#ifndef TAIA_H
#define TAIA_H

#include <stdint.h>
#include <stdbool.h>
#include <stdio.h>
#include <sys/time.h>

#include "rnd.h"

struct tai {
	uint64_t x;
};

struct taia {
	struct tai sec;
	uint32_t nano;
	uint32_t atto;
};

static inline void tai_pack(unsigned char *s, struct tai *t)
{
	uint64_t x;

	x = t->x;

	s[7] = x & 255; x >>= 8;
	s[6] = x & 255; x >>= 8;
	s[5] = x & 255; x >>= 8;
	s[4] = x & 255; x >>= 8;
	s[3] = x & 255; x >>= 8;
	s[2] = x & 255; x >>= 8;
	s[1] = x & 255; x >>= 8;
	s[0] = x;
}

static inline void tai_unpack(unsigned char *s, struct tai *t)
{
	uint64_t x;

	x = (unsigned char) s[0];
	x <<= 8; x += (unsigned char) s[1];
	x <<= 8; x += (unsigned char) s[2];
	x <<= 8; x += (unsigned char) s[3];
	x <<= 8; x += (unsigned char) s[4];
	x <<= 8; x += (unsigned char) s[5];
	x <<= 8; x += (unsigned char) s[6];
	x <<= 8; x += (unsigned char) s[7];

	t->x = x;
}

static inline void taia_pack(unsigned char *s, struct taia *t)
{
	unsigned long x;

	tai_pack(s, &t->sec);

	s += 8;

	x = t->atto;

	s[7] = x & 255; x >>= 8;
	s[6] = x & 255; x >>= 8;
	s[5] = x & 255; x >>= 8;
	s[4] = x;

	x = t->nano;

	s[3] = x & 255; x >>= 8;
	s[2] = x & 255; x >>= 8;
	s[1] = x & 255; x >>= 8;
	s[0] = x;
} 

static inline void taia_unpack(unsigned char *s, struct taia *t)
{
	unsigned long x;

	tai_unpack(s, &t->sec);

	s += 8;

	x = (unsigned char) s[4];
	x <<= 8; x += (unsigned char) s[5];
	x <<= 8; x += (unsigned char) s[6];
	x <<= 8; x += (unsigned char) s[7];

	t->atto = x;

	x = (unsigned char) s[0];
	x <<= 8; x += (unsigned char) s[1];
	x <<= 8; x += (unsigned char) s[2];
	x <<= 8; x += (unsigned char) s[3];

	t->nano = x;
}

#define tai_unix(t, u) \
		((void) ((t)->x = 4611686018427387914ULL + \
				  (uint64_t) (u)))

static inline void taia_now(struct taia *t)
{
	struct timeval now;

	gettimeofday(&now, NULL);

	tai_unix(&t->sec, now.tv_sec);
	t->nano = 1000 * now.tv_usec + 500;
	/* We don't really have it, but bring some noise in. */
	t->atto = secrand();
}

static inline void taia_sub(struct taia *res, const struct taia *u,
			    const struct taia *v)
{
	unsigned long unano = u->nano;
	unsigned long uatto = u->atto;

	res->sec.x = u->sec.x - v->sec.x;
	res->nano = unano - v->nano;
	res->atto = uatto - v->atto;

	if (res->atto > uatto) {
		res->atto += 1000000000UL;
		--res->nano;
	}

	if (res->nano > unano) {
		res->nano += 1000000000UL;
		--res->sec.x;
	}
}

static inline void taia_add(struct taia *res, const struct taia *u,
			    const struct taia *v)
{
	res->sec.x = u->sec.x + v->sec.x;
	res->nano = u->nano + v->nano;
	res->atto = u->atto + v->atto;

	if (res->atto > 999999999UL) {
		res->atto -= 1000000000UL;
		++res->nano;
	}

	if (res->nano > 999999999UL) {
		res->nano -= 1000000000UL;
		++res->sec.x;
	}
}

static inline int taia_less(const struct taia *t, const struct taia *u)
{
	if (t->sec.x < u->sec.x)
		return 1;
	if (t->sec.x > u->sec.x)
		return 0;
	if (t->nano < u->nano)
		return 1;
	if (t->nano > u->nano)
		return 0;
	return t->atto < u->atto;
}

extern bool taia_looks_good(struct taia *arr_taia, struct taia *pkt_taia);

