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third_party: Add libunwind (#1053)

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Added libunwind from LLVM 17.0.6.
The library includes functions required for C++ exception handling.
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Trung Nguyen 2024-01-06 15:04:30 +07:00 • committed by GitHub
parent 91de6f1f5d
commit b09096691a
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third_party/libunwind/include/__libunwind_config.h vendored Normal file
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//===----------------------------------------------------------------------===//
//
// 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
//
//===----------------------------------------------------------------------===//
#ifndef ____LIBUNWIND_CONFIG_H__
#define ____LIBUNWIND_CONFIG_H__
#define _LIBUNWIND_VERSION 15000
#if defined(__arm__) && !defined(__USING_SJLJ_EXCEPTIONS__) && \
!defined(__ARM_DWARF_EH__) && !defined(__SEH__)
#define _LIBUNWIND_ARM_EHABI
#endif
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86 8
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86_64 32
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC 112
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC64 116
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_ARM64 95
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_ARM 287
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_OR1K 32
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_MIPS 65
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_SPARC 31
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_SPARC64 31
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_HEXAGON 34
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_RISCV 64
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_VE 143
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_S390X 83
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER_LOONGARCH 64
#if defined(_LIBUNWIND_IS_NATIVE_ONLY)
# if defined(__linux__)
# define _LIBUNWIND_TARGET_LINUX 1
# endif
# if defined(__i386__)
# define _LIBUNWIND_TARGET_I386
# define _LIBUNWIND_CONTEXT_SIZE 8
# define _LIBUNWIND_CURSOR_SIZE 15
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86
# elif defined(__x86_64__)
# define _LIBUNWIND_TARGET_X86_64 1
# if defined(_WIN64)
# define _LIBUNWIND_CONTEXT_SIZE 54
# ifdef __SEH__
# define _LIBUNWIND_CURSOR_SIZE 204
# else
# define _LIBUNWIND_CURSOR_SIZE 66
# endif
# else
# define _LIBUNWIND_CONTEXT_SIZE 21
# define _LIBUNWIND_CURSOR_SIZE 33
# endif
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_X86_64
# elif defined(__powerpc64__)
# define _LIBUNWIND_TARGET_PPC64 1
# define _LIBUNWIND_CONTEXT_SIZE 167
# define _LIBUNWIND_CURSOR_SIZE 179
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC64
# elif defined(__powerpc__)
# define _LIBUNWIND_TARGET_PPC 1
# define _LIBUNWIND_CONTEXT_SIZE 117
# define _LIBUNWIND_CURSOR_SIZE 124
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_PPC
# elif defined(__aarch64__)
# define _LIBUNWIND_TARGET_AARCH64 1
# define _LIBUNWIND_CONTEXT_SIZE 66
# if defined(__SEH__)
# define _LIBUNWIND_CURSOR_SIZE 164
# else
# define _LIBUNWIND_CURSOR_SIZE 78
# endif
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_ARM64
# elif defined(__arm__)
# define _LIBUNWIND_TARGET_ARM 1
# if defined(__SEH__)
# define _LIBUNWIND_CONTEXT_SIZE 42
# define _LIBUNWIND_CURSOR_SIZE 80
# elif defined(__ARM_WMMX)
# define _LIBUNWIND_CONTEXT_SIZE 61
# define _LIBUNWIND_CURSOR_SIZE 68
# else
# define _LIBUNWIND_CONTEXT_SIZE 42
# define _LIBUNWIND_CURSOR_SIZE 49
# endif
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_ARM
# elif defined(__or1k__)
# define _LIBUNWIND_TARGET_OR1K 1
# define _LIBUNWIND_CONTEXT_SIZE 16
# define _LIBUNWIND_CURSOR_SIZE 24
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_OR1K
# elif defined(__hexagon__)
# define _LIBUNWIND_TARGET_HEXAGON 1
// Values here change when : Registers.hpp - hexagon_thread_state_t change
# define _LIBUNWIND_CONTEXT_SIZE 18
# define _LIBUNWIND_CURSOR_SIZE 24
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_HEXAGON
