diff options
Diffstat (limited to 'sysdeps/unix/sparc')
| -rw-r--r-- | sysdeps/unix/sparc/start.c | 186 |
1 files changed, 0 insertions, 186 deletions
diff --git a/sysdeps/unix/sparc/start.c b/sysdeps/unix/sparc/start.c deleted file mode 100644 index 86fb8bb0a5..0000000000 --- a/sysdeps/unix/sparc/start.c +++ /dev/null @@ -1,186 +0,0 @@ -/* Copyright (C) 1991-1997,2004,2012 Free Software Foundation, Inc. - This file is part of the GNU C Library. - - The GNU C Library is free software; you can redistribute it and/or - modify it under the terms of the GNU Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - In addition to the permissions in the GNU Lesser General Public - License, the Free Software Foundation gives you unlimited - permission to link the compiled version of this file with other - programs, and to distribute those programs without any restriction - coming from the use of this file. (The GNU Lesser General Public - License restrictions do apply in other respects; for example, they - cover modification of the file, and distribution when not linked - into another program.) - - Note that people who make modified versions of this file are not - obligated to grant this special exception for their modified - versions; it is their choice whether to do so. The GNU Lesser - General Public License gives permission to release a modified - version without this exception; this exception also makes it - possible to release a modified version which carries forward this - exception. - - The GNU C Library is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, see - <http://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <stdlib.h> -#include <unistd.h> -#include <fcntl.h> - -#ifndef NO_SHLIB -#include <sys/exec.h> -#include <sys/types.h> -#include <sys/mman.h> -#include <link.h> -#include <syscall.h> -#endif - -#if !defined (__GNUC__) || __GNUC__ < 2 - #error This file uses GNU C extensions; you must compile with GCC version 2. -#endif - -/* The first piece of initialized data. */ -int __data_start = 0; -weak_alias (__data_start, data_start) - -extern void __libc_init (int argc, char **argv, char **envp) __THROW; -extern int main (int argc, char **argv, char **envp) __THROW; - -register long int sp asm("%sp"), fp asm("%fp"); - -#ifndef NO_SHLIB -static void init_shlib (void) __THROW; -#endif - -#ifndef NO_EXPLICIT_START -/* Declare _start with an explicit assembly symbol name of `start' - (note no leading underscore). This is the name Sun's crt0.o uses, - and programs are often linked with `ld -e start'. */ -void _start (void) asm ("start"); -#endif - -void -_start (void) -{ - /* It is important that these be declared `register'. - Otherwise, when compiled without optimization, they are put on the - stack, which loses completely after we zero the FP. */ - register int argc; - register char **argv, **envp; - - /* Unwind the frame built when we entered the function. */ - asm("restore"); - - /* And clear the frame pointer. */ - fp = 0; - - /* The argument info starts after one register - window (64 bytes) past the SP. */ - argc = ((int *) sp)[16]; - argv = (char **) &((int *) sp)[17]; - envp = &argv[argc + 1]; - __environ = envp; - -#ifndef NO_SHLIB - init_shlib (); -#endif - - /* Allocate 24 bytes of stack space for the register save area. */ - sp -= 24; - __libc_init (argc, argv, envp); - - exit (main (argc, argv, envp)); -} - -#ifndef NO_SHLIB - -/* System calls for use by the bootstrap routine. - These are defined here since the usual calls may be dynamically linked. */ - -int syscall (int sysno, ...) asm ("init_syscall"); -asm ("init_syscall:\n" - " clr %g1\n" - " ta 0\n" - " bcc 1f\n" - " sethi %hi(_errno), %g1\n" - " st %o0, [%g1 + %lo(_errno)]\n" - " sub %g0, 1, %o0\n" - "1:retl\n" - " nop"); - -static void -init_shlib () -{ - extern struct link_dynamic _DYNAMIC; - int so, zf; - caddr_t somap; - caddr_t sodmap; - caddr_t sobssmap; - void (*ldstart) (int, int); - struct exec soexec; - struct - { - caddr_t crt_ba; - int crt_dzfd; - int crt_ldfd; - struct link_dynamic *crt_dp; - char **crt_ep; - caddr_t crt_bp; - } soarg; - - /* If not dynamically linked, do nothing. */ - if (&_DYNAMIC == 0) - return; - - /* Map in the dynamic linker. */ - so = syscall (SYS_open, "/usr/lib/ld.so", O_RDONLY); - if (syscall (SYS_read, so, &soexec, sizeof (soexec)) != sizeof (soexec) - || soexec.a_magic != ZMAGIC) - { - static const char emsg[] = "crt0: no /usr/lib/ld.so\n"; - - syscall (SYS_write, 2, emsg, sizeof (emsg) - 1); - syscall (SYS_exit, 127); - } - somap = (caddr_t) syscall (SYS_mmap, 0, - soexec.a_text + soexec.a_data + soexec.a_bss, - PROT_READ | PROT_EXEC, _MAP_NEW | MAP_PRIVATE, - so, 0); - sodmap = (caddr_t) syscall (SYS_mmap, somap + soexec.a_text, soexec.a_data, - PROT_READ | PROT_WRITE | PROT_EXEC, - _MAP_NEW | MAP_FIXED | MAP_PRIVATE, - so, soexec.a_text); - zf = syscall (SYS_open, "/dev/zero", O_RDONLY); - if (soexec.a_bss != 0) - sobssmap = (caddr_t) syscall (SYS_mmap, - somap + soexec.a_text + soexec.a_data, - soexec.a_bss, - PROT_READ | PROT_WRITE | PROT_EXEC, - _MAP_NEW | MAP_FIXED | MAP_PRIVATE, - zf, 0); - - /* Call the entry point of the dynamic linker. */ - soarg.crt_ba = somap; - soarg.crt_dzfd = zf; - soarg.crt_ldfd = so; - soarg.crt_dp = &_DYNAMIC; - soarg.crt_ep = __environ; - soarg.crt_bp = (caddr_t) &&retaddr; - - ldstart = (__typeof (ldstart)) (somap + soexec.a_entry); - (*ldstart) (1, (char *) &soarg - (char *) sp); - - retaddr: -} - -#endif |