diff options
Diffstat (limited to 'src/third_party/unwind/dist/src/ia64/Ginstall_cursor.S')
| -rw-r--r-- | src/third_party/unwind/dist/src/ia64/Ginstall_cursor.S | 348 |
1 files changed, 348 insertions, 0 deletions
diff --git a/src/third_party/unwind/dist/src/ia64/Ginstall_cursor.S b/src/third_party/unwind/dist/src/ia64/Ginstall_cursor.S new file mode 100644 index 00000000000..6fb4401faa2 --- /dev/null +++ b/src/third_party/unwind/dist/src/ia64/Ginstall_cursor.S @@ -0,0 +1,348 @@ +/* libunwind - a platform-independent unwind library + Copyright (C) 2001-2003 Hewlett-Packard Co + Contributed by David Mosberger-Tang <davidm@hpl.hp.com> + +This file is part of libunwind. + +Permission is hereby granted, free of charge, to any person obtaining +a copy of this software and associated documentation files (the +"Software"), to deal in the Software without restriction, including +without limitation the rights to use, copy, modify, merge, publish, +distribute, sublicense, and/or sell copies of the Software, and to +permit persons to whom the Software is furnished to do so, subject to +the following conditions: + +The above copyright notice and this permission notice shall be +included in all copies or substantial portions of the Software. + +THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, +EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF +MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND +NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE +LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION +OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION +WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */ + +#include "ucontext_i.h" + +#ifdef UNW_LOCAL_ONLY +# include "Lcursor_i.h" +# define ia64_install_cursor _ULia64_install_cursor +#else +# include "Gcursor_i.h" +# define ia64_install_cursor _Uia64_install_cursor +#endif + +#define SYS_sigreturn 1181 + +#ifndef UNW_REMOTE_ONLY + +/* ia64_install_cursor (const cursor *c, long pri_unat, long *extra, + long bspstore, long dirty_size, long *dirty_partition, + long dirty_rnat) + + Restores the machine-state represented by C and thereby resumes execution + in that frame. If the frame or one of its descendants was interrupted + by a signal, all registers are restored (including the signal mask). + Otherwise, only the preserved registers, the global-pointer (r1), and + the exception-arguments (r15-r18) are restored. */ + +#define pRet p6 +#define pSig p7 + + .align 32 + .hidden ia64_install_cursor + .global ia64_install_cursor + .proc ia64_install_cursor +ia64_install_cursor: + alloc r3 = ar.pfs, 7, 0, 0, 0 + invala + add r2 = FR_LOC_OFF, in0 + ;; + + ld8 r16 = [r2], LOC_SIZE // r16 = loc[IA64_REG_FR16] + mov.m r10 = ar.rsc // (ar.rsc: ~ 12 cycle latency) + add r3 = FR_LOC_OFF + 16, in0 + ;; + + ld8 r17 = [r2], 2*LOC_SIZE // r17 = loc[IA64_REG_FR17] + ld8 r18 = [r3], 2*LOC_SIZE // r18 = loc[IA64_REG_FR18] + and r16 = -4, r16 + ;; + + ld8 r19 = [r2], 2*LOC_SIZE // r19 = loc[IA64_REG_FR19] + ld8 r20 = [r3], 2*LOC_SIZE // r20 = loc[IA64_REG_FR20] + and r17 = -4, r17 + ;; + + ldf.fill f16 = [r16] // f16 restored (don't touch no more) + ldf.fill f17 = [r17] // f17 restored (don't touch no more) + and r18 = -4, r18 + + ld8 r21 = [r2], 2*LOC_SIZE // r21 = loc[IA64_REG_FR21] + ld8 r22 = [r3], 2*LOC_SIZE // r22 = loc[IA64_REG_FR22] + and r19 = -4, r19 + ;; + + ldf.fill f18 = [r18] // f18 restored (don't touch