Commit 36b08b43 authored by Christophe Leroy's avatar Christophe Leroy Committed by Michael Ellerman
Browse files

powerpc: add modify_instruction() and modify_instruction_site() 



Add two helpers to avoid hardcoding of instructions modifications.

Signed-off-by: default avatarChristophe Leroy <christophe.leroy@c-s.fr>
Signed-off-by: default avatarMichael Ellerman <mpe@ellerman.id.au>
parent 45090c26

arch/powerpc/include/asm/code-patching.h

+11 −0
Original line number Diff line number Diff line
@@ -49,6 +49,17 @@ static inline int patch_branch_site(s32 *site, unsigned long target, int flags) 
	return patch_branch((unsigned int *)patch_site_addr(site), target, flags);

}



static inline int modify_instruction(unsigned int *addr, unsigned int clr,

				     unsigned int set)

{

	return patch_instruction(addr, (*addr & ~clr) | set);

}



static inline int modify_instruction_site(s32 *site, unsigned int clr, unsigned int set)

{

	return modify_instruction((unsigned int *)patch_site_addr(site), clr, set);

}



int instr_is_relative_branch(unsigned int instr);

int instr_is_relative_link_branch(unsigned int instr);

int instr_is_branch_to_addr(const unsigned int *instr, unsigned long addr);

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