# elif defined(__mips__)
# if defined(_ABIO32) && _MIPS_SIM == _ABIO32
# define _LIBUNWIND_TARGET_MIPS_O32 1
# if defined(__mips_hard_float)
# define _LIBUNWIND_CONTEXT_SIZE 50
# define _LIBUNWIND_CURSOR_SIZE 57
# else
# define _LIBUNWIND_CONTEXT_SIZE 18
# define _LIBUNWIND_CURSOR_SIZE 24
# endif
# elif defined(_ABIN32) && _MIPS_SIM == _ABIN32
# define _LIBUNWIND_TARGET_MIPS_NEWABI 1
# if defined(__mips_hard_float)
# define _LIBUNWIND_CONTEXT_SIZE 67
# define _LIBUNWIND_CURSOR_SIZE 74
# else
# define _LIBUNWIND_CONTEXT_SIZE 35
# define _LIBUNWIND_CURSOR_SIZE 42
# endif
# elif defined(_ABI64) && _MIPS_SIM == _ABI64
# define _LIBUNWIND_TARGET_MIPS_NEWABI 1
# if defined(__mips_hard_float)
# define _LIBUNWIND_CONTEXT_SIZE 67
# define _LIBUNWIND_CURSOR_SIZE 79
# else
# define _LIBUNWIND_CONTEXT_SIZE 35
# define _LIBUNWIND_CURSOR_SIZE 47
# endif
# else
# error "Unsupported MIPS ABI and/or environment"
# endif
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_MIPS
#elif defined(__sparc__) && defined(__arch64__)
#define _LIBUNWIND_TARGET_SPARC64 1
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER \
_LIBUNWIND_HIGHEST_DWARF_REGISTER_SPARC64
#define _LIBUNWIND_CONTEXT_SIZE 33
#define _LIBUNWIND_CURSOR_SIZE 45
# elif defined(__sparc__)
#define _LIBUNWIND_TARGET_SPARC 1
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_SPARC
#define _LIBUNWIND_CONTEXT_SIZE 16
#define _LIBUNWIND_CURSOR_SIZE 23
# elif defined(__riscv)
# define _LIBUNWIND_TARGET_RISCV 1
# if defined(__riscv_flen)
# define RISCV_FLEN __riscv_flen
# else
# define RISCV_FLEN 0
# endif
# define _LIBUNWIND_CONTEXT_SIZE (32 * (__riscv_xlen + RISCV_FLEN) / 64)
# if __riscv_xlen == 32
# define _LIBUNWIND_CURSOR_SIZE (_LIBUNWIND_CONTEXT_SIZE + 7)
# elif __riscv_xlen == 64
# define _LIBUNWIND_CURSOR_SIZE (_LIBUNWIND_CONTEXT_SIZE + 12)
# else
# error "Unsupported RISC-V ABI"
# endif
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_RISCV
# elif defined(__ve__)
# define _LIBUNWIND_TARGET_VE 1
# define _LIBUNWIND_CONTEXT_SIZE 67
# define _LIBUNWIND_CURSOR_SIZE 79
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_VE
# elif defined(__s390x__)
# define _LIBUNWIND_TARGET_S390X 1
# define _LIBUNWIND_CONTEXT_SIZE 34
# define _LIBUNWIND_CURSOR_SIZE 46
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER _LIBUNWIND_HIGHEST_DWARF_REGISTER_S390X
#elif defined(__loongarch__)
#define _LIBUNWIND_TARGET_LOONGARCH 1
#if __loongarch_grlen == 64
#define _LIBUNWIND_CONTEXT_SIZE 65
#define _LIBUNWIND_CURSOR_SIZE 77
#else
#error "Unsupported LoongArch ABI"
#endif
#define _LIBUNWIND_HIGHEST_DWARF_REGISTER \
_LIBUNWIND_HIGHEST_DWARF_REGISTER_LOONGARCH
# else
# error "Unsupported architecture."
# endif
#else // !_LIBUNWIND_IS_NATIVE_ONLY
# define _LIBUNWIND_TARGET_I386
# define _LIBUNWIND_TARGET_X86_64 1
# define _LIBUNWIND_TARGET_PPC 1
# define _LIBUNWIND_TARGET_PPC64 1
# define _LIBUNWIND_TARGET_AARCH64 1
# define _LIBUNWIND_TARGET_ARM 1
# define _LIBUNWIND_TARGET_OR1K 1
# define _LIBUNWIND_TARGET_MIPS_O32 1
# define _LIBUNWIND_TARGET_MIPS_NEWABI 1
# define _LIBUNWIND_TARGET_SPARC 1
# define _LIBUNWIND_TARGET_SPARC64 1
# define _LIBUNWIND_TARGET_HEXAGON 1
# define _LIBUNWIND_TARGET_RISCV 1
# define _LIBUNWIND_TARGET_VE 1
# define _LIBUNWIND_TARGET_S390X 1
#define _LIBUNWIND_TARGET_LOONGARCH 1
# define _LIBUNWIND_CONTEXT_SIZE 167
# define _LIBUNWIND_CURSOR_SIZE 204
# define _LIBUNWIND_HIGHEST_DWARF_REGISTER 287
#endif // _LIBUNWIND_IS_NATIVE_ONLY
#endif // ____LIBUNWIND_CONFIG_H__

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//===----------------------------------------------------------------------===//
//
// 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
//
//
// Darwin's alternative to DWARF based unwind encodings.
//
//===----------------------------------------------------------------------===//
#ifndef __COMPACT_UNWIND_ENCODING__
#define __COMPACT_UNWIND_ENCODING__
#include "libc/isystem/stdint.h"
//
// Compilers can emit standard DWARF FDEs in the __TEXT,__eh_frame section
// of object files. Or compilers can emit compact unwind information in
// the __LD,__compact_unwind section.
//
// When the linker creates a final linked image, it will create a
// __TEXT,__unwind_info section. This section is a small and fast way for the
// runtime to access unwind info for any given function. If the compiler
// emitted compact unwind info for the function, that compact unwind info will
// be encoded in the __TEXT,__unwind_info section. If the compiler emitted
// DWARF unwind info, the __TEXT,__unwind_info section will contain the offset
// of the FDE in the __TEXT,__eh_frame section in the final linked image.
//
// Note: Previously, the linker would transform some DWARF unwind infos into
// compact unwind info. But that is fragile and no longer done.
//
// The compact unwind encoding is a 32-bit value which encoded in an
// architecture specific way, which registers to restore from where, and how
// to unwind out of the function.
