root/tools/testing/selftests/powerpc/ptrace/ptrace-tm-spd-gpr.c

DEFINITIONS

1. wait_parent
2. tm_spd_gpr
3. trace_tm_spd_gpr
4. ptrace_tm_spd_gpr
5. main

   1 // SPDX-License-Identifier: GPL-2.0-or-later
   2 /*
   3  * Ptrace test for GPR/FPR registers in TM Suspend context
   4  *
   5  * Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
   6  */
   7 #include "ptrace.h"
   8 #include "ptrace-gpr.h"
   9 #include "tm.h"
  10 
  11 /* Tracer and Tracee Shared Data */
  12 int shm_id;
  13 int *cptr, *pptr;
  14 
  15 float a = FPR_1;
  16 float b = FPR_2;
  17 float c = FPR_3;
  18 float d = FPR_4;
  19 
  20 __attribute__((used)) void wait_parent(void)
  21 {
  22         cptr[2] = 1;
  23         while (!cptr[1])
  24                 asm volatile("" : : : "memory");
  25 }
  26 
  27 void tm_spd_gpr(void)
  28 {
  29         unsigned long gpr_buf[18];
  30         unsigned long result, texasr;
  31         float fpr_buf[32];
  32 
  33         cptr = (int *)shmat(shm_id, NULL, 0);
  34 
  35 trans:
  36         cptr[2] = 0;
  37         asm __volatile__(
  38                 ASM_LOAD_GPR_IMMED(gpr_1)
  39                 ASM_LOAD_FPR_SINGLE_PRECISION(flt_1)
  40 
  41                 "1: ;"
  42                 "tbegin.;"
  43                 "beq 2f;"
  44 
  45                 ASM_LOAD_GPR_IMMED(gpr_2)
  46                 "tsuspend.;"
  47                 ASM_LOAD_GPR_IMMED(gpr_4)
  48                 ASM_LOAD_FPR_SINGLE_PRECISION(flt_4)
  49 
  50                 "bl wait_parent;"
  51                 "tresume.;"
  52                 "tend.;"
  53                 "li 0, 0;"
  54                 "ori %[res], 0, 0;"
  55                 "b 3f;"
  56 
  57                 /* Transaction abort handler */
  58                 "2: ;"
  59                 "li 0, 1;"
  60                 "ori %[res], 0, 0;"
  61                 "mfspr %[texasr], %[sprn_texasr];"
  62 
  63                 "3: ;"
  64                 : [res] "=r" (result), [texasr] "=r" (texasr)
  65                 : [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2), [gpr_4]"i"(GPR_4),
  66                 [sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "b" (&a),
  67                 [flt_4] "b" (&d)
  68                 : "memory", "r5", "r6", "r7",
  69                 "r8", "r9", "r10", "r11", "r12", "r13", "r14", "r15",
  70                 "r16", "r17", "r18", "r19", "r20", "r21", "r22", "r23",
  71                 "r24", "r25", "r26", "r27", "r28", "r29", "r30", "r31"
  72                 );
  73 
  74         if (result) {
  75                 if (!cptr[0])
  76                         goto trans;
  77 
  78                 shmdt((void *)cptr);
  79                 store_gpr(gpr_buf);
  80                 store_fpr_single_precision(fpr_buf);
  81 
  82                 if (validate_gpr(gpr_buf, GPR_3))
  83                         exit(1);
  84 
  85                 if (validate_fpr_float(fpr_buf, c))
  86                         exit(1);
  87                 exit(0);
  88         }
  89         shmdt((void *)cptr);
  90         exit(1);
  91 }
  92 
  93 int trace_tm_spd_gpr(pid_t child)
  94 {
  95         unsigned long gpr[18];
  96         unsigned long fpr[32];
  97 
  98         FAIL_IF(start_trace(child));
  99         FAIL_IF(show_gpr(child, gpr));
 100         FAIL_IF(validate_gpr(gpr, GPR_4));
 101         FAIL_IF(show_fpr(child, fpr));
 102         FAIL_IF(validate_fpr(fpr, FPR_4_REP));
 103         FAIL_IF(show_ckpt_fpr(child, fpr));
 104         FAIL_IF(validate_fpr(fpr, FPR_1_REP));
 105         FAIL_IF(show_ckpt_gpr(child, gpr));
 106         FAIL_IF(validate_gpr(gpr, GPR_1));
 107         FAIL_IF(write_ckpt_gpr(child, GPR_3));
 108         FAIL_IF(write_ckpt_fpr(child, FPR_3_REP));
 109 
 110         pptr[0] = 1;
 111         pptr[1] = 1;
 112         FAIL_IF(stop_trace(child));
 113         return TEST_PASS;
 114 }
 115 
 116 int ptrace_tm_spd_gpr(void)
 117 {
 118         pid_t pid;
 119         int ret, status;
 120 
 121         SKIP_IF(!have_htm());
 122         shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
 123         pid = fork();
 124         if (pid < 0) {
 125                 perror("fork() failed");
 126                 return TEST_FAIL;
 127         }
 128 
 129         if (pid == 0)
 130                 tm_spd_gpr();
 131 
 132         if (pid) {
 133                 pptr = (int *)shmat(shm_id, NULL, 0);
 134                 pptr[0] = 0;
 135                 pptr[1] = 0;
 136 
 137                 while (!pptr[2])
 138                         asm volatile("" : : : "memory");
 139                 ret = trace_tm_spd_gpr(pid);
 140                 if (ret) {
 141                         kill(pid, SIGTERM);
 142                         shmdt((void *)pptr);
 143                         shmctl(shm_id, IPC_RMID, NULL);
 144                         return TEST_FAIL;
 145                 }
 146 
 147                 shmdt((void *)pptr);
 148 
 149                 ret = wait(&status);
 150                 shmctl(shm_id, IPC_RMID, NULL);
 151                 if (ret != pid) {
 152                         printf("Child's exit status not captured\n");
 153                         return TEST_FAIL;
 154                 }
 155 
 156                 return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
 157                         TEST_PASS;
 158         }
 159         return TEST_PASS;
 160 }
 161 
 162 int main(int argc, char *argv[])
 163 {
 164         return test_harness(ptrace_tm_spd_gpr, "ptrace_tm_spd_gpr");
 165 }