_setjmp.S revision 106904
182936Sdfr// $FreeBSD: head/lib/libc/ia64/gen/_setjmp.S 106904 2002-11-14 06:40:23Z marcel $ 282936Sdfr// 382936Sdfr// Copyright (c) 1999, 2000 482936Sdfr// Intel Corporation. 582936Sdfr// All rights reserved. 682936Sdfr// 782936Sdfr// Redistribution and use in source and binary forms, with or without 882936Sdfr// modification, are permitted provided that the following conditions 982936Sdfr// are met: 1082936Sdfr// 1182936Sdfr// 1. Redistributions of source code must retain the above copyright 1282936Sdfr// notice, this list of conditions and the following disclaimer. 1382936Sdfr// 1482936Sdfr// 2. Redistributions in binary form must reproduce the above copyright 1582936Sdfr// notice, this list of conditions and the following disclaimer in the 1682936Sdfr// documentation and/or other materials provided with the distribution. 1782936Sdfr// 1882936Sdfr// 3. All advertising materials mentioning features or use of this software 1982936Sdfr// must display the following acknowledgement: 2082936Sdfr// 2182936Sdfr// This product includes software developed by Intel Corporation and 2282936Sdfr// its contributors. 2382936Sdfr// 2482936Sdfr// 4. Neither the name of Intel Corporation or its contributors may be 2582936Sdfr// used to endorse or promote products derived from this software 2682936Sdfr// without specific prior written permission. 2782936Sdfr// 2882936Sdfr// THIS SOFTWARE IS PROVIDED BY INTEL CORPORATION AND CONTRIBUTORS ``AS IS'' 2982936Sdfr// AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 3082936Sdfr// IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 3182936Sdfr// ARE DISCLAIMED. IN NO EVENT SHALL INTEL CORPORATION OR CONTRIBUTORS BE 3282936Sdfr// LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 3382936Sdfr// CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 3482936Sdfr// SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 3582936Sdfr// INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 3682936Sdfr// CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 3782936Sdfr// ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF 3882936Sdfr// THE POSSIBILITY OF SUCH DAMAGE. 3982936Sdfr// 4082936Sdfr// 4167117Sdfr 4282936Sdfr// 4382936Sdfr// Module Name: 4482936Sdfr// 4582936Sdfr// setjmp.s 4682936Sdfr// 4782936Sdfr// Abstract: 4882936Sdfr// 4982936Sdfr// Contains an implementation of setjmp and longjmp for the 5082936Sdfr// IA-64 architecture. 5167117Sdfr 5282936Sdfr .file "setjmp.s" 5367117Sdfr 5482936Sdfr#define LOCORE 5582936Sdfr#include <machine/asm.h> 5682936Sdfr#include <machine/setjmp.h> 5767117Sdfr 5882936Sdfr// int _setjmp(struct jmp_buffer *) 5982936Sdfr// 6082936Sdfr// Setup a non-local goto. 6182936Sdfr// 6282936Sdfr// Description: 6382936Sdfr// 6482936Sdfr// SetJump stores the current register set in the area pointed to 6582936Sdfr// by "save". It returns zero. Subsequent calls to "LongJump" will 6682936Sdfr// restore the registers and return non-zero to the same location. 