* powerpc.cc (Target_powerpc::define_save_restore_funcs): New func.
(Target_powerpc::do_finalize_sections): Call it. (Output_data_save_res): New class and supporting functions. (Target_powerpc::symval_for_branch): Only look up .opd entry for normal symbols defined in object files.
This commit is contained in:
Alan Modra
parent
49cf4c5b60
commit
f3a0ed298a
2 changed files with 371 additions and 0 deletions
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@ -1,3 +1,11 @@
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2012-10-16 Alan Modra <amodra@gmail.com>
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* powerpc.cc (Target_powerpc::define_save_restore_funcs): New func.
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(Target_powerpc::do_finalize_sections): Call it.
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(Output_data_save_res): New class and supporting functions.
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(Target_powerpc::symval_for_branch): Only look up .opd entry for
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normal symbols defined in object files.
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2012-10-12 Alan Modra <amodra@gmail.com>
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2012-10-12 Alan Modra <amodra@gmail.com>
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* powerpc.cc (Powerpc_relobj::add_gc_mark, process_gc_mark): New.
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* powerpc.cc (Powerpc_relobj::add_gc_mark, process_gc_mark): New.
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363
gold/powerpc.cc
363
gold/powerpc.cc
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@ -325,6 +325,10 @@ class Target_powerpc : public Sized_target<size, big_endian>
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return NULL;
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return NULL;
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}
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}
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// Provide linker defined save/restore functions.
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void
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define_save_restore_funcs(Layout*, Symbol_table*);
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// Finalize the sections.
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// Finalize the sections.
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void
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void
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do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
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do_finalize_sections(Layout*, const Input_objects*, Symbol_table*);
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@ -1713,16 +1717,21 @@ static const uint32_t addis_3_13 = 0x3c6d0000;
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static const uint32_t b = 0x48000000;
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static const uint32_t b = 0x48000000;
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static const uint32_t bcl_20_31 = 0x429f0005;
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static const uint32_t bcl_20_31 = 0x429f0005;
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static const uint32_t bctr = 0x4e800420;
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static const uint32_t bctr = 0x4e800420;
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static const uint32_t blr = 0x4e800020;
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static const uint32_t blrl = 0x4e800021;
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static const uint32_t blrl = 0x4e800021;
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static const uint32_t cror_15_15_15 = 0x4def7b82;
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static const uint32_t cror_15_15_15 = 0x4def7b82;
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static const uint32_t cror_31_31_31 = 0x4ffffb82;
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static const uint32_t cror_31_31_31 = 0x4ffffb82;
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static const uint32_t ld_0_1 = 0xe8010000;
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static const uint32_t ld_0_12 = 0xe80c0000;
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static const uint32_t ld_11_12 = 0xe96c0000;
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static const uint32_t ld_11_12 = 0xe96c0000;
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static const uint32_t ld_11_2 = 0xe9620000;
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static const uint32_t ld_11_2 = 0xe9620000;
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static const uint32_t ld_2_1 = 0xe8410000;
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static const uint32_t ld_2_1 = 0xe8410000;
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static const uint32_t ld_2_11 = 0xe84b0000;
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static const uint32_t ld_2_11 = 0xe84b0000;
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static const uint32_t ld_2_12 = 0xe84c0000;
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static const uint32_t ld_2_12 = 0xe84c0000;
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static const uint32_t ld_2_2 = 0xe8420000;
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static const uint32_t ld_2_2 = 0xe8420000;
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static const uint32_t lfd_0_1 = 0xc8010000;
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static const uint32_t li_0_0 = 0x38000000;
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static const uint32_t li_0_0 = 0x38000000;
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static const uint32_t li_12_0 = 0x39800000;
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static const uint32_t lis_0_0 = 0x3c000000;
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static const uint32_t lis_0_0 = 0x3c000000;
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static const uint32_t lis_11 = 0x3d600000;
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static const uint32_t lis_11 = 0x3d600000;
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static const uint32_t lis_12 = 0x3d800000;
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static const uint32_t lis_12 = 0x3d800000;
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@ -1731,6 +1740,7 @@ static const uint32_t lwz_11_11 = 0x816b0000;
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static const uint32_t lwz_11_30 = 0x817e0000;
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static const uint32_t lwz_11_30 = 0x817e0000;