//
typedef uint32_t compact_unwind_encoding_t;
// architecture independent bits
enum {
UNWIND_IS_NOT_FUNCTION_START = 0x80000000,
UNWIND_HAS_LSDA = 0x40000000,
UNWIND_PERSONALITY_MASK = 0x30000000,
};
//
// x86
//
// 1-bit: start
// 1-bit: has lsda
// 2-bit: personality index
//
// 4-bits: 0=old, 1=ebp based, 2=stack-imm, 3=stack-ind, 4=DWARF
// ebp based:
// 15-bits (5*3-bits per reg) register permutation
// 8-bits for stack offset
// frameless:
// 8-bits stack size
// 3-bits stack adjust
// 3-bits register count
// 10-bits register permutation
//
enum {
UNWIND_X86_MODE_MASK = 0x0F000000,
UNWIND_X86_MODE_EBP_FRAME = 0x01000000,
UNWIND_X86_MODE_STACK_IMMD = 0x02000000,
UNWIND_X86_MODE_STACK_IND = 0x03000000,
UNWIND_X86_MODE_DWARF = 0x04000000,
UNWIND_X86_EBP_FRAME_REGISTERS = 0x00007FFF,
UNWIND_X86_EBP_FRAME_OFFSET = 0x00FF0000,
UNWIND_X86_FRAMELESS_STACK_SIZE = 0x00FF0000,
UNWIND_X86_FRAMELESS_STACK_ADJUST = 0x0000E000,
UNWIND_X86_FRAMELESS_STACK_REG_COUNT = 0x00001C00,
UNWIND_X86_FRAMELESS_STACK_REG_PERMUTATION = 0x000003FF,
UNWIND_X86_DWARF_SECTION_OFFSET = 0x00FFFFFF,
};
enum {
UNWIND_X86_REG_NONE = 0,
UNWIND_X86_REG_EBX = 1,
UNWIND_X86_REG_ECX = 2,
UNWIND_X86_REG_EDX = 3,
UNWIND_X86_REG_EDI = 4,
UNWIND_X86_REG_ESI = 5,
UNWIND_X86_REG_EBP = 6,
};
//
// For x86 there are four modes for the compact unwind encoding:
// UNWIND_X86_MODE_EBP_FRAME:
// EBP based frame where EBP is push on stack immediately after return address,
// then ESP is moved to EBP. Thus, to unwind ESP is restored with the current
// EPB value, then EBP is restored by popping off the stack, and the return
// is done by popping the stack once more into the pc.
// All non-volatile registers that need to be restored must have been saved
// in a small range in the stack that starts EBP-4 to EBP-1020. The offset/4
// is encoded in the UNWIND_X86_EBP_FRAME_OFFSET bits. The registers saved
// are encoded in the UNWIND_X86_EBP_FRAME_REGISTERS bits as five 3-bit entries.
// Each entry contains which register to restore.
// UNWIND_X86_MODE_STACK_IMMD:
// A "frameless" (EBP not used as frame pointer) function with a small
// constant stack size. To return, a constant (encoded in the compact
// unwind encoding) is added to the ESP. Then the return is done by
// popping the stack into the pc.
// All non-volatile registers that need to be restored must have been saved
// on the stack immediately after the return address. The stack_size/4 is
// encoded in the UNWIND_X86_FRAMELESS_STACK_SIZE (max stack size is 1024).
// The number of registers saved is encoded in UNWIND_X86_FRAMELESS_STACK_REG_COUNT.
// UNWIND_X86_FRAMELESS_STACK_REG_PERMUTATION contains which registers were
// saved and their order.
// UNWIND_X86_MODE_STACK_IND:
// A "frameless" (EBP not used as frame pointer) function large constant
// stack size. This case is like the previous, except the stack size is too
// large to encode in the compact unwind encoding. Instead it requires that
// the function contains "subl $nnnnnnnn,ESP" in its prolog. The compact
// encoding contains the offset to the nnnnnnnn value in the function in
// UNWIND_X86_FRAMELESS_STACK_SIZE.
// UNWIND_X86_MODE_DWARF:
// No compact unwind encoding is available. Instead the low 24-bits of the
// compact encoding is the offset of the DWARF FDE in the __eh_frame section.
// This mode is never used in object files. It is only generated by the
// linker in final linked images which have only DWARF unwind info for a
// function.
//
// The permutation encoding is a Lehmer code sequence encoded into a
// single variable-base number so we can encode the ordering of up to
// six registers in a 10-bit space.
//
// The following is the algorithm used to create the permutation encoding used
// with frameless stacks. It is passed the number of registers to be saved and
// an array of the register numbers saved.
//
//uint32_t permute_encode(uint32_t registerCount, const uint32_t registers[6])
//{
// uint32_t renumregs[6];
// for (int i=6-registerCount; i < 6; ++i) {
// int countless = 0;
// for (int j=6-registerCount; j < i; ++j) {
// if ( registers[j] < registers[i] )
// ++countless;
// }
// renumregs[i] = registers[i] - countless -1;
// }
// uint32_t permutationEncoding = 0;
// switch ( registerCount ) {
// case 6:
// permutationEncoding |= (120*renumregs[0] + 24*renumregs[1]
// + 6*renumregs[2] + 2*renumregs[3]
// + renumregs[4]);
// break;
// case 5:
// permutationEncoding |= (120*renumregs[1] + 24*renumregs[2]
// + 6*renumregs[3] + 2*renumregs[4]
// + renumregs[5]);
// break;
// case 4:
// permutationEncoding |= (60*renumregs[2] + 12*renumregs[3]
// + 3*renumregs[4] + renumregs[5]);
// break;
// case 3:
// permutationEncoding |= (20*renumregs[3] + 4*renumregs[4]
// + renumregs[5]);
// break;
// case 2:
// permutationEncoding |= (5*renumregs[4] + renumregs[5]);
// break;
// case 1:
// permutationEncoding |= (renumregs[5]);
// break;
// }
// return permutationEncoding;
//}
//
//
// x86_64
//
// 1-bit: start
// 1-bit: has lsda
// 2-bit: personality index
//
// 4-bits: 0=old, 1=rbp based, 2=stack-imm, 3=stack-ind, 4=DWARF
// rbp based:
// 15-bits (5*3-bits per reg) register permutation
// 8-bits for stack offset
// frameless:
// 8-bits stack size
// 3-bits stack adjust
// 3-bits register count
// 10-bits register permutation
//
enum {
UNWIND_X86_64_MODE_MASK = 0x0F000000,
UNWIND_X86_64_MODE_RBP_FRAME = 0x01000000,
UNWIND_X86_64_MODE_STACK_IMMD = 0x02000000,
UNWIND_X86_64_MODE_STACK_IND = 0x03000000,
UNWIND_X86_64_MODE_DWARF = 0x04000000,
UNWIND_X86_64_RBP_FRAME_REGISTERS = 0x00007FFF,
UNWIND_X86_64_RBP_FRAME_OFFSET = 0x00FF0000,
UNWIND_X86_64_FRAMELESS_STACK_SIZE = 0x00FF0000,
UNWIND_X86_64_FRAMELESS_STACK_ADJUST = 0x0000E000,
UNWIND_X86_64_FRAMELESS_STACK_REG_COUNT = 0x00001C00,
UNWIND_X86_64_FRAMELESS_STACK_REG_PERMUTATION = 0x000003FF,
UNWIND_X86_64_DWARF_SECTION_OFFSET = 0x00FFFFFF,
};
enum {
UNWIND_X86_64_REG_NONE = 0,
UNWIND_X86_64_REG_RBX = 1,
UNWIND_X86_64_REG_R12 = 2,
UNWIND_X86_64_REG_R13 = 3,
UNWIND_X86_64_REG_R14 = 4,
UNWIND_X86_64_REG_R15 = 5,
UNWIND_X86_64_REG_RBP = 6,
};
//
// For x86_64 there are four modes for the compact unwind encoding:
// UNWIND_X86_64_MODE_RBP_FRAME:
// RBP based frame where RBP is push on stack immediately after return address,
// then RSP is moved to RBP. Thus, to unwind RSP is restored with the current
// EPB value, then RBP is restored by popping off the stack, and the return
// is done by popping the stack once more into the pc.
