b7bcda631e
A bunch of code has hard-coded the value for a "nop" instruction, it would be nice to have a #define for it. Signed-off-by: Michael Ellerman <michael@ellerman.id.au> Acked-by: Kumar Gala <galak@kernel.crashing.org> Signed-off-by: Paul Mackerras <paulus@samba.org>
54 lines
1.7 KiB
C
54 lines
1.7 KiB
C
#ifndef _ASM_POWERPC_CODE_PATCHING_H
|
|
#define _ASM_POWERPC_CODE_PATCHING_H
|
|
|
|
/*
|
|
* Copyright 2008, Michael Ellerman, IBM Corporation.
|
|
*
|
|
* 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 <asm/types.h>
|
|
|
|
#define PPC_NOP_INSTR 0x60000000
|
|
|
|
/* Flags for create_branch:
|
|
* "b" == create_branch(addr, target, 0);
|
|
* "ba" == create_branch(addr, target, BRANCH_ABSOLUTE);
|
|
* "bl" == create_branch(addr, target, BRANCH_SET_LINK);
|
|
* "bla" == create_branch(addr, target, BRANCH_ABSOLUTE | BRANCH_SET_LINK);
|
|
*/
|
|
#define BRANCH_SET_LINK 0x1
|
|
#define BRANCH_ABSOLUTE 0x2
|
|
|
|
unsigned int create_branch(const unsigned int *addr,
|
|
unsigned long target, int flags);
|
|
unsigned int create_cond_branch(const unsigned int *addr,
|
|
unsigned long target, int flags);
|
|
void patch_branch(unsigned int *addr, unsigned long target, int flags);
|
|
void patch_instruction(unsigned int *addr, unsigned int instr);
|
|
|
|
int instr_is_relative_branch(unsigned int instr);
|
|
int instr_is_branch_to_addr(const unsigned int *instr, unsigned long addr);
|
|
unsigned long branch_target(const unsigned int *instr);
|
|
unsigned int translate_branch(const unsigned int *dest,
|
|
const unsigned int *src);
|
|
|
|
static inline unsigned long ppc_function_entry(void *func)
|
|
{
|
|
#ifdef CONFIG_PPC64
|
|
/*
|
|
* On PPC64 the function pointer actually points to the function's
|
|
* descriptor. The first entry in the descriptor is the address
|
|
* of the function text.
|
|
*/
|
|
return ((func_descr_t *)func)->entry;
|
|
#else
|
|
return (unsigned long)func;
|
|
#endif
|
|
}
|
|
|
|
#endif /* _ASM_POWERPC_CODE_PATCHING_H */
|