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powerpc: Add new code patching routines

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This commit adds some new routines for patching code, which will be used
in a following commit.

Signed-off-by: Michael Ellerman <michael@ellerman.id.au>
Signed-off-by: Paul Mackerras <paulus@samba.org>
This commit is contained in:
Michael Ellerman 2008-06-24 11:32:29 +10:00 • committed by Paul Mackerras
commit 411781a290
2 changed files with 115 additions and 0 deletions
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8
include/asm-powerpc/code-patching.h
View file

@ -23,9 +23,17 @@
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