// All non-volatile registers that need to be restored must have been saved
// in a small range in the stack that starts RBP-8 to RBP-2040. The offset/8
// is encoded in the UNWIND_X86_64_RBP_FRAME_OFFSET bits. The registers saved
// are encoded in the UNWIND_X86_64_RBP_FRAME_REGISTERS bits as five 3-bit entries.
// Each entry contains which register to restore.
// UNWIND_X86_64_MODE_STACK_IMMD:
// A "frameless" (RBP not used as frame pointer) function with a small
// constant stack size. To return, a constant (encoded in the compact
// unwind encoding) is added to the RSP. Then the return is done by
// popping the stack into the pc.
// All non-volatile registers that need to be restored must have been saved
// on the stack immediately after the return address. The stack_size/8 is
// encoded in the UNWIND_X86_64_FRAMELESS_STACK_SIZE (max stack size is 2048).
// The number of registers saved is encoded in UNWIND_X86_64_FRAMELESS_STACK_REG_COUNT.
// UNWIND_X86_64_FRAMELESS_STACK_REG_PERMUTATION contains which registers were
// saved and their order.
// UNWIND_X86_64_MODE_STACK_IND:
// A "frameless" (RBP not used as frame pointer) function large constant
// stack size. This case is like the previous, except the stack size is too
// large to encode in the compact unwind encoding. Instead it requires that
// the function contains "subq $nnnnnnnn,RSP" in its prolog. The compact
// encoding contains the offset to the nnnnnnnn value in the function in
// UNWIND_X86_64_FRAMELESS_STACK_SIZE.
// UNWIND_X86_64_MODE_DWARF:
// No compact unwind encoding is available. Instead the low 24-bits of the
// compact encoding is the offset of the DWARF FDE in the __eh_frame section.
// This mode is never used in object files. It is only generated by the
// linker in final linked images which have only DWARF unwind info for a
// function.
//
// ARM64
//
// 1-bit: start
// 1-bit: has lsda
// 2-bit: personality index
//
// 4-bits: 4=frame-based, 3=DWARF, 2=frameless
// frameless:
// 12-bits of stack size
// frame-based:
// 4-bits D reg pairs saved
// 5-bits X reg pairs saved
// DWARF:
// 24-bits offset of DWARF FDE in __eh_frame section
//
enum {
UNWIND_ARM64_MODE_MASK = 0x0F000000,
UNWIND_ARM64_MODE_FRAMELESS = 0x02000000,
UNWIND_ARM64_MODE_DWARF = 0x03000000,
UNWIND_ARM64_MODE_FRAME = 0x04000000,
UNWIND_ARM64_FRAME_X19_X20_PAIR = 0x00000001,
UNWIND_ARM64_FRAME_X21_X22_PAIR = 0x00000002,
UNWIND_ARM64_FRAME_X23_X24_PAIR = 0x00000004,
UNWIND_ARM64_FRAME_X25_X26_PAIR = 0x00000008,
UNWIND_ARM64_FRAME_X27_X28_PAIR = 0x00000010,
UNWIND_ARM64_FRAME_D8_D9_PAIR = 0x00000100,
UNWIND_ARM64_FRAME_D10_D11_PAIR = 0x00000200,
UNWIND_ARM64_FRAME_D12_D13_PAIR = 0x00000400,
UNWIND_ARM64_FRAME_D14_D15_PAIR = 0x00000800,
UNWIND_ARM64_FRAMELESS_STACK_SIZE_MASK = 0x00FFF000,
UNWIND_ARM64_DWARF_SECTION_OFFSET = 0x00FFFFFF,
};
// For arm64 there are three modes for the compact unwind encoding:
// UNWIND_ARM64_MODE_FRAME:
// This is a standard arm64 prolog where FP/LR are immediately pushed on the
// stack, then SP is copied to FP. If there are any non-volatile registers
// saved, then are copied into the stack frame in pairs in a contiguous
// range right below the saved FP/LR pair. Any subset of the five X pairs
// and four D pairs can be saved, but the memory layout must be in register
// number order.
