diff options
Diffstat (limited to 'sysdeps/standalone')
| -rw-r--r-- | sysdeps/standalone/i386/force_cpu386/strtsupp.S | 92 | ||||
| -rw-r--r-- | sysdeps/standalone/i386/start.S | 302 | ||||
| -rw-r--r-- | sysdeps/standalone/i960/start.S | 148 | ||||
| -rw-r--r-- | sysdeps/standalone/m68k/m68020/start.S | 145 |
4 files changed, 340 insertions, 347 deletions
diff --git a/sysdeps/standalone/i386/force_cpu386/strtsupp.S b/sysdeps/standalone/i386/force_cpu386/strtsupp.S index 6b78a8c343..4016c81c90 100644 --- a/sysdeps/standalone/i386/force_cpu386/strtsupp.S +++ b/sysdeps/standalone/i386/force_cpu386/strtsupp.S @@ -1,27 +1,26 @@ -/* Copyright (C) 1994 Free Software Foundation, Inc. +/* 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 Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. - -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 -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + 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 Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ /* This file assists the board independent startup code by * loading the proper segment register values. The values - * loaded are dependent on the FORCEBUG. + * loaded are dependent on the FORCEBUG. * * NOTE: No stack has been established when this routine * is invoked. It returns by jumping back to the start code. @@ -29,20 +28,20 @@ Cambridge, MA 02139, USA. */ */ /* - * FORCEBUG loads us into a virtual address space which - * really starts at PHYSICAL_ADDRESS_BASE. - * + * FORCEBUG loads us into a virtual address space which + * really starts at PHYSICAL_ADDRESS_BASE. + * */ .set PHYSICAL_ADDRESS_BASE, 0x00002000 /* - * At reset time, FORCEBUG normally has the segment selectors preloaded. + * At reset time, FORCEBUG normally has the segment selectors preloaded. * If a human resets the instruction pointer, this will not have occurred. - * However, no guarantee can be made of the other registers if cs:ip was - * modified to restart the program. Because of this, the BSP reloads all - * segment registers (except cs) with the values they have following - * a reset. + * However, no guarantee can be made of the other registers if cs:ip was + * modified to restart the program. Because of this, the BSP reloads all + * segment registers (except cs) with the values they have following + * a reset. */ @@ -50,40 +49,39 @@ Cambridge, MA 02139, USA. */ .set RESET_DS, 0x40 # initial value of data segment register .set RESET_ES, 0x40 # initial value of extra segment register .set RESET_FS, 0x40 # initial value of "f" segment register -.set RESET_GS, 0x30 # initial value of "g" segment register +.set RESET_GS, 0x30 # initial value of "g" segment register #define LOAD_SEGMENTS(_value,_segreg) \ - movw $_value##,%ax ; \ - movw %ax,##_segreg + movw $_value##,%ax ; \ + movw %ax,##_segreg + - - .global _load_segments + .global _load_segments - .global _establish_stack + .global _establish_stack _load_segments: - LOAD_SEGMENTS( RESET_SS, %ss ) - LOAD_SEGMENTS( RESET_DS, %ds ) - LOAD_SEGMENTS( RESET_ES, %es ) - LOAD_SEGMENTS( RESET_FS, %fs ) - LOAD_SEGMENTS( RESET_GS, %gs ) + LOAD_SEGMENTS( RESET_SS, %ss ) + LOAD_SEGMENTS( RESET_DS, %ds ) + LOAD_SEGMENTS( RESET_ES, %es ) + LOAD_SEGMENTS( RESET_FS, %fs ) + LOAD_SEGMENTS( RESET_GS, %gs ) - jmp _establish_stack # return to the bsp entry code + jmp _establish_stack # return to the bsp entry code - .global _return_to_monitor + .global _return_to_monitor _return_to_monitor: - movb $0,%al - int $0x20 # restart FORCEbug - jmp start # FORCEbug does not reset PC + movb $0,%al + int $0x20 # restart FORCEbug + jmp start # FORCEbug does not reset PC - .data + .data - .global _Do_Load_IDT + .global _Do_Load_IDT _Do_Load_IDT: .byte 1 - .global _Do_Load_GDT + .global _Do_Load_GDT _Do_Load_GDT: .byte 0 - diff --git a/sysdeps/standalone/i386/start.S b/sysdeps/standalone/i386/start.S index 8331a331c1..41e0bfb135 100644 --- a/sysdeps/standalone/i386/start.S +++ b/sysdeps/standalone/i386/start.S @@ -1,23 +1,22 @@ -/* Copyright (C) 1994 Free Software Foundation, Inc. +/* 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 Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. - -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 -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + 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 Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ /* entry.s * @@ -28,28 +27,28 @@ Cambridge, MA 02139, USA. */ * */ - .data - .global _Do_Load_IDT - .global _Do_Load_GDT + .data + .global _Do_Load_IDT + .global _Do_Load_GDT - .text + .text .global start # GNU default entry point - .global _establish_stack + .global _establish_stack - .global _bsp_start - .global _load_segments - .global __exit + .global _bsp_start + .global _load_segments + .global __exit start: - nop - cli # DISABLE INTERRUPTS!!! + nop + cli # DISABLE INTERRUPTS!!! # # Load the segment registers # # NOTE: Upon return, gs will contain the segment descriptor for # a segment which maps directly to all of physical memory. # - jmp _load_segments # load board dependent segments + jmp _load_segments # load board dependent segments # # Set up the stack @@ -57,102 +56,102 @@ start: _establish_stack: - movl $stack_end,%esp # set stack pointer - movl $stack_end,%ebp # set base pointer + movl $stack_end,%esp # set stack pointer + movl $stack_end,%ebp # set base pointer # # Zero out the BSS segment # zero_bss: - cld # make direction flag count up - movl $_end,%ecx # find end of .bss - movl $_bss_start,%edi # edi = beginning of .bss - subl %edi,%ecx # ecx = size of .bss in bytes - shrl $2,%ecx # size of .bss in longs - xorl %eax,%eax # value to clear out memory - repne # while ecx != 0 - stosl # clear a long in the bss + cld # make direction flag count up + movl $_end,%ecx # find end of .bss + movl $_bss_start,%edi # edi = beginning of .bss + subl %edi,%ecx # ecx = size of .bss in bytes + shrl $2,%ecx # size of .bss in longs + xorl %eax,%eax # value to clear out memory + repne # while ecx != 0 + stosl # clear a long in the bss # # Set the C heap information for malloc # - movl $heap_size,___C_heap_size # set ___C_heap_size - movl $heap_memory,___C_heap_start # set ___C_heap_start + movl $heap_size,___C_heap_size # set ___C_heap_size + movl $heap_memory,___C_heap_start # set ___C_heap_start # # Copy the Global Descriptor Table to our space # - sgdt _Original_GDTR # save original GDT - movzwl _Original_GDTR_limit,%ecx # size of GDT in bytes; limit - # is 8192 entries * 8 bytes per + sgdt _Original_GDTR # save original GDT + movzwl _Original_GDTR_limit,%ecx # size of GDT in bytes; limit + # is 8192 entries * 8 bytes per - # make ds:esi point to the original GDT + # make ds:esi point to the original GDT - movl _Original_GDTR_base,%esi - push %ds # save ds - movw %gs,%ax - movw %ax,%ds + movl _Original_GDTR_base,%esi + push %ds # save ds + movw %gs,%ax + movw %ax,%ds - # make es:edi point to the new (our copy) GDT - movl $_Global_descriptor_table,%edi + # make es:edi point to the new (our copy) GDT + movl $_Global_descriptor_table,%edi - rep - movsb # copy the GDT (ds:esi -> es:edi) + rep + movsb # copy the GDT (ds:esi -> es:edi) - pop %ds # restore ds - - # Build and load new contents of GDTR - movw _Original_GDTR_limit,%ecx # set new limit - movw %cx,_New_GDTR_limit + pop %ds # restore ds - push $_Global_descriptor_table - push %es - call _Logical_to_physical - addl $6,%esp - movl %eax,_New_GDTR_base # set new base + # Build and load new contents of GDTR + movw _Original_GDTR_limit,%ecx # set new limit + movw %cx,_New_GDTR_limit - cmpb $0,_Do_Load_GDT # Should the new GDT be loaded? - je no_gdt_load # NO, then branch - lgdt _New_GDTR # load the new GDT + push $_Global_descriptor_table + push %es + call _Logical_to_physical + addl $6,%esp + movl %eax,_New_GDTR_base # set new base + + cmpb $0,_Do_Load_GDT # Should the new GDT be loaded? + je no_gdt_load # NO, then branch + lgdt _New_GDTR # load the new GDT no_gdt_load: # # Copy the Interrupt Descriptor Table to our space # - sidt _Original_IDTR # save original IDT - movzwl _Original_IDTR_limit,%ecx # size of IDT in bytes; limit - # is 256 entries * 8 bytes per - + sidt _Original_IDTR # save original IDT + movzwl _Original_IDTR_limit,%ecx # size of IDT in bytes; limit + # is 256 entries * 8 bytes per + - # make ds:esi point to the original IDT - movl _Original_IDTR_base,%esi + # make ds:esi point to the original IDT + movl _Original_IDTR_base,%esi - push %ds # save ds - movw %gs,%ax - movw %ax,%ds + push %ds # save ds + movw %gs,%ax + movw %ax,%ds - # make es:edi point to the new (our copy) IDT - movl $_Interrupt_descriptor_table,%edi + # make es:edi point to the new (our copy) IDT + movl $_Interrupt_descriptor_table,%edi - rep - movsb # copy the IDT (ds:esi -> es:edi) - pop %ds # restore ds + rep + movsb # copy the IDT (ds:esi -> es:edi) + pop %ds # restore ds - # Build and load new contents of IDTR - movw _Original_IDTR_limit,%ecx # set new limit - movw %cx,_New_IDTR_limit + # Build and load new contents of IDTR + movw _Original_IDTR_limit,%ecx # set new limit + movw %cx,_New_IDTR_limit - push $_Interrupt_descriptor_table - push %es - call _Logical_to_physical - addl $6,%esp - movl %eax,_New_IDTR_base # set new base + push $_Interrupt_descriptor_table + push %es + call _Logical_to_physical + addl $6,%esp + movl %eax,_New_IDTR_base # set new base - cmpb $0,_Do_Load_IDT # Should the new IDT be loaded? - je no_idt_load # NO, then branch - lidt _New_IDTR # load the new IDT + cmpb $0,_Do_Load_IDT # Should the new IDT be loaded? + je no_idt_load # NO, then branch + lidt _New_IDTR # load the new IDT no_idt_load: # @@ -163,44 +162,44 @@ no_idt_load: # exception. # - fninit # MUST USE NO-WAIT FORM + fninit # MUST USE NO-WAIT FORM - call __Board_Initialize # initialize the board + call __Board_Initialize # initialize the board - pushl $0 # envp = NULL - pushl $0 # argv = NULL - pushl $0 # argc = NULL - call ___libc_init # initialize the library and - # call main - addl $12,%esp - - pushl $0 # argc = NULL - call __exit # call the Board specific exit - addl $4,%esp + pushl $0 # envp = NULL + pushl $0 # argv = NULL + pushl $0 # argc = NULL + call ___libc_init # initialize the library and + # call main + addl $12,%esp + + pushl $0 # argc = NULL + call __exit # call the Board specific exit + addl $4,%esp # # Clean up # - .global _Bsp_cleanup + .global _Bsp_cleanup - .global _return_to_monitor + .global _return_to_monitor _Bsp_cleanup: - cmpb $0,_Do_Load_IDT # Was the new IDT loaded? - je no_idt_restore # NO, then branch - lidt _Original_IDTR # restore the new IDT + cmpb $0,_Do_Load_IDT # Was the new IDT loaded? + je no_idt_restore # NO, then branch + lidt _Original_IDTR # restore the new IDT no_idt_restore: - cmpb $0,_Do_Load_GDT # Was the new GDT loaded? - je no_gdt_restore # NO, then branch - lgdt _Original_GDTR # restore the new GDT + cmpb $0,_Do_Load_GDT # Was the new GDT loaded? + je no_gdt_restore # NO, then branch + lgdt _Original_GDTR # restore the new GDT no_gdt_restore: - jmp _return_to_monitor + jmp _return_to_monitor # -# void *Logical_to_physical( +# void *Logical_to_physical( # rtems_unsigned16 segment, # void *address # ); @@ -208,28 +207,28 @@ no_gdt_restore: # Returns thirty-two bit physical address for segment:address. # - .global _Logical_to_physical + .global _Logical_to_physical .set SEGMENT_ARG, 4 .set ADDRESS_ARG, 8 _Logical_to_physical: - xorl %eax,%eax # clear eax - movzwl SEGMENT_ARG(%esp),%ecx # ecx = segment value - movl $_Global_descriptor_table,%edx # edx = address of our GDT - addl %ecx,%edx # edx = address of desired entry - movb 7(%edx),%ah # ah = base 31:24 - movb 4(%edx),%al # al = base 23:16 - shll $16,%eax # move ax into correct bits - movw 2(%edx),%ax # ax = base 0:15 - movl ADDRESS_ARG(%esp),%ecx # ecx = address to convert - addl %eax,%ecx # ecx = physical address equivalent - movl %ecx,%eax # eax = ecx - ret - + xorl %eax,%eax # clear eax + movzwl SEGMENT_ARG(%esp),%ecx # ecx = segment value + movl $_Global_descriptor_table,%edx # edx = address of our GDT + addl %ecx,%edx # edx = address of desired entry + movb 7(%edx),%ah # ah = base 31:24 + movb 4(%edx),%al # al = base 23:16 + shll $16,%eax # move ax into correct bits + movw 2(%edx),%ax # ax = base 0:15 + movl ADDRESS_ARG(%esp),%ecx # ecx = address to convert + addl %eax,%ecx # ecx = physical address equivalent + movl %ecx,%eax # eax = ecx + ret + # -# void *Physical_to_logical( +# void *Physical_to_logical( # rtems_unsigned16 segment, # void *address # ); @@ -237,41 +236,41 @@ _Logical_to_physical: # Returns thirty-two bit physical address for segment:address. # - .global _Physical_to_logical + .global _Physical_to_logical #.set SEGMENT_ARG, 4 #.set ADDRESS_ARG, 8 -- use sets from above _Physical_to_logical: - xorl %eax,%eax # clear eax - movzwl SEGMENT_ARG(%esp),%ecx # ecx = segment value - movl $_Global_descriptor_table,%edx # edx = address of our GDT - addl %ecx,%edx # edx = address of desired entry - movb 7(%edx),%ah # ah = base 31:24 - movb 4(%edx),%al # al = base 23:16 - shll $16,%eax # move ax into correct bits - movw 2(%edx),%ax # ax = base 0:15 - movl ADDRESS_ARG(%esp),%ecx # ecx = address to convert - subl %eax,%ecx # ecx = logical address equivalent - movl %ecx,%eax # eax = ecx - ret - + xorl %eax,%eax # clear eax + movzwl SEGMENT_ARG(%esp),%ecx # ecx = segment value + movl $_Global_descriptor_table,%edx # edx = address of our GDT + addl %ecx,%edx # edx = address of desired entry + movb 7(%edx),%ah # ah = base 31:24 + movb 4(%edx),%al # al = base 23:16 + shll $16,%eax # move ax into correct bits + movw 2(%edx),%ax # ax = base 0:15 + movl ADDRESS_ARG(%esp),%ecx # ecx = address to convert + subl %eax,%ecx # ecx = logical address equivalent + movl %ecx,%eax # eax = ecx + ret + /* * Data Declarations. Start with a macro which helps declare space. */ - .bss + .bss #define DECLARE_SPACE(_name,_space,_align) \ - .globl _name ; \ - .align _align ; \ + .globl _name ; \ + .align _align ; \ _name##: .space _space #define DECLARE_LABEL(_name) \ - .globl _name ; \ -_name##: + .globl _name ; \ +_name##: #define DECLARE_PTR(_name) DECLARE_SPACE(_name,4,2) #define DECLARE_U32(_name) DECLARE_SPACE(_name,4,2) @@ -287,7 +286,7 @@ DECLARE_PTR(environ) DECLARE_LABEL(_errno) DECLARE_U32(errno) -/* +/* * Miscellaneous Variables used to restore the CPU state. * * Start with a macro to declare the space for the contents of @@ -295,8 +294,8 @@ DECLARE_U32(errno) */ #define DECLARE_DTR_SPACE(_name) \ - .global _name ; \ - .align 4 ; \ + .global _name ; \ + .align 4 ; \ _name##: ; \ _name##_limit: .space 2 ; \ _name##_base: .space 4 @@ -316,8 +315,7 @@ DECLARE_SPACE(_Physical_base_of_cs,4,4) * Stack Size and Space */ - .set stack_size, 0x20000 + .set stack_size, 0x20000 DECLARE_SPACE(stack_memory,stack_size,4) DECLARE_LABEL(stack_end) - diff --git a/sysdeps/standalone/i960/start.S b/sysdeps/standalone/i960/start.S index c14449d3ff..d86fb1440f 100644 --- a/sysdeps/standalone/i960/start.S +++ b/sysdeps/standalone/i960/start.S @@ -1,23 +1,22 @@ -/* Copyright (C) 1994 Free Software Foundation, Inc. +/* 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 Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. - -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 -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + 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 Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. + + 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 + Library General Public License for more details. + + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ /* entry.s * @@ -28,66 +27,66 @@ Cambridge, MA 02139, USA. */ * */ - .text - .globl start # GNU960 default entry point + .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 - */ + 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 + 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 */ + 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 */ + 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 */ + 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 + 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 /* @@ -95,13 +94,13 @@ init_frames: */ #define DECLARE_SPACE(_name,_space,_align) \ - .globl _name ; \ - .align _align ; \ + .globl _name ; \ + .align _align ; \ .comm _name##,_space #define DECLARE_LABEL(_name) \ - .globl _name ; \ -_name##: + .globl _name ; \ +_name##: #define DECLARE_PTR(_name) DECLARE_SPACE(_name,4,2) #define DECLARE_U32(_name) DECLARE_SPACE(_name,4,2) @@ -121,7 +120,7 @@ DECLARE_U32(errno) * Stack Size and Space */ - .set stack_size, 0x20000 + .set stack_size, 0x20000 DECLARE_SPACE(stack_memory,stack_size,4) DECLARE_LABEL(stack_end) @@ -130,8 +129,7 @@ DECLARE_LABEL(stack_end) * Heap Size and Space */ - .set heap_size, 0x20000 + .set heap_size, 0x20000 DECLARE_SPACE(heap_memory,heap_size,4) DECLARE_LABEL(heap_end) - diff --git a/sysdeps/standalone/m68k/m68020/start.S b/sysdeps/standalone/m68k/m68020/start.S index 9d7d779e04..fb6fd3eb1a 100644 --- a/sysdeps/standalone/m68k/m68020/start.S +++ b/sysdeps/standalone/m68k/m68020/start.S @@ -1,23 +1,22 @@ -/* Copyright (C) 1994, 1996 Free Software Foundation, Inc. +/* Copyright (C) 1994, 1996, 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. -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 Library General Public License as + published by the Free Software Foundation; either version 2 of the + License, or (at your option) any later version. -The GNU C Library is free software; you can redistribute it and/or -modify it under the terms of the GNU Library General Public License as -published by the Free Software Foundation; either version 2 of the -License, or (at your option) any later version. + 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 + Library General Public License for more details. -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 -Library General Public License for more details. - -You should have received a copy of the GNU Library General Public -License along with the GNU C Library; see the file COPYING.LIB. If -not, write to the Free Software Foundation, Inc., 675 Mass Ave, -Cambridge, MA 02139, USA. */ + You should have received a copy of the GNU Library General Public + License along with the GNU C Library; see the file COPYING.LIB. If not, + write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330, + Boston, MA 02111-1307, USA. */ /* entry.s * @@ -27,7 +26,7 @@ Cambridge, MA 02139, USA. */ * all initialization. */ - .text + .text .globl start | Default entry point .globl _start | Default entry point .globl M68Kvec | Vector Table @@ -37,90 +36,90 @@ start: _start: M68Kvec: | standard location for vectors _M68Kvec: | standard location for vectors - nop | for linkers with problem - | using location zero as entry - jmp around - .space 4088 | to