#include "unwind.h"
#include "thread.h"
#include "session.h"
#include "debug.h"
#include "arch/common.h"

struct unwind_libunwind_ops __weak *local_unwind_libunwind_ops;
struct unwind_libunwind_ops __weak *x86_32_unwind_libunwind_ops;
struct unwind_libunwind_ops __weak *arm64_unwind_libunwind_ops;

static void unwind__register_ops(struct thread *thread,
			  struct unwind_libunwind_ops *ops)
{
	thread->unwind_libunwind_ops = ops;
}

int unwind__prepare_access(struct thread *thread, struct map *map,
			   bool *initialized)
{
	const char *arch;
	enum dso_type dso_type;
	struct unwind_libunwind_ops *ops = local_unwind_libunwind_ops;
	int err;

	if (thread->addr_space) {
		pr_debug("unwind: thread map already set, dso=%s\n",
			 map->dso->name);
		if (initialized)
			*initialized = true;
		return 0;
	}

	/* env->arch is NULL for live-mode (i.e. perf top) */
	if (!thread->mg->machine->env || !thread->mg->machine->env->arch)
		goto out_register;

	dso_type = dso__type(map->dso, thread->mg->machine);
	if (dso_type == DSO__TYPE_UNKNOWN)
		return 0;

	arch = normalize_arch(thread->mg->machine->env->arch);

	if (!strcmp(arch, "x86")) {
		if (dso_type != DSO__TYPE_64BIT)
			ops = x86_32_unwind_libunwind_ops;
	} else if (!strcmp(arch, "arm64") || !strcmp(arch, "arm")) {
		if (dso_type == DSO__TYPE_64BIT)
			ops = arm64_unwind_libunwind_ops;
	}

	if (!ops) {
		pr_err("unwind: target platform=%s is not supported\n", arch);
		return -1;
	}
out_register:
	unwind__register_ops(thread, ops);

	err = thread->unwind_libunwind_ops->prepare_access(thread);
	if (initialized)
		*initialized = err ? false : true;
	return err;
}

void unwind__flush_access(struct thread *thread)
{
	if (thread->unwind_libunwind_ops)
		thread->unwind_libunwind_ops->flush_access(thread);
}

void unwind__finish_access(struct thread *thread)
{
	if (thread->unwind_libunwind_ops)
		thread->unwind_libunwind_ops->finish_access(thread);
}

int unwind__get_entries(unwind_entry_cb_t cb, void *arg,
			 struct thread *thread,
			 struct perf_sample *data, int max_stack)
{
	if (thread->unwind_libunwind_ops)
		return thread->unwind_libunwind_ops->get_entries(cb, arg, thread, data, max_stack);
	return 0;
}
 class='right' method='get' action='/cgit.cgi/linux/net-next.git/log/drivers/usb/host/hwa-hc.c'>
<input type='hidden' name='id' value='f2557779e1a9cfbf69c99b74da26cc1b2b10e752'/><select name='qt'>
<option value='grep'>log msg</option>
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<div class='path'>path: <a href='/cgit.cgi/linux/net-next.git/commit/?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752'>root</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752'>drivers</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752'>usb</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752'>host</a>/<a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/hwa-hc.c?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752'>hwa-hc.c</a></div><div class='content'><div class='cgit-panel'><b>diff options</b><form method='get'><input type='hidden' name='id' value='f2557779e1a9cfbf69c99b74da26cc1b2b10e752'/><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>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-02 12:34:27 -0800</td></tr>
<tr><th>committer</th><td>Linus Torvalds &lt;torvalds@linux-foundation.org&gt;</td><td class='right'>2017-02-02 12:34:27 -0800</td></tr>
<tr><th>commit</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/hwa-hc.c?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752'>f2557779e1a9cfbf69c99b74da26cc1b2b10e752</a> (<a href='/cgit.cgi/linux/net-next.git/patch/drivers/usb/host/hwa-hc.c?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752'>patch</a>)</td></tr>
<tr><th>tree</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/tree/?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752'>8ddca65c897199add553948c429072b8bd463692</a> /<a href='/cgit.cgi/linux/net-next.git/tree/drivers/usb/host/hwa-hc.c?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752'>drivers/usb/host/hwa-hc.c</a></td></tr>
<tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/hwa-hc.c?id=6d04dfc8966019b8b0977b2cb942351f13d2b178'>6d04dfc8966019b8b0977b2cb942351f13d2b178</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/host/hwa-hc.c?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752&amp;id2=6d04dfc8966019b8b0977b2cb942351f13d2b178'>diff</a>)</td></tr><tr><th>parent</th><td colspan='2' class='oid'><a href='/cgit.cgi/linux/net-next.git/commit/drivers/usb/host/hwa-hc.c?id=030305d69fc6963c16003f50d7e8d74b02d0a143'>030305d69fc6963c16003f50d7e8d74b02d0a143</a> (<a href='/cgit.cgi/linux/net-next.git/diff/drivers/usb/host/hwa-hc.c?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752&amp;id2=030305d69fc6963c16003f50d7e8d74b02d0a143'>diff</a>)</td></tr></table>
<div class='commit-subject'>Merge tag 'pci-v4.10-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci</div><div class='commit-msg'>Pull PCI fix from Bjorn Helgaas:
 "Configure ASPM on the link from a PCI-to-PCIe bridge (avoids a NULL
  pointer dereference on topologies including these bridges)"

* tag 'pci-v4.10-fixes-2' of git://git.kernel.org/pub/scm/linux/kernel/git/helgaas/pci:
  PCI/ASPM: Handle PCI-to-PCIe bridges as roots of PCIe hierarchies
</div><div class='diffstat-header'><a href='/cgit.cgi/linux/net-next.git/diff/?id=f2557779e1a9cfbf69c99b74da26cc1b2b10e752'>Diffstat</a> (limited to 'drivers/usb/host/hwa-hc.c')</div><table summary='diffstat' class='diffstat'>