no more) + ldf.fill f19 = [r19] // f19 restored (don't touch no more) + and r20 = -4, r20 + + ld8 r23 = [r2], 2*LOC_SIZE // r23 = loc[IA64_REG_FR23] + ld8 r24 = [r3], 2*LOC_SIZE // r24 = loc[IA64_REG_FR24] + and r21 = -4, r21 + ;; + + ldf.fill f20 = [r20] // f20 restored (don't touch no more) + ldf.fill f21 = [r21] // f21 restored (don't touch no more) + and r22 = -4, r22 + + ld8 r25 = [r2], 2*LOC_SIZE // r25 = loc[IA64_REG_FR25] + ld8 r26 = [r3], 2*LOC_SIZE // r26 = loc[IA64_REG_FR26] + and r23 = -4, r23 + ;; + + ldf.fill f22 = [r22] // f22 restored (don't touch no more) + ldf.fill f23 = [r23] // f23 restored (don't touch no more) + and r24 = -4, r24 + + ld8 r27 = [r2], 2*LOC_SIZE // r27 = loc[IA64_REG_FR27] + ld8 r28 = [r3], 2*LOC_SIZE // r28 = loc[IA64_REG_FR28] + and r25 = -4, r25 + ;; + + ldf.fill f24 = [r24] // f24 restored (don't touch no more) + ldf.fill f25 = [r25] // f25 restored (don't touch no more) + and r26 = -4, r26 + + ld8 r29 = [r2], 2*LOC_SIZE // r29 = loc[IA64_REG_FR29] + ld8 r30 = [r3], 2*LOC_SIZE // r30 = loc[IA64_REG_FR30] + and r27 = -4, r27 + ;; + + ldf.fill f26 = [r26] // f26 restored (don't touch no more) + ldf.fill f27 = [r27] // f27 restored (don't touch no more) + and r28 = -4, r28 + + ld8 r31 = [r2] // r31 = loc[IA64_REG_FR31] + mov.m ar.unat = in1 + and r29 = -4, r29 + ;; + + ldf.fill f28 = [r28] // f28 restored (don't touch no more) + ldf.fill f29 = [r29] // f29 restored (don't touch no more) + and r30 = -4, r30 + + ld8 r1 = [in2], 8 // gp restored (don't touch no more) + add r8 = SIGCONTEXT_ADDR_OFF, in0 + and r31 = -4, r31 + ;; + + ld8 r8 = [r8] // r8 = sigcontext_addr + and r11 = 0x1c, r10 // clear all but rsc.be and rsc.pl + add r2 = PFS_LOC_OFF, in0 + + ldf.fill f30 = [r30] // f30 restored (don't touch no more) + ldf.fill f31 = [r31] // f31 restored (don't touch no more) + add r3 = 8, in2 + ;; + + ld8.fill r4 = [in2], 16 // r4 restored (don't touch no more) + ld8.fill r5 = [r3], 16 // r5 restored (don't touch no more) + cmp.eq pRet, pSig = r0, r8 // sigcontext_addr == NULL? + ;; + ld8.fill r6 = [in2], 16 // r6 restored (don't touch no more) + ld8.fill r7 = [r3] // r7 restored (don't touch no more) + add r3 = IP_OFF, in0 + ;; + + ld8 r14 = [r2], (B1_LOC_OFF - PFS_LOC_OFF) // r14 = pfs_loc + ld8 r15 = [r3] // r15 = ip + add r3 = (B2_LOC_OFF - IP_OFF), r3 + ;; + + ld8 r16 = [r2], (B3_LOC_OFF - B1_LOC_OFF) // r16 = b1_loc + ld8 r17= [r3], (B4_LOC_OFF - B2_LOC_OFF) // r17 = b2_loc + and r14 = -4, r14 + ;; + + ld8 r18 = [r2], (B5_LOC_OFF - B3_LOC_OFF) // r18 = b3_loc + ld8 r19 = [r3], (F2_LOC_OFF - B4_LOC_OFF) // r19 = b4_loc + and r16 = -4, r16 + ;; + + ld8 r20 = [r2], (F3_LOC_OFF - B5_LOC_OFF) // r20 = b5_loc + ld8 r21 = [r3], (F4_LOC_OFF - F2_LOC_OFF) // r21 = f2_loc + and r17 = -4, r17 + ;; + + ld8 r16 = [r16] // r16 = *b1_loc + ld8 r17 = [r17] // r17 = *b2_loc + and r18 = -4, r18 + + ld8 r22 = [r2], (F5_LOC_OFF - F3_LOC_OFF) // r21 = f3_loc + ld8 r23 = [r3], (UNAT_LOC_OFF - F4_LOC_OFF) // r22 = f4_loc + and r19 = -4, r19 + ;; + + ld8 r18 = [r18] // r18 = *b3_loc + ld8 r19 = [r19] // r19 = *b4_loc + and r20 = -4, r20 + + ld8 r24 = [r2], (LC_LOC_OFF - F5_LOC_OFF) // r24 = f5_loc + ld8 r25 = [r3], (FPSR_LOC_OFF - UNAT_LOC_OFF) // r25 = unat_loc + and r21 = -4, r21 + ;; + + and r22 = -4, r22 + and r23 = -4, r23 + and r24 = -4, r24 + + ld8 r20 = [r20] // r20 = *b5_loc + ldf.fill f2 = [r21] // f2 restored (don't touch no more) + mov b1 = r16 // b1 restored (don't touch no more) + ;; + + ldf.fill f3 = [r22] // f3 restored (don't touch no more) + ldf.fill f4 = [r23] // f4 restored (don't touch no more) + mov b2 = r17 // b2 restored (don't touch no more) + + ld8 r26 = [r2], (RNAT_LOC_OFF - LC_LOC_OFF) // r26 = lc_loc + ld8 r27 = [r3] // r27 = fpsr_loc + and r25 = -4, r25 + + add r3 = (PSP_OFF - FPSR_LOC_OFF), r3 + nop 0 + nop 0 + ;; + + ldf.fill f5 = [r24] // f5 restored (don't touch no more) +(pRet) ld8 r25 = [r25] // r25 = *unat_loc + mov b3 = r18 // b3 restored (don't touch no more) + + ld8 r28 = [r2], (BSP_OFF - RNAT_LOC_OFF) // r28 = rnat_loc + ld8 r29 = [r3], (PR_OFF - PSP_OFF) // r29 = sp + mov b4 = r19 // b4 restored (don't touch no more) + + and r26 = -4, r26 + and r27 = -4, r27 + mov b5 = r20 // b5 restored (don't touch no more) + ;; + + ld8 r26 = [r26] // r26 = *lc_loc + ld8 r27 = [r27] // r27 = *fpsr_loc + and r28 = -4, r28 + + mov r30 = in3 // make backup-copy of new bsp + ld8 r31 = [r3] // r31 = pr + mov rp = r15 + ;; + + ld8 r28 = [r28] // r28 = rnat + mov.m ar.rsc = r11 // put RSE into enforced lazy mode + mov.i ar.lc = r26 // lc restored (don't touch no more) + ;; + + loadrs // drop dirty partition + mov r9 = in2 // make backup-copy of &extra[r16] + cmp.eq p8, p0 = in4, r0 // dirty-size == 0? +(p8) br.cond.dpnt.many .skip_load_dirty + + mov r2 = in4 // make backup-copy of dirty_size + mov r15 = in5 // make backup-copy of dirty_partition + mov r16 = in6 // make backup-copy of dirty_rnat + ;; + + alloc r3 = ar.pfs, 0, 0, 0, 0 // drop register frame + dep r11 = r2, r11, 16, 16 + ;; + mov.m ar.bspstore = r15 + ;; + mov.m ar.rnat = r16 + mov.m ar.rsc = r11 // 14 cycles latency to loadrs + ;; + loadrs // loadup new dirty partition + ;; + +.skip_load_dirty: + mov.m ar.bspstore = r30 // restore register backing-store + add r3 = 8, r9 // r3 = &extra[r16] + ;; + +(pRet) mov.m ar.fpsr = r27 // fpsr restored (don't touch no more) + mov.m ar.rnat = r28 +(pSig) br.cond.dpnt.many .next + +/****** Return via br.ret: */ + + ld8 r14 = [r14] // r14 = *pfs_loc + ld8 r15 = [r9], 16 // r15 restored (don't touch no more) + mov pr = r31, -1 // pr restored (don't touch no more) + ;; + + ld8 r16 = [r3], 16 // r16 restored (don't touch no more) + ld8 r17 = [r9] // r17 restored (don't touch no more) + nop.i 0 + ;; + + ld8 r18 = [r3] // r18 restored (don't touch no more) + mov.m ar.rsc = r10 // restore original ar.rsc + mov sp = r29 + + mov.m ar.unat = r25 // unat restored (don't touch no more) + mov.i ar.pfs = r14 + br.ret.sptk.many rp + ;; + +/****** Return via sigreturn(): */ + +.next: mov.m ar.rsc = r10 // restore original ar.rsc + add r2 = (SC_FR + 6*16), r8 + add r3 = (SC_FR + 7*16), r8 + ;; + + ldf.fill f6 = [r2], 32 + ldf.fill f7 = [r3], 32 + nop 0 + ;; + + ldf.fill f8 = [r2], 32 + ldf.fill f9 = [r3], 32 + nop 0 + ;; + + ldf.fill f10 = [r2], 32 + ldf.fill f11 = [r3], 32 + nop 0 + ;; + + ldf.fill f12 = [r2], 32 + ldf.fill f13 = [r3], 32 + nop 0 + ;; + + ldf.fill f14 = [r2], 32 + ldf.fill f15 = [r3], 32 + mov sp = r29 + ;; + +#if NEW_SYSCALL + add r2 = 8, tp;; + ld8 r2 = [r2] + mov r15 = SYS_sigreturn + mov b7 = r2 + br.call.sptk.many b6 = b7 + ;; +#else + mov r15 = SYS_sigreturn + break 0x100000 +#endif + break 0 // bug out if sigreturn() returns + + .endp ia64_install_cursor + +#endif /* !UNW_REMOTE_ONLY */ +#ifdef __linux__ + /* We do not need executable stack. */ + .section .note.GNU-stack,"",@progbits +#endif |