mirrors/cosmopolitan
1
0
Fork 0
mirror of https://github.com/jart/cosmopolitan.git synced 2025-06-01 18:22:27 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions 1

Initial import

Browse source
This commit is contained in:
Justine Tunney 2020-06-15 07:18:57 -07:00
commit c91b3c5006
14915 changed files with 590219 additions and 0 deletions
Download patch file Download diff file Expand all files Collapse all files

66
test/ape/lib/getpagetableentry_test.c Normal file
View file

@ -0,0 +1,66 @@
/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│vi: set net ft=c ts=2 sts=2 sw=2 fenc=utf-8 :vi│
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2020 Justine Alexandra Roberts Tunney │
│ │
│ 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; version 2 of the License. │
│ │
│ 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., 51 Franklin Street, Fifth Floor, Boston, MA │
│ 02110-1301 USA │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "ape/lib/pc.h"
#include "libc/mem/mem.h"
#include "libc/runtime/gc.h"
#include "libc/str/str.h"
#include "libc/testlib/testlib.h"
TEST(getpagetableentry, testLowestAddress) {
static struct PageTable pml4t;
static struct PageTable stack[3];
uint64_t ptsp = (uintptr_t)&stack + sizeof(stack);
memset(&pml4t, 0, sizeof(pml4t));
memset(&stack, 0, sizeof(stack));
uint64_t vaddr = 0;
uint64_t paddr = 0x31337000;
*getpagetableentry(vaddr, 3, &pml4t, &ptsp) = paddr | PAGE_V;
EXPECT_EQ(&stack[2].p[0], pml4t.p[0] & PAGE_TA); /* pml4t → pdpt */
EXPECT_EQ(&stack[1].p[0], stack[2].p[0] & PAGE_TA); /* pdpt → pdt */
EXPECT_EQ(&stack[0].p[0], stack[1].p[0] & PAGE_TA); /* pdt → pd */
EXPECT_EQ(stack[0].p[0] & PAGE_TA, paddr); /* page */
EXPECT_EQ(&stack, ptsp);
EXPECT_TRUE(pml4t.p[0] & PAGE_V);
EXPECT_TRUE(stack[2].p[0] & PAGE_V);
EXPECT_TRUE(stack[1].p[0] & PAGE_V);
EXPECT_TRUE(stack[0].p[0] & PAGE_V);
EXPECT_FALSE(stack[0].p[1] & PAGE_V);
}
TEST(getpagetableentry, testHigherAddress) {
static struct PageTable pml4t;
static struct PageTable stack[3];
uint64_t ptsp = (uintptr_t)&stack + sizeof(stack);
memset(&pml4t, 0, sizeof(pml4t));
memset(&stack, 0, sizeof(stack));
uint64_t vaddr = 0x133731337000;
uint64_t paddr = 0x123000;
*getpagetableentry(vaddr, 3, &pml4t, &ptsp) = paddr | PAGE_V;
EXPECT_EQ(&stack[2].p[0], pml4t.p[38] & PAGE_TA); /* pml4t → pdpt */
EXPECT_EQ(&stack[1].p[0], stack[2].p[220] & PAGE_TA); /* pdpt → pdt */
EXPECT_EQ(&stack[0].p[0], stack[1].p[393] & PAGE_TA); /* pdt → pd */
EXPECT_EQ(stack[0].p[311] & PAGE_TA, paddr); /* page */
EXPECT_EQ(&stack, ptsp);
EXPECT_TRUE(pml4t.p[38] & PAGE_V);
EXPECT_TRUE(stack[2].p[220] & PAGE_V);
EXPECT_TRUE(stack[1].p[393] & PAGE_V);
EXPECT_TRUE(stack[0].p[311] & PAGE_V);
EXPECT_FALSE(stack[0].p[0] & PAGE_V);
}