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101 lines
3.5 KiB
ArmAsm
101 lines
3.5 KiB
ArmAsm
/* Startup code for elf64-sparc
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Copyright (C) 1997-2017 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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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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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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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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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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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, see
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<http://www.gnu.org/licenses/>. */
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#include <sysdep.h>
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.section ".text"
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.align 4
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.global _start
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.type _start,#function
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_start:
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#ifdef SHARED
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SETUP_PIC_REG(l7)
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#endif
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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*8, %sp
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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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plus the bias we added, plus the magic v9 STACK_BIAS. */
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ldx [%sp+STACK_BIAS+22*8], %o1
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add %sp, STACK_BIAS+23*8, %o2
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/* Load the addresses of the user entry points. */
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#ifndef SHARED
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sethi %hi(main), %o0
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sethi %hi(__libc_csu_init), %o3
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sethi %hi(__libc_csu_fini), %o4
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or %o0, %lo(main), %o0
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or %o3, %lo(__libc_csu_init), %o3
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or %o4, %lo(__libc_csu_fini), %o4
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#else
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sethi %gdop_hix22(main), %o0
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sethi %gdop_hix22(__libc_csu_init), %o3
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sethi %gdop_hix22(__libc_csu_fini), %o4
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xor %o0, %gdop_lox10(main), %o0
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xor %o3, %gdop_lox10(__libc_csu_init), %o3
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xor %o4, %gdop_lox10(__libc_csu_fini), %o4
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ldx [%l7 + %o0], %o0, %gdop(main)
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ldx [%l7 + %o3], %o3, %gdop(__libc_csu_init)
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ldx [%l7 + %o4], %o4, %gdop(__libc_csu_fini)
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#endif
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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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/* Let libc do the rest of the initialization, and call main. */
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call __libc_start_main
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nop
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/* Die very horribly if exit returns. */
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illtrap 0
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.size _start, .-_start
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/* Define a symbol for the first piece of initialized data. */
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.data
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.globl __data_start
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__data_start:
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.long 0
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weak_alias (__data_start, data_start)
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