diff options
Diffstat (limited to 'libc/sysdeps/linux/sh64/crt0.S')
-rw-r--r-- | libc/sysdeps/linux/sh64/crt0.S | 78 |
1 files changed, 78 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/sh64/crt0.S b/libc/sysdeps/linux/sh64/crt0.S new file mode 100644 index 000000000..bd54ba5e2 --- /dev/null +++ b/libc/sysdeps/linux/sh64/crt0.S @@ -0,0 +1,78 @@ +/* Startup code for SH5 & ELF. + Copyright (C) 1999 Free Software Foundation, Inc. + Copyright (C) 2001 Hewlett-Packard Australia + + 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 Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. 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 +*/ + + .file "crt0.S" + + .globl _start + .globl __main + + .type __uClibc_start_main,@function + + .section .text64,"xa" + .align 2 /* 2^2 = 4 */ + +_start: + /* Clear the frame pointer since this is the outermost frame. */ +### mov #0, r14 # qqq + + /* Pop argc off the stack and save a pointer to argv */ + ld.l r15, 0, r2 /* argc */ + addi r15, 4, r3 /* argv */ + + /* set up the value for the environment pointer r4 = (argc+1)*4+argv */ + addi r2, 1, r4 /* envp = argc + 1 */ + shlli r4, 2, r4 /* envp = envp * 4 */ + add r3, r4, r4 /* envp = envp + argv */ + + /* call main() */ + movi __uClibc_start_main,r17 + ptabs/l r17,tr0 + blink tr0,r18 + + /* should never get here....*/ +### movi abort@lh,r17 +### shori abort@ll,r17 + ptabs/l r17,tr0 + blink tr0,r63 /* call abort() => (r63) do not come back ... */ + + /* + * The following is a stub to stop the GNU toolchain + * from calling its C-RTL initialization routines. + */ +__main: + ptabs/l r18,tr0 + blink tr0,r63 + |