diff options
author | Luke Cheeseman <luke.cheeseman@arm.com> | 2018-09-24 16:36:33 +0000 |
---|---|---|
committer | Luke Cheeseman <luke.cheeseman@arm.com> | 2018-09-24 16:36:33 +0000 |
commit | 61519f54d2df95b60443b2f94cfb4ed7b15a7217 (patch) | |
tree | 5fd38b8acf0183204c2cf8ef49ad25c4e7dc4a65 /libunwind | |
parent | ebd05dec47da2943f7dee85f04d86d014bc551ba (diff) |
Reverting r342895
- The used builtins do not compile for pre arm v8.3a targets with gcc
Diffstat (limited to 'libunwind')
-rw-r--r-- | libunwind/include/libunwind.h | 5 | ||||
-rw-r--r-- | libunwind/src/DwarfInstructions.hpp | 18 | ||||
-rw-r--r-- | libunwind/src/DwarfParser.hpp | 8 | ||||
-rw-r--r-- | libunwind/src/Registers.hpp | 9 | ||||
-rw-r--r-- | libunwind/src/dwarf2.h | 5 |
5 files changed, 2 insertions, 43 deletions
diff --git a/libunwind/include/libunwind.h b/libunwind/include/libunwind.h index d824c131835..97d2b82290c 100644 --- a/libunwind/include/libunwind.h +++ b/libunwind/include/libunwind.h @@ -57,9 +57,6 @@ enum { UNW_EINVAL = -6547, /* unsupported operation or bad value */ UNW_EBADVERSION = -6548, /* unwind info has unsupported version */ UNW_ENOINFO = -6549 /* no unwind info found */ -#if defined(_LIBUNWIND_TARGET_AARCH64) && !defined(_LIBUNWIND_IS_NATIVE_ONLY) - , UNW_ECROSSRASIGNING = -6550 /* cross unwind with return address signing */ -#endif }; struct unw_context_t { @@ -550,8 +547,6 @@ enum { UNW_ARM64_X31 = 31, UNW_ARM64_SP = 31, // reserved block - UNW_ARM64_RA_SIGN_STATE = 34, - // reserved block UNW_ARM64_D0 = 64, UNW_ARM64_D1 = 65, UNW_ARM64_D2 = 66, diff --git a/libunwind/src/DwarfInstructions.hpp b/libunwind/src/DwarfInstructions.hpp index 6ccd8607f5e..88e67198a37 100644 --- a/libunwind/src/DwarfInstructions.hpp +++ b/libunwind/src/DwarfInstructions.hpp @@ -198,24 +198,6 @@ int DwarfInstructions<A, R>::stepWithDwarf(A &addressSpace, pint_t pc, // restoring SP means setting it to CFA. newRegisters.setSP(cfa); -#if defined(_LIBUNWIND_TARGET_AARCH64) - // If the target is aarch64 then the return address may have been signed - // using the v8.3 pointer authentication extensions. The original - // return address needs to be authenticated before the return address is - // restored. autia1716 is used instead of autia as autia1716 assembles - // to a NOP on pre-v8.3a architectures. - if (prolog.savedRegisters[UNW_ARM64_RA_SIGN_STATE].value) { -#if !defined(_LIBUNWIND_IS_NATIVE_ONLY) - return UNW_ECROSSRASIGNING; -#else - register unsigned long long x17 __asm("x17") = returnAddress; - register unsigned long long x16 __asm("x16") = cfa; - asm("autia1716": "+r"(x17): "r"(x16)); - returnAddress = x17; -#endif - } -#endif - // Return address is address after call site instruction, so setting IP to // that does simualates a return. newRegisters.setIP(returnAddress); diff --git a/libunwind/src/DwarfParser.hpp b/libunwind/src/DwarfParser.hpp index 68506a35053..b749b7776e1 100644 --- a/libunwind/src/DwarfParser.hpp +++ b/libunwind/src/DwarfParser.hpp @@ -666,14 +666,6 @@ bool CFI_Parser<A>::parseInstructions(A &addressSpace, pint_t instructions, _LIBUNWIND_TRACE_DWARF( "DW_CFA_GNU_negative_offset_extended(%" PRId64 ")\n", offset); break; - -#if defined(_LIBUNWIND_TARGET_AARCH64) - case DW_CFA_AARCH64_negate_ra_state: - results->savedRegisters[UNW_ARM64_RA_SIGN_STATE].value ^= 0x1; - _LIBUNWIND_TRACE_DWARF("DW_CFA_AARCH64_negate_ra_state\n"); - break; -#endif - default: operand = opcode & 0x3F; switch (opcode & 0xC0) { diff --git a/libunwind/src/Registers.hpp b/libunwind/src/Registers.hpp index 658482433af..37ec84b8264 100644 --- a/libunwind/src/Registers.hpp +++ b/libunwind/src/Registers.hpp @@ -1786,7 +1786,7 @@ private: uint64_t __lr; // Link register x30 uint64_t __sp; // Stack pointer x31 uint64_t __pc; // Program counter - uint64_t __ra_sign_state; // RA sign state register + uint64_t padding; // 16-byte align }; GPRs _registers; @@ -1822,8 +1822,6 @@ inline bool Registers_arm64::validRegister(int regNum) const { return false; if (regNum > 95) return false; - if (regNum == UNW_ARM64_RA_SIGN_STATE) - return true; if ((regNum > 31) && (regNum < 64)) return false; return true; @@ -1834,11 +1832,8 @@ inline uint64_t Registers_arm64::getRegister(int regNum) const { return _registers.__pc; if (regNum == UNW_REG_SP) return _registers.__sp; - if (regNum == UNW_ARM64_RA_SIGN_STATE) - return _registers.__ra_sign_state; if ((regNum >= 0) && (regNum < 32)) return _registers.__x[regNum]; - _LIBUNWIND_ABORT("unsupported arm64 register"); } @@ -1847,8 +1842,6 @@ inline void Registers_arm64::setRegister(int regNum, uint64_t value) { _registers.__pc = value; else if (regNum == UNW_REG_SP) _registers.__sp = value; - else if (regNum == UNW_ARM64_RA_SIGN_STATE) - _registers.__ra_sign_state = value; else if ((regNum >= 0) && (regNum < 32)) _registers.__x[regNum] = value; else diff --git a/libunwind/src/dwarf2.h b/libunwind/src/dwarf2.h index 58525eea044..0dcd2ca99ba 100644 --- a/libunwind/src/dwarf2.h +++ b/libunwind/src/dwarf2.h @@ -49,10 +49,7 @@ enum { // GNU extensions DW_CFA_GNU_window_save = 0x2D, DW_CFA_GNU_args_size = 0x2E, - DW_CFA_GNU_negative_offset_extended = 0x2F, - - // AARCH64 extensions - DW_CFA_AARCH64_negate_ra_state = 0x2D + DW_CFA_GNU_negative_offset_extended = 0x2F }; |