6782936Sdfr// 6882936Sdfr// On entry, r32 contains the pointer to the jmp_buffer 6982936Sdfr// 7082936Sdfr 7167117SdfrENTRY(_setjmp, 1) 7282936Sdfr add r10 = J_PREDS, r32 // skip Unats & pfs save area 7382936Sdfr add r11 = J_BSP, r32 7482936Sdfr // 7582936Sdfr // save immediate context 7682936Sdfr // 7782936Sdfr mov r2 = ar.bsp // save backing store pointer 7882936Sdfr mov r3 = pr // save predicates 7982936Sdfr flushrs 8082936Sdfr ;; 8182936Sdfr // 8282936Sdfr // save user Unat register 8382936Sdfr // 8482936Sdfr mov r16 = ar.lc // save loop count register 8582936Sdfr mov r14 = ar.unat // save user Unat register 8682936Sdfr 8782936Sdfr st8 [r10] = r3, J_LC-J_PREDS 8882936Sdfr st8 [r11] = r2, J_R4-J_BSP 8982936Sdfr ;; 9082936Sdfr st8 [r10] = r16, J_R5-J_LC 9182936Sdfr st8 [r32] = r14, J_NATS // Note: Unat at the 9282936Sdfr // beginning of the save area 9382936Sdfr mov r15 = ar.pfs 9482936Sdfr ;; 9582936Sdfr // 9682936Sdfr // save preserved general registers & NaT's 9782936Sdfr // 98106904Smarcel .mem.offset 0,0 9982936Sdfr st8.spill [r11] = r4, J_R6-J_R4 100106904Smarcel .mem.offset 8,0 101106904Smarcel st8.spill [r10] = r5, J_R7-J_R5 10282936Sdfr ;; 103106904Smarcel .mem.offset 16,0 10482936Sdfr st8.spill [r11] = r6, J_SP-J_R6 105106904Smarcel .mem.offset 24,0 10682936Sdfr st8.spill [r10] = r7, J_F3-J_R7 10782936Sdfr ;; 10882936Sdfr st8.spill [r11] = sp, J_F2-J_SP 109106904Smarcel mov r16 = ar.rsc 11082936Sdfr ;; 11182936Sdfr // 11282936Sdfr // save spilled Unat and pfs registers 11382936Sdfr // 11482936Sdfr mov r2 = ar.unat // save Unat register after spill 115106904Smarcel mov ar.rsc = r0 11682936Sdfr ;; 11782936Sdfr st8 [r32] = r2, J_PFS-J_NATS // save unat for spilled regs 118106904Smarcel mov r17 = ar.rnat 11982936Sdfr ;; 120106904Smarcel st8 [r32] = r15, J_RNAT-J_PFS // save pfs 121106904Smarcel mov ar.rsc = r16 12282936Sdfr // 12382936Sdfr // save floating registers 12482936Sdfr // 12582936Sdfr stf.spill [r11] = f2, J_F4-J_F2 12682936Sdfr stf.spill [r10] = f3, J_F5-J_F3 12782936Sdfr ;; 12882936Sdfr stf.spill [r11] = f4, J_F16-J_F4 12982936Sdfr stf.spill [r10] = f5, J_F17-J_F5 13082936Sdfr ;; 13182936Sdfr stf.spill [r11] = f16, J_F18-J_F16 13282936Sdfr stf.spill [r10] = f17, J_F19-J_F17 13382936Sdfr ;; 13482936Sdfr stf.spill [r11] = f18, J_F20-J_F18 13582936Sdfr stf.spill [r10] = f19, J_F21-J_F19 13682936Sdfr ;; 13782936Sdfr stf.spill [r11] = f20, J_F22-J_F20 13882936Sdfr stf.spill [r10] = f21, J_F23-J_F21 13982936Sdfr ;; 14082936Sdfr stf.spill [r11] = f22, J_F24-J_F22 14182936Sdfr stf.spill [r10] = f23, J_F25-J_F23 14282936Sdfr ;; 14382936Sdfr stf.spill [r11] = f24, J_F26-J_F24 14482936Sdfr stf.spill [r10] = f25, J_F27-J_F25 14582936Sdfr ;; 14682936Sdfr stf.spill [r11] = f26, J_F28-J_F26 14782936Sdfr stf.spill [r10] = f27, J_F29-J_F27 14882936Sdfr ;; 14982936Sdfr stf.spill [r11] = f28, J_F30-J_F28 15082936Sdfr stf.spill [r10] = f29, J_F31-J_F29 15182936Sdfr ;; 15282936Sdfr stf.spill [r11] = f30, J_FPSR-J_F30 15382936Sdfr stf.spill [r10] = f31, J_B0-J_F31 // size of f31 + fpsr 154106904Smarcel ;; 155106904Smarcel st8 [r32] = r17 15682936Sdfr // 15782936Sdfr // save FPSR register & branch registers 15882936Sdfr // 15982936Sdfr mov r2 = ar.fpsr // save fpsr register 16082936Sdfr mov r3 = b0 16182936Sdfr ;; 16282936Sdfr st8 [r11] = r2, J_B1-J_FPSR 16382936Sdfr st8 [r10] = r3, J_B2-J_B0 16482936Sdfr mov r2 = b1 16582936Sdfr mov r3 = b2 16682936Sdfr ;; 16782936Sdfr st8 [r11] = r2, J_B3-J_B1 16882936Sdfr st8 [r10] = r3, J_B4-J_B2 16982936Sdfr mov r2 = b3 17082936Sdfr mov r3 = b4 17182936Sdfr ;; 17282936Sdfr st8 [r11] = r2, J_B5-J_B3 17382936Sdfr st8 [r10] = r3 17482936Sdfr mov r2 = b5 17582936Sdfr ;; 17682936Sdfr st8 [r11] = r2 17782936Sdfr ;; 17882936Sdfr // 17982936Sdfr // return 18082936Sdfr // 18182936Sdfr mov r8 = r0 // return 0 from setjmp 18282936Sdfr mov ar.unat = r14 // restore unat 18382936Sdfr br.ret.sptk b0 18482936Sdfr 18567117SdfrEND(_setjmp) 18667117Sdfr 18767117Sdfr 18882936Sdfr// 18982936Sdfr// void _longjmp(struct jmp_buffer *, int val) 19082936Sdfr// 19182936Sdfr// Perform a non-local goto. 19282936Sdfr// 19382936Sdfr// Description: 19482936Sdfr// 19582936Sdfr// LongJump initializes the register set to the values saved by a 19682936Sdfr// previous 'SetJump' and jumps to the return location saved by that 19782936Sdfr// 'SetJump'. This has the effect of unwinding the stack and returning 19882936Sdfr// for a second time to the 'SetJump'. 19982936Sdfr// 20067117Sdfr 20185229Sdfr WEAK_ALIAS(_longjmp,___longjmp) 20285229SdfrENTRY(___longjmp, 2) 203106904Smarcel mov r14 = ar.rsc // get user RSC conf 20482936Sdfr mov r8 = r33 // return value 20582936Sdfr add r10 = J_PFS, r32 // get address of pfs 206106904Smarcel ;; 207106904Smarcel mov ar.rsc = r0 20882936Sdfr add r11 = J_NATS, r32 209106904Smarcel add r17 = J_RNAT, r32 21082936Sdfr ;; 21182936Sdfr ld8 r15 = [r10], J_BSP-J_PFS // get pfs 21282936Sdfr ld8 r2 = [r11], J_LC-J_NATS // get unat for spilled regs 213106904Smarcel mov r31 = r32 21482936Sdfr ;; 215106904Smarcel loadrs 21682936Sdfr mov ar.unat = r2 217106904Smarcel cmp.eq p6,p0=0,r8 // Return value 0? 