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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Ptrace test for GPR/FPR registers
*
* Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
*/
#include "ptrace.h"
#include "ptrace-gpr.h"
#include "reg.h"
/* Tracer and Tracee Shared Data */
int shm_id;
int *cptr, *pptr;
float a = FPR_1;
float b = FPR_2;
float c = FPR_3;
void gpr(void)
{
unsigned long gpr_buf[18];
float fpr_buf[32];
cptr = (int *)shmat(shm_id, NULL, 0);
asm __volatile__(
ASM_LOAD_GPR_IMMED(gpr_1)
ASM_LOAD_FPR_SINGLE_PRECISION(flt_1)
:
: [gpr_1]"i"(GPR_1), [flt_1] "b" (&a)
: "memory", "r6", "r7", "r8", "r9", "r10",
"r11", "r12", "r13", "r14", "r15", "r16", "r17",
"r18", "r19", "r20", "r21", "r22", "r23", "r24",
"r25", "r26", "r27", "r28", "r29", "r30", "r31"
);
cptr[1] = 1;
while (!cptr[0])
asm volatile("" : : : "memory");
shmdt((void *)cptr);
store_gpr(gpr_buf);
store_fpr_single_precision(fpr_buf);
if (validate_gpr(gpr_buf, GPR_3))
exit(1);
if (validate_fpr_float(fpr_buf, c))
exit(1);
exit(0);
}
int trace_gpr(pid_t child)
{
unsigned long gpr[18];
unsigned long fpr[32];
FAIL_IF(start_trace(child));
FAIL_IF(show_gpr(child, gpr));
FAIL_IF(validate_gpr(gpr, GPR_1));
FAIL_IF(show_fpr(child, fpr));
FAIL_IF(validate_fpr(fpr, FPR_1_REP));
FAIL_IF(write_gpr(child, GPR_3));
FAIL_IF(write_fpr(child, FPR_3_REP));
FAIL_IF(stop_trace(child));
return TEST_PASS;
}
int ptrace_gpr(void)
{
pid_t pid;
int ret, status;
shm_id = shmget(IPC_PRIVATE, sizeof(int) * 2, 0777|IPC_CREAT);
pid = fork();
if (pid < 0) {
perror("fork() failed");
return TEST_FAIL;
}
if (pid == 0)
gpr();
if (pid) {
pptr = (int *)shmat(shm_id, NULL, 0);
while (!pptr[1])
asm volatile("" : : : "memory");
ret = trace_gpr(pid);
if (ret) {
kill(pid, SIGTERM);
shmdt((void *)pptr);
shmctl(shm_id, IPC_RMID, NULL);
return TEST_FAIL;
}
pptr[0] = 1;
shmdt((void *)pptr);
ret = wait(&status);
shmctl(shm_id, IPC_RMID, NULL);
if (ret != pid) {
printf("Child's exit status not captured\n");
return TEST_FAIL;
}
return (WIFEXITED(status) && WEXITSTATUS(status)) ? TEST_FAIL :
TEST_PASS;
}
return TEST_PASS;
}
int main(int argc, char *argv[])
{
return test_harness(ptrace_gpr, "ptrace_gpr");
}
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