt0.c b/lib/csu/powerpc/crt0.c deleted file mode 100644 index a1fcde53b89..00000000000 --- a/lib/csu/powerpc/crt0.c +++ /dev/null @@ -1,181 +0,0 @@ -/* $OpenBSD: crt0.c,v 1.8 2013/12/01 17:18:31 guenther Exp $ */ -/* $NetBSD: crt0.c,v 1.1 1996/09/12 16:59:02 cgd 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/param.h> -#include <stdlib.h> -#include <sys/syscall.h> - -char **environ; -char * __progname = ""; - -char __progname_storage[NAME_MAX+1]; - -#ifdef MCRT0 -extern void monstartup(u_long, u_long); -extern void _mcleanup(void); -extern unsigned char _etext, _eprol; -#endif /* MCRT0 */ - -static inline char * _strrchr(const char *p, char ch); - -#define STR(x) __STRING(x) -__asm( -" .text \n" -" .section \".text\" \n" -" .align 2 \n" -" .size __got_start, 0 \n" -" .type __got_start, @object \n" -" .size __got_end, 0 \n" -" .type __got_end, @object \n" -" .weak __got_start \n" -" .weak __got_end \n" -" .globl _start \n" -" .type _start, @function \n" -" .globl __start \n" -" .type __start, @function \n" -"_start: \n" -"__start: \n" -" # move argument registers to saved registers for startup flush \n" -" mr %r26, %r3 \n" -" mr %r25, %r4 \n" -" mr %r24, %r5 \n" -" mr %r23, %r6 \n" -" mr %r22, %r7 \n" -" mflr %r27 /* save off old link register */ \n" -" bl 1f \n" -" # this instruction never gets executed but can be used \n" -" # to find the virtual address where the page is loaded. \n" -" bl _GLOBAL_OFFSET_TABLE_@local-4 \n" -"1: \n" -" mflr %r6 # this stores where we are (+4) \n" -" lwz %r18, 0(%r6) # load the instruction at offset_sym \n" -" # it contains an offset to the location \n" -" # of the GOT. \n" -" \n" -" rlwinm %r18,%r18,0,8,30 # mask off the offset portion of the instr. \n" -" \n" -" /* \n" -" * these adds effectively calculate the value the \n" -" * bl _GLOBAL_OFFSET_TABLE_@local-4 \n" -" * operation that would be below would calculate. \n" -" */ \n" -" add %r28, %r18, %r6 \n" -" \n" -" addi %r3,%r28,4 # calculate the actual got addr \n" -" lwz %r0,__got_start@got(%r3) \n" -" cmpwi %r0,0 \n" -" beq 4f \n" -" cmpw %r0,%r28 \n" -" bne 4f \n" -" lwz %r4,__got_end@got(%r3) \n" -" cmpwi %r4,0 \n" -" beq 2f \n" -" \n" -" sub %r4, %r4, %r0 \n" -" b 3f \n" -"2: \n" -" li %r4, 4 \n" -"3: \n" -" \n" -" /* mprotect GOT to eliminate W+X regions in static binaries */ \n" -" li %r0, " STR(SYS_mprotect) " \n" -" mr %r3, %r28 \n" -" li %r5, 5 /* (PROT_READ|PROT_EXEC) */ \n" -" sc \n" -" \n" -"4: \n" -" li %r0, 0 \n" -" # flush the blrl instruction out of the data cache \n" -" dcbf %r6, %r18 \n" -" sync \n" -" isync \n" -" # make certain that the got table addr is not in the icache \n" -" icbi %r6, %r18 \n" -" sync \n" -" isync \n" -" mtlr %r27 \n" -" # move argument registers back from saved registers \n" -" mr %r3, %r26 \n" -" mr %r4, %r25 \n" -" mr %r5, %r24 \n" -" mr %r6, %r23 \n" -" mr %r7, %r22 \n" -" b ___start \n" -); - -void -___start(int argc, char **argv, char **envp, void *aux, void (*cleanup)(void)) -{ - char *s; - - environ = envp; - - if ((__progname = argv[0]) != NULL) { /* NULL ptr if argc = 0 */ - if ((__progname = _strrchr(__progname, '/')) == NULL) - __progname = argv[0]; - else - __progname++; - for (s = __progname_storage; *__progname && - s < &__progname_storage[sizeof __progname_storage - 1]; ) - *s++ = *__progname++; - *s = '\0'; - __progname = __progname_storage; - } - - if (cleanup) - atexit(cleanup); - -#ifdef MCRT0 - atexit(_mcleanup); - monstartup((u_long)&_eprol, (u_long)&_etext); -#endif - - __init(); - - exit(main(argc, argv, environ)); -} - -static inline char * -_strrchr(const char *p, char ch) -{ - char *save; - - for (save = NULL;; ++p) { - if (*p == ch) - save = (char *)p; - if (!*p) - return(save); - } -/* NOTREACHED */ -} -asm (" .section \".text\" \n_eprol:"); - |