#endif /* TAIA_H */
58be896a'>Documentation</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='h' value='nds-private-remove'/><input type='hidden' name='id' value='4a6b27b79da5ccc6b85dc05bbe6a091e58be896a'/><table><tr><td colspan='2'/></tr><tr><td class='label'>context:</td><td class='ctrl'><select name='context' onchange='this.form.submit();'><option value='1'>1</option><option value='2'>2</option><option value='3' selected='selected'>3</option><option value='4'>4</option><option value='5'>5</option><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>Josh Poimboeuf &lt;jpoimboe@redhat.com&gt;</td><td class='right'>2016-05-16 15:16:18 -0500</td></tr>
<tr><th>committer</th><td>Herbert Xu &lt;herbert@gondor.apana.org.au&gt;</td><td class='right'>2016-05-17 14:26:52 +0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?h=nds-private-remove&amp;id=4a6b27b79da5ccc6b85dc05bbe6a091e58be896a'>4a6b27b79da5ccc6b85dc05bbe6a091e58be896a</a> (<a href='/cgit.cgi/linux/net-next.git/patch/Documentation?id=4a6b27b79da5ccc6b85dc05bbe6a091e58be896a'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?h=nds-private-remove&amp;id=4a6b27b79da5ccc6b85dc05bbe6a091e58be896a'>3b6c2e16d410844d288165218e62c037cb0e8ca3</a> /<a href='/cgit.cgi/linux/net-next.git/tree/Documentation?h=nds-private-remove&amp;id=4a6b27b79da5ccc6b85dc05bbe6a091e58be896a'>Documentation</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/Documentation?h=nds-private-remove&amp;id=256b1cfb9a346bb4808cd27b7b8f9b120f96491e'>256b1cfb9a346bb4808cd27b7b8f9b120f96491e</a> (<a href='/cgit.cgi/linux/net-next.git/diff/Documentation?h=nds-private-remove&amp;id=4a6b27b79da5ccc6b85dc05bbe6a091e58be896a&amp;id2=256b1cfb9a346bb4808cd27b7b8f9b120f96491e'>diff</a>)</td></tr></table>
<div class='commit-subject'>crypto: sha1-mb - make sha1_x8_avx2() conform to C function ABI</div><div class='commit-msg'>Megha Dey reported a kernel panic in crypto code.  The problem is that
sha1_x8_avx2() clobbers registers r12-r15 without saving and restoring
them.

Before commit aec4d0e301f1 ("x86/asm/crypto: Simplify stack usage in
sha-mb functions"), those registers were saved and restored by the
callers of the function.  I removed them with that commit because I
didn't realize sha1_x8_avx2() clobbered them.

Fix the potential undefined behavior associated with clobbering the
registers and make the behavior less surprising by changing the
registers to be callee saved/restored to conform with the C function
call ABI.

Also, rdx (aka RSP_SAVE) doesn't need to be saved: I verified that none
of the callers rely on it being saved, and it's not a callee-saved
register in the C ABI.

Fixes: aec4d0e301f1 ("x86/asm/crypto: Simplify stack usage in sha-mb functions")
Cc: stable@vger.kernel.org # 4.6
Reported-by: Megha Dey &lt;megha.dey@linux.intel.com&gt;
Signed-off-by: Josh Poimboeuf &lt;jpoimboe@redhat.com&gt;
Signed-off-by: Herbert Xu &lt;herbert@gondor.apana.org.au&gt;
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?h=nds-private-remove&amp;id=4a6b27b79da5ccc6b85dc05bbe6a091e58be896a'>Diffstat</a> (limited to 'Documentation')</div><table summary='diffstat' class='diffstat'>