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-rw-r--r--src/UnwindRegistersRestore.S283
1 files changed, 145 insertions, 138 deletions
diff --git a/src/UnwindRegistersRestore.S b/src/UnwindRegistersRestore.S
index 389db67579cdf..8122bf3e1b2ea 100644
--- a/src/UnwindRegistersRestore.S
+++ b/src/UnwindRegistersRestore.S
@@ -1,9 +1,8 @@
//===-------------------- UnwindRegistersRestore.S ------------------------===//
//
-// The LLVM Compiler Infrastructure
-//
-// This file is dual licensed under the MIT and the University of Illinois Open
-// Source Licenses. See LICENSE.TXT for details.
+// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
+// See https://llvm.org/LICENSE.txt for license information.
+// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
@@ -14,7 +13,7 @@
#if !defined(__USING_SJLJ_EXCEPTIONS__)
#if defined(__i386__)
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_x866jumptoEv)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_x866jumptoEv)
#
# void libunwind::Registers_x86::jumpto()
#
@@ -61,7 +60,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_x866jumptoEv)
#elif defined(__x86_64__)
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind16Registers_x86_646jumptoEv)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind16Registers_x86_646jumptoEv)
#
# void libunwind::Registers_x86_64::jumpto()
#
@@ -130,7 +129,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind16Registers_x86_646jumptoEv)
#elif defined(__powerpc64__)
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_ppc646jumptoEv)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind15Registers_ppc646jumptoEv)
//
// void libunwind::Registers_ppc64::jumpto()
//
@@ -395,120 +394,120 @@ Lnovec:
#elif defined(__ppc__)
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_ppc6jumptoEv)
-;
-; void libunwind::Registers_ppc::jumpto()
-;
-; On entry:
-; thread_state pointer is in r3
-;
-
- ; restore integral registerrs
- ; skip r0 for now
- ; skip r1 for now
- lwz r2, 16(r3)
- ; skip r3 for now
- ; skip r4 for now
- ; skip r5 for now
- lwz r6, 32(r3)
- lwz r7, 36(r3)
- lwz r8, 40(r3)
- lwz r9, 44(r3)
- lwz r10, 48(r3)
- lwz r11, 52(r3)
- lwz r12, 56(r3)
- lwz r13, 60(r3)
- lwz r14, 64(r3)
- lwz r15, 68(r3)
- lwz r16, 72(r3)
- lwz r17, 76(r3)
- lwz r18, 80(r3)
- lwz r19, 84(r3)
- lwz r20, 88(r3)
- lwz r21, 92(r3)
- lwz r22, 96(r3)
- lwz r23,100(r3)
- lwz r24,104(r3)
- lwz r25,108(r3)
- lwz r26,112(r3)
- lwz r27,116(r3)
- lwz r28,120(r3)
- lwz r29,124(r3)
- lwz r30,128(r3)
- lwz r31,132(r3)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_ppc6jumptoEv)
+//
+// void libunwind::Registers_ppc::jumpto()
+//
+// On entry:
+// thread_state pointer is in r3
+//
- ; restore float registers
- lfd f0, 160(r3)
- lfd f1, 168(r3)
- lfd f2, 176(r3)
- lfd f3, 184(r3)
- lfd f4, 192(r3)
- lfd f5, 200(r3)
- lfd f6, 208(r3)
- lfd f7, 216(r3)
- lfd f8, 224(r3)
- lfd f9, 232(r3)
- lfd f10,240(r3)
- lfd f11,248(r3)
- lfd f12,256(r3)
