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Fix some issues and do some code cleanup

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This commit is contained in:
Justine Tunney 2022-05-23 10:15:53 -07:00
parent 1f229e4efc
commit 312ed5c67c
72 changed files with 880 additions and 982 deletions
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58
libc/runtime/stackchkfail.c
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@ -16,59 +16,11 @@
│ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR │
│ PERFORMANCE OF THIS SOFTWARE. │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/bits/pushpop.h"
#include "libc/nt/enum/version.h"
#include "libc/nt/runtime.h"
#include "libc/intrin/kprintf.h"
#include "libc/runtime/internal.h"
#include "libc/sysv/consts/fileno.h"
#include "libc/sysv/consts/nr.h"
#define STACK_SMASH_MESSAGE "stack smashed\n"
/**
* Aborts program under enemy fire to avoid being taken alive.
*/
privileged noasan void __stack_chk_fail(void) {
size_t len;
const char *msg;
int64_t ax, cx, si;
if (!IsWindows()) {
msg = STACK_SMASH_MESSAGE;
len = pushpop(sizeof(STACK_SMASH_MESSAGE) - 1);
if (!IsMetal()) {
asm volatile("syscall"
: "=a"(ax)
: "0"(__NR_write), "D"(pushpop(STDERR_FILENO)), "S"(msg),
"d"(len)
: "rcx", "r11", "cc", "memory");
asm volatile("syscall"
: "=a"(ax)
: "0"(__NR_exit_group), "D"(pushpop(23))
: "rcx", "r11", "cc", "memory");
}
asm volatile("rep outsb"
: "=S"(si), "=c"(cx)
: "0"(msg), "1"(len), "d"(0x3F8 /* COM1 */)
: "memory");
asm("push\t$0\n\t"
"push\t$0\n\t"
"cli\n\t"
"lidt\t(%rsp)");
for (;;) asm("ud2");
}
if (NtGetVersion() < kNtVersionFuture) {
do {
asm volatile("syscall"
: "=a"(ax), "=c"(cx)
: "0"(NtGetVersion() < kNtVersionWindows8 ? 0x0029
: NtGetVersion() < kNtVersionWindows81 ? 0x002a
: NtGetVersion() < kNtVersionWindows10 ? 0x002b
: 0x002c),
"1"(pushpop(-1L)), "d"(42)
: "r11", "cc", "memory");
} while (!ax);
}
for (;;) {
TerminateProcess(GetCurrentProcess(), 42);
}
privileged noasan noinstrument void __stack_chk_fail(void) {
kprintf("stack smashed\n");
__restorewintty();
_Exit(207);
}