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authorThomas Preud'homme <thomas.preudhomme@arm.com>2016-08-26 10:59:26 +0100
committerThomas Preud'homme <thomas.preudhomme@arm.com>2016-08-26 11:00:36 +0100
commit0955507f6e7144c9c5e420bbcf617593b13de38b (patch)
tree01e7b1d24870728adf17b1bca5d21e2f937ef197 /ld/ld.texinfo
parent4edcc97c1a892325fcda1abe0d383802cc87a869 (diff)
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Add support for stable secure gateway veneers addresses
2016-08-26 Thomas Preud'homme <thomas.preudhomme@arm.com> bfd/ * bfd-in.h (bfd_elf32_arm_set_target_relocs): Add a new parameter for the input import library bfd. * bfd-in2.h: Regenerate. * elf32-arm.c (struct elf32_arm_link_hash_table): New in_implib_bfd and new_cmse_stub_offset fields. (stub_hash_newfunc): Initialize stub_offset and stub_template_size to -1. (elf32_arm_add_stub): Likewise for stub_offset. (arm_new_stubs_start_offset_ptr): New function. (arm_build_one_stub): Only allocate a stub_offset if it is -1. Allow empty SG veneers to have zero relocations. (arm_size_one_stub): Only initialize stub size and template information for non empty veneers. Do not update veneer section size if veneer already has an offset. (elf32_arm_create_stub): Return the stub entry pointer or NULL instead of a boolean indicating success or failure. (cmse_scan): Change stub_changed parameter into an integer pointer parameter cmse_stub_created to count the number of stub created and adapt to change of return value in elf32_arm_create_stub. (cmse_entry_fct_p): New function. (arm_list_new_cmse_stub): Likewise. (set_cmse_veneer_addr_from_implib): Likewise. (elf32_arm_size_stubs): Define cmse_stub_created, pass its address to cmse_scan instead of that of cmse_stub_changed to compute the number of stub created and use it to initialize stub_changed. Call set_cmse_veneer_addr_from_implib after all cmse_scan. Adapt to change of return value in elf32_arm_create_stub. Use arm_stub_section_start_offset () if not NULL to initialize size of secure gateway veneers section. Initialize stub_offset of Cortex-A8 erratum fix to -1. Use ret to hold return value. (elf32_arm_build_stubs): Use arm_stub_section_start_offset () if not NULL to initialize size of secure gateway veneers section. Adapt comment to stress the importance of zeroing veneer section content. (bfd_elf32_arm_set_target_relocs): Add new in_implib_bfd parameter to initialize eponymous field in struct elf32_arm_link_hash_table. ld/ * emultempl/armelf.em (in_implib_filename): Declare and initialize new variable. (arm_elf_create_output_section_statements): Open import input library file for writing and pass resulting in_implib_bfd to bfd_elf32_arm_set_target_relocs. (PARSE_AND_LIST_PROLOGUE): Define OPTION_IN_IMPLIB option. (PARSE_AND_LIST_LONGOPTS): Define --in-implib option. (PARSE_AND_LIST_OPTIONS): Add help message for --in-implib option. (PARSE_AND_LIST_ARGS_CASES): Handle new OPTION_IN_IMPLIB case. * ld.texinfo (--cmse-implib): Update to mention --in-implib. (--in-implib): Document new option. * NEWS: Likewise. * testsuite/ld-arm/arm-elf.exp (Secure gateway import library generation): add --defsym VER=1 to gas CLI. (Secure gateway import library generation: errors): Likewise. (Input secure gateway import library): New test. (Input secure gateway import library: no output import library): Likewise. (Input secure gateway import library: not an SG input import library): Likewise. (Input secure gateway import library: earlier stub section base): Likewise. (Input secure gateway import library: later stub section base): Likewise. (Input secure gateway import library: veneer comeback): Likewise. (Input secure gateway import library: entry function change): Likewise. * testsuite/ld-arm/cmse-implib.s: Add input import library testing. * testsuite/ld-arm/cmse-implib.rd: Update accordingly. * testsuite/ld-arm/cmse-new-implib.out: New file. * testsuite/ld-arm/cmse-new-implib.rd: Likewise. * testsuite/ld-arm/cmse-new-implib-no-output.out: Likewise. * testsuite/ld-arm/cmse-new-implib-not-sg-in-implib.out: Likewise. * testsuite/ld-arm/cmse-new-earlier-later-implib.out: Likewise. * testsuite/ld-arm/cmse-new-comeback-implib.rd: Likewise. * testsuite/ld-arm/cmse-new-wrong-implib.out: Likewise.
Diffstat (limited to 'ld/ld.texinfo')
-rw-r--r--ld/ld.texinfo12
1 files changed, 12 insertions, 0 deletions
diff --git a/ld/ld.texinfo b/ld/ld.texinfo
index e6813f2..0213851 100644
--- a/ld/ld.texinfo
+++ b/ld/ld.texinfo
@@ -6866,6 +6866,18 @@ specified by the @samp{--out-implib} and @samp{--in-implib} options are
secure gateway import libraries, suitable for linking a non-secure
executable against secure code as per ARMv8-M Security Extensions.
+@kindex --in-implib=@var{file}
+@cindex Input import library
+The @samp{--in-implib=file} specifies an input import library whose symbols
+must keep the same address in the executable being produced. A warning is
+given if no @samp{--out-implib} is given but new symbols have been introduced
+in the executable that should be listed in its import library. Otherwise, if
+@samp{--out-implib} is specified, the symbols are added to the output import
+library. A warning is also given if some symbols present in the input import
+library have disappeared from the executable. This option is only effective
+for Secure Gateway import libraries, ie. when @samp{--cmse-implib} is
+specified.
+
@ifclear GENERIC
@lowersections
@end ifclear