This enables generation of SFrame V3 stack trace information for VDSO on x86-64. It's a continuation of Josh's and Steve's work:
https://lore.kernel.org/all/[email protected]/ https://lore.kernel.org/all/[email protected]/ This series focuses only on the VDSO code. They are helpful fixes and updates that doesn't rely on sframes (although the last patch is sframe related). This series applies on top of tip:x86/entry: git://git.kernel.org/pub/scm/linux/kernel/git/tip/tip.git x86/entry Like the unwind user sframe series [1] it depends on the binutils 2.46 release to be used to build the VDSO with SFrame V3 stack trace information (using the assembler option --gsframe-3). [1]: [PATCH v13 00/18] unwind_deferred: Implement sframe handling, https://lore.kernel.org/all/[email protected]/ Changes in v9 (see indivicual patch notes): - Always define KEEP_SFRAME to either true/false in specific VDSO linker scripts and use #if instead of #ifdef in common one. (Peter) - Reword patch 6 commit message to provide more details. - Note: Binutils 2.46 with SFrame V3 support has been released. Changes in v8: - Discard .sframe for x32 and x86-32 VDSOs. (Josh/Indu) - Define CFI_SIGNAL_FRAME for !BUILD_VDSO. - Drop .cfi_sections .sframe in dwarf2.h in favor of the explicitly specified more specific assembler option --gsframe-3. - Incorporate missing changes and review feedback from Steven's v6 (I erroneously based my v6 on Steven's v5): - Reword patch 3 commit subject to Steven's v6 one. - Remove SYM_F_ALIGN in __vdso_sgx_enter_enclave(). (Josh) Changes in v7: - Rebase on H. Peter Anvin's vDSO changes on tip:x86/entry. (Peter) - Simplify adding assembler option -Wa,--gsframe-3. Add for vdso64 only. - Align to .eh_frame and mark .sframe as KEEP in vDSO linker script. Note that GNU linker 2.46 will mark .sframe as KEEP in its default linker script as well. Changes in v6: - SFrame V3 support (SFrame V2 is not supported). - Prevent GNU_SFRAME program table entry to empty .sframe section. - Integrate v5 review feedback. (Josh) Regards, Jens Josh Poimboeuf (6): x86/vdso: Fix DWARF generation for getrandom() x86/asm: Avoid emitting DWARF CFI for non-VDSO x86/asm: Use CFI_* macros in SYM_FUNC_* macros so they can be added to VDSO x86/vdso: Use SYM_FUNC_{START,END} in __kernel_vsyscall() x86/vdso: Use CFI macros in __vdso_sgx_enter_enclave() x86/vdso: Enable sframe generation in VDSO arch/Kconfig | 7 +++ arch/x86/entry/vdso/common/vdso-layout.lds.S | 17 +++++- arch/x86/entry/vdso/vdso32/system_call.S | 10 +--- arch/x86/entry/vdso/vdso32/vdso32.lds.S | 3 ++ arch/x86/entry/vdso/vdso64/Makefile | 1 + arch/x86/entry/vdso/vdso64/vdso64.lds.S | 2 + arch/x86/entry/vdso/vdso64/vdsox32.lds.S | 6 +++ .../x86/entry/vdso/vdso64/vgetrandom-chacha.S | 3 +- arch/x86/entry/vdso/vdso64/vsgx.S | 18 +++---- arch/x86/include/asm/dwarf2.h | 52 +++++++++++++------ arch/x86/include/asm/linkage.h | 33 +++++++++--- arch/x86/include/asm/vdso.h | 1 - 12 files changed, 107 insertions(+), 46 deletions(-) -- 2.51.0
