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+/* Startup code for elf32-sparc
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+ Copyright (C) 1997, 1998, 2002, 2004 Free Software Foundation, Inc.
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+ This file is part of the GNU C Library.
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+ Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997.
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+
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+ The GNU C Library is free software; you can redistribute it and/or
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+ modify it under the terms of the GNU Lesser General Public
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+ License as published by the Free Software Foundation; either
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+ version 2.1 of the License, or (at your option) any later version.
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+
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+ In addition to the permissions in the GNU Lesser General Public
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+ License, the Free Software Foundation gives you unlimited
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+ permission to link the compiled version of this file with other
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+ programs, and to distribute those programs without any restriction
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+ coming from the use of this file. (The GNU Lesser General Public
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+ License restrictions do apply in other respects; for example, they
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+ cover modification of the file, and distribution when not linked
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+ into another program.)
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+
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+ Note that people who make modified versions of this file are not
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+ obligated to grant this special exception for their modified
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+ versions; it is their choice whether to do so. The GNU Lesser
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+ General Public License gives permission to release a modified
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+ version without this exception; this exception also makes it
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+ possible to release a modified version which carries forward this
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+ exception.
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+
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+ The GNU C Library is distributed in the hope that it will be useful,
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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+ Lesser General Public License for more details.
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+
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+ You should have received a copy of the GNU Lesser General Public
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+ License along with the GNU C Library; if not, write to the Free
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+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
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+ 02111-1307 USA. */
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+
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+/* Originally based on glibc's sysdeps/sparc/sparc{32,64}/elf/start.S */
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+
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+#include <features.h>
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+#include <bits/wordsize.h>
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+
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+/* macro out the 32 / 64 bit differences */
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+#if __WORDSIZE == 32
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+# define STACK_BIAS 0
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+# define ELE_SIZE 4
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+# define LD ld
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+#else
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+# define STACK_BIAS 2047 /* see glibc/sysdeps/unix/sysv/linux/sparc/sparc64/sysdep.h */
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+# define ELE_SIZE 8
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+# define LD ldx
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+#endif
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+
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+.text
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+.align 4
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+.global _start
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+.type _start,%function
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+#if defined(__UCLIBC_CTOR_DTOR__)
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+.type _init,%function
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+.type _fini,%function
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+#else
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+.weak _init
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+.weak _fini
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+#endif
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+.type __uClibc_main,%function
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+/* Stick in a dummy reference to main(), so that if an application
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+ * is linking when the main() function is in a static library (.a)
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+ * we can be sure that main() actually gets linked in */
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+.global main
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+.type main,%function
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+
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+#ifdef __PIC__
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+.LLGETPC0:
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+ retl
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+ add %o7, %l7, %l7
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+#endif
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+
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+_start:
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+#ifdef __PIC__
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+ sethi %hi(_GLOBAL_OFFSET_TABLE_-4), %l7
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+ call .LLGETPC0
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+ add %l7, %lo(_GLOBAL_OFFSET_TABLE_+4), %l7
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+#endif
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+
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+ /* Terminate the stack frame, and reserve space for functions to
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+ * drop their arguments. */
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+ mov %g0, %fp
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+ sub %sp, 6*ELE_SIZE, %sp
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+
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+ /* Extract the arguments and environment as encoded on the stack. The
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+ * argument info starts after one register window (16 words) past the SP. */
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+ LD [%sp+STACK_BIAS+22*ELE_SIZE], %o1 /* %o1 = argc */
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+ add %sp, STACK_BIAS+23*ELE_SIZE, %o2 /* %o2 = argv */
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+#if 0
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+ mov %o1, %o7 /* envp = argc */
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+ sll %o7, ELE_SIZE/2, %o7 /* envp *= 4 */
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+ add %o2, %o7, %o7 /* envp += argv */
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+#endif
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+
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+ /* Load the addresses of the user entry points. */
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+ sethi %hi(main), %o0
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+ sethi %hi(_init), %o3
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+ sethi %hi(_fini), %o4
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+ or %o0, %lo(main), %o0
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+ or %o3, %lo(_init), %o3
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+ or %o4, %lo(_fini), %o4
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+#ifdef __PIC__
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+ /* Need a little more magic when building PIC to get addr of main */
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+ LD [%l7 + %o0], %o0
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+ LD [%l7 + %o3], %o3
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+ LD [%l7 + %o4], %o4
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+#endif
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+
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+ /* When starting a binary via the dynamic linker, %g1 contains the
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+ * address of the shared library termination function, which will be
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+ * registered with atexit(). If we are statically linked, this will
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+ * be NULL. */
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+ mov %g1, %o5
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+
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+ /* Let libc do the rest of the initialization, and call main. */
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+ call __uClibc_main
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+ nop
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+
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+ /* Die very horribly if exit returns. */
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+#if __WORDSIZE == 32
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+ unimp
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+#else
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+ illtrap 0
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+#endif
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+
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+.size _start,.-_start
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+
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+/* Define a symbol for the first piece of initialized data. */
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+.data
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+.global __data_start
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+__data_start:
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+.long 0
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+.weak data_start
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+ data_start = __data_start
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Mike Frysinger