// UNWIND_ARM64_MODE_FRAMELESS:
// A "frameless" leaf function, where FP/LR are not saved. The return address
// remains in LR throughout the function. If any non-volatile registers
// are saved, they must be pushed onto the stack before any stack space is
// allocated for local variables. The stack sized (including any saved
// non-volatile registers) divided by 16 is encoded in the bits
// UNWIND_ARM64_FRAMELESS_STACK_SIZE_MASK.
// UNWIND_ARM64_MODE_DWARF:
// No compact unwind encoding is available. Instead the low 24-bits of the
// compact encoding is the offset of the DWARF FDE in the __eh_frame section.
// This mode is never used in object files. It is only generated by the
// linker in final linked images which have only DWARF unwind info for a
// function.
//
////////////////////////////////////////////////////////////////////////////////
//
// Relocatable Object Files: __LD,__compact_unwind
//
////////////////////////////////////////////////////////////////////////////////
//
// A compiler can generated compact unwind information for a function by adding
// a "row" to the __LD,__compact_unwind section. This section has the
// S_ATTR_DEBUG bit set, so the section will be ignored by older linkers.
// It is removed by the new linker, so never ends up in final executables.
// This section is a table, initially with one row per function (that needs
// unwind info). The table columns and some conceptual entries are:
//
// range-start pointer to start of function/range
// range-length
// compact-unwind-encoding 32-bit encoding
// personality-function or zero if no personality function
// lsda or zero if no LSDA data
//
// The length and encoding fields are 32-bits. The other are all pointer sized.
//
// In x86_64 assembly, these entry would look like:
//
// .section __LD,__compact_unwind,regular,debug
//
// #compact unwind for _foo
// .quad _foo
// .set L1,LfooEnd-_foo
// .long L1
// .long 0x01010001
// .quad 0
// .quad 0
//
// #compact unwind for _bar
// .quad _bar
// .set L2,LbarEnd-_bar
// .long L2
// .long 0x01020011
// .quad __gxx_personality
// .quad except_tab1
//
//
// Notes: There is no need for any labels in the the __compact_unwind section.
// The use of the .set directive is to force the evaluation of the
// range-length at assembly time, instead of generating relocations.
//
// To support future compiler optimizations where which non-volatile registers
// are saved changes within a function (e.g. delay saving non-volatiles until
// necessary), there can by multiple lines in the __compact_unwind table for one
// function, each with a different (non-overlapping) range and each with
// different compact unwind encodings that correspond to the non-volatiles
// saved at that range of the function.
//
// If a particular function is so wacky that there is no compact unwind way
// to encode it, then the compiler can emit traditional DWARF unwind info.
// The runtime will use which ever is available.
//
// Runtime support for compact unwind encodings are only available on 10.6
// and later. So, the compiler should not generate it when targeting pre-10.6.
////////////////////////////////////////////////////////////////////////////////
//
// Final Linked Images: __TEXT,__unwind_info
//
////////////////////////////////////////////////////////////////////////////////
//
// The __TEXT,__unwind_info section is laid out for an efficient two level lookup.
// The header of the section contains a coarse index that maps function address
// to the page (4096 byte block) containing the unwind info for that function.
//
#define UNWIND_SECTION_VERSION 1
struct unwind_info_section_header
{
uint32_t version; // UNWIND_SECTION_VERSION
uint32_t commonEncodingsArraySectionOffset;
uint32_t commonEncodingsArrayCount;
uint32_t personalityArraySectionOffset;
uint32_t personalityArrayCount;
uint32_t indexSectionOffset;
uint32_t indexCount;
// compact_unwind_encoding_t[]
// uint32_t personalities[]
// unwind_info_section_header_index_entry[]
// unwind_info_section_header_lsda_index_entry[]
};
struct unwind_info_section_header_index_entry
{
uint32_t functionOffset;
uint32_t secondLevelPagesSectionOffset; // section offset to start of regular or compress page
uint32_t lsdaIndexArraySectionOffset; // section offset to start of lsda_index array for this range
};
struct unwind_info_section_header_lsda_index_entry
{
uint32_t functionOffset;
uint32_t lsdaOffset;
};
//
// There are two kinds of second level index pages: regular and compressed.
// A compressed page can hold up to 1021 entries, but it cannot be used
// if too many different encoding types are used. The regular page holds
// 511 entries.
