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Diffstat (limited to 'libgloss/d30v/crt0.S')
| -rw-r--r-- | libgloss/d30v/crt0.S | 56 |
1 files changed, 56 insertions, 0 deletions
diff --git a/libgloss/d30v/crt0.S b/libgloss/d30v/crt0.S new file mode 100644 index 000000000..e2ca8a510 --- /dev/null +++ b/libgloss/d30v/crt0.S @@ -0,0 +1,56 @@ +/* + * crt0.S -- startup file for D30V systems. + * + * Copyright (c) 1997 Cygnus Support + * + * The authors hereby grant permission to use, copy, modify, distribute, + * and license this software and its documentation for any purpose, provided + * that existing copyright notices are retained in all copies and that this + * notice is included verbatim in any distributions. No written agreement, + * license, or royalty fee is required for any of the authorized uses. + * Modifications to this software may be copyrighted by their authors + * and need not follow the licensing terms described here, provided that + * the new terms are clearly indicated on the first page of each file where + * they apply. + */ + + .file "crt0.S" + .text + .globl _start + .extern main + .extern exit + .extern __stack + .extern __sbss_start + .extern __sbss_end + .extern __ebss_start + .extern __ebss_end + .extern __bss_start + .extern __bss_end + .extern memset + .type _start,@function + +_start: or.l sp,r0,__stack + + /* Zero the .sbss area */ + or.l r2,r0,__sbss_start + or.l r4,r0,__sbss_end + sub r4,r4,r2 || or.s r3,r0,0 + bsrtnz.l r4,(memset) + + /* Zero the .ebss area */ + or.l r2,r0,__ebss_start + or.l r4,r0,__ebss_end + sub r4,r4,r2 || or.s r3,r0,0 + bsrtnz.l r4,(memset) + + /* Zero the .bss area */ + or.l r2,r0,__bss_start + or.l r4,r0,__bss_end + sub r4,r4,r2 || or.s r3,r0,0 + bsrtnz.l r4,(memset) + + or.s r2,r0,0 || or.s r3,r0,0 + or r4,r0,0 || nop + jsr.l (main) + jsr.l (exit) + .size _start,.-_start |