/*
 * Copyright 2015, Michael Neuling, IBM Corp.
 * Licensed under GPLv2.
 *
 * Test the kernel's signal return code to ensure that it doesn't
 * crash when both the transactional and suspend MSR bits are set in
 * the signal context.
 *
 * For this test, we send ourselves a SIGUSR1.  In the SIGUSR1 handler
 * we modify the signal context to set both MSR TM S and T bits (which
 * is "reserved" by the PowerISA). When we return from the signal
 * handler (implicit sigreturn), the kernel should detect reserved MSR
 * value and send us with a SIGSEGV.
 */

#include <stdlib.h>
#include <stdio.h>
#include <signal.h>
#include <unistd.h>

#include "utils.h"
#include "tm.h"

int segv_expected = 0;

void signal_segv(int signum)
{
	if (segv_expected && (signum == SIGSEGV))
		_exit(0);
	_exit(1);
}

void signal_usr1(int signum, siginfo_t *info, void *uc)
{
	ucontext_t *ucp = uc;

	/* Link tm checkpointed context to normal context */
	ucp->uc_link = ucp;
	/* Set all TM bits so that the context is now invalid */
#ifdef __powerpc64__
	ucp->uc_mcontext.gp_regs[PT_MSR] |= (7ULL << 32);
#else
	ucp->uc_mcontext.uc_regs->gregs[PT_MSR] |= (7ULL);
#endif
	/* Should segv on return becuase of invalid context */
	segv_expected = 1;
}

int tm_signal_msr_resv()
{
	struct sigaction act;

	SKIP_IF(!have_htm());

	act.sa_sigaction = signal_usr1;
	sigemptyset(&act.sa_mask);
	act.sa_flags = SA_SIGINFO;
	if (sigaction(SIGUSR1, &act, NULL) < 0) {
		perror("sigaction sigusr1");
		exit(1);
	}
	if (signal(SIGSEGV, signal_segv) == SIG_ERR)
		exit(1);

	raise(SIGUSR1);

	/* We shouldn't get here as we exit in the segv handler */
	return 1;
}

int main(void)
{
	return test_harness(tm_signal_msr_resv, "tm_signal_msr_resv");
}
i/linux/net-next.git/log/sound/soc/pxa/pxa2xx-ac97.c?h=nds-private-remove'>log</a><a href='/cgit.cgi/linux/net-next.git/tree/sound/soc/pxa/pxa2xx-ac97.c?h=nds-private-remove&amp;id=500c0106e638e08c2c661c305ed57d6b67e10908'>tree</a><a href='/cgit.cgi/linux/net-next.git/commit/sound/soc/pxa/pxa2xx-ac97.c?h=nds-private-remove&amp;id=500c0106e638e08c2c661c305ed57d6b67e10908'>commit</a><a href='/cgit.cgi/linux/net-next.git/diff/sound/soc/pxa/pxa2xx-ac97.c?h=nds-private-remove&amp;id=500c0106e638e08c2c661c305ed57d6b67e10908'>diff</a></td><td class='form'><form class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/sound/soc/pxa/pxa2xx-ac97.c'>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/log/?h=nds-private-remove&amp;id=500c0106e638e08c2c661c305ed57d6b67e10908'>root</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound?h=nds-private-remove&amp;id=500c0106e638e08c2c661c305ed57d6b67e10908'>sound</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc?h=nds-private-remove&amp;id=500c0106e638e08c2c661c305ed57d6b67e10908'>soc</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/pxa?h=nds-private-remove&amp;id=500c0106e638e08c2c661c305ed57d6b67e10908'>pxa</a>/<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/pxa/pxa2xx-ac97.c?h=nds-private-remove&amp;id=500c0106e638e08c2c661c305ed57d6b67e10908'>pxa2xx-ac97.c</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/cgit.cgi/linux/net-next.git/log/sound/soc/pxa/pxa2xx-ac97.c?h=nds-private-remove&amp;id=500c0106e638e08c2c661c305ed57d6b67e10908&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th><th class='left'>Files</th><th class='left'>Lines</th></tr>
alue='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>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-02-02 16:54:00 -0500</td></tr>
<tr><th>committer</th><td>David S. Miller &lt;davem@davemloft.net&gt;</td><td class='right'>2017-02-02 16:54:00 -0500</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/dwc2/core_intr.c?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>e2160156bf2a7d5018e99a9993fbcdda0abac09b</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/dwc2/core_intr.c?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>1a70cb13dcfa7ade4c48d8a64d20543abebfb1dc</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/dwc2/core_intr.c?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>drivers/usb/dwc2/core_intr.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/dwc2/core_intr.c?id=62e13097c46c69dbd7544ab2cd585ccf48f360a4'>62e13097c46c69dbd7544ab2cd585ccf48f360a4</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/dwc2/core_intr.c?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b&amp;id2=62e13097c46c69dbd7544ab2cd585ccf48f360a4'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/dwc2/core_intr.c?id=6d04dfc8966019b8b0977b2cb942351f13d2b178'>6d04dfc8966019b8b0977b2cb942351f13d2b178</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/dwc2/core_intr.c?id=e2160156bf2a7d5018e99a9993fbcdda0abac09b&amp;id2=6d04dfc8966019b8b0977b2cb942351f13d2b178'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge git://git.kernel.org/pub/scm/linux/kernel/git/davem/net</div><div class='commit-msg'>All merge conflicts were simple overlapping changes.

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=e2160156bf2a7d5018e99a9993fbcdda0abac09b'>Diffstat</a> (limited to 'drivers/usb/dwc2/core_intr.c')</div><table summary='diffstat' class='diffstat'>