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| author | Thomas Preud'homme <thomas.preudhomme@arm.com> | 2016-08-04 15:36:52 +0100 |
|---|---|---|
| committer | Thomas Preud'homme <thomas.preudhomme@arm.com> | 2016-08-04 15:36:52 +0100 |
| commit | 4ba2ef8fbe74716708e5ce0bcba4f3b1cc8ac99a (patch) | |
| tree | 1765b4f578102d53c5f142e9bd6473f129327385 /ld/ld.texinfo | |
| parent | 024425668d120663a73913352df701c8f0aea316 (diff) | |
| download | gdb-4ba2ef8fbe74716708e5ce0bcba4f3b1cc8ac99a.zip gdb-4ba2ef8fbe74716708e5ce0bcba4f3b1cc8ac99a.tar.gz gdb-4ba2ef8fbe74716708e5ce0bcba4f3b1cc8ac99a.tar.bz2 | |
2016-08-04 Thomas Preud'homme <thomas.preudhomme@arm.com>
bfd/
* elf32-arm.c (CMSE_PREFIX): Define macro.
(elf32_arm_stub_cmse_branch_thumb_only): Define stub sequence.
(cmse_branch_thumb_only): Declare stub.
(struct elf32_arm_link_hash_table): Define cmse_stub_sec field.
(elf32_arm_get_plt_info): Add globals parameter. Use it to return
FALSE if there is no PLT.
(arm_type_of_stub): Adapt to new elf32_arm_get_plt_info signature.
(elf32_arm_final_link_relocate): Likewise.
(elf32_arm_gc_sweep_hook): Likewise.
(elf32_arm_gc_mark_extra_sections): Mark sections holding ARMv8-M
secure entry functions.
(arm_stub_is_thumb): Add case for arm_stub_cmse_branch_thumb_only.
(arm_dedicated_stub_output_section_required): Change to a switch case
and add a case for arm_stub_cmse_branch_thumb_only.
(arm_dedicated_stub_output_section_required_alignment): Likewise.
(arm_stub_dedicated_output_section_name): Likewise.
(arm_stub_dedicated_input_section_ptr): Likewise and remove
ATTRIBUTE_UNUSED for htab parameter.
(arm_stub_required_alignment): Likewise.
(arm_stub_sym_claimed): Likewise.
(arm_dedicated_stub_section_padding): Likewise.
(cmse_scan): New function.
(elf32_arm_size_stubs): Call cmse_scan for ARM M profile targets.
Set stub_changed to TRUE if such veneers were created.
(elf32_arm_swap_symbol_in): Add detection code for CMSE special
symbols.
include/
* arm.h (ARM_GET_SYM_CMSE_SPCL): Define macro.
(ARM_SET_SYM_CMSE_SPCL): Likewise.
ld/
* ld.texinfo (Placement of SG veneers): New concept entry.
* testsuite/ld-arm/arm-elf.exp
(Secure gateway veneers: no .gnu.sgstubs section): New test.
(Secure gateway veneers: wrong entry functions): Likewise.
(Secure gateway veneers (ARMv8-M Baseline)): Likewise.
(Secure gateway veneers (ARMv8-M Mainline)): Likewise.
* testsuite/ld-arm/cmse-veneers.s: New file.
* testsuite/ld-arm/cmse-veneers.d: Likewise.
* testsuite/ld-arm/cmse-veneers.rd: Likewise.
* testsuite/ld-arm/cmse-veneers.sd: Likewise.
* testsuite/ld-arm/cmse-veneers-no-gnu_sgstubs.out: Likewise.
* testsuite/ld-arm/cmse-veneers-wrong-entryfct.out: Likewise.
Diffstat (limited to 'ld/ld.texinfo')
| -rw-r--r-- | ld/ld.texinfo | 6 |
1 files changed, 6 insertions, 0 deletions
diff --git a/ld/ld.texinfo b/ld/ld.texinfo index b2dff10..af8cee3 100644 --- a/ld/ld.texinfo +++ b/ld/ld.texinfo @@ -6853,6 +6853,12 @@ entries which only support 512Mb of code. The @samp{--no-apply-dynamic-relocs} option makes AArch64 linker do not apply link-time values for dynamic relocations. +@cindex Placement of SG veneers +All SG veneers are placed in the special output section @code{.gnu.sgstubs}. +Its start address must be set, either with the command line option +@samp{--section-start} or in a linker script, to indicate where to place these +veneers in memory. + @ifclear GENERIC @lowersections @end ifclear |