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| author | Ian Lance Taylor <ian@airs.com> | 2011-07-02 00:03:25 +0000 |
|---|---|---|
| committer | Ian Lance Taylor <ian@airs.com> | 2011-07-02 00:03:25 +0000 |
| commit | 02d7cd4495b617a9dc356b4f5140a74d020df6f5 (patch) | |
| tree | 14729ef21007268b56536b188b055be2987a4ca3 /gold/x86_64.cc | |
| parent | 3f26b7e8cb3d1e545a1461ded51f24259b1795e7 (diff) | |
| download | gdb-02d7cd4495b617a9dc356b4f5140a74d020df6f5.zip gdb-02d7cd4495b617a9dc356b4f5140a74d020df6f5.tar.gz gdb-02d7cd4495b617a9dc356b4f5140a74d020df6f5.tar.bz2 | |
PR gold/12525
* ehframe.cc (Eh_frame_hdr::get_fde_pc): Handle DW_EH_PE_datarel.
Assert if we see DW_EH_PE_indirect.
* target.h (Target::ehframe_datarel_base): New function.
(Target::do_ehframe_datarel_base): New target function.
* i386.cc (Target_i386::do_ehframe_datarel_base): New function.
* x86_64.cc (Target_x86_64::do_ehframe_datarel_base): New
function.
Diffstat (limited to 'gold/x86_64.cc')
| -rw-r--r-- | gold/x86_64.cc | 19 |
1 files changed, 19 insertions, 0 deletions
diff --git a/gold/x86_64.cc b/gold/x86_64.cc index 12a5467..8308bf4 100644 --- a/gold/x86_64.cc +++ b/gold/x86_64.cc @@ -350,6 +350,10 @@ class Target_x86_64 : public Sized_target<64, false> do_can_check_for_function_pointers() const { return !parameters->options().pie(); } + // Return the base for a DW_EH_PE_datarel encoding. + uint64_t + do_ehframe_datarel_base() const; + // Adjust -fsplit-stack code which calls non-split-stack code. void do_calls_non_split(Relobj* object, unsigned int shndx, @@ -3640,6 +3644,21 @@ Target_x86_64::do_reloc_addend(void* arg, unsigned int r_type, return psymval->value(ti.object, 0); } +// Return the value to use for the base of a DW_EH_PE_datarel offset +// in an FDE. Solaris and SVR4 use DW_EH_PE_datarel because their +// assembler can not write out the difference between two labels in +// different sections, so instead of using a pc-relative value they +// use an offset from the GOT. + +uint64_t +Target_x86_64::do_ehframe_datarel_base() const +{ + gold_assert(this->global_offset_table_ != NULL); + Symbol* sym = this->global_offset_table_; + Sized_symbol<64>* ssym = static_cast<Sized_symbol<64>*>(sym); + return ssym->value(); +} + // FNOFFSET in section SHNDX in OBJECT is the start of a function // compiled with -fsplit-stack. The function calls non-split-stack // code. We have to change the function so that it always ensures |