c3b75bd7bb
This makes the setjmp/longjmp code used by xmon, generically available to other code. It also removes the requirement for debugger hooks to be only called on 0x300 (data storage) exception. Signed-off-by: Michael Neuling <mikey@neuling.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
118 lines
2.4 KiB
ArmAsm
118 lines
2.4 KiB
ArmAsm
/*
|
|
* This file contains miscellaneous low-level functions.
|
|
* Copyright (C) 1995-1996 Gary Thomas (gdt@linuxppc.org)
|
|
*
|
|
* Largely rewritten by Cort Dougan (cort@cs.nmt.edu)
|
|
* and Paul Mackerras.
|
|
*
|
|
* Adapted for iSeries by Mike Corrigan (mikejc@us.ibm.com)
|
|
* PPC64 updates by Dave Engebretsen (engebret@us.ibm.com)
|
|
*
|
|
* setjmp/longjmp code by Paul Mackerras.
|
|
*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
#include <asm/ppc_asm.h>
|
|
#include <asm/unistd.h>
|
|
#include <asm/asm-compat.h>
|
|
#include <asm/asm-offsets.h>
|
|
|
|
.text
|
|
|
|
/*
|
|
* Returns (address we are running at) - (address we were linked at)
|
|
* for use before the text and data are mapped to KERNELBASE.
|
|
*/
|
|
|
|
_GLOBAL(reloc_offset)
|
|
mflr r0
|
|
bl 1f
|
|
1: mflr r3
|
|
LOAD_REG_IMMEDIATE(r4,1b)
|
|
subf r3,r4,r3
|
|
mtlr r0
|
|
blr
|
|
|
|
/*
|
|
* add_reloc_offset(x) returns x + reloc_offset().
|
|
*/
|
|
_GLOBAL(add_reloc_offset)
|
|
mflr r0
|
|
bl 1f
|
|
1: mflr r5
|
|
LOAD_REG_IMMEDIATE(r4,1b)
|
|
subf r5,r4,r5
|
|
add r3,r3,r5
|
|
mtlr r0
|
|
blr
|
|
|
|
_GLOBAL(kernel_execve)
|
|
li r0,__NR_execve
|
|
sc
|
|
bnslr
|
|
neg r3,r3
|
|
blr
|
|
|
|
_GLOBAL(setjmp)
|
|
mflr r0
|
|
PPC_STL r0,0(r3)
|
|
PPC_STL r1,SZL(r3)
|
|
PPC_STL r2,2*SZL(r3)
|
|
mfcr r0
|
|
PPC_STL r0,3*SZL(r3)
|
|
PPC_STL r13,4*SZL(r3)
|
|
PPC_STL r14,5*SZL(r3)
|
|
PPC_STL r15,6*SZL(r3)
|
|
PPC_STL r16,7*SZL(r3)
|
|
PPC_STL r17,8*SZL(r3)
|
|
PPC_STL r18,9*SZL(r3)
|
|
PPC_STL r19,10*SZL(r3)
|
|
PPC_STL r20,11*SZL(r3)
|
|
PPC_STL r21,12*SZL(r3)
|
|
PPC_STL r22,13*SZL(r3)
|
|
PPC_STL r23,14*SZL(r3)
|
|
PPC_STL r24,15*SZL(r3)
|
|
PPC_STL r25,16*SZL(r3)
|
|
PPC_STL r26,17*SZL(r3)
|
|
PPC_STL r27,18*SZL(r3)
|
|
PPC_STL r28,19*SZL(r3)
|
|
PPC_STL r29,20*SZL(r3)
|
|
PPC_STL r30,21*SZL(r3)
|
|
PPC_STL r31,22*SZL(r3)
|
|
li r3,0
|
|
blr
|
|
|
|
_GLOBAL(longjmp)
|
|
PPC_LCMPI r4,0
|
|
bne 1f
|
|
li r4,1
|
|
1: PPC_LL r13,4*SZL(r3)
|
|
PPC_LL r14,5*SZL(r3)
|
|
PPC_LL r15,6*SZL(r3)
|
|
PPC_LL r16,7*SZL(r3)
|
|
PPC_LL r17,8*SZL(r3)
|
|
PPC_LL r18,9*SZL(r3)
|
|
PPC_LL r19,10*SZL(r3)
|
|
PPC_LL r20,11*SZL(r3)
|
|
PPC_LL r21,12*SZL(r3)
|
|
PPC_LL r22,13*SZL(r3)
|
|
PPC_LL r23,14*SZL(r3)
|
|
PPC_LL r24,15*SZL(r3)
|
|
PPC_LL r25,16*SZL(r3)
|
|
PPC_LL r26,17*SZL(r3)
|
|
PPC_LL r27,18*SZL(r3)
|
|
PPC_LL r28,19*SZL(r3)
|
|
PPC_LL r29,20*SZL(r3)
|
|
PPC_LL r30,21*SZL(r3)
|
|
PPC_LL r31,22*SZL(r3)
|
|
PPC_LL r0,3*SZL(r3)
|
|
mtcrf 0x38,r0
|
|
PPC_LL r0,0(r3)
|
|
PPC_LL r1,SZL(r3)
|
|
PPC_LL r2,2*SZL(r3)
|
|
mtlr r0
|
|
mr r3,r4
|
|
blr
|