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30891f35fa
We stopped adding "Contributed by" or similar lines in sources in 2012 in favour of git logs and keeping the Contributors section of the glibc manual up to date. Removing these lines makes the license header a bit more consistent across files and also removes the possibility of error in attribution when license blocks or files are copied across since the contributed-by lines don't actually reflect reality in those cases. Move all "Contributed by" and similar lines (Written by, Test by, etc.) into a new file CONTRIBUTED-BY to retain record of these contributions. These contributors are also mentioned in manual/contrib.texi, so we just maintain this additional record as a courtesy to the earlier developers. The following scripts were used to filter a list of files to edit in place and to clean up the CONTRIBUTED-BY file respectively. These were not added to the glibc sources because they're not expected to be of any use in future given that this is a one time task: https://gist.github.com/siddhesh/b5ecac94eabfd72ed2916d6d8157e7dc https://gist.github.com/siddhesh/15ea1f5e435ace9774f485030695ee02 Reviewed-by: Carlos O'Donell <carlos@redhat.com>
168 lines
4.3 KiB
ArmAsm
168 lines
4.3 KiB
ArmAsm
/* Copyright (C) 1999-2021 Free Software Foundation, Inc.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>.
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Note that __sigsetjmp() did NOT flush the register stack. Instead,
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we do it here since __longjmp() is usually much less frequently
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invoked than __sigsetjmp(). The only difficulty is that __sigsetjmp()
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didn't (and wouldn't be able to) save ar.rnat either. This is a problem
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because if we're not careful, we could end up loading random NaT bits.
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There are two cases:
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(i) ar.bsp < ia64_rse_rnat_addr(jmpbuf.ar_bsp)
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ar.rnat contains the desired bits---preserve ar.rnat
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across loadrs and write to ar.bspstore
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(ii) ar.bsp >= ia64_rse_rnat_addr(jmpbuf.ar_bsp)
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The desired ar.rnat is stored in
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ia64_rse_rnat_addr(jmpbuf.ar_bsp). Load those
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bits into ar.rnat after setting ar.bspstore. */
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#include <sysdep.h>
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#include <features.h>
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# define pPos p6 /* is rotate count positive? */
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# define pNeg p7 /* is rotate count negative? */
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/* __longjmp(__jmp_buf buf, int val) */
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LEAF(__longjmp)
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#ifdef CHECK_RSP
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alloc r8=ar.pfs,2,1,3,0
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CHECK_RSP
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#else
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alloc r8=ar.pfs,2,0,0,0
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#endif
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mov r27=ar.rsc
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add r2=0x98,in0 // r2 <- &jmpbuf.orig_jmp_buf_addr
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;;
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ld8 r8=[r2],-16 // r8 <- orig_jmp_buf_addr
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mov r10=ar.bsp
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and r11=~0x3,r27 // clear ar.rsc.mode
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;;
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flushrs // flush dirty regs to backing store (must be first in insn grp)
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ld8 r23=[r2],8 // r23 <- jmpbuf.ar_bsp
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sub r8=r8,in0 // r8 <- &orig_jmpbuf - &jmpbuf
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;;
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ld8 r25=[r2] // r25 <- jmpbuf.ar_unat
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extr.u r8=r8,3,6 // r8 <- (&orig_jmpbuf - &jmpbuf)/8 & 0x3f
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;;
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cmp.lt pNeg,pPos=r8,r0
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mov r2=in0
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;;
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(pPos) mov r16=r8
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(pNeg) add r16=64,r8
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(pPos) sub r17=64,r8
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(pNeg) sub r17=r0,r8
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;;
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mov ar.rsc=r11 // put RSE in enforced lazy mode
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shr.u r8=r25,r16
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add r3=8,in0 // r3 <- &jmpbuf.r1
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shl r9=r25,r17
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;;
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ld8.fill.nta r28=[r2],16 // r28 <- jmpbuf.sp
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or r25=r8,r9
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;;
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mov r26=ar.rnat
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mov ar.unat=r25 // setup ar.unat (NaT bits for r1, r4-r7, and r12)
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;;
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ld8.fill.nta gp=[r3],32 // r1 (gp)
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dep r11=-1,r23,3,6 // r11 <- ia64_rse_rnat_addr(jmpbuf.ar_bsp)
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mov sp=r28 // r12 (sp)
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;;
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ld8.nta r16=[r2],16 // caller's unat
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// ld8.nta r17=[r3],16 // fpsr
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;;
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ld8.fill.nta r4=[r2],16 // r4
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ld8.fill.nta r5=[r3],16 // r5 (gp)
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cmp.geu p8,p0=r10,r11 // p8 <- (ar.bsp >= jmpbuf.ar_bsp)
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;;
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ld8.fill.nta r6=[r2],16 // r6
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ld8.fill.nta r7=[r3],16 // r7
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;;
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mov ar.unat=r16 // restore caller's unat
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// mov ar.fpsr=r17 // restore fpsr
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;;
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ld8.nta r16=[r2],16 // b0
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ld8.nta r17=[r3],16 // b1
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;;
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(p8) ld8 r26=[r11] // r26 <- *ia64_rse_rnat_addr(jmpbuf.ar_bsp)
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mov ar.bspstore=r23 // restore ar.bspstore
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;;
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ld8.nta r18=[r2],16 // b2
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ld8.nta r19=[r3],16 // b3
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;;
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#ifdef PTR_DEMANGLE
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PTR_DEMANGLE (r16, r24)
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#endif
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ld8.nta r20=[r2],16 // b4
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ld8.nta r21=[r3],16 // b5
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;;
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ld8.nta r11=[r2],16 // ar.pfs
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ld8.nta r22=[r3],56 // ar.lc
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;;
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ld8.nta r24=[r2],32 // pr
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mov b0=r16
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;;
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ldf.fill.nta f2=[r2],32
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ldf.fill.nta f3=[r3],32
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mov b1=r17
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;;
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ldf.fill.nta f4=[r2],32
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ldf.fill.nta f5=[r3],32
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mov b2=r18
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;;
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ldf.fill.nta f16=[r2],32
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ldf.fill.nta f17=[r3],32
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mov b3=r19
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;;
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ldf.fill.nta f18=[r2],32
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ldf.fill.nta f19=[r3],32
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mov b4=r20
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;;
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ldf.fill.nta f20=[r2],32
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ldf.fill.nta f21=[r3],32
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mov b5=r21
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;;
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ldf.fill.nta f22=[r2],32
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ldf.fill.nta f23=[r3],32
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mov ar.lc=r22
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;;
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ldf.fill.nta f24=[r2],32
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ldf.fill.nta f25=[r3],32
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cmp.eq p8,p9=0,in1
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;;
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ldf.fill.nta f26=[r2],32
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ldf.fill.nta f27=[r3],32
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mov ar.pfs=r11
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;;
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ldf.fill.nta f28=[r2],32
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ldf.fill.nta f29=[r3],32
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;;
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ldf.fill.nta f30=[r2]
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ldf.fill.nta f31=[r3]
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(p8) mov r8=1
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mov ar.rnat=r26 // restore ar.rnat
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;;
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mov ar.rsc=r27 // restore ar.rsc
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(p9) mov r8=in1
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invala // virt. -> phys. regnum mapping may change
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mov pr=r24,-1
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ret
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END(__longjmp)
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