// SPDX-License-Identifier: GPL-2.0
|
#include <linux/compiler.h>
|
|
static struct ins_ops *powerpc__associate_instruction_ops(struct arch *arch, const char *name)
|
{
|
int i;
|
struct ins_ops *ops;
|
|
/*
|
* - Interested only if instruction starts with 'b'.
|
* - Few start with 'b', but aren't branch instructions.
|
*/
|
if (name[0] != 'b' ||
|
!strncmp(name, "bcd", 3) ||
|
!strncmp(name, "brinc", 5) ||
|
!strncmp(name, "bper", 4))
|
return NULL;
|
|
ops = &jump_ops;
|
|
i = strlen(name) - 1;
|
if (i < 0)
|
return NULL;
|
|
/* ignore optional hints at the end of the instructions */
|
if (name[i] == '+' || name[i] == '-')
|
i--;
|
|
if (name[i] == 'l' || (name[i] == 'a' && name[i-1] == 'l')) {
|
/*
|
* if the instruction ends up with 'l' or 'la', then
|
* those are considered 'calls' since they update LR.
|
* ... except for 'bnl' which is branch if not less than
|
* and the absolute form of the same.
|
*/
|
if (strcmp(name, "bnl") && strcmp(name, "bnl+") &&
|
strcmp(name, "bnl-") && strcmp(name, "bnla") &&
|
strcmp(name, "bnla+") && strcmp(name, "bnla-"))
|
ops = &call_ops;
|
}
|
if (name[i] == 'r' && name[i-1] == 'l')
|
/*
|
* instructions ending with 'lr' are considered to be
|
* return instructions
|
*/
|
ops = &ret_ops;
|
|
arch__associate_ins_ops(arch, name, ops);
|
return ops;
|
}
|
|
static int powerpc__annotate_init(struct arch *arch, char *cpuid __maybe_unused)
|
{
|
if (!arch->initialized) {
|
arch->initialized = true;
|
arch->associate_instruction_ops = powerpc__associate_instruction_ops;
|
arch->objdump.comment_char = '#';
|
}
|
|
return 0;
|
}
|
