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// SPDX-License-Identifier: GPL-2.0-or-later
/*
* Ptrace test for VMX/VSX registers in the TM Suspend context
*
* Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
*/
#include "ptrace.h"
#include "tm.h"
#include "ptrace-vsx.h"
int shm_id;
int *cptr, *pptr;
unsigned long fp_load[VEC_MAX];
unsigned long fp_load_new[VEC_MAX];
unsigned long fp_store[VEC_MAX];
unsigned long fp_load_ckpt[VEC_MAX];
unsigned long fp_load_ckpt_new[VEC_MAX];
__attribute__((used)) void load_vsx(void)
{
loadvsx(fp_load, 0);
}
__attribute__((used)) void load_vsx_new(void)
{
loadvsx(fp_load_new, 0);
}
__attribute__((used)) void load_vsx_ckpt(void)
{
loadvsx(fp_load_ckpt, 0);
}
__attribute__((used)) void wait_parent(void)
{
cptr[2] = 1;
while (!cptr[1])
asm volatile("" : : : "memory");
}
void tm_spd_vsx(void)
{
unsigned long result, texasr;
int ret;
cptr = (int *)shmat(shm_id, NULL, 0);
trans:
cptr[2] = 0;
asm __volatile__(
"bl load_vsx_ckpt;"
"1: ;"
"tbegin.;"
"beq 2f;"
"bl load_vsx_new;"
"tsuspend.;"
"bl load_vsx;"
"bl wait_parent;"
"tresume.;"
"tend.;"
"li 0, 0;"
"ori %[res], 0, 0;"
"b 3f;"
"2: ;"
"li 0, 1;"
"ori %[res], 0, 0;"
"mfspr %[texasr], %[sprn_texasr];"
"3: ;"
: [res] "=r" (result), [texasr] "=r" (texasr)
: [sprn_texasr] "i" (SPRN_TEXASR)
: "memory", "r0", "r3", "r4",
"r7", "r8", "r9", "r10", "r11", "lr"
);
if (result) {
if (!cptr[0])
goto trans;
shmdt((void *)cptr);
storevsx(fp_store, 0);
ret = compare_vsx_vmx(fp_store, fp_load_ckpt_new);
if (ret)
exit(1);
exit(0);
}
shmdt((void *)cptr);
exit(1);
}
int trace_tm_spd_vsx(pid_t child)
{
unsigned long vsx[VSX_MAX];
unsigned long vmx[VMX_MAX + 2][2];
FAIL_IF(start_trace(child));
FAIL_IF(show_vsx(child, vsx));
FAIL_IF(validate_vsx(vsx, fp_load));
FAIL_IF(show_vmx(child, vmx));
FAIL_IF(validate_vmx(vmx, fp_load));
FAIL_IF(show_vsx_ckpt(child, vsx));
FAIL_IF(validate_vsx(vsx, fp_load_ckpt));
FAIL_IF(show_vmx_ckpt(child, vmx));
FAIL_IF(validate_vmx(vmx, fp_load_ckpt));
memset(vsx, 0, sizeof(vsx));
memset(vmx, 0, sizeof(vmx));
load_vsx_vmx(fp_load_ckpt_new, vsx, vmx);
FAIL_IF(write_vsx_ckpt(child, vsx));
FAIL_IF(write_vmx_ckpt(child, vmx));
pptr[0] = 1;
pptr[1] = 1;
FAIL_IF(stop_trace(child));
return TEST_PASS;
}
int ptrace_tm_spd_vsx(void)
{
pid_t pid;
int ret, status, i;
SKIP_IF_MSG(!have_htm(), "Don't have transactional memory");
SKIP_IF_MSG(htm_is_synthetic(), "Transactional memory is synthetic");
shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
for (i = 0; i < 128; i++) {
fp_load[i] = 1 + rand();
fp_load_new[i] = 1 + 2 * rand();
fp_load_ckpt[i] = 1 + 3 * rand();
fp_load_ckpt_new[i] = 1 + 4 * rand();
}
pid = fork();
if (pid < 0) {
perror("fork() failed");
return TEST_FAIL;
}
if (pid == 0)
tm_spd_vsx();
if (pid) {
pptr = (int *)shmat(shm_id, NULL, 0);
while (!pptr[2])
asm volatile("" : : : "memory");
ret = trace_tm_spd_vsx(pid);
if (ret) {
kill(pid, SIGKILL);
shmdt((void *)pptr);
shmctl(shm_id, IPC_RMID, NULL);
return TEST_FAIL;
}
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_tm_spd_vsx, "ptrace_tm_spd_vsx");
}
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