[libunwind] Add UNW_AARCH64_* beside UNW_ARM64_*

The original libunwind project defines UNW_AARCH64_* instead of UNW_ARM64_*.
Rename the enum members to match. This allows some applications with simple
`unw_init_local` usage to migrate to llvm-project libunwind.

Note: the canonical names of `UNW_ARM_D{0..31}` are now `UNW_AARCH64_V{0..31}`,
to match the original libunwind.

UNW_ARM64_* are kept for now for compatibility. Some may be unneeded and can be
cleaned up in the future.

Reviewed By: #libunwind, compnerd

Differential Revision: https://reviews.llvm.org/D107996

1 files changed, 143 insertions, 70 deletions

diff --git a/libunwind/include/libunwind.h b/libunwind/include/libunwind.h
index 0feecd7bd6fc..5ba63e5b7e5b 100644
--- a/libunwind/include/libunwind.h
+++ b/libunwind/include/libunwind.h
@@ -493,77 +493,150 @@ enum {
 
 // 64-bit ARM64 registers
 enum {
-  UNW_ARM64_X0 = 0,
-  UNW_ARM64_X1 = 1,
-  UNW_ARM64_X2 = 2,
-  UNW_ARM64_X3 = 3,
-  UNW_ARM64_X4 = 4,
-  UNW_ARM64_X5 = 5,
-  UNW_ARM64_X6 = 6,
-  UNW_ARM64_X7 = 7,
-  UNW_ARM64_X8 = 8,
-  UNW_ARM64_X9 = 9,
-  UNW_ARM64_X10 = 10,
-  UNW_ARM64_X11 = 11,
-  UNW_ARM64_X12 = 12,
-  UNW_ARM64_X13 = 13,
-  UNW_ARM64_X14 = 14,
-  UNW_ARM64_X15 = 15,
-  UNW_ARM64_X16 = 16,
-  UNW_ARM64_X17 = 17,
-  UNW_ARM64_X18 = 18,
-  UNW_ARM64_X19 = 19,
-  UNW_ARM64_X20 = 20,
-  UNW_ARM64_X21 = 21,
-  UNW_ARM64_X22 = 22,
-  UNW_ARM64_X23 = 23,
-  UNW_ARM64_X24 = 24,
-  UNW_ARM64_X25 = 25,
-  UNW_ARM64_X26 = 26,
-  UNW_ARM64_X27 = 27,
-  UNW_ARM64_X28 = 28,
-  UNW_ARM64_X29 = 29,
-  UNW_ARM64_FP = 29,
-  UNW_ARM64_X30 = 30,
-  UNW_ARM64_LR = 30,
-  UNW_ARM64_X31 = 31,
-  UNW_ARM64_SP = 31,
-  UNW_ARM64_PC = 32,
-  // reserved block
-  UNW_ARM64_RA_SIGN_STATE = 34,
+  UNW_AARCH64_X0 = 0,
+  UNW_AARCH64_X1 = 1,
+  UNW_AARCH64_X2 = 2,
+  UNW_AARCH64_X3 = 3,
+  UNW_AARCH64_X4 = 4,
+  UNW_AARCH64_X5 = 5,
+  UNW_AARCH64_X6 = 6,
+  UNW_AARCH64_X7 = 7,
+  UNW_AARCH64_X8 = 8,
+  UNW_AARCH64_X9 = 9,
+  UNW_AARCH64_X10 = 10,
+  UNW_AARCH64_X11 = 11,
+  UNW_AARCH64_X12 = 12,
+  UNW_AARCH64_X13 = 13,
+  UNW_AARCH64_X14 = 14,
+  UNW_AARCH64_X15 = 15,
+  UNW_AARCH64_X16 = 16,
+  UNW_AARCH64_X17 = 17,
+  UNW_AARCH64_X18 = 18,
+  UNW_AARCH64_X19 = 19,
+  UNW_AARCH64_X20 = 20,
+  UNW_AARCH64_X21 = 21,
