/*
 * Ptrace test for GPR/FPR registers in TM Suspend context
 *
 * 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 "ptrace-gpr.h"
#include "tm.h"

/* Tracer and Tracee Shared Data */
int shm_id;
int *cptr, *pptr;

float a = FPR_1;
float b = FPR_2;
float c = FPR_3;
float d = FPR_4;

__attribute__((used)) void wait_parent(void)
{
	cptr[2] = 1;
	while (!cptr[1])
		asm volatile("" : : : "memory");
}

void tm_spd_gpr(void)
{
	unsigned long gpr_buf[18];
	unsigned long result, texasr;
	float fpr_buf[32];

	cptr = (int *)shmat(shm_id, NULL, 0);

trans:
	cptr[2] = 0;
	asm __volatile__(
		ASM_LOAD_GPR_IMMED(gpr_1)
		ASM_LOAD_FPR_SINGLE_PRECISION(flt_1)

		"1: ;"
		"tbegin.;"
		"beq 2f;"

		ASM_LOAD_GPR_IMMED(gpr_2)
		"tsuspend.;"
		ASM_LOAD_GPR_IMMED(gpr_4)
		ASM_LOAD_FPR_SINGLE_PRECISION(flt_4)

		"bl wait_parent;"
		"tresume.;"
		"tend.;"
		"li 0, 0;"
		"ori %[res], 0, 0;"
		"b 3f;"

		/* Transaction abort handler */
		"2: ;"
		"li 0, 1;"
		"ori %[res], 0, 0;"
		"mfspr %[texasr], %[sprn_texasr];"

		"3: ;"
		: [res] "=r" (result), [texasr] "=r" (texasr)
		: [gpr_1]"i"(GPR_1), [gpr_2]"i"(GPR_2), [gpr_4]"i"(GPR_4),
		[sprn_texasr] "i" (SPRN_TEXASR), [flt_1] "r" (&a),
		[flt_2] "r" (&b), [flt_4] "r" (&d)
		: "memory", "r5", "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"
		);

	if (result) {
		if (!cptr[0])
			goto trans;

		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);
	}
	shmdt((void *)cptr);
	exit(1);
}

int trace_tm_spd_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_4));
	FAIL_IF(show_fpr(child, fpr));
	FAIL_IF(validate_fpr(fpr, FPR_4_REP));
	FAIL_IF(show_ckpt_fpr(child, fpr));
	FAIL_IF(validate_fpr(fpr, FPR_1_REP));
	FAIL_IF(show_ckpt_gpr(child, gpr));
	FAIL_IF(validate_gpr(gpr, GPR_1));
	FAIL_IF(write_ckpt_gpr(child, GPR_3));
	FAIL_IF(write_ckpt_fpr(child, FPR_3_REP));

	pptr[0] = 1;
	pptr[1] = 1;
	FAIL_IF(stop_trace(child));
	return TEST_PASS;
}

int ptrace_tm_spd_gpr(void)
{
	pid_t pid;
	int ret, status;

	SKIP_IF(!have_htm());
	shm_id = shmget(IPC_PRIVATE, sizeof(int) * 3, 0777|IPC_CREAT);
	pid = fork();
	if (pid < 0) {
		perror("fork() failed");
		return TEST_FAIL;
	}

	if (pid == 0)
		tm_spd_gpr();

	if (pid) {
		pptr = (int *)shmat(shm_id, NULL, 0);
		pptr[0] = 0;
		pptr[1] = 0;

		while (!pptr[2])
			asm volatile("" : : : "memory");
		ret = trace_tm_spd_gpr(pid);
		if (ret) {
			kill(pid, SIGTERM);
			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_gpr, "ptrace_tm_spd_gpr");
}
<option value='6'>6</option><option value='7'>7</option><option value='8'>8</option><option value='9'>9</option><option value='10'>10</option><option value='15'>15</option><option value='20'>20</option><option value='25'>25</option><option value='30'>30</option><option value='35'>35</option><option value='40'>40</option></select></td></tr><tr><td class='label'>space:</td><td class='ctrl'><select name='ignorews' onchange='this.form.submit();'><option value='0' selected='selected'>include</option><option value='1'>ignore</option></select></td></tr><tr><td class='label'>mode:</td><td class='ctrl'><select name='dt' onchange='this.form.submit();'><option value='0' selected='selected'>unified</option><option value='1'>ssdiff</option><option value='2'>stat only</option></select></td></tr><tr><td/><td class='ctrl'><noscript><input type='submit' value='reload'/></noscript></td></tr></table></form></div><table summary='commit info' class='commit-info'>
<tr><th>author</th><td>Vincent &lt;vincent.stehle@laposte.net&gt;</td><td class='right'>2017-01-30 15:06:43 +0100</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-01-31 13:07:40 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/drivers/vx?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>c73e44269369e936165f0f9b61f1f09a11dae01c</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/drivers/vx?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>e2188e900ba06302f8ed2746cb07edd3efbc5c35</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/drivers/vx?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>sound/drivers/vx</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/drivers/vx?id=040587af31228d82c52267f717c9fcdb65f36335'>040587af31228d82c52267f717c9fcdb65f36335</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/drivers/vx?id=c73e44269369e936165f0f9b61f1f09a11dae01c&amp;id2=040587af31228d82c52267f717c9fcdb65f36335'>diff</a>)</td></tr></table>
<div class='commit-subject'>net: thunderx: avoid dereferencing xcv when NULL</div><div class='commit-msg'>This fixes the following smatch and coccinelle warnings:

  drivers/net/ethernet/cavium/thunder/thunder_xcv.c:119 xcv_setup_link() error: we previously assumed 'xcv' could be null (see line 118) [smatch]
  drivers/net/ethernet/cavium/thunder/thunder_xcv.c:119:16-20: ERROR: xcv is NULL but dereferenced. [coccinelle]

Fixes: 6465859aba1e66a5 ("net: thunderx: Add RGMII interface type support")
Signed-off-by: Vincent Stehlé &lt;vincent.stehle@laposte.net&gt;
Cc: Sunil Goutham &lt;sgoutham@cavium.com&gt;
Signed-off-by: David S. Miller &lt;davem@davemloft.net&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=c73e44269369e936165f0f9b61f1f09a11dae01c'>Diffstat</a> (limited to 'sound/drivers/vx')</div><table summary='diffstat' class='diffstat'>