avoid initial intr stack - | from 135BUG on MVME13? as entry - | and start code at 0x4000 + nop | for linkers with problem + | using location zero as entry + jmp around + .space 4088 | to avoid initial intr stack + | from 135BUG on MVME13? as entry + | and start code at 0x4000 around: - move.w %sr,initial_sr | save initial values - movec %isp,%a0 - movel %a0,initial_isp - movec %usp,%a0 - movel %a0,initial_usp - movec %msp,%a0 - movel %a0,initial_msp - oriw #0x0700,%sr | INTERRUPTS OFF!!! + move.w %sr,initial_sr | save initial values + movec %isp,%a0 + movel %a0,initial_isp + movec %usp,%a0 + movel %a0,initial_usp + movec %msp,%a0 + movel %a0,initial_msp + oriw #0x0700,%sr | INTERRUPTS OFF!!! - | - | zero out uninitialized data area - | + | + | zero out uninitialized data area + | zerobss: - moveal #end,%a0 | find end of .bss - moveal #_bss_start,%a1 | find beginning of .bss - movel #0,%d0 + moveal #end,%a0 | find end of .bss + moveal #_bss_start,%a1 | find beginning of .bss + movel #0,%d0 loop: movel #0,%a1@+ | to zero out uninitialized - cmpal %a0,%a1 - jlt loop | loop until _end reached - - movel #heap_size,__C_heap_size | set ___C_heap_size - movel #heap_memory,__C_heap_start | set ___C_heap_start - moveal #interrupt_stack_end,%a0 | set interrupt stack pointer - movec %a0,%isp - moveal #stack_end,%a0 | set master stack pointer - movec %a0,%msp - moveal #stack_end,%a6 | set base pointer - movw #0x3000,%sr | SUPV MODE,INTERRUPTS ON!!! + cmpal %a0,%a1 + jlt loop | loop until _end reached + + movel #heap_size,__C_heap_size | set ___C_heap_size + movel #heap_memory,__C_heap_start | set ___C_heap_start + moveal #interrupt_stack_end,%a0 | set interrupt stack pointer + movec %a0,%isp + moveal #stack_end,%a0 | set master stack pointer + movec %a0,%msp + moveal #stack_end,%a6 | set base pointer + movw #0x3000,%sr | SUPV MODE,INTERRUPTS ON!!! #ifdef NEED_UNDERSCORES - jsr __Board_Initialize | initialize the board + jsr __Board_Initialize | initialize the board #else - jsr _Board_Initialize | initialize the board + jsr _Board_Initialize | initialize the board #endif - move.l #0,%sp@- | envp = NULL - move.l #0,%sp@- | argv = NULL - move.l #0,%sp@- | argc = NULL + move.l #0,%sp@- | envp = NULL + move.l #0,%sp@- | argv = NULL + move.l #0,%sp@- | argc = NULL #ifdef NEED_UNDERSCORES - jsr ___libc_init | initialize the library and - | call main + jsr ___libc_init | initialize the library and + | call main #else - jsr __libc_init | initialize the library and - | call main + jsr __libc_init | initialize the library and + | call main #endif - add.l #12,%sp + add.l #12,%sp - move.l #0,%sp@- | argc = NULL - jsr __exit | call the Board specific exit - addq.l #4,%sp + move.l #0,%sp@- | argc = NULL + jsr __exit | call the Board specific exit + addq.l #4,%sp - move.l initial_isp,%a0 | if __exit returns then we can - movec %a0,%isp | restore the initial values - move.l initial_usp,%a0 - movec %a0,%usp - move.l initial_msp,%a0 - movec %a0,%msp - move.w initial_sr,%sr - rts + move.l initial_isp,%a0 | if __exit returns then we can + movec %a0,%isp | restore the initial values + move.l initial_usp,%a0 + movec %a0,%usp + move.l initial_msp,%a0 + movec %a0,%msp + move.w initial_sr,%sr + rts - .bss + .bss /* * So initial stack registers and status register can be saved. */ #define DECLARE_SPACE(_name,_space,_align) \ - .globl _name ; \ - .align _align ; \ + .globl _name ; \ + .align _align ; \ _name##: .space _space #define DECLARE_LABEL(_name) \ - .globl _name ; \ + .globl _name ; \ _name##: #define DECLARE_PTR(_name) DECLARE_SPACE(_name,4,2) @@ -147,7 +146,7 @@ DECLARE_U32(errno) * Stack Size and Space */ - .set stack_size, 0x20000 + .set stack_size, 0x20000 DECLARE_SPACE(stack_memory,stack_size,4) DECLARE_LABEL(stack_end) |