+  UNW_AARCH64_X22 = 22,
+  UNW_AARCH64_X23 = 23,
+  UNW_AARCH64_X24 = 24,
+  UNW_AARCH64_X25 = 25,
+  UNW_AARCH64_X26 = 26,
+  UNW_AARCH64_X27 = 27,
+  UNW_AARCH64_X28 = 28,
+  UNW_AARCH64_X29 = 29,
+  UNW_AARCH64_FP = 29,
+  UNW_AARCH64_X30 = 30,
+  UNW_AARCH64_LR = 30,
+  UNW_AARCH64_X31 = 31,
+  UNW_AARCH64_SP = 31,
+  UNW_AARCH64_PC = 32,
+
   // reserved block
-  UNW_ARM64_D0 = 64,
-  UNW_ARM64_D1 = 65,
-  UNW_ARM64_D2 = 66,
-  UNW_ARM64_D3 = 67,
-  UNW_ARM64_D4 = 68,
-  UNW_ARM64_D5 = 69,
-  UNW_ARM64_D6 = 70,
-  UNW_ARM64_D7 = 71,
-  UNW_ARM64_D8 = 72,
-  UNW_ARM64_D9 = 73,
-  UNW_ARM64_D10 = 74,
-  UNW_ARM64_D11 = 75,
-  UNW_ARM64_D12 = 76,
-  UNW_ARM64_D13 = 77,
-  UNW_ARM64_D14 = 78,
-  UNW_ARM64_D15 = 79,
-  UNW_ARM64_D16 = 80,
-  UNW_ARM64_D17 = 81,
-  UNW_ARM64_D18 = 82,
-  UNW_ARM64_D19 = 83,
-  UNW_ARM64_D20 = 84,
-  UNW_ARM64_D21 = 85,
-  UNW_ARM64_D22 = 86,
-  UNW_ARM64_D23 = 87,
-  UNW_ARM64_D24 = 88,
-  UNW_ARM64_D25 = 89,
-  UNW_ARM64_D26 = 90,
-  UNW_ARM64_D27 = 91,
-  UNW_ARM64_D28 = 92,
-  UNW_ARM64_D29 = 93,
-  UNW_ARM64_D30 = 94,
-  UNW_ARM64_D31 = 95,
+  UNW_AARCH64_RA_SIGN_STATE = 34,
+
+  // FP/vector registers
+  UNW_AARCH64_V0 = 64,
+  UNW_AARCH64_V1 = 65,
+  UNW_AARCH64_V2 = 66,
+  UNW_AARCH64_V3 = 67,
+  UNW_AARCH64_V4 = 68,
+  UNW_AARCH64_V5 = 69,
+  UNW_AARCH64_V6 = 70,
+  UNW_AARCH64_V7 = 71,
+  UNW_AARCH64_V8 = 72,
+  UNW_AARCH64_V9 = 73,
+  UNW_AARCH64_V10 = 74,
+  UNW_AARCH64_V11 = 75,
+  UNW_AARCH64_V12 = 76,
+  UNW_AARCH64_V13 = 77,
+  UNW_AARCH64_V14 = 78,
+  UNW_AARCH64_V15 = 79,
+  UNW_AARCH64_V16 = 80,
+  UNW_AARCH64_V17 = 81,
+  UNW_AARCH64_V18 = 82,
+  UNW_AARCH64_V19 = 83,
+  UNW_AARCH64_V20 = 84,
+  UNW_AARCH64_V21 = 85,
+  UNW_AARCH64_V22 = 86,
+  UNW_AARCH64_V23 = 87,
+  UNW_AARCH64_V24 = 88,
+  UNW_AARCH64_V25 = 89,
+  UNW_AARCH64_V26 = 90,
+  UNW_AARCH64_V27 = 91,
+  UNW_AARCH64_V28 = 92,
+  UNW_AARCH64_V29 = 93,
+  UNW_AARCH64_V30 = 94,
+  UNW_AARCH64_V31 = 95,
+
+  // Compatibility aliases
+  UNW_ARM64_X0 = UNW_AARCH64_X0,
+  UNW_ARM64_X1 = UNW_AARCH64_X1,
+  UNW_ARM64_X2 = UNW_AARCH64_X2,
+  UNW_ARM64_X3 = UNW_AARCH64_X3,
+  UNW_ARM64_X4 = UNW_AARCH64_X4,
+  UNW_ARM64_X5 = UNW_AARCH64_X5,
+  UNW_ARM64_X6 = UNW_AARCH64_X6,
+  UNW_ARM64_X7 = UNW_AARCH64_X7,
