+++ /dev/null
-/* vi: set sw=4 ts=4: */
-/* uClibc/sysdeps/linux/i386/crt0.S
- * Pull stuff off the stack and get uClibc moving.
- *
- * Copyright (C) 2000,2001 by Erik Andersen <andersen@uclibc.org>
- *
- * This program is free software; you can redistribute it and/or modify it
- * under the terms of the GNU Library General Public License as published by
- * the Free Software Foundation; either version 2 of the License, or (at your
- * option) any later version.
- *
- * This program 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 Library General Public License
- * for more details.
- *
- * You should have received a copy of the GNU Library General Public License
- * along with this program; if not, write to the Free Software Foundation,
- * Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
- */
-
-/* Stick in a dummy reference to main(), so that if an application
- * is linking when the main() function is in a static library (.a)
- * we can be sure that main() actually gets linked in */
-extern void main(int argc,void *argv,void *envp);
-void (*mainp)(int argc,void *argv,void *envp) = main;
-
-extern void __uClibc_main(int argc,void *argv,void *envp);
-
-
-void _start(void)
-{
- unsigned int argc;
- char **argv, **envp;
- unsigned long *stack;
-
- stack = ((unsigned long*)__builtin_frame_address(0))+16;
- argc = *stack;
- argv = (char **)stack + 1;
- envp = (char **)stack + argc + 2;
-
- __uClibc_main(argc, argv, envp);
-}
-
--- /dev/null
+/* Startup code for elf32-sparc
+ Copyright (C) 1997, 1998, 2002, 2004 Free Software Foundation, Inc.
+ This file is part of the GNU C Library.
+ Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
+
+ 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, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA. */
+
+/* Originally based on glibc's sysdeps/sparc/sparc{32,64}/elf/start.S */
+
+#include <features.h>
+#include <bits/wordsize.h>
+
+/* macro out the 32 / 64 bit differences */
+#if __WORDSIZE == 32
+# define STACK_BIAS 0
+# define ELE_SIZE 4
+# define LD ld
+#else
+# define STACK_BIAS 2047 /* see glibc/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h */
+# define ELE_SIZE 8
+# define LD ldx
+#endif
+
+.text
+.align 4
+.global _start
+.type _start,%function
+#if defined(__UCLIBC_CTOR_DTOR__)
+.type _init,%function
+.type _fini,%function
+#else
+.weak _init
+.weak _fini
+#endif
+.type __uClibc_main,%function
+/* Stick in a dummy reference to main(), so that if an application
+ * is linking when the main() function is in a static library (.a)
+ * we can be sure that main() actually gets linked in */
+.global main
+.type main,%function
+
+#ifdef __PIC__
+.LLGETPC0:
+ retl
+ add %o7, %l7, %l7
+#endif
+
+_start:
+#ifdef __PIC__
+ sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %l7
+ call .LLGETPC0
+ add %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7
+#endif
+
+ /* Terminate the stack frame, and reserve space for functions to
+ * drop their arguments. */
+ mov %g0, %fp
+ sub %sp, 6*ELE_SIZE, %sp
+
+ /* Extract the arguments and environment as encoded on the stack. The
+ * argument info starts after one register window (16 words) past the SP. */
+ LD [%sp+STACK_BIAS+22*ELE_SIZE], %o1 /* %o1 = argc */
+ add %sp, STACK_BIAS+23*ELE_SIZE, %o2 /* %o2 = argv */
+#if 0
+ mov %o1, %o7 /* envp = argc */
+ sll %o7, ELE_SIZE/2, %o7 /* envp *= 4 */
+ add %o2, %o7, %o7 /* envp += argv */
+#endif
+
+ /* Load the addresses of the user entry points. */
+ sethi %hi(main), %o0
+ sethi %hi(_init), %o3
+ sethi %hi(_fini), %o4
+ or %o0, %lo(main), %o0
+ or %o3, %lo(_init), %o3
+ or %o4, %lo(_fini), %o4
+#ifdef __PIC__
+ /* Need a little more magic when building PIC to get addr of main */
+ LD [%l7 + %o0], %o0
+ LD [%l7 + %o3], %o3
+ LD [%l7 + %o4], %o4
+#endif
+
+ /* When starting a binary via the dynamic linker, %g1 contains the
+ * address of the shared library termination function, which will be
+ * registered with atexit(). If we are statically linked, this will
+ * be NULL. */
+ mov %g1, %o5
+
+ /* Let libc do the rest of the initialization, and call main. */
+ call __uClibc_main
+ nop
+
+ /* Die very horribly if exit returns. */
+#if __WORDSIZE == 32
+ unimp
+#else
+ illtrap 0
+#endif
+
+.size _start,.-_start
+
+/* Define a symbol for the first piece of initialized data. */
+.data
+.global __data_start
+__data_start:
+.long 0
+.weak data_start
+ data_start = __data_start
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