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https://github.com/tobast/libunwind-eh_elf.git
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176 lines
5.2 KiB
ArmAsm
176 lines
5.2 KiB
ArmAsm
/* libunwind - a platform-independent unwind library
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Copyright (C) 2003 Hewlett-Packard Co
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#include "ia64-test-stack.h"
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.common stackmem, NSTACKS*STACK_SIZE, 16
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.text
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#define SAVED_SP_OFF 0
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#define SAVED_RP_OFF 8
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#define SAVED_PFS_OFF 16
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#define SAVED_RNAT_OFF 24
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#define SAVED_BSP_OFF 32
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#define SAVED_BSPSTORE_OFF 40
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#define FRAME_SIZE 48
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.proc stack_it
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stack_it:
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.prologue
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alloc r18 = ar.pfs, 0, 0, 0, 0 // read ar.pfs
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// first, calculate address of new stack:
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addl r2 = @ltoff(stackmem), gp
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shl r3 = r8, STACK_SIZE_SHIFT
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;;
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ld8 r2 = [r2] // r2 = &stackmem
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;;
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add r2 = r2, r3 // r2 = stackmem[iteration]
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;;
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addl r3 = STACK_SIZE-FRAME_SIZE, r2 // r3 = &stackframe
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;;
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st8 [r3] = sp
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.vframesp SAVED_SP_OFF+16
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adds sp = -16, r3 // switch the memory stack
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;;
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adds r3 = (SAVED_RP_OFF - SAVED_SP_OFF), r3
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mov r16 = rp
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;;
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.savesp rp, SAVED_RP_OFF+16
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st8 [r3] = r16, (SAVED_PFS_OFF - SAVED_RP_OFF)
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;;
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.savesp ar.pfs, SAVED_PFS_OFF+16
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st8 [r3] = r18, (SAVED_BSP_OFF - SAVED_PFS_OFF)
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mov r16 = ar.bsp
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mov r17 = ar.bspstore
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mov r18 = ar.rnat
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;;
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.savesp ar.bsp, SAVED_BSP_OFF+16
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st8 [r3] = r16, (SAVED_BSPSTORE_OFF - SAVED_BSP_OFF)
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;;
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.savesp ar.bspstore, SAVED_BSPSTORE_OFF+16
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st8 [r3] = r17, (SAVED_RNAT_OFF - SAVED_BSPSTORE_OFF)
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;;
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.savesp ar.rnat, SAVED_RNAT_OFF+16
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st8 [r3] = r18
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;;
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mov ar.bspstore = r2 // switch the backing store
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.body
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// for even iterations, allocate a local variable:
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tbit.nz p6, p0 = r8, 0
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(p6) br.cond.sptk.few 1f
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;;
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alloc r2 = ar.pfs, 0, 1, 0, 0
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mov loc0 = r8
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;;
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1: cmp.ne p6, p7 = 0, r8
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;;
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{ .mbb
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(p6) adds r8 = -1, r8
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(p6) br.call.sptk.many rp = stack_it // next iteration
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(p7) br.call.sptk.many rp = do_unwind_tests // time for introspection...
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}
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// switch back to stack:
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adds r3 = SAVED_SP_OFF+16, sp
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;;
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ld8 r16 = [r3], (SAVED_RP_OFF-SAVED_SP_OFF);; // saved sp
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ld8 r17 = [r3], (SAVED_PFS_OFF-SAVED_RP_OFF);; // saved rp
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ld8 r18 = [r3], (SAVED_RNAT_OFF-SAVED_PFS_OFF);; // saved pfs
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ld8 r19 = [r3], (SAVED_BSP_OFF-SAVED_RNAT_OFF);; // saved rnat
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ld8 r20 = [r3], (SAVED_BSPSTORE_OFF-SAVED_BSP_OFF);; // saved bsp
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ld8 r21 = [r3];; // saved bspstore
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mov rp = r17
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mov ar.pfs = r18
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mov ar.bspstore = r21 // this also restores ar.bsp
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;;
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mov ar.rnat = r19
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.restore sp
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mov sp = r16
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br.ret.sptk.many rp
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.endp stack_it
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#define SET_LOC(n) add loc##n = n, r8
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#define SET_NAT(n) ld8.s loc##n = [r0]
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.global touch_all
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.proc touch_all
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touch_all:
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.prologue
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.save ar.pfs, r34
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alloc loc1 = ar.pfs, 1, 94, 1, 0
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.save rp, loc0
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mov loc0 = rp
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.body
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mov ar.rsc = 0 // put RSE into enforced lazy mode
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shl r8 = in0, 32 // store iteration # in top 32 bits
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add out0 = -1, in0
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cmp.eq p6, p7 = 1, in0
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;;
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SET_LOC( 2); SET_LOC( 3)
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SET_LOC( 4); SET_LOC( 5); SET_LOC( 6); SET_LOC( 7)
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SET_LOC( 8); SET_LOC( 9); SET_LOC(10); SET_LOC(11)
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SET_LOC(12); SET_LOC(13); SET_LOC(14); SET_LOC(15)
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SET_LOC(16); SET_LOC(17); SET_LOC(18); SET_LOC(19)
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SET_LOC(20); SET_LOC(21); SET_LOC(22); SET_LOC(23)
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SET_LOC(24); SET_LOC(25); SET_LOC(26); SET_LOC(27)
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SET_LOC(28); SET_LOC(29); SET_LOC(30); SET_LOC(31)
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SET_LOC(32); SET_LOC(33); SET_LOC(34); SET_LOC(35)
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SET_LOC(36); SET_LOC(37); SET_LOC(38); SET_LOC(39)
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SET_LOC(40); SET_LOC(41); SET_LOC(42); SET_LOC(43)
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SET_LOC(44); SET_LOC(45); SET_LOC(46); SET_LOC(47)
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SET_LOC(48); SET_LOC(49); SET_LOC(50); SET_LOC(51)
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SET_LOC(52); SET_LOC(53); SET_LOC(54); SET_LOC(55)
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SET_LOC(56); SET_LOC(57); SET_LOC(58); SET_LOC(59)
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SET_LOC(60); SET_LOC(61); SET_LOC(62); SET_LOC(63)
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SET_LOC(64); SET_LOC(65); SET_LOC(66); SET_LOC(67)
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SET_LOC(68); SET_LOC(69); SET_LOC(70); SET_LOC(71)
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SET_LOC(72); SET_LOC(73); SET_LOC(74); SET_LOC(75)
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SET_LOC(76); SET_LOC(77); SET_LOC(78); SET_LOC(79)
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SET_LOC(80); SET_LOC(81); SET_LOC(82); SET_LOC(83)
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SET_LOC(84); SET_LOC(85); SET_LOC(86); SET_LOC(87)
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SET_LOC(88); SET_LOC(89); SET_LOC(90); SET_LOC(91)
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SET_LOC(92); SET_LOC(93)
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;;
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SET_NAT(2); SET_NAT(31); SET_NAT(73); SET_NAT(93)
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;;
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{ .mbb
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mov r8=NSTACKS-1
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(p6) br.call.sptk.many rp = stack_it
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(p7) br.call.sptk.many rp = touch_all
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}
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;;
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mov rp = loc0
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mov ar.pfs = loc1
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br.ret.sptk.many rp
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.endp touch_all
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