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Diffstat (limited to 'libgloss/crx/crt0.S')
| -rw-r--r-- | libgloss/crx/crt0.S | 93 |
1 files changed, 0 insertions, 93 deletions
diff --git a/libgloss/crx/crt0.S b/libgloss/crx/crt0.S deleted file mode 100644 index c49849728..000000000 --- a/libgloss/crx/crt0.S +++ /dev/null @@ -1,93 +0,0 @@ - ############################################################################## - # crt0.S -- CRX default start-up routine # - # # - # Copyright (c) 2004 National Semiconductor Corporation # - # # - # 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. # - # # - # This is the start routine of your CRX program. # - # It is linked with your application automatically. You can use # - # this routine as a template and modify it to your needs, yet this # - # file must be supplied for the compiler. # - # It is assumed that the following symbols are defined in your linker # - # script: __STACK_START, __ISTACK_START, __DATA_START, __DATA_END, # - # __DATA_IMAGE_START, __BSS_START, __BSS_END. # - ############################################################################## - - .text - .align 4 - .globl _main - .globl _start - .globl _atexit - .globl _exit - .globl __dispatch_table - -_start: - - #----------------------------------------------------------------------------# - # Initialize the stack pointers. The constants __STACK_START and # - # __ISTACK_START should be defined in the linker script. # - - movd $__STACK_START, sp - movd $__ISTACK_START, r0 - mtpr r0, isp - - #----------------------------------------------------------------------------# - # Initialize the default sections according to the linker script. # - - movd $__DATA_END, r4 - subd $__DATA_START, r4 - movd $__DATA_START, r2 - movd $__DATA_IMAGE_START, r3 - bal ra, _memcpy - movd $__BSS_END, r4 - subd $__BSS_START, r4 - movd $__BSS_START, r2 - movd $0, r3 - bal ra, _memset - - #----------------------------------------------------------------------------# - # Initialize the intbase (pointer to the dispatch table). # - - movd $__dispatch_table, r0 - mtpr r0, intbase - - #----------------------------------------------------------------------------# - # Handle global and static constructurs execution and setup # - # destructors to be called from exit. # - bal ra, _init - movd $_fini, r2 - bal ra, _atexit - - #----------------------------------------------------------------------------# - # Here you may add initializations that are specific to your # - # environment. For example: # - # 1. Configure wait states and other BIU parameters in order to get # - # the best performance out of your target (see the specification # - # document). # - # 2. Enable maskable interrupts that should be enabled when your # - # program starts to execute. # - - - #----------------------------------------------------------------------------# - # Jump to the main function in your application. # - - bal ra, _main - - #----------------------------------------------------------------------------# - # Upon returning from the main function (if it isn't an infinite loop), # - # jump to the exit function. The exit function is located in the # - # library 'libc.a'. # - - movd r0, r2 # _main return value is passed as a - # parameter to exit. - br _exit # returns control to the debugger. - |