Commit ecd43afd authored by Vineet Gupta's avatar Vineet Gupta
Browse files

ARCv2: save r30 on kernel entry as gcc uses it for code-gen 



This is not exposed to userspace debugers yet, which can be done
independently as a seperate patch !

Signed-off-by: default avatarVineet Gupta <vgupta@synopsys.com>
parent e51d5d02

arch/arc/include/asm/entry-arcv2.h

+2 −0
Original line number Original line Diff line number Diff line
@@ -16,6 +16,7 @@ 
	;

	;

	; Now manually save: r12, sp, fp, gp, r25

	; Now manually save: r12, sp, fp, gp, r25





	PUSH	r30

	PUSH	r12

	PUSH	r12





	; Saving pt_regs->sp correctly requires some extra work due to the way

	; Saving pt_regs->sp correctly requires some extra work due to the way
@@ -72,6 +73,7 @@ 
	POPAX	AUX_USER_SP

	POPAX	AUX_USER_SP

1:

1:

	POP	r12

	POP	r12

	POP	r30





.endm

.endm

arch/arc/include/asm/ptrace.h

+1 −1
Original line number Original line Diff line number Diff line
@@ -84,7 +84,7 @@ struct pt_regs { 
	unsigned long fp;

	unsigned long fp;

	unsigned long sp;	/* user/kernel sp depending on where we came from  */

	unsigned long sp;	/* user/kernel sp depending on where we came from  */





	unsigned long r12;

	unsigned long r12, r30;





	/*------- Below list auto saved by h/w -----------*/

	/*------- Below list auto saved by h/w -----------*/

	unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;

	unsigned long r0, r1, r2, r3, r4, r5, r6, r7, r8, r9, r10, r11;