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authorAndreas Jaeger <jaegerandi@gmail.com>2012-03-28 09:19:38 +0200
committerAndreas Jaeger <jaegerandi@gmail.com>2012-03-28 09:19:38 +0200
commit09ae94c11b4309b425fbbfaa095e64cac2ae8cb8 (patch)
treef38b9109ade97075e9410b6eea818bf69870db5e /sysdeps/sh/start.S
parent2f60e7a8bc36e5c3b7ea8969b95e562a62bd4ef1 (diff)
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Delete sysdeps/sh/elf
* sysdeps/sh/elf/configure.in: Moved to ... * sysdeps/sh/configure.in: ... here. * sysdeps/sh/elf/start.S: Moved to ... * sysdeps/sh/start.S: ... here. * sysdeps/sh/elf/configure: Delete file.
Diffstat (limited to 'sysdeps/sh/start.S')
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+/* Startup code for SH & ELF.
+ Copyright (C) 1999, 2001, 2002 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/>. */
+
+/* This is the canonical entry point, usually the first thing in the text
+ segment.
+
+ Note that the code in the .init section has already been run.
+ This includes _init and _libc_init
+
+
+ At this entry point, most registers' values are unspecified, except:
+
+ r4 Contains a function pointer to be registered with `atexit'.
+ This is how the dynamic linker arranges to have DT_FINI
+ functions called for shared libraries that have been loaded
+ before this code runs.
+
+ sp The stack contains the arguments and environment:
+ 0(sp) argc
+ 4(sp) argv[0]
+ ...
+ (4*argc)(sp) NULL
+ (4*(argc+1))(sp) envp[0]
+ ...
+ NULL
+*/
+
+ .text
+ .globl _start
+ .type _start,@function
+_start:
+ /* Clear the frame pointer since this is the outermost frame. */
+ mov #0, r14
+
+ /* Pop argc off the stack and save a pointer to argv */
+ mov.l @r15+,r5
+ mov r15, r6
+
+ /* Push the last arguments to main() onto the stack */
+ mov.l r4,@-r15
+ mov.l L_fini,r0
+ mov.l r0,@-r15
+
+ /* Set up the other arguments for main() that go in registers */
+ mov.l L_main,r4
+ mov.l L_init,r7
+
+ /* __libc_start_main (main, argc, argv, init, fini, rtld_fini) */
+
+ /* Let the libc call main and exit with its return code. */
+ mov.l L_libc_start_main,r1
+ jsr @r1
+ nop
+ /* should never get here....*/
+ mov.l L_abort,r1
+ jsr @r1
+ nop
+ .align 2
+L_main:
+ .long main
+L_init:
+ .long __libc_csu_init
+L_fini:
+ .long __libc_csu_fini
+L_libc_start_main:
+ .long __libc_start_main
+L_abort:
+ .long abort
+/* Define a symbol for the first piece of initialized data. */
+ .data
+ .globl __data_start
+__data_start:
+ .long 0
+ .weak data_start
+ data_start = __data_start
+ .global __fpscr_values
+__fpscr_values:
+ .long 0
+ .long 0x80000