WSL2-Linux-Kernel/arch/arm/mm/abort-ev5t.S

#include <linux/linkage.h>
#include <asm/assembler.h>
#include "abort-macro.S"
/*
 * Function: v5t_early_abort
 *
 * Params  : r2 = pt_regs
 *	   : r4 = aborted context pc
 *	   : r5 = aborted context psr
 *
 * Returns : r4 - r11, r13 preserved
 *
 * Purpose : obtain information about current aborted instruction.
 * Note: we read user space.  This means we might cause a data
 * abort here if the I-TLB and D-TLB aren't seeing the same
 * picture.  Unfortunately, this does happen.  We live with it.
 */
	.align	5
ENTRY(v5t_early_abort)
	mrc	p15, 0, r1, c5, c0, 0		@ get FSR
	mrc	p15, 0, r0, c6, c0, 0		@ get FAR
	do_thumb_abort fsr=r1, pc=r4, psr=r5, tmp=r3
	ldreq	r3, [r4]			@ read aborted ARM instruction
	bic	r1, r1, #1 << 11		@ clear bits 11 of FSR
	do_ldrd_abort tmp=ip, insn=r3
	tst	r3, #1 << 20			@ check write
	orreq	r1, r1, #1 << 11
	b	do_DataAbort
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-17 02:20:36 +04:00			`#include <linux/linkage.h>`
			`#include <asm/assembler.h>`
			`#include "abort-macro.S"`
			`/*`
			`* Function: v5t_early_abort`
			`*`
ARM: entry: data abort: tail-call the main data abort handler Tail-call the main C data abort handler code from the per-CPU helper code. Update the comments in the code wrt the new calling and return register state. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 19:01:26 +04:00			`* Params : r2 = pt_regs`
			`* : r4 = aborted context pc`
ARM: entry: data abort: arrange for CPU abort helpers to take pc/psr in r4/r5 Re-jig the CPU abort helpers to take the PC/PSR in r4/r5 rather than r2/r3. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 17:35:07 +04:00			`* : r5 = aborted context psr`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-17 02:20:36 +04:00			`*`
ARM: entry: data abort: tail-call the main data abort handler Tail-call the main C data abort handler code from the per-CPU helper code. Update the comments in the code wrt the new calling and return register state. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 19:01:26 +04:00			`* Returns : r4 - r11, r13 preserved`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-17 02:20:36 +04:00			`*`
			`* Purpose : obtain information about current aborted instruction.`
			`* Note: we read user space. This means we might cause a data`
			`* abort here if the I-TLB and D-TLB aren't seeing the same`
			`* picture. Unfortunately, this does happen. We live with it.`
			`*/`
			`.align 5`
			`ENTRY(v5t_early_abort)`
			`mrc p15, 0, r1, c5, c0, 0 @ get FSR`
			`mrc p15, 0, r0, c6, c0, 0 @ get FAR`
ARM: entry: data abort: arrange for CPU abort helpers to take pc/psr in r4/r5 Re-jig the CPU abort helpers to take the PC/PSR in r4/r5 rather than r2/r3. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 17:35:07 +04:00			`do_thumb_abort fsr=r1, pc=r4, psr=r5, tmp=r3`
			`ldreq r3, [r4] @ read aborted ARM instruction`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-17 02:20:36 +04:00			`bic r1, r1, #1 << 11 @ clear bits 11 of FSR`
ARM: entry: data abort: avoid using r2 in abort helpers This allows us to pass the pt_regs pointer in to these functions ready for tail-calling the abort handler. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 17:42:02 +04:00			`do_ldrd_abort tmp=ip, insn=r3`
Linux-2.6.12-rc2 Initial git repository build. I'm not bothering with the full history, even though we have it. We can create a separate "historical" git archive of that later if we want to, and in the meantime it's about 3.2GB when imported into git - space that would just make the early git days unnecessarily complicated, when we don't have a lot of good infrastructure for it. Let it rip! 2005-04-17 02:20:36 +04:00			`tst r3, #1 << 20 @ check write`
			`orreq r1, r1, #1 << 11`
ARM: entry: data abort: tail-call the main data abort handler Tail-call the main C data abort handler code from the per-CPU helper code. Update the comments in the code wrt the new calling and return register state. Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk> 2011-06-26 19:01:26 +04:00			`b do_DataAbort`