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static const uint32_t lwz_12_12 = 0x818c0000;
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static const uint32_t lwz_12_12 = 0x818c0000;
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static const uint32_t lwzu_0_12 = 0x840c0000;
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static const uint32_t lwzu_0_12 = 0x840c0000;
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static const uint32_t lvx_0_12_0 = 0x7c0c00ce;
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static const uint32_t mflr_0 = 0x7c0802a6;
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static const uint32_t mflr_0 = 0x7c0802a6;
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static const uint32_t mflr_11 = 0x7d6802a6;
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static const uint32_t mflr_11 = 0x7d6802a6;
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static const uint32_t mflr_12 = 0x7d8802a6;
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static const uint32_t mflr_12 = 0x7d8802a6;
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@ -1740,7 +1750,11 @@ static const uint32_t mtlr_0 = 0x7c0803a6;
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static const uint32_t mtlr_12 = 0x7d8803a6;
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static const uint32_t mtlr_12 = 0x7d8803a6;
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static const uint32_t nop = 0x60000000;
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static const uint32_t nop = 0x60000000;
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static const uint32_t ori_0_0_0 = 0x60000000;
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static const uint32_t ori_0_0_0 = 0x60000000;
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static const uint32_t std_0_1 = 0xf8010000;
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static const uint32_t std_0_12 = 0xf80c0000;
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static const uint32_t std_2_1 = 0xf8410000;
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static const uint32_t std_2_1 = 0xf8410000;
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static const uint32_t stfd_0_1 = 0xd8010000;
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static const uint32_t stvx_0_12_0 = 0x7c0c01ce;
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static const uint32_t sub_11_11_12 = 0x7d6c5850;
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static const uint32_t sub_11_11_12 = 0x7d6c5850;
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// Write out the PLT.
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// Write out the PLT.
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@ -2417,6 +2431,335 @@ Output_data_glink<size, big_endian>::do_write(Output_file* of)
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of->write_output_view(off, oview_size, oview);
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of->write_output_view(off, oview_size, oview);
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}
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}
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// A class to handle linker generated save/restore functions.
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template<int size, bool big_endian>
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class Output_data_save_res : public Output_section_data_build
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{
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public:
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Output_data_save_res(Symbol_table* symtab);
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protected:
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// Write to a map file.
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void
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do_print_to_mapfile(Mapfile* mapfile) const
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{ mapfile->print_output_data(this, _("** save/restore")); }
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void
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do_write(Output_file*);
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private:
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// The maximum size of save/restore contents.
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static const unsigned int savres_max = 218*4;
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void
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savres_define(Symbol_table* symtab,
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const char *name,
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unsigned int lo, unsigned int hi,
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unsigned char* write_ent(unsigned char*, int),
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unsigned char* write_tail(unsigned char*, int));
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unsigned char *contents_;
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};
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template<bool big_endian>
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static unsigned char*
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savegpr0(unsigned char* p, int r)
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{
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uint32_t insn = std_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
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write_insn<big_endian>(p, insn);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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savegpr0_tail(unsigned char* p, int r)
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{
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p = savegpr0<big_endian>(p, r);
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uint32_t insn = std_0_1 + 16;
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write_insn<big_endian>(p, insn);
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p = p + 4;
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write_insn<big_endian>(p, blr);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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restgpr0(unsigned char* p, int r)
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{
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uint32_t insn = ld_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
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write_insn<big_endian>(p, insn);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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restgpr0_tail(unsigned char* p, int r)
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{