//
struct unwind_info_regular_second_level_entry
{
uint32_t functionOffset;
compact_unwind_encoding_t encoding;
};
#define UNWIND_SECOND_LEVEL_REGULAR 2
struct unwind_info_regular_second_level_page_header
{
uint32_t kind; // UNWIND_SECOND_LEVEL_REGULAR
uint16_t entryPageOffset;
uint16_t entryCount;
// entry array
};
#define UNWIND_SECOND_LEVEL_COMPRESSED 3
struct unwind_info_compressed_second_level_page_header
{
uint32_t kind; // UNWIND_SECOND_LEVEL_COMPRESSED
uint16_t entryPageOffset;
uint16_t entryCount;
uint16_t encodingsPageOffset;
uint16_t encodingsCount;
// 32-bit entry array
// encodings array
};
#define UNWIND_INFO_COMPRESSED_ENTRY_FUNC_OFFSET(entry) (entry & 0x00FFFFFF)
#define UNWIND_INFO_COMPRESSED_ENTRY_ENCODING_INDEX(entry) ((entry >> 24) & 0xFF)
#endif

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//===----------------------------------------------------------------------===//
//
// 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
//
//
// C++ ABI Level 1 ABI documented at:
// https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html
//
//===----------------------------------------------------------------------===//
#ifndef __UNWIND_H__
#define __UNWIND_H__
#include "third_party/libunwind/include/__libunwind_config.h"
#include "libc/isystem/stdint.h"
#include "libc/isystem/stddef.h"
#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__) && defined(_WIN32)
#include <windows.h>
#include <ntverp.h>
#endif
#if defined(__APPLE__)
#define LIBUNWIND_UNAVAIL __attribute__ (( unavailable ))
#else
#define LIBUNWIND_UNAVAIL
#endif
typedef enum {
_URC_NO_REASON = 0,
_URC_OK = 0,
_URC_FOREIGN_EXCEPTION_CAUGHT = 1,
_URC_FATAL_PHASE2_ERROR = 2,
_URC_FATAL_PHASE1_ERROR = 3,
_URC_NORMAL_STOP = 4,
_URC_END_OF_STACK = 5,
_URC_HANDLER_FOUND = 6,
_URC_INSTALL_CONTEXT = 7,
_URC_CONTINUE_UNWIND = 8,
#if defined(_LIBUNWIND_ARM_EHABI)
_URC_FAILURE = 9
#endif
} _Unwind_Reason_Code;
typedef enum {
_UA_SEARCH_PHASE = 1,
_UA_CLEANUP_PHASE = 2,
_UA_HANDLER_FRAME = 4,
_UA_FORCE_UNWIND = 8,
_UA_END_OF_STACK = 16 // gcc extension to C++ ABI
} _Unwind_Action;
typedef struct _Unwind_Context _Unwind_Context; // opaque
#if defined(_LIBUNWIND_ARM_EHABI)
#include "third_party/libunwind/include/unwind_arm_ehabi.h"
#else
#include "third_party/libunwind/include/unwind_itanium.h"
#endif
typedef _Unwind_Reason_Code (*_Unwind_Stop_Fn)
(int version,
_Unwind_Action actions,
_Unwind_Exception_Class exceptionClass,
_Unwind_Exception* exceptionObject,
struct _Unwind_Context* context,
void* stop_parameter);
#ifdef __cplusplus
extern "C" {
#endif
extern uintptr_t _Unwind_GetRegionStart(struct _Unwind_Context *context);
extern uintptr_t
_Unwind_GetLanguageSpecificData(struct _Unwind_Context *context);
#ifdef __USING_SJLJ_EXCEPTIONS__
extern _Unwind_Reason_Code
_Unwind_SjLj_ForcedUnwind(_Unwind_Exception *exception_object,
_Unwind_Stop_Fn stop, void *stop_parameter);
#else
extern _Unwind_Reason_Code
_Unwind_ForcedUnwind(_Unwind_Exception *exception_object,
_Unwind_Stop_Fn stop, void *stop_parameter);
#endif
#ifdef __USING_SJLJ_EXCEPTIONS__
typedef struct _Unwind_FunctionContext *_Unwind_FunctionContext_t;
extern void _Unwind_SjLj_Register(_Unwind_FunctionContext_t fc);
extern void _Unwind_SjLj_Unregister(_Unwind_FunctionContext_t fc);
#endif
//
// The following are semi-supported extensions to the C++ ABI
//
//
// called by __cxa_rethrow().
//
#ifdef __USING_SJLJ_EXCEPTIONS__
extern _Unwind_Reason_Code
_Unwind_SjLj_Resume_or_Rethrow(_Unwind_Exception *exception_object);
#else
extern _Unwind_Reason_Code
_Unwind_Resume_or_Rethrow(_Unwind_Exception *exception_object);
#endif
// _Unwind_Backtrace() is a gcc extension that walks the stack and calls the
// _Unwind_Trace_Fn once per frame until it reaches the bottom of the stack
// or the _Unwind_Trace_Fn function returns something other than _URC_NO_REASON.
typedef _Unwind_Reason_Code (*_Unwind_Trace_Fn)(struct _Unwind_Context *,
void *);
extern _Unwind_Reason_Code _Unwind_Backtrace(_Unwind_Trace_Fn, void *);
// _Unwind_GetCFA is a gcc extension that can be called from within a
// personality handler to get the CFA (stack pointer before call) of
// current frame.
extern uintptr_t _Unwind_GetCFA(struct _Unwind_Context *);
// _Unwind_GetIPInfo is a gcc extension that can be called from within a
// personality handler. Similar to _Unwind_GetIP() but also returns in
// *ipBefore a non-zero value if the instruction pointer is at or before the
// instruction causing the unwind. Normally, in a function call, the IP returned
// is the return address which is after the call instruction and may be past the
// end of the function containing the call instruction.
extern uintptr_t _Unwind_GetIPInfo(struct _Unwind_Context *context,
int *ipBefore);
// __register_frame() is used with dynamically generated code to register the
// FDE for a generated (JIT) code. The FDE must use pc-rel addressing to point
// to its function and optional LSDA.
// __register_frame() has existed in all versions of Mac OS X, but in 10.4 and
// 10.5 it was buggy and did not actually register the FDE with the unwinder.
// In 10.6 and later it does register properly.
extern void __register_frame(const void *fde);
extern void __deregister_frame(const void *fde);
// _Unwind_Find_FDE() will locate the FDE if the pc is in some function that has
// an associated FDE. Note, Mac OS X 10.6 and later, introduces "compact unwind
// info" which the runtime uses in preference to DWARF unwind info. This
// function will only work if the target function has an FDE but no compact
// unwind info.
struct dwarf_eh_bases {
uintptr_t tbase;
uintptr_t dbase;
uintptr_t func;
};
extern const void *_Unwind_Find_FDE(const void *pc, struct dwarf_eh_bases *);
// This function attempts to find the start (address of first instruction) of
// a function given an address inside the function. It only works if the
// function has an FDE (DWARF unwind info).
// This function is unimplemented on Mac OS X 10.6 and later. Instead, use
// _Unwind_Find_FDE() and look at the dwarf_eh_bases.func result.
extern void *_Unwind_FindEnclosingFunction(void *pc);
// Mac OS X does not support text-rel and data-rel addressing so these functions
// are unimplemented.
extern uintptr_t _Unwind_GetDataRelBase(struct _Unwind_Context *context)
LIBUNWIND_UNAVAIL;
extern uintptr_t _Unwind_GetTextRelBase(struct _Unwind_Context *context)
LIBUNWIND_UNAVAIL;
// Mac OS X 10.4 and 10.5 had implementations of these functions in
// libgcc_s.dylib, but they never worked.
