Vendor import of LLVM libunwind release_80 branch r364487:
https://llvm.org/svn/llvm-project/libunwind/branches/release_80@364487
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Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/vendor/llvm-libunwind/dist-release_80/; revision=349783 svn path=/vendor/llvm-libunwind/libunwind-release_80-r364487/; revision=349784; tag=vendor/llvm-libunwind/libunwind-release_80-r364487
@ -234,6 +234,31 @@ int DwarfInstructions<A, R>::stepWithDwarf(A &addressSpace, pint_t pc,
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}
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#endif
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#if defined(_LIBUNWIND_TARGET_PPC64)
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#define PPC64_ELFV1_R2_LOAD_INST_ENCODING 0xe8410028u // ld r2,40(r1)
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#define PPC64_ELFV1_R2_OFFSET 40
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#define PPC64_ELFV2_R2_LOAD_INST_ENCODING 0xe8410018u // ld r2,24(r1)
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#define PPC64_ELFV2_R2_OFFSET 24
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// If the instruction at return address is a TOC (r2) restore,
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// then r2 was saved and needs to be restored.
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// ELFv2 ABI specifies that the TOC Pointer must be saved at SP + 24,
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// while in ELFv1 ABI it is saved at SP + 40.
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if (R::getArch() == REGISTERS_PPC64 && returnAddress != 0) {
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pint_t sp = newRegisters.getRegister(UNW_REG_SP);
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pint_t r2 = 0;
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switch (addressSpace.get32(returnAddress)) {
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case PPC64_ELFV1_R2_LOAD_INST_ENCODING:
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r2 = addressSpace.get64(sp + PPC64_ELFV1_R2_OFFSET);
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break;
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case PPC64_ELFV2_R2_LOAD_INST_ENCODING:
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r2 = addressSpace.get64(sp + PPC64_ELFV2_R2_OFFSET);
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break;
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}
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if (r2)
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newRegisters.setRegister(UNW_PPC64_R2, r2);
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}
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#endif
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// Return address is address after call site instruction, so setting IP to
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// that does simualates a return.
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newRegisters.setIP(returnAddress);
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@ -35,6 +35,20 @@
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#define SEPARATOR ;
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#endif
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#if defined(__powerpc64__) && (!defined(_CALL_ELF) || _CALL_ELF == 1)
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#define PPC64_OPD1 .section .opd,"aw",@progbits SEPARATOR
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#define PPC64_OPD2 SEPARATOR \
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.p2align 3 SEPARATOR \
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.quad .Lfunc_begin0 SEPARATOR \
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.quad .TOC.@tocbase SEPARATOR \
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.quad 0 SEPARATOR \
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.text SEPARATOR \
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.Lfunc_begin0:
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#else
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#define PPC64_OPD1
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#define PPC64_OPD2
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#endif
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#define GLUE2(a, b) a ## b
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#define GLUE(a, b) GLUE2(a, b)
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#define SYMBOL_NAME(name) GLUE(__USER_LABEL_PREFIX__, name)
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@ -95,7 +109,9 @@
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.globl SYMBOL_NAME(name) SEPARATOR \
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EXPORT_SYMBOL(name) SEPARATOR \
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SYMBOL_IS_FUNC(SYMBOL_NAME(name)) SEPARATOR \
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SYMBOL_NAME(name):
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PPC64_OPD1 \
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SYMBOL_NAME(name): \
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PPC64_OPD2
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#define DEFINE_LIBUNWIND_PRIVATE_FUNCTION(name) \
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.globl SYMBOL_NAME(name) SEPARATOR \
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