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Perform more low-level code cleanup

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This commit is contained in:
Justine Tunney 2022-09-09 04:07:08 -07:00
parent c32e2d4486
commit 2d17ab016c
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GPG key ID: BE714B4575D6E328
42 changed files with 977 additions and 265 deletions
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70
test/libc/runtime/arch_prctl_test.c
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@ -16,10 +16,18 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/intrin/segmentation.h"
#include "libc/calls/calls.h"
#include "libc/calls/struct/sigaction.h"
#include "libc/calls/syscall-sysv.internal.h"
#include "libc/dce.h"
#include "libc/errno.h"
#include "libc/intrin/fsgsbase.h"
#include "libc/intrin/kprintf.h"
#include "libc/intrin/segmentation.h"
#include "libc/nexgen32e/threaded.h"
#include "libc/nt/version.h"
#include "libc/sysv/consts/sa.h"
#include "libc/sysv/consts/sig.h"
#include "libc/testlib/testlib.h"
void SetUpOnce(void) {
@ -27,19 +35,35 @@ void SetUpOnce(void) {
ASSERT_SYS(0, 0, pledge("stdio rpath", 0));
}
void OnTrap(int sig, struct siginfo *si, void *vctx) {
struct ucontext *ctx = vctx;
}
void TriggerSignal(void) {
struct sigaction old;
struct sigaction sig = {.sa_sigaction = OnTrap, .sa_flags = SA_SIGINFO};
sched_yield();
sigaction(SIGTRAP, &sig, &old);
asm("int3");
sigaction(SIGTRAP, &old, 0);
sched_yield();
}
TEST(arch_prctl, fs) {
if (IsLinux() || IsOpenbsd()) {
if (IsLinux() || IsFreebsd() || IsNetbsd() || IsOpenbsd()) {
uint64_t n, x;
x = 0xdeadbeef;
arch_prctl(ARCH_SET_FS, &x);
ASSERT_NE(-1, arch_prctl(ARCH_GET_FS, (intptr_t)&n));
ASSERT_EQ((intptr_t)&x, n);
ASSERT_EQ(0xdeadbeef, fs((int64_t *)0));
TriggerSignal();
ASSERT_EQ(0xdeadbeef, fs((int64_t *)0));
}
}
TEST(arch_prctl, pointerRebasingFs) {
if (IsLinux() || IsOpenbsd()) {
if (IsLinux() || IsFreebsd() || IsOpenbsd() || IsNetbsd()) {
unsigned long s[] = {0x0706050403020100, 0x0f0e0d0c0b0a0908};
ASSERT_EQ(0x0706050403020100, s[0]);
ASSERT_EQ(0, arch_prctl(ARCH_SET_FS, 1));
@ -53,26 +77,52 @@ TEST(arch_prctl, pointerRebasingFs) {
}
TEST(arch_prctl, gs) {
if (IsLinux()) {
if (IsLinux() || IsFreebsd() || IsNetbsd() || IsXnu()) {
uint64_t n, x;
x = 0xdeadbeef;
arch_prctl(ARCH_SET_GS, &x);
ASSERT_NE(-1, arch_prctl(ARCH_GET_GS, (intptr_t)&n));
ASSERT_EQ((intptr_t)&x, n);
if (!IsXnu()) {
ASSERT_NE(-1, arch_prctl(ARCH_GET_GS, (intptr_t)&n));
ASSERT_EQ((intptr_t)&x, n);
}
ASSERT_EQ(0xdeadbeef, gs((int64_t *)0));
TriggerSignal();
ASSERT_EQ(0xdeadbeef, gs((int64_t *)0));
}
}
TEST(arch_prctl, pointerRebasing) {
if (IsLinux()) {
if (IsLinux() || IsFreebsd() || IsNetbsd() || IsXnu()) {
unsigned long s[] = {0x0706050403020100, 0x0f0e0d0c0b0a0908};
ASSERT_EQ(0x0706050403020100, s[0]);
ASSERT_EQ(0, arch_prctl(ARCH_SET_GS, 1));
ASSERT_EQ(0x0807060504030201, gs(&s[0]));
ASSERT_EQ(0, arch_prctl(ARCH_SET_GS, 2));
ASSERT_EQ(0x0908070605040302, gs(&s[0]));
intptr_t gs;
ASSERT_EQ(0, arch_prctl(ARCH_GET_GS, &gs));
ASSERT_EQ(2, gs);
if (!IsXnu()) {
intptr_t gs;
ASSERT_EQ(0, arch_prctl(ARCH_GET_GS, &gs));
ASSERT_EQ(2, gs);
}
}
}
TEST(fsgsbase, fs) {
if (!_have_fsgsbase()) return;
int64_t mem = 0xdeadbeef;
_wrfsbase(&mem);
ASSERT_EQ(&mem, _rdfsbase());
ASSERT_EQ(0xdeadbeef, fs((int64_t *)0));
TriggerSignal();
ASSERT_EQ(0xdeadbeef, fs((int64_t *)0));
}
TEST(fsgsbase, gs) {
if (!_have_fsgsbase()) return;
int64_t mem = 0xdeadbeef;
_wrgsbase(&mem);
ASSERT_EQ(&mem, _rdgsbase());
ASSERT_EQ(0xdeadbeef, gs((int64_t *)0));
TriggerSignal();
ASSERT_EQ(0xdeadbeef, gs((int64_t *)0));
}