/// These functions are no longer available on Mac OS X.
extern void __register_frame_info_bases(const void *fde, void *ob, void *tb,
void *db) LIBUNWIND_UNAVAIL;
extern void __register_frame_info(const void *fde, void *ob)
LIBUNWIND_UNAVAIL;
extern void __register_frame_info_table_bases(const void *fde, void *ob,
void *tb, void *db)
LIBUNWIND_UNAVAIL;
extern void __register_frame_info_table(const void *fde, void *ob)
LIBUNWIND_UNAVAIL;
extern void __register_frame_table(const void *fde)
LIBUNWIND_UNAVAIL;
extern void *__deregister_frame_info(const void *fde)
LIBUNWIND_UNAVAIL;
extern void *__deregister_frame_info_bases(const void *fde)
LIBUNWIND_UNAVAIL;
#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__)
#ifndef _WIN32
typedef struct _EXCEPTION_RECORD EXCEPTION_RECORD;
typedef struct _CONTEXT CONTEXT;
typedef struct _DISPATCHER_CONTEXT DISPATCHER_CONTEXT;
#elif !defined(__MINGW32__) && VER_PRODUCTBUILD < 8000
typedef struct _DISPATCHER_CONTEXT DISPATCHER_CONTEXT;
#endif
// This is the common wrapper for GCC-style personality functions with SEH.
extern EXCEPTION_DISPOSITION _GCC_specific_handler(EXCEPTION_RECORD *exc,
void *frame, CONTEXT *ctx,
DISPATCHER_CONTEXT *disp,
_Unwind_Personality_Fn pers);
#endif
#ifdef __cplusplus
}
#endif
#endif // __UNWIND_H__

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//===----------------------------------------------------------------------===//
//
// 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
//
//
// C++ ABI Level 1 ABI documented at:
// https://github.com/ARM-software/abi-aa/blob/main/ehabi32/ehabi32.rst
//
//===----------------------------------------------------------------------===//
#ifndef __ARM_EHABI_UNWIND_H__
#define __ARM_EHABI_UNWIND_H__
typedef uint32_t _Unwind_State;
static const _Unwind_State _US_VIRTUAL_UNWIND_FRAME = 0;
static const _Unwind_State _US_UNWIND_FRAME_STARTING = 1;
static const _Unwind_State _US_UNWIND_FRAME_RESUME = 2;
static const _Unwind_State _US_ACTION_MASK = 3;
/* Undocumented flag for force unwinding. */
static const _Unwind_State _US_FORCE_UNWIND = 8;
typedef uint32_t _Unwind_EHT_Header;
struct _Unwind_Control_Block;
typedef struct _Unwind_Control_Block _Unwind_Control_Block;
#define _Unwind_Exception _Unwind_Control_Block /* Alias */
typedef uint8_t _Unwind_Exception_Class[8];
struct _Unwind_Control_Block {
_Unwind_Exception_Class exception_class;
void (*exception_cleanup)(_Unwind_Reason_Code, _Unwind_Control_Block*);
/* Unwinder cache, private fields for the unwinder's use */
struct {
uint32_t reserved1; /* init reserved1 to 0, then don't touch */
uint32_t reserved2;
uint32_t reserved3;
uint32_t reserved4;
uint32_t reserved5;
} unwinder_cache;
/* Propagation barrier cache (valid after phase 1): */
struct {
uint32_t sp;
uint32_t bitpattern[5];
} barrier_cache;
/* Cleanup cache (preserved over cleanup): */
struct {
uint32_t bitpattern[4];
} cleanup_cache;
/* Pr cache (for pr's benefit): */
struct {
uint32_t fnstart; /* function start address */
_Unwind_EHT_Header* ehtp; /* pointer to EHT entry header word */
uint32_t additional;
uint32_t reserved1;
} pr_cache;
long long int :0; /* Enforce the 8-byte alignment */
} __attribute__((__aligned__(8)));
typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)(
_Unwind_State state, _Unwind_Exception *exceptionObject,
struct _Unwind_Context *context);
#ifdef __cplusplus
extern "C" {
#endif
//
// The following are the base functions documented by the C++ ABI
//
#ifdef __USING_SJLJ_EXCEPTIONS__
extern _Unwind_Reason_Code
_Unwind_SjLj_RaiseException(_Unwind_Exception *exception_object);
extern void _Unwind_SjLj_Resume(_Unwind_Exception *exception_object);
#else
extern _Unwind_Reason_Code
_Unwind_RaiseException(_Unwind_Exception *exception_object);
extern void _Unwind_Resume(_Unwind_Exception *exception_object);
#endif
extern void _Unwind_DeleteException(_Unwind_Exception *exception_object);
typedef enum {
_UVRSC_CORE = 0, /* integer register */
_UVRSC_VFP = 1, /* vfp */
_UVRSC_WMMXD = 3, /* Intel WMMX data register */
_UVRSC_WMMXC = 4, /* Intel WMMX control register */
_UVRSC_PSEUDO = 5 /* Special purpose pseudo register */
} _Unwind_VRS_RegClass;
typedef enum {
_UVRSD_UINT32 = 0,
_UVRSD_VFPX = 1,
_UVRSD_UINT64 = 3,
_UVRSD_FLOAT = 4,
_UVRSD_DOUBLE = 5
} _Unwind_VRS_DataRepresentation;
typedef enum {
_UVRSR_OK = 0,
_UVRSR_NOT_IMPLEMENTED = 1,
_UVRSR_FAILED = 2
} _Unwind_VRS_Result;
extern void _Unwind_Complete(_Unwind_Exception* exception_object);
extern _Unwind_VRS_Result
_Unwind_VRS_Get(_Unwind_Context *context, _Unwind_VRS_RegClass regclass,
uint32_t regno, _Unwind_VRS_DataRepresentation representation,
void *valuep);
extern _Unwind_VRS_Result
_Unwind_VRS_Set(_Unwind_Context *context, _Unwind_VRS_RegClass regclass,
uint32_t regno, _Unwind_VRS_DataRepresentation representation,
void *valuep);
extern _Unwind_VRS_Result
_Unwind_VRS_Pop(_Unwind_Context *context, _Unwind_VRS_RegClass regclass,
uint32_t discriminator,
_Unwind_VRS_DataRepresentation representation);
#if defined(_LIBUNWIND_UNWIND_LEVEL1_EXTERNAL_LINKAGE)
#define _LIBUNWIND_EXPORT_UNWIND_LEVEL1 extern
#else
#define _LIBUNWIND_EXPORT_UNWIND_LEVEL1 static __inline__
#endif
// These are de facto helper functions for ARM, which delegate the function
// calls to _Unwind_VRS_Get/Set(). These are not a part of ARM EHABI
// specification, thus these function MUST be inlined. Please don't replace
// these with the "extern" function declaration; otherwise, the program
// including this <unwind.h> header won't be ABI compatible and will result in
// link error when we are linking the program with libgcc.