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uint32_t insn = ld_0_1 + 16;
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write_insn<big_endian>(p, insn);
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p = p + 4;
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p = restgpr0<big_endian>(p, r);
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write_insn<big_endian>(p, mtlr_0);
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p = p + 4;
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if (r == 29)
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{
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p = restgpr0<big_endian>(p, 30);
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p = restgpr0<big_endian>(p, 31);
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}
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write_insn<big_endian>(p, blr);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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savegpr1(unsigned char* p, int r)
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{
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uint32_t insn = std_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
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write_insn<big_endian>(p, insn);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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savegpr1_tail(unsigned char* p, int r)
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{
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p = savegpr1<big_endian>(p, r);
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write_insn<big_endian>(p, blr);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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restgpr1(unsigned char* p, int r)
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{
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uint32_t insn = ld_0_12 + (r << 21) + (1 << 16) - (32 - r) * 8;
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write_insn<big_endian>(p, insn);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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restgpr1_tail(unsigned char* p, int r)
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{
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p = restgpr1<big_endian>(p, r);
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write_insn<big_endian>(p, blr);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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savefpr(unsigned char* p, int r)
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{
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uint32_t insn = stfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
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write_insn<big_endian>(p, insn);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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savefpr0_tail(unsigned char* p, int r)
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{
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p = savefpr<big_endian>(p, r);
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write_insn<big_endian>(p, std_0_1 + 16);
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p = p + 4;
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write_insn<big_endian>(p, blr);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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restfpr(unsigned char* p, int r)
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{
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uint32_t insn = lfd_0_1 + (r << 21) + (1 << 16) - (32 - r) * 8;
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write_insn<big_endian>(p, insn);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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restfpr0_tail(unsigned char* p, int r)
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{
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write_insn<big_endian>(p, ld_0_1 + 16);
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p = p + 4;
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p = restfpr<big_endian>(p, r);
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write_insn<big_endian>(p, mtlr_0);
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p = p + 4;
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if (r == 29)
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{
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p = restfpr<big_endian>(p, 30);
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p = restfpr<big_endian>(p, 31);
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}
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write_insn<big_endian>(p, blr);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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savefpr1_tail(unsigned char* p, int r)
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{
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p = savefpr<big_endian>(p, r);
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write_insn<big_endian>(p, blr);
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return p + 4;
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}
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template<bool big_endian>
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static unsigned char*
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restfpr1_tail(unsigned char* p, int r)
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{
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p = restfpr<big_endian>(p, r);
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write_insn<big_endian>(p, blr);
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return p + 4;
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}
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|
template<bool big_endian>
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static unsigned char*
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savevr(unsigned char* p, int r)
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|
{
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uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
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|
write_insn<big_endian>(p, insn);
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|
p = p + 4;
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insn = stvx_0_12_0 + (r << 21);
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|
write_insn<big_endian>(p, insn);
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|
return p + 4;
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|
}
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|
