arch/loongarch/include/asm/module.h

Source file repositories/reference/linux-study-clean/arch/loongarch/include/asm/module.h

File Facts

System
Linux kernel
Corpus path
arch/loongarch/include/asm/module.h
Extension
.h
Size
3010 bytes
Lines
127
Domain
Architecture Layer
Bucket
arch/loongarch
Inferred role
Architecture Layer: implementation source
Status
source implementation candidate

Why This File Exists

CPU and platform-specific kernel glue: boot entry, traps, syscall entry, interrupts, page tables, context switch, and low-level barriers.

Dependency Surface

Detected Declarations

Annotated Snippet

struct mod_section {
	int shndx;
	int num_entries;
	int max_entries;
};

struct mod_arch_specific {
	struct mod_section got;
	struct mod_section plt;
	struct mod_section plt_idx;

#ifdef CONFIG_UNWINDER_ORC
	unsigned int num_orcs;
	int *orc_unwind_ip;
	struct orc_entry *orc_unwind;
#endif

	/* For CONFIG_DYNAMIC_FTRACE */
	struct plt_entry *ftrace_trampolines;
};

struct got_entry {
	Elf_Addr symbol_addr;
};

struct plt_entry {
	u32 inst_lu12iw;
#ifdef CONFIG_64BIT
	u32 inst_lu32id;
	u32 inst_lu52id;
#endif
	u32 inst_jirl;
};

struct plt_idx_entry {
	Elf_Addr symbol_addr;
};

Elf_Addr module_emit_got_entry(struct module *mod, Elf_Shdr *sechdrs, Elf_Addr val);
Elf_Addr module_emit_plt_entry(struct module *mod, Elf_Shdr *sechdrs, Elf_Addr val);

static inline struct got_entry emit_got_entry(Elf_Addr val)
{
	return (struct got_entry) { val };
}

static inline struct plt_entry emit_plt_entry(unsigned long val)
{
#ifdef CONFIG_32BIT
	u32 lu12iw, jirl;

	lu12iw = larch_insn_gen_lu12iw(LOONGARCH_GPR_T1, ADDR_IMM(val, LU12IW));
	jirl = larch_insn_gen_jirl(0, LOONGARCH_GPR_T1, ADDR_IMM(val, ORI));

	return (struct plt_entry) { lu12iw, jirl };
#else
	u32 lu12iw, lu32id, lu52id, jirl;

	lu12iw = larch_insn_gen_lu12iw(LOONGARCH_GPR_T1, ADDR_IMM(val, LU12IW));
	lu32id = larch_insn_gen_lu32id(LOONGARCH_GPR_T1, ADDR_IMM(val, LU32ID));
	lu52id = larch_insn_gen_lu52id(LOONGARCH_GPR_T1, LOONGARCH_GPR_T1, ADDR_IMM(val, LU52ID));
	jirl = larch_insn_gen_jirl(0, LOONGARCH_GPR_T1, ADDR_IMM(val, ORI));

	return (struct plt_entry) { lu12iw, lu32id, lu52id, jirl };
#endif
}

static inline struct plt_idx_entry emit_plt_idx_entry(unsigned long val)
{
	return (struct plt_idx_entry) { val };
}

static inline int get_plt_idx(unsigned long val, Elf_Shdr *sechdrs, const struct mod_section *sec)
{
	int i;
	struct plt_idx_entry *plt_idx = (struct plt_idx_entry *)sechdrs[sec->shndx].sh_addr;

	for (i = 0; i < sec->num_entries; i++) {
		if (plt_idx[i].symbol_addr == val)
			return i;
	}

	return -1;
}

static inline struct plt_entry *get_plt_entry(unsigned long val,
					      Elf_Shdr *sechdrs,
					      const struct mod_section *sec_plt,
					      const struct mod_section *sec_plt_idx)
{

Annotation

Implementation Notes