From 82cf6e18bc5e98fa203f98534bde1549a9263e4c Mon Sep 17 00:00:00 2001 From: Christian Svensson Date: Fri, 18 Jul 2014 00:27:58 +0200 Subject: setjmp/longjmp saves only non-call clobbered regs Previously we saved everything, but we only need to save the registers that are promised to be untouched by the setjmp call. --- libc/sysdeps/linux/or1k/__longjmp.S | 56 ++++++++++++------------------------- 1 file changed, 18 insertions(+), 38 deletions(-) (limited to 'libc/sysdeps/linux/or1k/__longjmp.S') diff --git a/libc/sysdeps/linux/or1k/__longjmp.S b/libc/sysdeps/linux/or1k/__longjmp.S index e49455fb1..6d40ab97d 100644 --- a/libc/sysdeps/linux/or1k/__longjmp.S +++ b/libc/sysdeps/linux/or1k/__longjmp.S @@ -2,7 +2,7 @@ Based on: longjmp for PowerPC. - Copyright (C) 1995, 1996, 1997, 1999, 2000 Free Software Foundation, Inc. + Copyright (C) 2014 Free Software Foundation, Inc. This file is part of the GNU C Library. The GNU C Library is free software; you can redistribute it and/or @@ -31,50 +31,30 @@ .type __longjmp,@function; .align 4; -__longjmp: -# l.lwz r11,(JB_SR*4)(r3) -# l.mtspr r0,r11,SPR_SR - l.lwz r1,((JB_GPRS+0)*4)(r3) - l.lwz r2,((JB_GPRS+1)*4)(r3) - /* pass through "value" to r11, then restore r4, for what it's worth" */ -#if 1 +__longjmp: + l.lwz r1,0(r3) + l.lwz r2,4(r3) + /* if r4 is 0, something wrong, so set it to 1 */ l.sfeqi r4, 0x0 l.bnf 1f /* r4 != 0, longjmp value sensible */ - l.nop + l.nop l.ori r4, r0, 0x1 /* make nonzero */ 1: -#endif l.addi r11, r4, 0 - l.lwz r4,((JB_GPRS+3)*4)(r3) - l.lwz r5,((JB_GPRS+4)*4)(r3) - l.lwz r6,((JB_GPRS+5)*4)(r3) - l.lwz r7,((JB_GPRS+6)*4)(r3) - l.lwz r8,((JB_GPRS+7)*4)(r3) - l.lwz r9,((JB_GPRS+8)*4)(r3) - l.lwz r10,((JB_GPRS+9)*4)(r3) - l.lwz r12,((JB_GPRS+11)*4)(r3) - l.lwz r13,((JB_GPRS+12)*4)(r3) - l.lwz r14,((JB_GPRS+13)*4)(r3) - l.lwz r15,((JB_GPRS+14)*4)(r3) - l.lwz r16,((JB_GPRS+15)*4)(r3) - l.lwz r17,((JB_GPRS+16)*4)(r3) - l.lwz r18,((JB_GPRS+17)*4)(r3) - l.lwz r19,((JB_GPRS+18)*4)(r3) - l.lwz r20,((JB_GPRS+19)*4)(r3) - l.lwz r21,((JB_GPRS+20)*4)(r3) - l.lwz r22,((JB_GPRS+21)*4)(r3) - l.lwz r23,((JB_GPRS+22)*4)(r3) - l.lwz r24,((JB_GPRS+23)*4)(r3) - l.lwz r25,((JB_GPRS+24)*4)(r3) - l.lwz r26,((JB_GPRS+25)*4)(r3) - l.lwz r27,((JB_GPRS+26)*4)(r3) - l.lwz r28,((JB_GPRS+27)*4)(r3) - l.lwz r29,((JB_GPRS+28)*4)(r3) - l.lwz r30,((JB_GPRS+29)*4)(r3) - l.lwz r31,((JB_GPRS+30)*4)(r3) + l.lwz r9,8(r3) + l.lwz r10,12(r3) + l.lwz r14,16(r3) + l.lwz r16,20(r3) + l.lwz r18,24(r3) + l.lwz r20,28(r3) + l.lwz r22,32(r3) + l.lwz r24,36(r3) + l.lwz r26,40(r3) + l.lwz r28,44(r3) + l.lwz r30,48(r3) l.jr r9 - l.nop + l.nop .size __longjmp,.-__longjmp libc_hidden_def(__longjmp) -- cgit v1.2.3