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|
template<bool big_endian>
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static unsigned char*
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savevr_tail(unsigned char* p, int r)
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|
{
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|
p = savevr<big_endian>(p, r);
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|
write_insn<big_endian>(p, blr);
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|
return p + 4;
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|
}
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|
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|
template<bool big_endian>
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|
static unsigned char*
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|
restvr(unsigned char* p, int r)
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|
{
|
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|
uint32_t insn = li_12_0 + (1 << 16) - (32 - r) * 16;
|
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|
write_insn<big_endian>(p, insn);
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|
p = p + 4;
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insn = lvx_0_12_0 + (r << 21);
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|
write_insn<big_endian>(p, insn);
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|
return p + 4;
|
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|
}
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|
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|
template<bool big_endian>
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|
static unsigned char*
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|
restvr_tail(unsigned char* p, int r)
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|
{
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|
p = restvr<big_endian>(p, r);
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|
write_insn<big_endian>(p, blr);
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|
return p + 4;
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|
}
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|
|
||||||
|
|
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|
template<int size, bool big_endian>
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|
Output_data_save_res<size, big_endian>::Output_data_save_res(
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|
Symbol_table* symtab)
|
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|
: Output_section_data_build(4),
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|
contents_(NULL)
|
||||||
|
{
|
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|
this->savres_define(symtab,
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|
"_savegpr0_", 14, 31,
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savegpr0<big_endian>, savegpr0_tail<big_endian>);
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this->savres_define(symtab,
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"_restgpr0_", 14, 29,
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|
restgpr0<big_endian>, restgpr0_tail<big_endian>);
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|
this->savres_define(symtab,
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|
"_restgpr0_", 30, 31,
|
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|
restgpr0<big_endian>, restgpr0_tail<big_endian>);
|
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|
this->savres_define(symtab,
|
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|
"_savegpr1_", 14, 31,
|
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|
savegpr1<big_endian>, savegpr1_tail<big_endian>);
|
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|
this->savres_define(symtab,
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|
"_restgpr1_", 14, 31,
|
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|
restgpr1<big_endian>, restgpr1_tail<big_endian>);
|
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|
this->savres_define(symtab,
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|
"_savefpr_", 14, 31,
|
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|
savefpr<big_endian>, savefpr0_tail<big_endian>);
|
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|
this->savres_define(symtab,
|
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|
"_restfpr_", 14, 29,
|
||||||
|
restfpr<big_endian>, restfpr0_tail<big_endian>);
|
||||||
|
this->savres_define(symtab,
|
||||||
|
"_restfpr_", 30, 31,
|
||||||
|
restfpr<big_endian>, restfpr0_tail<big_endian>);
|
||||||
|
this->savres_define(symtab,
|
||||||
|
"._savef", 14, 31,
|
||||||
|
savefpr<big_endian>, savefpr1_tail<big_endian>);
|
||||||
|
this->savres_define(symtab,
|
||||||
|
"._restf", 14, 31,
|
||||||
|
restfpr<big_endian>, restfpr1_tail<big_endian>);
|
||||||
|
this->savres_define(symtab,
|
||||||
|
"_savevr_", 20, 31,
|
||||||
|
savevr<big_endian>, savevr_tail<big_endian>);
|
||||||
|
this->savres_define(symtab,
|
||||||
|
"_restvr_", 20, 31,
|
||||||
|
restvr<big_endian>, restvr_tail<big_endian>);
|
||||||
|
}
|
||||||
|
|
||||||
|
template<int size, bool big_endian>
|
||||||
|
void
|
||||||
|
Output_data_save_res<size, big_endian>::savres_define(
|
||||||
|
Symbol_table* symtab,
|
||||||
|
const char *name,
|
||||||
|
unsigned int lo, unsigned int hi,
|
||||||
|
unsigned char* write_ent(unsigned char*, int),
|
||||||
|
unsigned char* write_tail(unsigned char*, int))
|
||||||
|
{
|
||||||
|
size_t len = strlen(name);
|
||||||
|
bool writing = false;
|
||||||
|
char sym[16];
|
||||||
|
|
||||||
|
memcpy(sym, name, len);
|
||||||
|
sym[len + 2] = 0;
|
||||||
|
|
||||||
|
for (unsigned int i = lo; i <= hi; i++)
|
||||||
|
{
|
||||||
|
sym[len + 0] = i / 10 + '0';
|
||||||
|
sym[len + 1] = i % 10 + '0';
|
||||||
|
Symbol* gsym = symtab->lookup(sym);
|
||||||
|
bool refd = gsym != NULL && gsym->is_undefined();
|
||||||
|
writing = writing || refd;
|
||||||
|
if (writing)
|
||||||
|
{
|
||||||
|
if (this->contents_ == NULL)
|
||||||
|
this->contents_ = new unsigned char[this->savres_max];
|
||||||
|
|
||||||
|
off_t value = this->current_data_size();
|
||||||
|
unsigned char* p = this->contents_ + value;
|
||||||
|
if (i != hi)
|
||||||
|
p = write_ent(p, i);
|
||||||
|
else
|
||||||
|
p = write_tail(p, i);
|
||||||
|
off_t cur_size = p - this->contents_;
|
||||||
|
this->set_current_data_size(cur_size);
|
||||||
|
if (refd)
|
||||||
|
symtab->define_in_output_data(sym, NULL, Symbol_table::PREDEFINED,
|
||||||
|
this, value, cur_size - value,
|
||||||
|
elfcpp::STT_FUNC, elfcpp::STB_GLOBAL,
|
||||||
|
elfcpp::STV_HIDDEN, 0, false, false);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
|
// Write out save/restore.
