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If GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS is set on any input relocatable files: 1. Don't generate copy relocations. 2. Turn off extern_protected_data since it implies GNU_PROPERTY_NO_COPY_ON_PROTECTED. 3. Treate reference to protected symbols with indirect external access as local. 4. Set GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS on output. 5. When generating executable, clear this bit when there are non-GOT or non-PLT relocations in input relocatable files without the bit set. 6. Add -z [no]indirect-extern-access to control indirect external access. bfd/ * elf-bfd (elf_obj_tdata): Add has_indirect_extern_access. (elf_has_indirect_extern_access): New. * elf-properties.c (_bfd_elf_parse_gnu_properties): Set elf_has_indirect_extern_access and elf_has_no_copy_on_protected when seeing GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS. (elf_write_gnu_propertie): Add an argument to pass link_info. Set needed_1_p for GNU_PROPERTY_1_NEEDED in memory. (_bfd_elf_link_setup_gnu_properties): Handle GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS for -z indirect-extern-access. Set nocopyreloc to true and extern_protected_data to false for indirect external access. (_bfd_elf_convert_gnu_properties): Updated. * elf32-i386.c (elf_i386_check_relocs): Set non_got_ref_without_indirect_extern_access on legacy non-GOT or non-PLT references. * elf64-x86-64.c (elf_x86_64_check_relocs): Likewise. * elflink.c (_bfd_elf_symbol_refs_local_p): Return true for STV_PROTECTED symbols with indirect external access. * elfxx-x86.c (_bfd_x86_elf_adjust_dynamic_symbol): Clear indirect_extern_access for legacy non-GOT/non-PLT references. * elfxx-x86.h (elf_x86_link_hash_entry): Add non_got_ref_without_indirect_extern_access. include/ * bfdlink.h (bfd_link_info): Add indirect_extern_access and needed_1_p. Change nocopyreloc to int. ld/ * NEWS: Mention -z [no]indirect-extern-access * ld.texi: Document -z [no]indirect-extern-access * ldmain.c (main): Initialize link_info.indirect_extern_access to -1. * emulparams/extern_protected_data.sh: Support -z [no]indirect-extern-access. * testsuite/ld-elf/indirect-extern-access-1.rd: New file * testsuite/ld-elf/indirect-extern-access-1a.c: Likewise. * testsuite/ld-elf/indirect-extern-access-1b.c: Likewise. * testsuite/ld-elf/indirect-extern-access-2.rd: Likewise. * testsuite/ld-elf/indirect-extern-access-2a.c: Likewise. * testsuite/ld-elf/indirect-extern-access-2b.c: Likewise. * testsuite/ld-elf/indirect-extern-access-3.rd: Likewise. * testsuite/ld-elf/indirect-extern-access.S: Likewise. * testsuite/ld-elf/property-1_needed-1b.d: Likewise. * testsuite/ld-elf/property-1_needed-1c.d: Likewise. * testsuite/ld-x86-64/indirect-extern-access.rd: Likewise. * testsuite/ld-x86-64/protected-data-1.h: Likewise. * testsuite/ld-x86-64/protected-data-1a.c: Likewise. * testsuite/ld-x86-64/protected-data-1b.c: Likewise. * testsuite/ld-x86-64/protected-data-2a.S: Likewise. * testsuite/ld-x86-64/protected-data-2b.S: Likewise. * testsuite/ld-x86-64/protected-func-2a.S: Likewise. * testsuite/ld-x86-64/protected-func-2b.S: Likewise. * testsuite/ld-x86-64/protected-func-2c.c: Likewise. * testsuite/ld-elf/linux-x86.exp: Run test with GNU_PROPERTY_1_NEEDED_INDIRECT_EXTERN_ACCESS. * testsuite/ld-x86-64/x86-64.exp: Run tests for protected function and data with indirect external access.
14 lines
224 B
C
14 lines
224 B
C
#include <stdio.h>
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extern void indirect_extern_access (void);
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extern void *indirect_extern_access_p (void);
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int
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main (void)
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{
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if (&indirect_extern_access == indirect_extern_access_p ())
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puts ("PASS");
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return 0;
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}
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