21882936Sdfr ;; 21982936Sdfr ld8 r16 = [r10], J_PREDS-J_BSP // get backing store pointer 220106904Smarcel ld8 r17 = [r17] // ar.rnat 22182936Sdfr mov ar.pfs = r15 22282936Sdfr ;; 223106904Smarcel mov ar.bspstore = r16 224106904Smarcel(p6) add r8 = 1, r0 22582936Sdfr ;; 226106904Smarcel mov ar.rnat = r17 22782936Sdfr mov ar.rsc = r14 // restore RSC conf 22882936Sdfr 22982936Sdfr ld8 r3 = [r11], J_R4-J_LC // get lc register 23082936Sdfr ld8 r2 = [r10], J_R5-J_PREDS // get predicates 23182936Sdfr ;; 23282936Sdfr mov pr = r2, -1 23382936Sdfr mov ar.lc = r3 23482936Sdfr // 23582936Sdfr // restore preserved general registers & NaT's 23682936Sdfr // 23782936Sdfr ld8.fill r4 = [r11], J_R6-J_R4 23882936Sdfr ;; 23982936Sdfr ld8.fill r5 = [r10], J_R7-J_R5 24082936Sdfr ld8.fill r6 = [r11], J_SP-J_R6 24182936Sdfr ;; 24282936Sdfr ld8.fill r7 = [r10], J_F2-J_R7 24382936Sdfr ld8.fill sp = [r11], J_F3-J_SP 24482936Sdfr ;; 24582936Sdfr // 24682936Sdfr // restore floating registers 24782936Sdfr // 24882936Sdfr ldf.fill f2 = [r10], J_F4-J_F2 24982936Sdfr ldf.fill f3 = [r11], J_F5-J_F3 25082936Sdfr ;; 25182936Sdfr ldf.fill f4 = [r10], J_F16-J_F4 25282936Sdfr ldf.fill f5 = [r11], J_F17-J_F5 25382936Sdfr ;; 25482936Sdfr ldf.fill f16 = [r10], J_F18-J_F16 25582936Sdfr ldf.fill f17 = [r11], J_F19-J_F17 25682936Sdfr ;; 25782936Sdfr ldf.fill f18 = [r10], J_F20-J_F18 25882936Sdfr ldf.fill f19 = [r11], J_F21-J_F19 25982936Sdfr ;; 26082936Sdfr ldf.fill f20 = [r10], J_F22-J_F20 26182936Sdfr ldf.fill f21 = [r11], J_F23-J_F21 26282936Sdfr ;; 26382936Sdfr ldf.fill f22 = [r10], J_F24-J_F22 26482936Sdfr ldf.fill f23 = [r11], J_F25-J_F23 26582936Sdfr ;; 26682936Sdfr ldf.fill f24 = [r10], J_F26-J_F24 26782936Sdfr ldf.fill f25 = [r11], J_F27-J_F25 26882936Sdfr ;; 26982936Sdfr ldf.fill f26 = [r10], J_F28-J_F26 27082936Sdfr ldf.fill f27 = [r11], J_F29-J_F27 27182936Sdfr ;; 27282936Sdfr ldf.fill f28 = [r10], J_F30-J_F28 27382936Sdfr ldf.fill f29 = [r11], J_F31-J_F29 27482936Sdfr ;; 27582936Sdfr ldf.fill f30 = [r10], J_FPSR-J_F30 27682936Sdfr ldf.fill f31 = [r11], J_B0-J_F31 ;; 27782936Sdfr 27882936Sdfr // 27982936Sdfr // restore branch registers and fpsr 28082936Sdfr // 28182936Sdfr ld8 r16 = [r10], J_B1-J_FPSR // get fpsr 28282936Sdfr ld8 r17 = [r11], J_B2-J_B0 // get return pointer 28382936Sdfr ;; 28482936Sdfr mov ar.fpsr = r16 28582936Sdfr mov b0 = r17 28682936Sdfr ld8 r2 = [r10], J_B3-J_B1 28782936Sdfr ld8 r3 = [r11], J_B4-J_B2 28882936Sdfr ;; 28982936Sdfr mov b1 = r2 29082936Sdfr mov b2 = r3 29182936Sdfr ld8 r2 = [r10], J_B5-J_B3 292106904Smarcel ld8 r3 = [r11], 29382936Sdfr ;; 29482936Sdfr mov b3 = r2 29582936Sdfr mov b4 = r3 29682936Sdfr ld8 r2 = [r10] 297106904Smarcel ld8 r21 = [r31] // get user unat 29882936Sdfr ;; 29982936Sdfr mov b5 = r2 30082936Sdfr mov ar.unat = r21 30182936Sdfr 30282936Sdfr // 30382936Sdfr // invalidate ALAT 30482936Sdfr // 30582936Sdfr invala ;; 30682936Sdfr 30782936Sdfr br.ret.sptk b0 30882936Sdfr 30985229SdfrEND(___longjmp) 310