From: chenmiao <[email protected]> Hello everyone,
This implements a basic text patching mechanism and a complete jump_label implementation for OpenRISC. 1. Implement the patch_map interface and the patch_insn_write single insn write API by providing FIX_TEXT_POKE0. And create a new insn-def.h to record openrisc's instruction macro definition which only have OPENRISC_INSN_SIZE now. 2. Based on the previously implemented patch_insn_write, achieve a complete jump_label implementation, directly supporting arch_jump_label_transform_queue. And add a new macro OPENRISC_INSN_NOP in insn-def.h. Link: https://lore.kernel.org/openrisc/[email protected]/T/#u Thanks, Chen Miao --- Changes in V3: - Removed the is_exit_text used, added some necessary comments. - Modify some macro like __ASSEMBLY__ to __ASSEMBLER__ and ensure the defconfig by make savedefconfig. Changes in V2: - Add a new insn-def.h to record the insn macro. - Modify the patch_insn_write API from const void* to u32 insn. - Using the modified patch_insn_write API in arch_jump_label_transform_queue. chenmiao (2): openrisc: Add text patching API support openrisc: Add jump label support .../core/jump-labels/arch-support.txt | 2 +- arch/openrisc/Kconfig | 2 + arch/openrisc/configs/or1ksim_defconfig | 19 ++--- arch/openrisc/configs/virt_defconfig | 2 +- arch/openrisc/include/asm/Kbuild | 1 - arch/openrisc/include/asm/fixmap.h | 1 + arch/openrisc/include/asm/insn-def.h | 15 ++++ arch/openrisc/include/asm/jump_label.h | 68 ++++++++++++++++ arch/openrisc/include/asm/text-patching.h | 13 ++++ arch/openrisc/kernel/Makefile | 2 + arch/openrisc/kernel/jump_label.c | 52 +++++++++++++ arch/openrisc/kernel/patching.c | 78 +++++++++++++++++++ arch/openrisc/kernel/setup.c | 2 + arch/openrisc/mm/init.c | 10 ++- 14 files changed, 251 insertions(+), 16 deletions(-) create mode 100644 arch/openrisc/include/asm/insn-def.h create mode 100644 arch/openrisc/include/asm/jump_label.h create mode 100644 arch/openrisc/include/asm/text-patching.h create mode 100644 arch/openrisc/kernel/jump_label.c create mode 100644 arch/openrisc/kernel/patching.c -- 2.45.2
