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Diffstat (limited to 'libgloss/pa/crt0.S')
| -rw-r--r-- | libgloss/pa/crt0.S | 128 |
1 files changed, 0 insertions, 128 deletions
diff --git a/libgloss/pa/crt0.S b/libgloss/pa/crt0.S deleted file mode 100644 index e9ea525a8..000000000 --- a/libgloss/pa/crt0.S +++ /dev/null @@ -1,128 +0,0 @@ -/* crt0.S -- startup file for hppa. - * - * Copyright (c) 1995 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. - */ - .VERSION "1.0" - .COPYRIGHT "crt0.o for the PA" - - .DATA - -/* - * Set up the standard spaces (sections) These definitions come - * from /lib/pcc_prefix.s. - */ - .TEXT - -/* - * stuff we need that's defined elsewhere. - */ - .IMPORT main, CODE - .IMPORT exit, CODE - .IMPORT _bss_start, DATA - .IMPORT _end, DATA - .IMPORT environ, DATA - -/* - * start -- set things up so the application will run. - * - */ - .PROC - .CALLINFO SAVE_SP, FRAME=48 - .EXPORT $START$,ENTRY -$START$ - - /* FIXME: this writes to page zero */ - ;; setup the %30 (stack pointer) with some memory - ldil L%_stack,%r30 - ldo R%_stack(%r30),%r30 - - ;; we need to set %r27 (global data pointer) here too - ldil L%$global$,%r27 - ldo R%$global$(%r27),%r27 ; same problem as above - -/* - * zerobss -- zero out the bss section - */ - ; load the start of bss - ldil L%_bss_start,%r4 - ldo R%_bss_start(%r4),%r4 - - ; load the end of bss - ldil L%_end,%r5 - ldo R%_end(%r5),%r5 - - -L$bssloop - addi -1,%r5,%r5 ; decrement _bss_end - stb %r0,0(0,%r5) ; we do this by bytes for now even - ; though it's slower, it's safer - combf,= %r4,%r5, L$bssloop - nop - - ldi 1,%ret0 - -/* - * Call the main routine from the application to get it going. - * main (argc, argv, environ) - * We pass argv as a pointer to NULL. - */ - - ldil L%main,%r22 - ble R%main(%sr4,%r22) - copy %r31,%r2 -/* - * Call exit() from the C library with the return value from main() - */ - copy %r28,%r26 - ldil L%exit,%r22 - ble R%exit(%sr4,%r22) - copy %r31,%r2 - - .PROCEND -/* - * _exit -- Exit from the application. Normally we cause a user trap - * to return to the ROM monitor for another run. - */ - .EXPORT _exit, ENTRY -_exit - .PROC - .CALLINFO - .ENTRY - - ;; This just causes a breakpoint exception - break 0x0,0x0 - bv,n (%rp) - nop - .EXIT - .PROCEND - -/* - * _sr4export -- support for called functions. (mostly for GDB) - */ - .EXPORT _sr4export, ENTRY -_sr4export: - .PROC - .CALLINFO - .ENTRY - - ble 0(%sr4,%r22) - copy %r31,%rp - ldw -24(%sr0,%sp),%rp - ldsid (%sr0,%rp),%r1 - mtsp %r1,%sr0 - be,n 0(%sr0,%rp) - nop - .EXIT - .PROCEND - - |