1 // SPDX-License-Identifier: GPL-2.0
6 #include "../../perf.h"
7 #include "../../util/util.h"
8 #include "../../util/perf_regs.h"
9 #include "../../util/debug.h"
11 #include <linux/kernel.h>
13 const struct sample_reg sample_reg_masks[] = {
14 SMPL_REG(r0, PERF_REG_POWERPC_R0),
15 SMPL_REG(r1, PERF_REG_POWERPC_R1),
16 SMPL_REG(r2, PERF_REG_POWERPC_R2),
17 SMPL_REG(r3, PERF_REG_POWERPC_R3),
18 SMPL_REG(r4, PERF_REG_POWERPC_R4),
19 SMPL_REG(r5, PERF_REG_POWERPC_R5),
20 SMPL_REG(r6, PERF_REG_POWERPC_R6),
21 SMPL_REG(r7, PERF_REG_POWERPC_R7),
22 SMPL_REG(r8, PERF_REG_POWERPC_R8),
23 SMPL_REG(r9, PERF_REG_POWERPC_R9),
24 SMPL_REG(r10, PERF_REG_POWERPC_R10),
25 SMPL_REG(r11, PERF_REG_POWERPC_R11),
26 SMPL_REG(r12, PERF_REG_POWERPC_R12),
27 SMPL_REG(r13, PERF_REG_POWERPC_R13),
28 SMPL_REG(r14, PERF_REG_POWERPC_R14),
29 SMPL_REG(r15, PERF_REG_POWERPC_R15),
30 SMPL_REG(r16, PERF_REG_POWERPC_R16),
31 SMPL_REG(r17, PERF_REG_POWERPC_R17),
32 SMPL_REG(r18, PERF_REG_POWERPC_R18),
33 SMPL_REG(r19, PERF_REG_POWERPC_R19),
34 SMPL_REG(r20, PERF_REG_POWERPC_R20),
35 SMPL_REG(r21, PERF_REG_POWERPC_R21),
36 SMPL_REG(r22, PERF_REG_POWERPC_R22),
37 SMPL_REG(r23, PERF_REG_POWERPC_R23),
38 SMPL_REG(r24, PERF_REG_POWERPC_R24),
39 SMPL_REG(r25, PERF_REG_POWERPC_R25),
40 SMPL_REG(r26, PERF_REG_POWERPC_R26),
41 SMPL_REG(r27, PERF_REG_POWERPC_R27),
42 SMPL_REG(r28, PERF_REG_POWERPC_R28),
43 SMPL_REG(r29, PERF_REG_POWERPC_R29),
44 SMPL_REG(r30, PERF_REG_POWERPC_R30),
45 SMPL_REG(r31, PERF_REG_POWERPC_R31),
46 SMPL_REG(nip, PERF_REG_POWERPC_NIP),
47 SMPL_REG(msr, PERF_REG_POWERPC_MSR),
48 SMPL_REG(orig_r3, PERF_REG_POWERPC_ORIG_R3),
49 SMPL_REG(ctr, PERF_REG_POWERPC_CTR),
50 SMPL_REG(link, PERF_REG_POWERPC_LINK),
51 SMPL_REG(xer, PERF_REG_POWERPC_XER),
52 SMPL_REG(ccr, PERF_REG_POWERPC_CCR),
53 SMPL_REG(softe, PERF_REG_POWERPC_SOFTE),
54 SMPL_REG(trap, PERF_REG_POWERPC_TRAP),
55 SMPL_REG(dar, PERF_REG_POWERPC_DAR),
56 SMPL_REG(dsisr, PERF_REG_POWERPC_DSISR),
57 SMPL_REG(sier, PERF_REG_POWERPC_SIER),
58 SMPL_REG(mmcra, PERF_REG_POWERPC_MMCRA),
63 #define SDT_OP_REGEX1 "^(%r)?([1-2]?[0-9]|3[0-1])$"
65 /* -NUM(REG) or NUM(REG) or -NUM(%rREG) or NUM(%rREG) */
66 #define SDT_OP_REGEX2 "^(\\-)?([0-9]+)\\((%r)?([1-2]?[0-9]|3[0-1])\\)$"
68 static regex_t sdt_op_regex1, sdt_op_regex2;
70 static int sdt_init_op_regex(void)
72 static int initialized;
78 ret = regcomp(&sdt_op_regex1, SDT_OP_REGEX1, REG_EXTENDED);
82 ret = regcomp(&sdt_op_regex2, SDT_OP_REGEX2, REG_EXTENDED);
90 regfree(&sdt_op_regex1);
92 pr_debug4("Regex compilation error.\n");
97 * Parse OP and convert it into uprobe format, which is, +/-NUM(%gprREG).
98 * Possible variants of OP are:
100 * -------------------------
103 * NUM(%rREG) 48(%r18)
104 * -NUM(%rREG) -48(%r18)
110 * SDT marker arguments on Powerpc uses %rREG form with -mregnames flag
111 * and REG form with -mno-regnames. Here REG is general purpose register,
112 * which is in 0 to 31 range.
114 int arch_sdt_arg_parse_op(char *old_op, char **new_op)
120 /* Constant argument. Uprobe does not support it */
121 if (old_op[0] == 'i') {
122 pr_debug4("Skipping unsupported SDT argument: %s\n", old_op);
126 ret = sdt_init_op_regex();
130 if (!regexec(&sdt_op_regex1, old_op, 3, rm, 0)) {
131 /* REG or %rREG --> %gprREG */
133 new_len = 5; /* % g p r NULL */
134 new_len += (int)(rm[2].rm_eo - rm[2].rm_so);
136 *new_op = zalloc(new_len);
140 scnprintf(*new_op, new_len, "%%gpr%.*s",
141 (int)(rm[2].rm_eo - rm[2].rm_so), old_op + rm[2].rm_so);
142 } else if (!regexec(&sdt_op_regex2, old_op, 5, rm, 0)) {
144 * -NUM(REG) or NUM(REG) or -NUM(%rREG) or NUM(%rREG) -->
147 prefix = (rm[1].rm_so == -1) ? '+' : '-';
149 new_len = 8; /* +/- ( % g p r ) NULL */
150 new_len += (int)(rm[2].rm_eo - rm[2].rm_so);
151 new_len += (int)(rm[4].rm_eo - rm[4].rm_so);
153 *new_op = zalloc(new_len);
157 scnprintf(*new_op, new_len, "%c%.*s(%%gpr%.*s)", prefix,
158 (int)(rm[2].rm_eo - rm[2].rm_so), old_op + rm[2].rm_so,
159 (int)(rm[4].rm_eo - rm[4].rm_so), old_op + rm[4].rm_so);
161 pr_debug4("Skipping unsupported SDT argument: %s\n", old_op);
165 return SDT_ARG_VALID;