/*
* Ptrace test TM SPR registers
*
* Copyright (C) 2015 Anshuman Khandual, IBM Corporation.
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version
* 2 of the License, or (at your option) any later version.
*/
#include "ptrace.h"
#include "tm.h"
/* Tracee and tracer shared data */
struct shared {
int flag;
struct tm_spr_regs regs;
};
unsigned long tfhar;
int shm_id;
struct shared *cptr, *pptr;
int shm_id1;
int *cptr1, *pptr1;
#define TM_KVM_SCHED 0xe0000001ac000001
int validate_tm_spr(struct tm_spr_regs *regs)
{
FAIL_IF(regs->tm_tfhar != tfhar);
FAIL_IF((regs->tm_texasr == TM_KVM_SCHED) && (regs->tm_tfiar != 0));
return TEST_PASS;
}
void tm_spr(void)
{
unsigned long result, texasr;
int ret;
cptr = (struct shared *)shmat(shm_id, NULL, 0);
cptr1 = (int *)shmat(shm_id1, NULL, 0);
trans:
cptr1[0] = 0;
asm __volatile__(
"1: ;"
/* TM failover handler should follow "tbegin.;" */
"mflr 31;"
"bl 4f;" /* $ = TFHAR - 12 */
"4: ;"
"mflr %[tfhar];"
"mtlr 31;"
"tbegin.;"
"beq 2f;"
"tsuspend.;"
"li 8, 1;"
"sth 8, 0(%[cptr1]);"
"tresume.;"
"b .;"
"tend.;"
"li 0, 0;"
"ori %[res], 0, 0;"
"b 3f;"
"2: ;"
"li 0, 1;"
"ori %[res], 0, 0;"
"mfspr %[texasr], %[sprn_texasr];"
"3: ;"
: [tfhar] "=r" (tfhar), [res] "=r" (result),
[texasr] "=r" (texasr), [cptr1] "=r" (cptr1)
: [sprn_texasr] "i" (SPRN_TEXASR)
: "memory", "r0", "r1", "r2", "r3", "r4",
"r8", "r9", "r10", "r11", "r31"
);
/* There are 2 32bit instructions before tbegin. */
tfhar += 12;
if (result) {
if (!cptr->flag)
goto trans;
ret = validate_tm_spr((struct tm_spr_regs *)&cptr->regs);
shmdt((void *)cptr);
shmdt((void *)cptr1);
if (ret)
exit(1);
exit(0);
}
shmdt((void *)cptr);
shmdt((void *)cptr1);
exit(1);
}
int trace_tm_spr(pid_t child)
{
FAIL_IF(start_trace(child));
FAIL_IF(show_tm_spr(child, (struct tm_spr_regs *)&pptr->regs));
printf("TFHAR: %lx TEXASR: %lx TFIAR: %lx\n", pptr->regs.tm_tfhar,
pptr->regs.tm_texasr, pptr->regs.tm_tfiar);
pptr->flag = 1;
FAIL_IF(stop_trace(child));
return TEST_PASS;
}
int ptrace_tm_spr(void)
{
pid_t pid;
int ret, status;
SKIP_IF(!have_htm());
shm_id = shmget(IPC_PRIVATE, sizeof(struct shared), 0777|IPC_CREAT);
shm_id1 = shmget(IPC_PRIVATE, sizeof(int), 0777|IPC_CREAT);
pid = fork();
if (pid < 0) {
perror("fork() failed");
return TEST_FAIL;
}
if (pid == 0)
tm_spr();
if (pid) {
pptr = (struct shared *)shmat(shm_id, NULL, 0);
pptr1 = (int *)shmat(shm_id1, NULL, 0);
while (!pptr1[0])
asm volatile("" : : : "memory");
ret = trace_tm_spr(pid);
if (ret) {
kill(pid, SIGKILL);
shmdt((void *)pptr);
shmdt((void *)pptr1);
shmctl(shm_id, IPC_RMID, NULL);
shmctl(shm_id1, IPC_RMID, NULL);
return TEST_FAIL;
}
shmdt((void *)pptr);
shmdt((void *)pptr1);
ret = wait(&status);
shmctl(shm_id, IPC_RMID, NULL);
shmctl(shm_id1, 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_spr, "ptrace_tm_spr");
}
41:03 -0500'>2017-02-14| bridge: fdb: converge fdb_delete_by functions into one | Nikolay Aleksandrov | 1 | -47/+15 |
| 2017-02-14 | bridge: fdb: add proper lock checks in searching functions | Nikolay Aleksandrov | 2 | -0/+13 |
| 2017-02-14 | bridge: fdb: converge fdb searching functions into one | Nikolay Aleksandrov | 4 | -70/+54 |
| 2017-02-14 | sched: Fix accidental removal of errout goto | Jiri Pirko | 1 | -0/+1 |
| 2017-02-13 | net: busy-poll: remove LL_FLUSH_FAILED and LL_FLUSH_BUSY | Eric Dumazet | 1 | -3/+0 |
| 2017-02-12 | Merge git://git.kernel.org/pub/scm/linux/kernel/git/pablo/nf-next | David S. Miller | 11 | -112/+778 |
| 2017-02-12 | netfilter: nf_tables: honor NFT_SET_OBJECT in set backend selection | Pablo Neira Ayuso | 3 | -3/+4 |
| 2017-02-12 | netfilter: nf_tables: add NFTA_RULE_ID attribute | Pablo Neira Ayuso | 1 | -0/+26 |
| 2017-02-12 | netfilter: nf_tables: add check_genid to the nfnetlink subsystem | Pablo Neira Ayuso | 1 | -0/+6 |
| 2017-02-12 | netfilter: nfnetlink: allow to check for generation ID | Pablo Neira Ayuso | 1 | -4/+27 |
| 2017-02-12 | netfilter: nfnetlink: add nfnetlink_rcv_skb_batch() | Pablo Neira Ayuso | 1 | -23/+28 |
| 2017-02-12 | netfilter: nfnetlink: get rid of u_intX_t types | Pablo Neira Ayuso | 1 | -8/+8 |
| 2017-02-12 | netfilter: nf_ct_expect: nf_ct_expect_insert() returns void | Gao Feng | 1 | -5/+3 |
| 2017-02-12 | netfilter: nf_ct_sip: Use mod_timer_pending() | Gao Feng | 1 | -7/+5 |
| 2017-02-11 | net_sched: fix error recovery at qdisc creation | Eric Dumazet | 5 | -23/+19 |
| 2017-02-11 | net: rename dst_neigh_output back to neigh_output | Julian Anastasov | 2 | -2/+2 |
| 2017-02-11 | Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net | David S. Miller |