mirror of
https://github.com/AuxXxilium/linux_dsm_epyc7002.git
synced 2024-11-30 23:26:45 +07:00
7cc45e6432
Impact: add ability to trace modules on 32 bit PowerPC This patch performs the necessary trampoline calls to handle modules with dynamic ftrace on 32 bit PowerPC. Signed-off-by: Steven Rostedt <srostedt@redhat.com>
92 lines
2.3 KiB
C
92 lines
2.3 KiB
C
#ifndef _ASM_POWERPC_MODULE_H
|
|
#define _ASM_POWERPC_MODULE_H
|
|
#ifdef __KERNEL__
|
|
|
|
/*
|
|
* This program is free software; you can redistribute it and/or
|
|
* modify it under the terms of the GNU General Public License
|
|
* as published by the Free Software Foundation; either version
|
|
* 2 of the License, or (at your option) any later version.
|
|
*/
|
|
|
|
#include <linux/list.h>
|
|
#include <asm/bug.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 furthur 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? */
|
|
#ifdef CONFIG_DYNAMIC_FTRACE
|
|
unsigned long toc;
|
|
unsigned long tramp;
|
|
#endif
|
|
|
|
#else /* powerpc64 */
|
|
/* Indices of PLT sections within module. */
|
|
unsigned int core_plt_section;
|
|
unsigned int init_plt_section;
|
|
#ifdef CONFIG_DYNAMIC_FTRACE
|
|
unsigned long tramp;
|
|
#endif
|
|
#endif /* powerpc64 */
|
|
|
|
/* 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__
|
|
# define Elf_Shdr Elf64_Shdr
|
|
# define Elf_Sym Elf64_Sym
|
|
# define Elf_Ehdr Elf64_Ehdr
|
|
# ifdef MODULE
|
|
asm(".section .stubs,\"ax\",@nobits; .align 3; .previous");
|
|
# endif
|
|
#else
|
|
# define Elf_Shdr Elf32_Shdr
|
|
# define Elf_Sym Elf32_Sym
|
|
# define Elf_Ehdr Elf32_Ehdr
|
|
# 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 */
|
|
#endif
|
|
|
|
|
|
struct exception_table_entry;
|
|
void sort_ex_table(struct exception_table_entry *start,
|
|
struct exception_table_entry *finish);
|
|
|
|
#endif /* __KERNEL__ */
|
|
#endif /* _ASM_POWERPC_MODULE_H */
|