diff options
Diffstat (limited to 'sysdeps/standalone/i386/force_cpu386/strtsupp.S')
| -rw-r--r-- | sysdeps/standalone/i386/force_cpu386/strtsupp.S | 92 |
1 files changed, 45 insertions, 47 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 - |