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authorMike Frysinger <vapier@gentoo.org>2006-02-04 01:20:54 +0000
committerMike Frysinger <vapier@gentoo.org>2006-02-04 01:20:54 +0000
commitc429bf3057c87dd9545fc2d824b5930c52f7dfb8 (patch)
treef207534c6a7a16795f8e7a099c1b48180e9db94f /libc/sysdeps/linux/ia64/__longjmp.S
parent798669dc65077f81b6facd2415463a1bda13c4d7 (diff)
import files from glibc for an ia64/static port
Diffstat (limited to 'libc/sysdeps/linux/ia64/__longjmp.S')
-rw-r--r--libc/sysdeps/linux/ia64/__longjmp.S160
1 files changed, 160 insertions, 0 deletions
diff --git a/libc/sysdeps/linux/ia64/__longjmp.S b/libc/sysdeps/linux/ia64/__longjmp.S
new file mode 100644
index 000000000..90f70e8e0
--- /dev/null
+++ b/libc/sysdeps/linux/ia64/__longjmp.S
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+/* Copyright (C) 1999, 2000, 2001 Free Software Foundation, Inc.
+ Contributed by David Mosberger-Tang <davidm@hpl.hp.com>.
+
+ The GNU C Library is free software; you can redistribute it and/or
+ modify it under the terms of the GNU Lesser General Public
+ License as published by the Free Software Foundation; either
+ version 2.1 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
+ Lesser General Public License for more details.
+
+ You should have received a copy of the GNU Lesser General Public
+ License along with the GNU C Library; if not, write to the Free
+ Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
+ 02111-1307 USA.
+
+ Note that __sigsetjmp() did NOT flush the register stack. Instead,
+ we do it here since __longjmp() is usually much less frequently
+ invoked than __sigsetjmp(). The only difficulty is that __sigsetjmp()
+ didn't (and wouldn't be able to) save ar.rnat either. This is a problem
+ because if we're not careful, we could end up loading random NaT bits.
+ There are two cases:
+
+ (i) ar.bsp < ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+ ar.rnat contains the desired bits---preserve ar.rnat
+ across loadrs and write to ar.bspstore
+
+ (ii) ar.bsp >= ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+ The desired ar.rnat is stored in
+ ia64_rse_rnat_addr(jmpbuf.ar_bsp). Load those
+ bits into ar.rnat after setting ar.bspstore. */
+
+#include "sysdep.h"
+#include <features.h>
+
+# define pPos p6 /* is rotate count positive? */
+# define pNeg p7 /* is rotate count negative? */
+
+
+ /* __longjmp(__jmp_buf buf, int val) */
+
+LEAF(__longjmp)
+ alloc r8=ar.pfs,2,1,0,0
+ mov r27=ar.rsc
+ add r2=0x98,in0 // r2 <- &jmpbuf.orig_jmp_buf_addr
+ ;;
+ ld8 r8=[r2],-16 // r8 <- orig_jmp_buf_addr
+ mov r10=ar.bsp
+ and r11=~0x3,r27 // clear ar.rsc.mode
+ ;;
+ flushrs // flush dirty regs to backing store (must be first in insn grp)
+ ld8 r23=[r2],8 // r23 <- jmpbuf.ar_bsp
+ sub r8=r8,in0 // r8 <- &orig_jmpbuf - &jmpbuf
+ ;;
+ ld8 r25=[r2] // r25 <- jmpbuf.ar_unat
+ extr.u r8=r8,3,6 // r8 <- (&orig_jmpbuf - &jmpbuf)/8 & 0x3f
+ ;;
+ cmp.lt pNeg,pPos=r8,r0
+ mov r2=in0
+ ;;
+(pPos) mov r16=r8
+(pNeg) add r16=64,r8
+(pPos) sub r17=64,r8
+(pNeg) sub r17=r0,r8
+ ;;
+ mov ar.rsc=r11 // put RSE in enforced lazy mode
+ shr.u r8=r25,r16
+ add r3=8,in0 // r3 <- &jmpbuf.r1
+ shl r9=r25,r17
+ ;;
+ or r25=r8,r9
+ ;;
+ mov r26=ar.rnat
+ mov ar.unat=r25 // setup ar.unat (NaT bits for r1, r4-r7, and r12)
+ ;;
+ ld8.fill.nta sp=[r2],16 // r12 (sp)
+ ld8.fill.nta gp=[r3],16 // r1 (gp)
+ dep r11=-1,r23,3,6 // r11 <- ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+ ;;
+ ld8.nta r16=[r2],16 // caller's unat
+ ld8.nta r17=[r3],16 // fpsr
+ ;;
+ ld8.fill.nta r4=[r2],16 // r4
+ ld8.fill.nta r5=[r3],16 // r5 (gp)
+ cmp.geu p8,p0=r10,r11 // p8 <- (ar.bsp >= jmpbuf.ar_bsp)
+ ;;
+ ld8.fill.nta r6=[r2],16 // r6
+ ld8.fill.nta r7=[r3],16 // r7
+ ;;
+ mov ar.unat=r16 // restore caller's unat
+ mov ar.fpsr=r17 // restore fpsr
+ ;;
+ ld8.nta r16=[r2],16 // b0
+ ld8.nta r17=[r3],16 // b1
+ ;;
+(p8) ld8 r26=[r11] // r26 <- *ia64_rse_rnat_addr(jmpbuf.ar_bsp)
+ mov ar.bspstore=r23 // restore ar.bspstore
+ ;;
+ ld8.nta r18=[r2],16 // b2
+ ld8.nta r19=[r3],16 // b3
+ ;;
+ ld8.nta r20=[r2],16 // b4
+ ld8.nta r21=[r3],16 // b5
+ ;;
+ ld8.nta r11=[r2],16 // ar.pfs
+ ld8.nta r22=[r3],56 // ar.lc
+ ;;
+ ld8.nta r24=[r2],32 // pr
+ mov b0=r16
+ ;;
+ ldf.fill.nta f2=[r2],32
+ ldf.fill.nta f3=[r3],32
+ mov b1=r17
+ ;;
+ ldf.fill.nta f4=[r2],32
+ ldf.fill.nta f5=[r3],32
+ mov b2=r18
+ ;;
+ ldf.fill.nta f16=[r2],32
+ ldf.fill.nta f17=[r3],32
+ mov b3=r19
+ ;;
+ ldf.fill.nta f18=[r2],32
+ ldf.fill.nta f19=[r3],32
+ mov b4=r20
+ ;;
+ ldf.fill.nta f20=[r2],32
+ ldf.fill.nta f21=[r3],32
+ mov b5=r21
+ ;;
+ ldf.fill.nta f22=[r2],32
+ ldf.fill.nta f23=[r3],32
+ mov ar.lc=r22
+ ;;
+ ldf.fill.nta f24=[r2],32
+ ldf.fill.nta f25=[r3],32
+ cmp.eq p8,p9=0,in1
+ ;;
+ ldf.fill.nta f26=[r2],32
+ ldf.fill.nta f27=[r3],32
+ mov ar.pfs=r11
+ ;;
+ ldf.fill.nta f28=[r2],32
+ ldf.fill.nta f29=[r3],32
+ ;;
+ ldf.fill.nta f30=[r2]
+ ldf.fill.nta f31=[r3]
+(p8) mov r8=1
+
+ mov ar.rnat=r26 // restore ar.rnat
+ ;;
+ mov ar.rsc=r27 // restore ar.rsc
+(p9) mov r8=in1
+
+ invala // virt. -> phys. regnum mapping may change
+ mov pr=r24,-1
+ ret
+END(__longjmp)