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.

1 files changed, 27 insertions, 0 deletions

diff --git a/ld/testsuite/ld-arm/arm-elf.exp b/ld/testsuite/ld-arm/arm-elf.exp
index d0c9a2f..b3c8a84 100644
--- a/ld/testsuite/ld-arm/arm-elf.exp
+++ b/ld/testsuite/ld-arm/arm-elf.exp
@@ -642,6 +642,33 @@ set armeabitests_nonacl {
      {{objdump -d jump-reloc-veneers-long.d}}
      "jump-reloc-veneers-long"}
 
+    {"Secure gateway veneers: no .gnu.sgstubs section" "" ""
+     "-march=armv8-m.base -mthumb"
+     {cmse-veneers.s}
+     {{ld cmse-veneers-no-gnu_sgstubs.out}}
+     "cmse-veneers-no-gnu_sgstubs"}
+    {"Secure gateway veneers: wrong entry functions" "" ""
+     "-march=armv7-m -mthumb --defsym CHECK_ERRORS=1"
+     {cmse-veneers.s}
+     {{ld cmse-veneers-wrong-entryfct.out}}
+     "cmse-veneers-wrong-entryfct"}
+    {"Secure gateway veneers (ARMv8-M Baseline)"
+     "-Ttext=0x8000 --section-start .gnu.sgstubs=0x20000 --gc-sections" ""
+     "-march=armv8-m.base -mthumb"
+     {cmse-veneers.s}
+     {{objdump {-d -j .gnu.sgstubs} cmse-veneers.d}
+      {objdump {-h -j .gnu.sgstubs} cmse-veneers.sd}
+      {nm {} cmse-veneers.rd}}
+     "cmse-veneers-baseline"}
+    {"Secure gateway veneers (ARMv8-M Mainline)"
+     "-Ttext=0x8000 --section-start .gnu.sgstubs=0x20000 --gc-sections" ""
+     "-march=armv8-m.main -mthumb"
+     {cmse-veneers.s}
+     {{objdump {-d -j .gnu.sgstubs} cmse-veneers.d}
+      {objdump {-h -j .gnu.sgstubs} cmse-veneers.sd}
+      {nm {} cmse-veneers.rd}}
+     "cmse-veneers-mainline"}
+
     {"R_ARM_THM_JUMP19 Relocation veneers: Short"
      "--section-start destsect=0x000108002 --section-start .text=0x8000" ""
      "-march=armv7-m -mthumb"