86 lines
2.2 KiB
C
86 lines
2.2 KiB
C
|
/* SPDX-License-Identifier: GPL-2.0-or-later */
|
||
|
|
#ifndef _ASM_POWERPC_MODULE_H
|
||
|
|
#define _ASM_POWERPC_MODULE_H
|
||
|
|
#ifdef __KERNEL__
|
||
|
|
|
||
|
|
#include <linux/list.h>
|
||
|
|
#include <asm/bug.h>
|
||
|
|
#include <asm-generic/module.h>
|
||
|
|
|
||
|
|
#ifndef __powerpc64__
|
||
|
|
/*
|
||
|
|
* Thanks to Paul M for explaining this.
|
||
|
|
*
|
||
|
|
* PPC can only do rel jumps += 32MB, and often the kernel and other
|
||
|
|
* modules are further away than this. So, we jump to a table of
|
||
|
|
* trampolines attached to the module (the Procedure Linkage Table)
|
||
|
|
* whenever that happens.
|
||
|
|
*/
|
||
|
|
|
||
|
|
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 toc_section; /* What section is the TOC? */
|
||
|
|
bool toc_fixed; /* Have we fixed up .TOC.? */
|
||
|
|
|
||
|
|
/* For module function descriptor dereference */
|
||
|
|
unsigned long start_opd;
|
||
|
|
unsigned long end_opd;
|
||
|
|
#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;
|
||
|
|
#endif
|
||
|
|
|
||
|
|
/* List of BUG addresses, source line numbers and filenames */
|
||
|
|
struct list_head bug_list;
|
||
|
|
struct bug_entry *bug_table;
|
||
|
|
unsigned int num_bugs;
|
||
|
|
};
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Select ELF headers.
|
||
|
|
* Make empty section for module_frob_arch_sections to expand.
|
||
|
|
*/
|
||
|
|
|
||
|
|
#ifdef __powerpc64__
|
||
|
|
# ifdef MODULE
|
||
|
|
asm(".section .stubs,\"ax\",@nobits; .align 3; .previous");
|
||
|
|
# 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
|
||
|
|
# ifdef MODULE
|
||
|
|
asm(".section .ftrace.tramp,\"ax\",@nobits; .align 3; .previous");
|
||
|
|
# endif /* MODULE */
|
||
|
|
|
||
|
|
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 */
|