arch/powerpc/include/asm/module.h

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

File Facts

System
Linux kernel
Corpus path
arch/powerpc/include/asm/module.h
Extension
.h
Size
2488 bytes
Lines
93
Domain
Architecture Layer
Bucket
arch/powerpc
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 ppc_plt_entry {
	/* 16 byte jump instruction sequence (4 instructions) */
	unsigned int jump[4];
};
#endif	/* __powerpc64__ */


struct mod_arch_specific {
#ifdef __powerpc64__
	unsigned int stubs_section;	/* Index of stubs section in module */
	unsigned int stub_count;	/* Number of stubs used */
#ifdef CONFIG_PPC_KERNEL_PCREL
	unsigned int got_section;	/* What section is the GOT? */
	unsigned int pcpu_section;	/* .data..percpu section */
#else
	unsigned int toc_section;	/* What section is the TOC? */
	bool toc_fixed;			/* Have we fixed up .TOC.? */
#endif

#ifdef CONFIG_PPC64_ELF_ABI_V1
	/* For module function descriptor dereference */
	unsigned long start_opd;
	unsigned long end_opd;
#endif
#else /* powerpc64 */
	/* Indices of PLT sections within module. */
	unsigned int core_plt_section;
	unsigned int init_plt_section;
#endif /* powerpc64 */

#ifdef CONFIG_DYNAMIC_FTRACE
	unsigned long tramp;
	unsigned long tramp_regs;
#ifdef CONFIG_PPC_FTRACE_OUT_OF_LINE
	struct ftrace_ool_stub *ool_stubs;
	unsigned int ool_stub_count;
	unsigned int ool_stub_index;
#endif
#endif
};

/*
 * Select ELF headers.
 * Make empty sections for module_frob_arch_sections to expand.
 */

#ifdef __powerpc64__
#    ifdef MODULE
	asm(".section .stubs,\"ax\",@nobits; .align 3; .previous");
#        ifdef CONFIG_PPC_KERNEL_PCREL
	    asm(".section .mygot,\"a\",@nobits; .align 3; .previous");
#        endif
#    endif
#else
#    ifdef MODULE
	asm(".section .plt,\"ax\",@nobits; .align 3; .previous");
	asm(".section .init.plt,\"ax\",@nobits; .align 3; .previous");
#    endif	/* MODULE */
#endif

#ifdef CONFIG_DYNAMIC_FTRACE
int module_trampoline_target(struct module *mod, unsigned long trampoline,
			     unsigned long *target);
int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs);
#else
static inline int module_finalize_ftrace(struct module *mod, const Elf_Shdr *sechdrs)
{
	return 0;
}
#endif

#endif /* __KERNEL__ */
#endif	/* _ASM_POWERPC_MODULE_H */

Annotation

Implementation Notes