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Diffstat (limited to 'sysdeps/sparc/sparc32/start.S')
| -rw-r--r-- | sysdeps/sparc/sparc32/start.S | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/sysdeps/sparc/sparc32/start.S b/sysdeps/sparc/sparc32/start.S new file mode 100644 index 0000000000..1efa8e8393 --- /dev/null +++ b/sysdeps/sparc/sparc32/start.S @@ -0,0 +1,100 @@ +/* Startup code for elf32-sparc + Copyright (C) 1997, 1998, 2002, 2004, 2007, 2009 + 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, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + + + .section ".text" + .align 4 + .global _start + .type _start,#function +_start: +#ifdef SHARED + SETUP_PIC_REG(l7) +#endif + + /* Terminate the stack frame, and reserve space for functions to + drop their arguments. */ + mov %g0, %fp + sub %sp, 6*4, %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+22*4], %o1 + add %sp, 23*4, %o2 + + /* Load the addresses of the user entry points. */ +#ifndef SHARED + sethi %hi(main), %o0 + sethi %hi(__libc_csu_init), %o3 + sethi %hi(__libc_csu_fini), %o4 + or %o0, %lo(main), %o0 + or %o3, %lo(__libc_csu_init), %o3 + or %o4, %lo(__libc_csu_fini), %o4 +#else + sethi %gdop_hix22(main), %o0 + sethi %gdop_hix22(__libc_csu_init), %o3 + sethi %gdop_hix22(__libc_csu_fini), %o4 + xor %o0, %gdop_lox10(main), %o0 + xor %o3, %gdop_lox10(__libc_csu_init), %o3 + xor %o4, %gdop_lox10(__libc_csu_fini), %o4 + ld [%l7 + %o0], %o0, %gdop(main) + ld [%l7 + %o3], %o3, %gdop(__libc_csu_init) + ld [%l7 + %o4], %o4, %gdop(__libc_csu_fini) +#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 __libc_start_main + nop + + /* Die very horribly if exit returns. */ + unimp + + .size _start, .-_start + +/* Define a symbol for the first piece of initialized data. */ + .data + .globl __data_start +__data_start: + .long 0 +weak_alias (__data_start, data_start) |