+  UNW_ARM64_X8 = UNW_AARCH64_X8,
+  UNW_ARM64_X9 = UNW_AARCH64_X9,
+  UNW_ARM64_X10 = UNW_AARCH64_X10,
+  UNW_ARM64_X11 = UNW_AARCH64_X11,
+  UNW_ARM64_X12 = UNW_AARCH64_X12,
+  UNW_ARM64_X13 = UNW_AARCH64_X13,
+  UNW_ARM64_X14 = UNW_AARCH64_X14,
+  UNW_ARM64_X15 = UNW_AARCH64_X15,
+  UNW_ARM64_X16 = UNW_AARCH64_X16,
+  UNW_ARM64_X17 = UNW_AARCH64_X17,
+  UNW_ARM64_X18 = UNW_AARCH64_X18,
+  UNW_ARM64_X19 = UNW_AARCH64_X19,
+  UNW_ARM64_X20 = UNW_AARCH64_X20,
+  UNW_ARM64_X21 = UNW_AARCH64_X21,
+  UNW_ARM64_X22 = UNW_AARCH64_X22,
+  UNW_ARM64_X23 = UNW_AARCH64_X23,
+  UNW_ARM64_X24 = UNW_AARCH64_X24,
+  UNW_ARM64_X25 = UNW_AARCH64_X25,
+  UNW_ARM64_X26 = UNW_AARCH64_X26,
+  UNW_ARM64_X27 = UNW_AARCH64_X27,
+  UNW_ARM64_X28 = UNW_AARCH64_X28,
+  UNW_ARM64_X29 = UNW_AARCH64_X29,
+  UNW_ARM64_FP = UNW_AARCH64_FP,
+  UNW_ARM64_X30 = UNW_AARCH64_X30,
+  UNW_ARM64_LR = UNW_AARCH64_LR,
+  UNW_ARM64_X31 = UNW_AARCH64_X31,
+  UNW_ARM64_SP = UNW_AARCH64_SP,
+  UNW_ARM64_PC = UNW_AARCH64_PC,
+  UNW_ARM64_RA_SIGN_STATE = UNW_AARCH64_RA_SIGN_STATE,
+  UNW_ARM64_D0 = UNW_AARCH64_V0,
+  UNW_ARM64_D1 = UNW_AARCH64_V1,
+  UNW_ARM64_D2 = UNW_AARCH64_V2,
+  UNW_ARM64_D3 = UNW_AARCH64_V3,
+  UNW_ARM64_D4 = UNW_AARCH64_V4,
+  UNW_ARM64_D5 = UNW_AARCH64_V5,
+  UNW_ARM64_D6 = UNW_AARCH64_V6,
+  UNW_ARM64_D7 = UNW_AARCH64_V7,
+  UNW_ARM64_D8 = UNW_AARCH64_V8,
+  UNW_ARM64_D9 = UNW_AARCH64_V9,
+  UNW_ARM64_D10 = UNW_AARCH64_V10,
+  UNW_ARM64_D11 = UNW_AARCH64_V11,
+  UNW_ARM64_D12 = UNW_AARCH64_V12,
+  UNW_ARM64_D13 = UNW_AARCH64_V13,
+  UNW_ARM64_D14 = UNW_AARCH64_V14,
+  UNW_ARM64_D15 = UNW_AARCH64_V15,
+  UNW_ARM64_D16 = UNW_AARCH64_V16,
+  UNW_ARM64_D17 = UNW_AARCH64_V17,
+  UNW_ARM64_D18 = UNW_AARCH64_V18,
+  UNW_ARM64_D19 = UNW_AARCH64_V19,
+  UNW_ARM64_D20 = UNW_AARCH64_V20,
+  UNW_ARM64_D21 = UNW_AARCH64_V21,
+  UNW_ARM64_D22 = UNW_AARCH64_V22,
+  UNW_ARM64_D23 = UNW_AARCH64_V23,
+  UNW_ARM64_D24 = UNW_AARCH64_V24,
+  UNW_ARM64_D25 = UNW_AARCH64_V25,
+  UNW_ARM64_D26 = UNW_AARCH64_V26,
+  UNW_ARM64_D27 = UNW_AARCH64_V27,
+  UNW_ARM64_D28 = UNW_AARCH64_V28,
+  UNW_ARM64_D29 = UNW_AARCH64_V29,
+  UNW_ARM64_D30 = UNW_AARCH64_V30,
+  UNW_ARM64_D31 = UNW_AARCH64_V31,
 };
 
 // 32-bit ARM registers. Numbers match DWARF for ARM spec #3.1 Table 1.