- lfd f13,264(r3)
- lfd f14,272(r3)
- lfd f15,280(r3)
- lfd f16,288(r3)
- lfd f17,296(r3)
- lfd f18,304(r3)
- lfd f19,312(r3)
- lfd f20,320(r3)
- lfd f21,328(r3)
- lfd f22,336(r3)
- lfd f23,344(r3)
- lfd f24,352(r3)
- lfd f25,360(r3)
- lfd f26,368(r3)
- lfd f27,376(r3)
- lfd f28,384(r3)
- lfd f29,392(r3)
- lfd f30,400(r3)
- lfd f31,408(r3)
+ // restore integral registerrs
+ // skip r0 for now
+ // skip r1 for now
+ lwz %r2, 16(%r3)
+ // skip r3 for now
+ // skip r4 for now
+ // skip r5 for now
+ lwz %r6, 32(%r3)
+ lwz %r7, 36(%r3)
+ lwz %r8, 40(%r3)
+ lwz %r9, 44(%r3)
+ lwz %r10, 48(%r3)
+ lwz %r11, 52(%r3)
+ lwz %r12, 56(%r3)
+ lwz %r13, 60(%r3)
+ lwz %r14, 64(%r3)
+ lwz %r15, 68(%r3)
+ lwz %r16, 72(%r3)
+ lwz %r17, 76(%r3)
+ lwz %r18, 80(%r3)
+ lwz %r19, 84(%r3)
+ lwz %r20, 88(%r3)
+ lwz %r21, 92(%r3)
+ lwz %r22, 96(%r3)
+ lwz %r23,100(%r3)
+ lwz %r24,104(%r3)
+ lwz %r25,108(%r3)
+ lwz %r26,112(%r3)
+ lwz %r27,116(%r3)
+ lwz %r28,120(%r3)
+ lwz %r29,124(%r3)
+ lwz %r30,128(%r3)
+ lwz %r31,132(%r3)
- ; restore vector registers if any are in use
- lwz r5,156(r3) ; test VRsave
- cmpwi r5,0
- beq Lnovec
+ // restore float registers
+ lfd %f0, 160(%r3)
+ lfd %f1, 168(%r3)
+ lfd %f2, 176(%r3)
+ lfd %f3, 184(%r3)
+ lfd %f4, 192(%r3)
+ lfd %f5, 200(%r3)
+ lfd %f6, 208(%r3)
+ lfd %f7, 216(%r3)
+ lfd %f8, 224(%r3)
+ lfd %f9, 232(%r3)
+ lfd %f10,240(%r3)
+ lfd %f11,248(%r3)
+ lfd %f12,256(%r3)
+ lfd %f13,264(%r3)
+ lfd %f14,272(%r3)
+ lfd %f15,280(%r3)
+ lfd %f16,288(%r3)
+ lfd %f17,296(%r3)
+ lfd %f18,304(%r3)
+ lfd %f19,312(%r3)
+ lfd %f20,320(%r3)
+ lfd %f21,328(%r3)
+ lfd %f22,336(%r3)
+ lfd %f23,344(%r3)
+ lfd %f24,352(%r3)
+ lfd %f25,360(%r3)
+ lfd %f26,368(%r3)
+ lfd %f27,376(%r3)
+ lfd %f28,384(%r3)
+ lfd %f29,392(%r3)
+ lfd %f30,400(%r3)
+ lfd %f31,408(%r3)
- subi r4,r1,16
- rlwinm r4,r4,0,0,27 ; mask low 4-bits
- ; r4 is now a 16-byte aligned pointer into the red zone
- ; the _vectorRegisters may not be 16-byte aligned so copy via red zone temp buffer
+ // restore vector registers if any are in use
+ lwz %r5, 156(%r3) // test VRsave
+ cmpwi %r5, 0
+ beq Lnovec
+ subi %r4, %r1, 16
+ rlwinm %r4, %r4, 0, 0, 27 // mask low 4-bits
+ // r4 is now a 16-byte aligned pointer into the red zone
+ // the _vectorRegisters may not be 16-byte aligned so copy via red zone temp buffer
+
#define LOAD_VECTOR_UNALIGNEDl(_index) \
- andis. r0,r5,(1<<(15-_index)) @\
- beq Ldone ## _index @\
- lwz r0, 424+_index*16(r3) @\
- stw r0, 0(r4) @\
- lwz r0, 424+_index*16+4(r3) @\
- stw r0, 4(r4) @\
- lwz r0, 424+_index*16+8(r3) @\
- stw r0, 8(r4) @\
- lwz r0, 424+_index*16+12(r3)@\
- stw r0, 12(r4) @\
- lvx v ## _index,0,r4 @\
-Ldone ## _index:
+ andis. %r0, %r5, (1<<(15-_index)) SEPARATOR \
+ beq Ldone ## _index SEPARATOR \
+ lwz %r0, 424+_index*16(%r3) SEPARATOR \
+ stw %r0, 0(%r4) SEPARATOR \
+ lwz %r0, 424+_index*16+4(%r3) SEPARATOR \
+ stw %r0, 4(%r4) SEPARATOR \
+ lwz %r0, 424+_index*16+8(%r3) SEPARATOR \
+ stw %r0, 8(%r4) SEPARATOR \
