From 603cc93252a4f1e3f4026d06c0cf7eb883be997c Mon Sep 17 00:00:00 2001 From: Indu Bhagat Date: Thu, 3 Apr 2025 12:26:09 -0700 Subject: [PATCH] NEWS: sframe: mention new semantics for SFrame FDE function start addr The SFrame FDE's function start address is always emitted as follows by GAS and ld: it is the offset of the start PC of the respective function from the FDE field itself. GAS and ld will emit a flag SFRAME_F_FDE_FUNC_START_ADDR_PCREL set to 1 when emitting the field in this encoding. binutils/ * NEWS: Announce the change of encoding for SFrame FDE func start addr field. --- binutils/NEWS | 10 ++++++++++ 1 file changed, 10 insertions(+) diff --git a/binutils/NEWS b/binutils/NEWS index a4599d91ad9..2e12486fdee 100644 --- a/binutils/NEWS +++ b/binutils/NEWS @@ -1,5 +1,15 @@ -*- text -*- +* For SFrame stack trace format, the function start address in each SFrame FDE + has a changed encoding: The 32-bit signed integer now holds the offset of + the start PC of the associated function from the sfde_func_start_address + field itself (instead of the earlier where it was the offset from the start + of the SFrame section itself). All SFrame sections generated by gas and ld + generate the new encoding by default, with the (new) flag set: + SFRAME_F_FDE_FUNC_START_ADDR_PCREL to indicate the changed encoding. + + Relocatable SFrame links are now fixed. + * For RISC-V dis-assembler, the definition of mapping symbol $x is changed, so the file needs to be rebuilt since 2.45 once used .option arch directives. -- 2.47.2