#undef STARTFILE_SPEC
#define STARTFILE_SPEC \
"%{!shared: \
- %{pg:gcrt1.o%s} %{!pg:%{p:gcrt1.o%s} \
- %{!p:%{profile:gcrt1.o%s} \
- %{!profile:crt1.o%s}}}} \
- crti.o%s %{!shared:crtbegin.o%s} %{shared:crtbeginS.o%s}"
+ %{pg:gcrt1.o%s} \
+ %{!pg: \
+ %{p:gcrt1.o%s} \
+ %{!p: \
+ %{profile: gcrt1.o%s} \
+ %{!profile: \
+ %{pie: Scrt1.o%s;:crt1.o%s}}}}} \
+ crti.o%s \
+ %{shared|pie:crtbeginS.o%s;:crtbegin.o%s}"
#undef ENDFILE_SPEC
#define ENDFILE_SPEC \
- "%{!shared:crtend.o%s} %{shared:crtendS.o%s} crtn.o%s"
+ "%{shared|pie:crtendS.o%s;:crtend.o%s} crtn.o%s"
#undef LIB_SPEC
#define LIB_SPEC \
# $FreeBSD: src/lib/csu/i386-elf/Makefile,v 1.6.2.5 2002/11/23 17:44:29 ru Exp $
-SRCS+= crt1.c crti.S crtn.S
-OBJS+= gcrt1.o
-INSTALLOBJS+= crt1.o crti.o crtn.o gcrt1.o
-CLEANFILES+= crt1.o crti.o crtn.o gcrt1.o
+SRCS+= crti.S crtn.S
+OBJS+= gcrt1.o crt1.o Scrt1.o
+INSTALLOBJS+= crt1.o crti.o crtn.o gcrt1.o Scrt1.o
+CLEANFILES+= crt1.o crti.o crtn.o gcrt1.o Scrt1.o \
+ crt1_c.o crt1_s.o gcrtl_c.o Scrt1_c.o
WARNS?= 2
-CFLAGS+= -elf -fkeep-inline-functions \
- -I${CSUDIR}/../common
-LDFLAGS+= -elf
+CFLAGS+= -I${CSUDIR}/../common
.PATH: ${CSUDIR} ${CSUDIR}/../common
-gcrt1.o: crt1.c
- ${CC} ${CFLAGS} -DGCRT -c -o gcrt1.o ${CSUDIR}/crt1.c
+gcrt1_c.o: crt1_c.c
+ ${CC} ${CFLAGS} -DGCRT -c -o gcrt1_c.o ${CSUDIR}/crt1_c.c
+
+gcrt1.o: gcrt1_c.o crt1_s.o
+ ${LD} ${LDFLAGS} -o gcrt1.o -r crt1_s.o gcrt1_c.o
+
+crt1.o: crt1_c.o crt1_s.o
+ ${LD} ${LDFLAGS} -o crt1.o -r crt1_s.o crt1_c.o
+ objcopy --localize-symbol _start1 crt1.o
+
+Scrt1_c.o: crt1_c.c
+ ${CC} ${CFLAGS} -DGCRT -fPIC -DPIC -c -o Scrt1_c.o ${CSUDIR}/crt1_c.c
+
+Scrt1.o: Scrt1_c.o crt1_s.o
+ ${LD} ${LDFLAGS} -o Scrt1.o -r crt1_s.o Scrt1_c.o
+ objcopy --localize-symbol _start1 Scrt1.o
* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*
- * $FreeBSD: src/lib/csu/i386-elf/crt1.c,v 1.4.2.2 2002/11/18 04:57:13 bde Exp $
- * $DragonFly: src/lib/csu/i386/crt1.c,v 1.3 2005/05/11 19:46:51 dillon Exp $
+ * $FreeBSD: src/lib/csu/i386-elf/crt1.c, svn 200038 2009/12/02 kib $
*/
#ifndef __GNUC__
extern int _DYNAMIC;
#pragma weak _DYNAMIC
-#ifdef __i386__
-#define get_rtld_cleanup() \
- ({ fptr __value; \
- __asm__("movl %%edx,%0" : "=rm"(__value)); \
- __value; })
-#else
-#error "This file only supports the i386 architecture"
-#endif
-
char **environ;
char *__progname = "";
+void _start1(fptr, int, char *[]) __dead2;
void
-_start(char *arguments, ...)
