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Diffstat (limited to 'libgloss/mn10300/crt0.S')
| -rw-r--r-- | libgloss/mn10300/crt0.S | 58 |
1 files changed, 58 insertions, 0 deletions
diff --git a/libgloss/mn10300/crt0.S b/libgloss/mn10300/crt0.S new file mode 100644 index 000000000..f50e4259d --- /dev/null +++ b/libgloss/mn10300/crt0.S @@ -0,0 +1,58 @@ +##============================================================================== +## +## crt0.S +## +## MN10300 startup code +## +##============================================================================== +## +## Copyright (c) 1995, 1996, 1997, 1998 Cygnus Solutions +## +## 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" + +##------------------------------------------------------------------------------ +## Startup code + .section .text + .global _start +_start: + mov _stack-8,a0 # Load up the stack pointer + mov a0,sp + + mov _edata,a0 # Get the start/end of bss + mov _end,a1 + + cmp a0,a1 # If no bss, then do nothing + beq .L0 + + clr d0 # clear d0 + +.L1: + movbu d0,(a0) # Clear a byte and bump pointer + inc a0 + cmp a0,a1 + bne .L1 + +.L0: + call ___main,[],0 # Call __main to run ctors/dtors + clr d0 + clr d1 + mov d0,(4,sp) + call _main,[],0 # Call main program + call _exit,[],0 # All done, no need to return or + # deallocate our stack. + + .section .stack +_stack: .long 1 |