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Without this support, the .cfi_negate_ra_state directive was being ignored: no SFrame unwind information was being generated for those code regions (bounded by the .cfi_startproc/.cfi_endproc) that contained a .cfi_negate_ra_state directive. The support is split in small patches to hopefully ease the review. In a follow up patch series, support for .cfi_b_key_frame will be added. Testing notes: - Regression tested cross build of several targets on an x86_64 host and an aarch64 host using a regression script that checks for failures in gas, ld, binutils, libctf and libsframe. - Regression tested native builds on x86_64 and aarch64. - binutils/gdb try bot showed no new regressions. Thanks, Indu Bhagat (6): [1/6] sframe.h: add support for .cfi_negate_ra_state [2/6] gas: sframe: add support for .cfi_negate_ra_state [3/6] gas: sframe: testsuite: add testcase for .cfi_negate_ra_state [4/6] libsframe: provide new access API for mangled RA bit [5/6] objdump/readelf: sframe: emit marker for FREs with mangled RA [6/6] sframe: doc: update spec for the mangled-RA bit in FRE gas/gen-sframe.c | 41 +++++++++++++++---- gas/gen-sframe.h | 6 ++- .../gas/cfi-sframe/cfi-sframe-aarch64-2.d | 20 +++++++++ ...ommon-empty-4.s => cfi-sframe-aarch64-2.s} | 3 +- gas/testsuite/gas/cfi-sframe/cfi-sframe.exp | 2 +- gas/testsuite/gas/cfi-sframe/common-empty-4.d | 14 ------- include/sframe-api.h | 7 ++++ include/sframe.h | 23 +++++++---- libsframe/doc/sframe-spec.texi | 4 +- libsframe/sframe-dump.c | 13 ++++-- libsframe/sframe.c | 18 ++++++++ 11 files changed, 113 insertions(+), 38 deletions(-) create mode 100644 gas/testsuite/gas/cfi-sframe/cfi-sframe-aarch64-2.d rename gas/testsuite/gas/cfi-sframe/{common-empty-4.s => cfi-sframe-aarch64-2.s} (85%) delete mode 100644 gas/testsuite/gas/cfi-sframe/common-empty-4.d