+ lwz %r0, 424+_index*16+12(%r3) SEPARATOR \
+ stw %r0, 12(%r4) SEPARATOR \
+ lvx %v ## _index, 0, %r4 SEPARATOR \
+ Ldone ## _index:
#define LOAD_VECTOR_UNALIGNEDh(_index) \
- andi. r0,r5,(1<<(31-_index)) @\
- beq Ldone ## _index @\
- lwz r0, 424+_index*16(r3) @\
- stw r0, 0(r4) @\
- lwz r0, 424+_index*16+4(r3) @\
- stw r0, 4(r4) @\
- lwz r0, 424+_index*16+8(r3) @\
- stw r0, 8(r4) @\
- lwz r0, 424+_index*16+12(r3)@\
- stw r0, 12(r4) @\
- lvx v ## _index,0,r4 @\
- Ldone ## _index:
+ andi. %r0, %r5, (1<<(31-_index)) SEPARATOR \
+ beq Ldone ## _index SEPARATOR \
+ lwz %r0, 424+_index*16(%r3) SEPARATOR \
+ stw %r0, 0(%r4) SEPARATOR \
+ lwz %r0, 424+_index*16+4(%r3) SEPARATOR \
+ stw %r0, 4(%r4) SEPARATOR \
+ lwz %r0, 424+_index*16+8(%r3) SEPARATOR \
+ stw %r0, 8(%r4) SEPARATOR \
+ lwz %r0, 424+_index*16+12(%r3) SEPARATOR \
+ stw %r0, 12(%r4) SEPARATOR \
+ lvx %v ## _index, 0, %r4 SEPARATOR \
+ Ldone ## _index:
LOAD_VECTOR_UNALIGNEDl(0)
@@ -545,17 +544,17 @@ Ldone ## _index:
LOAD_VECTOR_UNALIGNEDh(31)
Lnovec:
- lwz r0, 136(r3) ; __cr
- mtocrf 255,r0
- lwz r0, 148(r3) ; __ctr
- mtctr r0
- lwz r0, 0(r3) ; __ssr0
- mtctr r0
- lwz r0, 8(r3) ; do r0 now
- lwz r5,28(r3) ; do r5 now
- lwz r4,24(r3) ; do r4 now
- lwz r1,12(r3) ; do sp now
- lwz r3,20(r3) ; do r3 last
+ lwz %r0, 136(%r3) // __cr
+ mtcr %r0
+ lwz %r0, 148(%r3) // __ctr
+ mtctr %r0
+ lwz %r0, 0(%r3) // __ssr0
+ mtctr %r0
+ lwz %r0, 8(%r3) // do r0 now
+ lwz %r5, 28(%r3) // do r5 now
+ lwz %r4, 24(%r3) // do r4 now
+ lwz %r1, 12(%r3) // do sp now
+ lwz %r3, 20(%r3) // do r3 last
bctr
#elif defined(__arm64__) || defined(__aarch64__)
@@ -567,7 +566,7 @@ Lnovec:
// thread_state pointer is in x0
//
.p2align 2
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_arm646jumptoEv)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind15Registers_arm646jumptoEv)
// skip restore of x0,x1 for now
ldp x2, x3, [x0, #0x010]
ldp x4, x5, [x0, #0x020]
@@ -576,7 +575,8 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_arm646jumptoEv)
ldp x10,x11, [x0, #0x050]
ldp x12,x13, [x0, #0x060]
ldp x14,x15, [x0, #0x070]
- ldp x16,x17, [x0, #0x080]
+ // x16 and x17 were clobbered by the call into the unwinder, so no point in
+ // restoring them.
ldp x18,x19, [x0, #0x090]
ldp x20,x21, [x0, #0x0A0]
ldp x22,x23, [x0, #0x0B0]
@@ -584,8 +584,6 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_arm646jumptoEv)
ldp x26,x27, [x0, #0x0D0]
ldp x28,x29, [x0, #0x0E0]
ldr x30, [x0, #0x100] // restore pc into lr
- ldr x1, [x0, #0x0F8]
- mov sp,x1 // restore sp
ldp d0, d1, [x0, #0x110]
ldp d2, d3, [x0, #0x120]
@@ -605,12 +603,21 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_arm646jumptoEv)
ldr d30, [x0, #0x200]
ldr d31, [x0, #0x208]
+ // Finally, restore sp. This must be done after the the last read from the
+ // context struct, because it is allocated on the stack, and an exception
+ // could clobber the de-allocated portion of the stack after sp has been
+ // restored.
