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