_LIBUNWIND_EXPORT_UNWIND_LEVEL1
uintptr_t _Unwind_GetGR(struct _Unwind_Context *context, int index) {
uintptr_t value = 0;
_Unwind_VRS_Get(context, _UVRSC_CORE, (uint32_t)index, _UVRSD_UINT32, &value);
return value;
}
_LIBUNWIND_EXPORT_UNWIND_LEVEL1
void _Unwind_SetGR(struct _Unwind_Context *context, int index,
uintptr_t value) {
_Unwind_VRS_Set(context, _UVRSC_CORE, (uint32_t)index, _UVRSD_UINT32, &value);
}
_LIBUNWIND_EXPORT_UNWIND_LEVEL1
uintptr_t _Unwind_GetIP(struct _Unwind_Context *context) {
// remove the thumb-bit before returning
return _Unwind_GetGR(context, 15) & (~(uintptr_t)0x1);
}
_LIBUNWIND_EXPORT_UNWIND_LEVEL1
void _Unwind_SetIP(struct _Unwind_Context *context, uintptr_t value) {
uintptr_t thumb_bit = _Unwind_GetGR(context, 15) & ((uintptr_t)0x1);
_Unwind_SetGR(context, 15, value | thumb_bit);
}
#ifdef __cplusplus
}
#endif
#endif // __ARM_EHABI_UNWIND_H__

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//===----------------------------------------------------------------------===//
//
// 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
//
//
// C++ ABI Level 1 ABI documented at:
// https://itanium-cxx-abi.github.io/cxx-abi/abi-eh.html
//
//===----------------------------------------------------------------------===//
#ifndef __ITANIUM_UNWIND_H__
#define __ITANIUM_UNWIND_H__
struct _Unwind_Context; // opaque
struct _Unwind_Exception; // forward declaration
typedef struct _Unwind_Exception _Unwind_Exception;
typedef uint64_t _Unwind_Exception_Class;
struct _Unwind_Exception {
_Unwind_Exception_Class exception_class;
void (*exception_cleanup)(_Unwind_Reason_Code reason,
_Unwind_Exception *exc);
#if defined(__SEH__) && !defined(__USING_SJLJ_EXCEPTIONS__)
uintptr_t private_[6];
#else
uintptr_t private_1; // non-zero means forced unwind
uintptr_t private_2; // holds sp that phase1 found for phase2 to use
#endif
#if __SIZEOF_POINTER__ == 4
// The implementation of _Unwind_Exception uses an attribute mode on the
// above fields which has the side effect of causing this whole struct to
// round up to 32 bytes in size (48 with SEH). To be more explicit, we add
// pad fields added for binary compatibility.
uint32_t reserved[3];
#endif
// The Itanium ABI requires that _Unwind_Exception objects are "double-word
// aligned". GCC has interpreted this to mean "use the maximum useful
// alignment for the target"; so do we.
} __attribute__((__aligned__));
typedef _Unwind_Reason_Code (*_Unwind_Personality_Fn)(
int version, _Unwind_Action actions, uint64_t exceptionClass,
_Unwind_Exception *exceptionObject, struct _Unwind_Context *context);
#ifdef __cplusplus
extern "C" {
#endif
//
// The following are the base functions documented by the C++ ABI
//
#ifdef __USING_SJLJ_EXCEPTIONS__
extern _Unwind_Reason_Code
_Unwind_SjLj_RaiseException(_Unwind_Exception *exception_object);
extern void _Unwind_SjLj_Resume(_Unwind_Exception *exception_object);
#else
extern _Unwind_Reason_Code
_Unwind_RaiseException(_Unwind_Exception *exception_object);
extern void _Unwind_Resume(_Unwind_Exception *exception_object);
#endif
extern void _Unwind_DeleteException(_Unwind_Exception *exception_object);
extern uintptr_t _Unwind_GetGR(struct _Unwind_Context *context, int index);
extern void _Unwind_SetGR(struct _Unwind_Context *context, int index,
uintptr_t new_value);
extern uintptr_t _Unwind_GetIP(struct _Unwind_Context *context);
extern void _Unwind_SetIP(struct _Unwind_Context *, uintptr_t new_value);
#ifdef __cplusplus
}
#endif
#endif // __ITANIUM_UNWIND_H__