+ ldr x16, [x0, #0x0F8]
ldp x0, x1, [x0, #0x000] // restore x0,x1
+ mov sp,x16 // restore sp
ret x30 // jump to pc
#elif defined(__arm__) && !defined(__APPLE__)
#if !defined(__ARM_ARCH_ISA_ARM)
+#if (__ARM_ARCH_ISA_THUMB == 2)
+ .syntax unified
+#endif
.thumb
#endif
@@ -621,7 +628,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_arm646jumptoEv)
@ thread_state pointer is in r0
@
.p2align 2
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm20restoreCoreAndJumpToEv)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm20restoreCoreAndJumpToEv)
#if !defined(__ARM_ARCH_ISA_ARM) && __ARM_ARCH_ISA_THUMB == 1
@ r8-r11: ldm into r1-r4, then mov to r8-r11
adds r0, #0x20
@@ -659,7 +666,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm20restoreCoreAndJu
#if defined(__ELF__)
.fpu vfpv3-d16
#endif
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFLDMDEPy)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFLDMDEPv)
@ VFP and iwMMX instructions are only available when compiling with the flags
@ that enable them. We do not want to do that in the library (because we do not
@ want the compiler to generate instructions that access those) but this is
@@ -680,7 +687,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFL
#if defined(__ELF__)
.fpu vfpv3-d16
#endif
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFLDMXEPy)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFLDMXEPv)
vldmia r0, {d0-d15} @ fldmiax is deprecated in ARMv7+ and now behaves like vldmia
JMP(lr)
@@ -694,7 +701,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreVFPWithFL
#if defined(__ELF__)
.fpu vfpv3
#endif
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreVFPv3EPy)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm12restoreVFPv3EPv)
vldmia r0, {d16-d31}
JMP(lr)
@@ -710,7 +717,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreVFPv3EPy)
#if defined(__ELF__)
.arch armv5te
#endif
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreiWMMXEPy)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm12restoreiWMMXEPv)
ldcl p1, cr0, [r0], #8 @ wldrd wR0, [r0], #8
ldcl p1, cr1, [r0], #8 @ wldrd wR1, [r0], #8
ldcl p1, cr2, [r0], #8 @ wldrd wR2, [r0], #8
@@ -739,7 +746,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm12restoreiWMMXEPy)
#if defined(__ELF__)
.arch armv5te
#endif
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreiWMMXControlEPj)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind13Registers_arm19restoreiWMMXControlEPj)
ldc2 p1, cr8, [r0], #4 @ wldrw wCGR0, [r0], #4
ldc2 p1, cr9, [r0], #4 @ wldrw wCGR1, [r0], #4
ldc2 p1, cr10, [r0], #4 @ wldrw wCGR2, [r0], #4
@@ -750,7 +757,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind13Registers_arm19restoreiWMMXCont
#elif defined(__or1k__)
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind14Registers_or1k6jumptoEv)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind14Registers_or1k6jumptoEv)
#
# void libunwind::Registers_or1k::jumpto()
#
@@ -809,7 +816,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind14Registers_or1k6jumptoEv)
// On entry:
// thread state pointer is in a0 ($4)
//
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind18Registers_mips_o326jumptoEv)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind18Registers_mips_o326jumptoEv)
.set push
.set noat
.set noreorder
@@ -918,7 +925,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind18Registers_mips_o326jumptoEv)
// On entry:
// thread state pointer is in a0 ($4)
//
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind21Registers_mips_newabi6jumptoEv)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind21Registers_mips_newabi6jumptoEv)
.set push
.set noat
.set noreorder
@@ -1008,7 +1015,7 @@ DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind21Registers_mips_newabi6jumptoEv)
// On entry:
// thread_state pointer is in o0
//
-DEFINE_LIBUNWIND_PRIVATE_FUNCTION(_ZN9libunwind15Registers_sparc6jumptoEv)
+DEFINE_LIBUNWIND_FUNCTION(_ZN9libunwind15Registers_sparc6jumptoEv)
ta 3
ldd [%o0 + 64], %l0
ldd [%o0 + 72], %l2
generated by cgit v1.3 (git 2.53.0) at 2026-09-02 13:19:15 +0000