|
||||||
|
|
||||||
|
template<int size, bool big_endian>
|
||||||
|
void
|
||||||
|
Output_data_save_res<size, big_endian>::do_write(Output_file* of)
|
||||||
|
{
|
||||||
|
const off_t off = this->offset();
|
||||||
|
const section_size_type oview_size =
|
||||||
|
convert_to_section_size_type(this->data_size());
|
||||||
|
unsigned char* const oview = of->get_output_view(off, oview_size);
|
||||||
|
memcpy(oview, this->contents_, oview_size);
|
||||||
|
of->write_output_view(off, oview_size, oview);
|
||||||
|
}
|
||||||
|
|
||||||
|
|
||||||
// Create the glink section.
|
// Create the glink section.
|
||||||
|
|
||||||
template<int size, bool big_endian>
|
template<int size, bool big_endian>
|
||||||
|
|
@ -3701,6 +4044,22 @@ class Global_symbol_visitor_opd
|
||||||
}
|
}
|
||||||
};
|
};
|
||||||
|
|
||||||
|
template<int size, bool big_endian>
|
||||||
|
void
|
||||||
|
Target_powerpc<size, big_endian>::define_save_restore_funcs(
|
||||||
|
Layout* layout,
|
||||||
|
Symbol_table* symtab)
|
||||||
|
{
|
||||||
|
if (size == 64)
|
||||||
|
{
|
||||||
|
Output_data_save_res<64, big_endian>* savres
|
||||||
|
= new Output_data_save_res<64, big_endian>(symtab);
|
||||||
|
layout->add_output_section_data(".text", elfcpp::SHT_PROGBITS,
|
||||||
|
elfcpp::SHF_ALLOC | elfcpp::SHF_EXECINSTR,
|
||||||
|
savres, ORDER_TEXT, false);
|
||||||
|
}
|
||||||
|
}
|
||||||
|
|
||||||
// Finalize the sections.
|
// Finalize the sections.
|
||||||
|
|
||||||
template<int size, bool big_endian>
|
template<int size, bool big_endian>
|
||||||
|
|
@ -3744,6 +4103,7 @@ Target_powerpc<size, big_endian>::do_finalize_sections(
|
||||||
{
|
{
|
||||||
typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
|
typedef Global_symbol_visitor_opd<big_endian> Symbol_visitor;
|
||||||
symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
|
symtab->for_all_symbols<64, Symbol_visitor>(Symbol_visitor());
|
||||||
|
this->define_save_restore_funcs(layout, symtab);
|
||||||
}
|
}
|
||||||
|
|
||||||
// Fill in some more dynamic tags.
|
// Fill in some more dynamic tags.
|
||||||
|
|
@ -3802,6 +4162,9 @@ Target_powerpc<size, big_endian>::symval_for_branch(
|
||||||
// If the symbol is defined in an opd section, ie. is a function
|
// If the symbol is defined in an opd section, ie. is a function
|
||||||
// descriptor, use the function descriptor code entry address
|
// descriptor, use the function descriptor code entry address
|
||||||
Powerpc_relobj<size, big_endian>* symobj = object;
|
Powerpc_relobj<size, big_endian>* symobj = object;
|
||||||
|
if (gsym != NULL
|
||||||
|
&& gsym->source() != Symbol::FROM_OBJECT)
|
||||||
|
return value;
|
||||||
if (gsym != NULL)
|
if (gsym != NULL)
|
||||||
symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
|
symobj = static_cast<Powerpc_relobj<size, big_endian>*>(gsym->object());
|
||||||
unsigned int shndx = symobj->opd_shndx();
|
unsigned int shndx = symobj->opd_shndx();
|
||||||
|
|
|
||||||
Loading…
Add table
Reference in a new issue