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Diffstat (limited to 'sysdeps/standalone/i960/start.S')
| -rw-r--r-- | sysdeps/standalone/i960/start.S | 152 |
1 files changed, 0 insertions, 152 deletions
diff --git a/sysdeps/standalone/i960/start.S b/sysdeps/standalone/i960/start.S deleted file mode 100644 index 579beb77fb..0000000000 --- a/sysdeps/standalone/i960/start.S +++ /dev/null @@ -1,152 +0,0 @@ -/* Copyright (C) 1994, 1997 Free Software Foundation, Inc. - Contributed by Joel Sherrill (jsherril@redstone-emh2.army.mil), - On-Line Applications Research Corporation. - 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 Lesser General Public - License as published by the Free Software Foundation; either - version 2.1 of the License, or (at your option) any later version. - - In addition to the permissions in the GNU Lesser General Public - License, the Free Software Foundation gives you unlimited - permission to link the compiled version of this file with other - programs, and to distribute those programs without any restriction - coming from the use of this file. (The GNU Lesser General Public - License restrictions do apply in other respects; for example, they - cover modification of the file, and distribution when not linked - into another program.) - - Note that people who make modified versions of this file are not - obligated to grant this special exception for their modified - versions; it is their choice whether to do so. The GNU Lesser - General Public License gives permission to release a modified - version without this exception; this exception also makes it - possible to release a modified version which carries forward this - exception. - - 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 - Lesser General Public License for more details. - - You should have received a copy of the GNU Lesser General Public - License along with the GNU C Library; if not, write to the Free - Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA - 02111-1307 USA. */ - -/* entry.s - * - * This file contains the entry point for the application. - * The name of this entry point is compiler dependent. - * It jumps to the BSP which is responsible for performing - * all initialization. - * - */ - - .text - .globl start # GNU960 default entry point - -start: - mov 3, r12 - modpc r12, r12, r12 # enable tracing/trace faults - mov g5, g5 # NOP - mov 0, g14 # initialize constant for C - - /* - * zero out uninitialized data area - */ -zerobss: - lda _end, r4 /* find end of .bss */ - lda _bss_start, r5 /* find beginning of .bss */ - ldconst 0, r6 - -loop: st r6, (r5) /* to zero out uninitialized */ - addo 4, r5, r5 /* data area */ - cmpobl r5, r4, loop /* loop until _end reached */ - - - lda heap_memory, r12 /* tell C lib where heap is */ - st r12,___C_heap_start - lda heap_size, r12 /* tell C lib how big heap is */ - st r12,___C_heap_size - lda stack_memory,r12 /* set up stack pointer: */ - mov r12, sp - mov 0, g14 /* initialize constant for C */ - - call init_frames - ret /* return to monitor */ - -init_frames: - ldconst 0x3b001000, g0 - ldconst 0x00009107, g1 - modac g1, g0, g0 /* set AC controls */ - - /* - * Call application mainline. - * Someday, real values of argc and argv will be set up. - * For now, they are set to 0. - */ - - callx __Board_Initialize /* Initialize the board */ - - ldconst 0,g0 - ldconst 0,g1 - ldconst 0,g2 - callx ___libc_init /* initialize the library and */ - /* call main */ - /* - * if we return from main, we have "fallen" off the end - * of the program, therefore status is 0 - * so move 0 to g0 (exit parameter) - */ - - mov 0, g0 - callx __exit - ret - - -/* - * Data Declarations. Start with a macro which helps declare space. - */ - -#define DECLARE_SPACE(_name,_space,_align) \ - .globl _name ; \ - .align _align ; \ -.comm _name##,_space - -#define DECLARE_LABEL(_name) \ - .globl _name ; \ -_name##: - -#define DECLARE_PTR(_name) DECLARE_SPACE(_name,4,2) -#define DECLARE_U32(_name) DECLARE_SPACE(_name,4,2) -#define DECLARE_U16(_name) DECLARE_SPACE(_name,2,1) - -/* - * Require environment stuff - */ - -DECLARE_LABEL(_environ) -DECLARE_PTR(environ) - -DECLARE_LABEL(_errno) -DECLARE_U32(errno) - -/* - * Stack Size and Space - */ - - .set stack_size, 0x20000 - -DECLARE_SPACE(stack_memory,stack_size,4) -DECLARE_LABEL(stack_end) - -/* - * Heap Size and Space - */ - - .set heap_size, 0x20000 - -DECLARE_SPACE(heap_memory,heap_size,4) -DECLARE_LABEL(heap_end) |