+_start1(fptr cleanup, int argc, char *argv[])
{
- fptr rtld_cleanup;
- int argc;
- char **argv;
char **env;
- rtld_cleanup = get_rtld_cleanup();
- argv = &arguments;
- argc = * (int *) (argv - 1);
env = argv + argc + 1;
environ = env;
if(argc > 0 && argv[0] != NULL) {
* Setup the initial TLS space. The RTLD does not set up our TLS
* (it can't, it doesn't know how our errno is declared). It simply
* does all the groundwork required so that we can call
- * _rtld_allocate_tls().
+ * _rtld_allocate_tls().
*/
_init_tls();
_rtld_call_init();
if(&_DYNAMIC != NULL)
- atexit(rtld_cleanup);
+ atexit(cleanup);
#ifdef GCRT
atexit(_mcleanup);
atexit(_fini);
#ifdef GCRT
monstartup(&eprol, &etext);
+__asm__("eprol:");
#endif
_init();
-#ifndef __GNUC__
exit( main(argc, argv, env) );
-#else
- /*
- * Some versions of gcc-2 expect the stack frame to be aligned as
- * follows after it is set up in main():
- *
- * +--------------+ <--- aligned by PREFERRED_STACK_BOUNDARY
- * +%ebp (if any) +
- * +--------------+
- * |return address|
- * +--------------+
- * | arguments |
- * | : |
- * | : |
- * +--------------+
- *
- * We implement the above to fix just the usual case in FreeBSD-4.
- * Alignment for main() is too compiler-dependent to handle correctly
- * in all cases here (or in the kernel). E.g., a different alignment
- * is required for at least gcc-2.95.4 even for the small variation
- * of compiling main() with -fomit-frame-pointer.
- */
- __asm__("\n"
- "andl $~0xf, %%esp # align stack to 16-byte boundary\n"
- "subl $12+12, %%esp # space for args and padding\n"
- "movl %0, 0(%%esp)\n"
- "movl %1, 4(%%esp)\n"
- "movl %2, 8(%%esp)\n"
- "call main\n"
- "movl %%eax, 0(%%esp)\n"
- "call exit\n"
- : : "r" (argc), "r" (argv), "r" (env) : "ax", "cx", "dx", "memory");
-#endif
}
-#ifdef GCRT
-__asm__(".text");
-__asm__("eprol:");
-__asm__(".previous");
-#endif
+__asm(".hidden _start1");
--- /dev/null
+/*-
+ * Copyright 2009 Konstantin Belousov.
+ * 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.
+ *
+ * $FreeBSD: src/lib/csi/i386-elf/crt1_s.S, svn 217383 2011/01/19 kib $
+ */
+
+ .text
+ .align 4
+ .globl _start
+ .type _start, @function
+_start:
+ .cfi_startproc
+ xorl %ebp,%ebp
+ pushl %ebp
+ .cfi_def_cfa_offset 4
+ movl %esp,%ebp
+ .cfi_offset %ebp,-8
+ .cfi_def_cfa_register %ebp
+ andl $0xfffffff0,%esp # align stack
+ leal 8(%ebp),%eax
+ subl $4,%esp
+ pushl %eax # argv
+ pushl 4(%ebp) # argc
+ pushl %edx # rtld cleanup
+ call _start1
+ int3
+ .cfi_endproc
+ .size _start, . - _start
# $FreeBSD: src/lib/csu/amd64/Makefile,v 1.18 2003/06/30 12:53:39 ru Exp $
SRCS+= crt1.c crti.S crtn.S
-OBJS+= gcrt1.o
+OBJS+= Scrt1.o gcrt1.o
INSTALLOBJS+= crt1.o crti.o crtn.o gcrt1.o
CLEANFILES+= crt1.o crti.o crtn.o gcrt1.o
WARNS?= 2
CFLAGS+= -I${CSUDIR}/../common \
-I${CSUDIR}/../../libc/include
+CFLAGS+= -fno-omit-frame-pointer
.PATH: ${CSUDIR} ${CSUDIR}/../common
gcrt1.o: crt1.c
${CC} ${CFLAGS} -DGCRT -c -o gcrt1.o ${CSUDIR}/crt1.c
+
+Scrt1.o: crt1.c
+ ${CC} ${CFLAGS} -fPIC -DPIC -c -o Scrt1.o ${CSUDIR}/crt1.c
projects / dragonfly.git / commitdiff