main.c File Reference

XSA-304 More...

#include <xtf.h>

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Typedefs
typedef void()	stub_t(intpte_t *l2t, const bool *cond)

Functions
	asm (".align 4096;" ".skip 4096 - (stub_page_boundary - stub_fn);" "stub_fn:" " movq $" STR((16<< 20)|PF_SYM(PSE, AD, RW, P)) ", 8*8(%rdi);" " invlpg stub_page_boundary + (16 << 20);" " cmpb $0, (%rsi);" " .byte 0x74, 1f - (. + 1);" " movb $0, -1;" "stub_page_boundary:" "1: ret;")
void	test_main (void)
	To be implemented by each test, as its entry point. More...

Variables
const char	test_title [] = "XSA-304 PoC"
	The title of the test. More...
stub_t	stub_fn
static intpte_t	nl3t [512]
static intpte_t	nl2t [512]
static intpte_t	nl1t [512]

Detailed Description

XSA-304

Definition in file main.c.

Typedef Documentation

stub_t

typedef void() stub_t(intpte_t *l2t, const bool *cond)

Definition at line 25 of file main.c.

Function Documentation

asm()

asm	(	".align 4096;" ".skip 4096 - (stub_page_boundary - stub_fn);" "stub_fn:" " movq $" STR((16<< 20)|PF_SYM(PSE, AD, RW, P)) "	,
		8 *8(%rdi);" " invlpg stub_page_boundary+(16<< 20);" " cmpb	$0,
		(%rsi);" " .byte	0x74,
		1f -(.+1);" " movb	$0,
		-1;" "stub_page_boundary:" "1:ret;"
	)

test_main()

void test_main

(

void

)

To be implemented by each test, as its entry point.

Todo:

Implement better command line infrastructure, but this will do for now.

At the time of writing, Xen doesn't correctly handle invlpg while running in shadow mode on AMD Gen1 hardware lacking decode assistance. For this test, we simply care that Xen doesn't crash.

Definition at line 85 of file main.c.

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Variable Documentation

test_title

const char test_title[] = "XSA-304 PoC"

The title of the test.

Definition at line 23 of file main.c.

stub_fn

stub_t stub_fn

nl3t

intpte_t nl3t[512]

static

Definition at line 81 of file main.c.

nl2t

intpte_t nl2t[512]

static

Definition at line 82 of file main.c.

nl1t

intpte_t nl1t[512]

static

Definition at line 83 of file main.c.