/* Rewritten by Rusty Russell, on the backs of many others...
   Copyright (C) 2001 Rusty Russell, 2002 Rusty Russell IBM.

    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.

    This program is distributed in the hope that it will be useful,
    but WITHOUT ANY WARRANTY; without even the implied warranty of
    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
    GNU General Public License for more details.

    You should have received a copy of the GNU General Public License
    along with this program; if not, write to the Free Software
    Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
*/
#include <linux/ftrace.h>
#include <linux/memory.h>
#include <linux/module.h>
#include <linux/mutex.h>
#include <linux/init.h>

#include <asm/sections.h>
#include <linux/uaccess.h>

/*
 * mutex protecting text section modification (dynamic code patching).
 * some users need to sleep (allocating memory...) while they hold this lock.
 *
 * NOT exported to modules - patching kernel text is a really delicate matter.
 */
DEFINE_MUTEX(text_mutex);

extern struct exception_table_entry __start___ex_table[];
extern struct exception_table_entry __stop___ex_table[];

/* Cleared by build time tools if the table is already sorted. */
u32 __initdata __visible main_extable_sort_needed = 1;

/* Sort the kernel's built-in exception table */
void __init sort_main_extable(void)
{
	if (main_extable_sort_needed && __stop___ex_table > __start___ex_table) {
		pr_notice("Sorting __ex_table...\n");
		sort_extable(__start___ex_table, __stop___ex_table);
	}
}

/* Given an address, look for it in the exception tables. */
const struct exception_table_entry *search_exception_tables(unsigned long addr)
{
	const struct exception_table_entry *e;

	e = search_extable(__start___ex_table, __stop___ex_table-1, addr);
	if (!e)
		e = search_module_extables(addr);
	return e;
}

static inline int init_kernel_text(unsigned long addr)
{
	if (addr >= (unsigned long)_sinittext &&
	    addr < (unsigned long)_einittext)
		return 1;
	return 0;
}

int core_kernel_text(unsigned long addr)
{
	if (addr >= (unsigned long)_stext &&
	    addr < (unsigned long)_etext)
		return 1;

	if (system_state == SYSTEM_BOOTING &&
	    init_kernel_text(addr))
		return 1;
	return 0;
}

/**
 * core_kernel_data - tell if addr points to kernel data
 * @addr: address to test
 *
 * Returns true if @addr passed in is from the core kernel data
 * section.
 *
 * Note: On some archs it may return true for core RODATA, and false
 *  for others. But will always be true for core RW data.
 */
int core_kernel_data(unsigned long addr)
{
	if (addr >= (unsigned long)_sdata &&
	    addr < (unsigned long)_edata)
		return 1;
	return 0;
}

int __kernel_text_address(unsigned long addr)
{
	if (core_kernel_text(addr))
		return 1;
	if (is_module_text_address(addr))
		return 1;
	if (is_ftrace_trampoline(addr))
		return 1;
	/*
	 * There might be init symbols in saved stacktraces.
	 * Give those symbols a chance to be printed in
	 * backtraces (such as lockdep traces).
	 *
	 * Since we are after the module-symbols check, there's
	 * no danger of address overlap:
	 */
	if (init_kernel_text(addr))
		return 1;
	return 0;
}

int kernel_text_address(unsigned long addr)
{
	if (core_kernel_text(addr))
		return 1;
	if (is_module_text_address(addr))
		return 1;
	return is_ftrace_trampoline(addr);
}

/*
 * On some architectures (PPC64, IA64) function pointers
 * are actually only tokens to some data that then holds the
 * real function address. As a result, to find if a function
 * pointer is part of the kernel text, we need to do some
 * special dereferencing first.
 */
int func_ptr_is_kernel_text(void *ptr)
{
	unsigned long addr;
	addr = (unsigned long) dereference_function_descriptor(ptr);
	if (core_kernel_text(addr))
		return 1;
	return is_module_text_address(addr);
}
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>Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&gt;</td><td class='right'>2017-01-17 13:46:29 +0000</td></tr>
<tr><th>committer</th><td>Herbert Xu &lt;herbert@gondor.apana.org.au&gt;</td><td class='right'>2017-01-23 22:41:33 +0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/arm/pxa2xx-ac97.c?h=nds-private-remove&amp;id=11e3b725cfc282efe9d4a354153e99d86a16af08'>11e3b725cfc282efe9d4a354153e99d86a16af08</a> (<a href='/cgit.cgi/linux/net-next.git/patch/sound/arm/pxa2xx-ac97.c?id=11e3b725cfc282efe9d4a354153e99d86a16af08'>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=11e3b725cfc282efe9d4a354153e99d86a16af08'>8b5b9e0e1bcae1ab98ee652ffb7b13b05c209bd6</a> /<a href='/cgit.cgi/linux/net-next.git/tree/sound/arm/pxa2xx-ac97.c?h=nds-private-remove&amp;id=11e3b725cfc282efe9d4a354153e99d86a16af08'>sound/arm/pxa2xx-ac97.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/sound/arm/pxa2xx-ac97.c?h=nds-private-remove&amp;id=d6040764adcb5cb6de1489422411d701c158bb69'>d6040764adcb5cb6de1489422411d701c158bb69</a> (<a href='/cgit.cgi/linux/net-next.git/diff/sound/arm/pxa2xx-ac97.c?h=nds-private-remove&amp;id=11e3b725cfc282efe9d4a354153e99d86a16af08&amp;id2=d6040764adcb5cb6de1489422411d701c158bb69'>diff</a>)</td></tr></table>
<div class='commit-subject'>crypto: arm64/aes-blk - honour iv_out requirement in CBC and CTR modes</div><div class='commit-msg'>Update the ARMv8 Crypto Extensions and the plain NEON AES implementations
in CBC and CTR modes to return the next IV back to the skcipher API client.
This is necessary for chaining to work correctly.

Note that for CTR, this is only done if the request is a round multiple of
the block size, since otherwise, chaining is impossible anyway.

Cc: &lt;stable@vger.kernel.org&gt; # v3.16+
Signed-off-by: Ard Biesheuvel &lt;ard.biesheuvel@linaro.org&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=11e3b725cfc282efe9d4a354153e99d86a16af08'>Diffstat</a> (limited to 'sound/arm/pxa2xx-ac97.c')</div><table summary='diffstat' class='diffstat'>