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// 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;
}
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