This fixes a section misalignement on i386, when CONFIG_DRM=y and CONFIG_DRM_USE_DYNAMIC_DEBUG=Y
In this config, the __dyndbg_classes section gets a single struct/record. On i386 this is 28-bytes, breaking the required ALIGN(8) on the following __dyndbg section. This breaks dynamic_debug_init() with a NULL pointer dereference; the section traversal logic encounters padding bytes instead of a valid descriptor. the series: 1. moves BOUNDED_SECTION_* macros from vmlinux.lds.h to its own file. v2- adds note that macros are for vmlinux.lds.h only, not for modules. 2. drops unused HEADERED_SECTION_* macros from that new file 3. adds ALIGN(8) into BOUNDED_SECTION* macros omission causing NULL ptr on i386 adds,uses BOUNDED_SECTION _ALIGNED variants 4. removes now redundant ALIGN(8)s in vmlinux.lds.h 5. adds dyndbg.lds.S to KEEP sections in modules follows codetag.lds.h model Signed-off-by: Jim Cromie <[email protected]> --- v3: - move #includes to top of files, - drop redundant ALIGN(8) in dydnbg.lds.S: DYNDBG_SECTIONS macro - add Reviewed-by tag (thx Petr) v2: - avoid BOUNDED_SECTION in modules, dont need _start & _end symbols. - sets 0 address to the sections, not just whatever current is. --- Jim Cromie (5): vmlinux.lds.h: refactor BOUNDED_SECTION_* macros into bounded_sections.lds.h vmlinux.lds.h: drop unused HEADERED_SECTION* macros vmlinux.lds.h: Fix ALIGN(8) omission causing NULL ptr on i386 vmlinux.lds.h: remove redundant ALIGN(8) directives dyndbg.lds.S: fix lost dyndbg sections in modules MAINTAINERS | 1 + include/asm-generic/bounded_sections.lds.h | 32 ++++++++++++++ include/asm-generic/dyndbg.lds.h | 18 ++++++++ include/asm-generic/vmlinux.lds.h | 68 ++++++------------------------ scripts/module.lds.S | 2 + 5 files changed, 66 insertions(+), 55 deletions(-) --- base-commit: dc59e4fea9d83f03bad6bddf3fa2e52491777482 change-id: 20260630-fix-align-589738662161 Best regards, -- Jim Cromie <[email protected]>
