diff options
Diffstat (limited to 'libc/sysdeps/linux/sh/crt1.S')
| -rw-r--r-- | libc/sysdeps/linux/sh/crt1.S | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/sh/crt1.S b/libc/sysdeps/linux/sh/crt1.S new file mode 100644 index 000000000..fc0ce355d --- /dev/null +++ b/libc/sysdeps/linux/sh/crt1.S @@ -0,0 +1,91 @@ +/* Startup code for SH & ELF. + Copyright (C) 1999 Free Software Foundation, Inc. + Copyright (C) 2001 Hewlett-Packard Australia + Copyright (C) 2002 Stefan Allius + + 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 +*/ + + +/* This is the canonical entry point, usually the first thing in the text + segment. + + At this entry point, most registers' values are unspecified, except: + + 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 +*/ + +#include <features.h> + + .text + .globl _start + .type _start,%function + .type main,%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 fini func onto the stack */ + mov.l r4,@-r15 + mov.l L_fini,r0 + mov.l r0,@-r15 + + /* Set up the main/init funcs that go in registers */ + mov.l L_main,r4 + mov.l L_init,r7 + + /* __uClibc_main (main, argc, argv, init, fini) */ + + /* Let the libc call main and exit with its return code. */ + mov.l L_uClibc_main,r1 + jsr @r1 + nop + /* We should not get here. */ + mov.l L_abort,r1 + jmp @r1 + nop + + .size _start,.-_start + .align 2 + +L_main: + .long main +L_init: + .long _init +L_fini: + .long _fini +L_uClibc_main: + .long __uClibc_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 |