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c718a0ba |
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20-Sep-2023 |
Bibo Mao <maobibo@loongson.cn> |
LoongArch: Fix some build warnings with W=1 There are some building warnings when building LoongArch kernel with W=1 as following, this patch fixes them. arch/loongarch/kernel/acpi.c:284:13: warning: no previous prototype for ‘acpi_numa_arch_fixup’ [-Wmissing-prototypes] 284 | void __init acpi_numa_arch_fixup(void) {} | ^~~~~~~~~~~~~~~~~~~~ arch/loongarch/kernel/time.c:32:13: warning: no previous prototype for ‘constant_timer_interrupt’ [-Wmissing-prototypes] 32 | irqreturn_t constant_timer_interrupt(int irq, void *data) | ^~~~~~~~~~~~~~~~~~~~~~~~ arch/loongarch/kernel/traps.c:496:25: warning: no previous prototype for 'do_fpe' [-Wmissing-prototypes] 496 | asmlinkage void noinstr do_fpe(struct pt_regs *regs | ^~~~~~ arch/loongarch/kernel/traps.c:813:22: warning: variable ‘opcode’ set but not used [-Wunused-but-set-variable] 813 | unsigned int opcode; | ^~~~~~ arch/loongarch/kernel/signal.c:895:14: warning: no previous prototype for ‘get_sigframe’ [-Wmissing-prototypes] 895 | void __user *get_sigframe(struct ksignal *ksig, struct pt_regs *regs, | ^~~~~~~~~~~~ arch/loongarch/kernel/syscall.c:21:40: warning: initialized field overwritten [-Woverride-init] 21 | #define __SYSCALL(nr, call) [nr] = (call), | ^ arch/loongarch/kernel/syscall.c:40:14: warning: no previous prototype for ‘do_syscall’ [-Wmissing-prototypes] 40 | void noinstr do_syscall(struct pt_regs *regs) | ^~~~~~~~~~ arch/loongarch/kernel/smp.c:502:17: warning: no previous prototype for ‘start_secondary’ [-Wmissing-prototypes] 502 | asmlinkage void start_secondary(void) | ^~~~~~~~~~~~~~~ arch/loongarch/kernel/process.c:309:15: warning: no previous prototype for ‘arch_align_stack’ [-Wmissing-prototypes] 309 | unsigned long arch_align_stack(unsigned long sp) | ^~~~~~~~~~~~~~~~ arch/loongarch/kernel/topology.c:13:5: warning: no previous prototype for ‘arch_register_cpu’ [-Wmissing-prototypes] 13 | int arch_register_cpu(int cpu) | ^~~~~~~~~~~~~~~~~ arch/loongarch/kernel/topology.c:27:6: warning: no previous prototype for ‘arch_unregister_cpu’ [-Wmissing-prototypes] 27 | void arch_unregister_cpu(int cpu) | ^~~~~~~~~~~~~~~~~~~ arch/loongarch/kernel/module-sections.c:103:5: warning: no previous prototype for ‘module_frob_arch_sections’ [-Wmissing-prototypes] 103 | int module_frob_arch_sections(Elf_Ehdr *ehdr, Elf_Shdr *sechdrs, | ^~~~~~~~~~~~~~~~~~~~~~~~~ arch/loongarch/mm/hugetlbpage.c:56:5: warning: no previous prototype for ‘is_aligned_hugepage_range’ [-Wmissing-prototypes] 56 | int is_aligned_hugepage_range(unsigned long addr, unsigned long len) | ^~~~~~~~~~~~~~~~~~~~~~~~~ Signed-off-by: Bibo Mao <maobibo@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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28ac0a9e |
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10-Dec-2022 |
Qing Zhang <zhangqing@loongson.cn> |
LoongArch: modules/ftrace: Initialize PLT at load time This patch implements ftrace trampolines through plt entry. Tested by forcing ftrace_make_call() to use the module PLT, and then loading up a module after setting up ftrace with: | echo ":mod:<module-name>" > set_ftrace_filter; | echo function > current_tracer; | modprobe <module-name> Since FTRACE_ADDR/FTRACE_REGS_ADDR is only defined when CONFIG_DYNAMIC_ FTRACE is selected, we wrap their usage in module_init_ftrace_plt() with ifdeffery rather than using IS_ENABLED(). Signed-off-by: Qing Zhang <zhangqing@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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9151dde4 |
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10-Dec-2022 |
Huacai Chen <chenhuacai@kernel.org> |
LoongArch: module: Use got/plt section indices for relocations Instead of saving a pointer to the .got, .plt and .plt_idx sections to apply {got,plt}-based relocations, save and use their section indices instead. The mod->arch.{core,init}.{got,plt} pointers were problematic for live- patch because they pointed within temporary section headers (provided by the module loader via info->sechdrs) that would be freed after module load. Since livepatch modules may need to apply relocations post-module- load (for example, to patch a module that is loaded later), using section indices to offset into the section headers (instead of accessing them through a saved pointer) allows livepatch modules on LoongArch to pass in their own copy of the section headers to apply_relocate_add() to apply delayed relocations. The method used is same as commit c8ebf64eab743 ("arm64/module: use plt section indices for relocations"). Signed-off-by: Hongchen Zhang <zhanghongchen@loongson.cn> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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59b3d4a9 |
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12-Oct-2022 |
Xi Ruoyao <xry111@xry111.site> |
LoongArch: Support R_LARCH_GOT_PC_{LO12,HI20} in modules GCC >= 13 and GNU assembler >= 2.40 use these relocations to address external symbols, so we need to add them. Let the module loader emit GOT entries for data symbols so we would be able to handle GOT relocations. The GOT entry is just the data's symbol address. In module.lds, emit a stub .got section for a section header entry. The actual content of the section entry will be filled at runtime by module_ frob_arch_sections(). Tested-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Xi Ruoyao <xry111@xry111.site> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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9bd1e380 |
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12-Oct-2022 |
Xi Ruoyao <xry111@xry111.site> |
LoongArch: Support PC-relative relocations in modules Binutils >= 2.40 uses R_LARCH_B26 instead of R_LARCH_SOP_PUSH_PLT_PCREL, and R_LARCH_PCALA* instead of R_LARCH_SOP_PUSH_PCREL. Handle R_LARCH_B26 and R_LARCH_PCALA* in the module loader. For R_LARCH_ B26, also create a PLT entry as needed. Tested-by: WANG Xuerui <git@xen0n.name> Signed-off-by: Xi Ruoyao <xry111@xry111.site> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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fcdfe9d2 |
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31-May-2022 |
Huacai Chen <chenhuacai@kernel.org> |
LoongArch: Add ELF and module support Add ELF-related definition and module relocation code for basic LoongArch support. Cc: Jessica Yu <jeyu@kernel.org> Reviewed-by: WANG Xuerui <git@xen0n.name> Reviewed-by: Luis Chamberlain <mcgrof@kernel.org> Reviewed-by: Jiaxun Yang <jiaxun.yang@flygoat.com> Signed-off-by: Huacai Chen <chenhuacai@loongson.cn>
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