forked from M-Labs/artiq-zynq
Libunwind: use dyld instead of static linker symbols for unwind section.
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@ -392,6 +392,10 @@ LocalAddressSpace::getEncodedP(pint_t &addr, pint_t end, uint8_t encoding,
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return result;
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}
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extern "C" {
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uintptr_t dl_unwind_find_exidx(uintptr_t pc, int *length);
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}
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inline bool LocalAddressSpace::findUnwindSections(pint_t targetAddr,
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UnwindInfoSections &info) {
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#ifdef __APPLE__
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@ -421,9 +425,11 @@ inline bool LocalAddressSpace::findUnwindSections(pint_t targetAddr,
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if (info.dwarf_section_length)
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return true;
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#elif defined(_LIBUNWIND_ARM_EHABI) && defined(_LIBUNWIND_IS_BAREMETAL)
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// Bare metal is statically linked, so no need to ask the dynamic loader
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info.arm_section = (uintptr_t)(&__exidx_start);
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info.arm_section_length = (uintptr_t)(&__exidx_end - &__exidx_start);
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// patched as our baremetal solution has a dynamic loader...
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int length = 0;
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info.arm_section =
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(uintptr_t)dl_unwind_find_exidx((uintptr_t)targetAddr, &length);
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info.arm_section_length = (uintptr_t)length * sizeof(EHABIIndexEntry);
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_LIBUNWIND_TRACE_UNWINDING("findUnwindSections: section %p length %p",
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(void *)info.arm_section, (void *)info.arm_section_length);
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if (info.arm_section && info.arm_section_length)
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