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wip: sts. vincent and anastasius

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This commit is contained in:
Matthew LeVan 2024-01-22 20:57:34 -05:00
parent f7fcffc429
commit cb73bcd8ca
3 changed files with 572 additions and 508 deletions
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1039
rust/ares/src/interpreter.rs
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File diff suppressed because it is too large Load Diff

30
rust/ares_guard/c-src/guard.c
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@ -14,19 +14,11 @@ static void *guard_p = NULL;
static void *stack_p = NULL;
static void *alloc_p = NULL;
typedef enum {
guard_sound = 0, // job's done
guard_armor = 1, // mprotect
guard_weird = 2, // strange state
guard_spent = 3, // out of memory (bail:meme)
guard_erupt = 4, // sigint
} guard_error;
volatile sig_atomic_t guard_err = guard_sound;
volatile sig_atomic_t err = guard_sound;
// Center the guard page.
guard_error _focus_guard() {
guard_err _focus_guard() {
// Check for strange situations.
if (stack_p == NULL || alloc_p == NULL) {
return guard_weird;
@ -62,7 +54,7 @@ guard_error _focus_guard() {
return guard_sound;
}
guard_error _slash_guard(void *si_addr) {
guard_err _slash_guard(void *si_addr) {
if (si_addr >= guard_p && si_addr < guard_p + GD_PAGESIZE) {
return _focus_guard();
}
@ -73,17 +65,17 @@ guard_error _slash_guard(void *si_addr) {
void _signal_handler(int sig, siginfo_t *si, void *unused) {
switch (sig) {
case SIGSEGV:
guard_err = _slash_guard(si->si_addr);
err = _slash_guard(si->si_addr);
break;
case SIGINT:
guard_err = guard_erupt;
err = guard_erupt;
break;
default:
break;
}
}
guard_error _register_handler() {
guard_err _register_handler() {
struct sigaction sa;
sa.sa_flags = SA_SIGINFO;
@ -97,28 +89,28 @@ guard_error _register_handler() {
return guard_sound;
}
void guard(void *(*f)(void *), void *arg, void **stack, void **alloc, void **ret) {
void guard(void *(*f)(void *), void *arg, void *const *const stack, void *const *const alloc, void **ret) {
stack_p = *stack;
alloc_p = *alloc;
if (_register_handler() != guard_sound) {
guard_err = guard_weird;
err = guard_weird;
goto fail;
}
if (guard_p == NULL && (guard_err = _focus_guard()) != guard_sound) {
if (guard_p == NULL && (err = _focus_guard()) != guard_sound) {
goto fail;
}
*ret = f(arg);
if (guard_err != guard_sound) {
if (err != guard_sound) {
goto fail;
}
return;
fail:
*ret = (void *) &guard_err;
*ret = (void *) &err;
return;
}

11
rust/ares_guard/c-src/guard.h
View File

@ -30,6 +30,15 @@
* error will be written to the `ret` pointer. The caller is then responsible
* for handling this error and aborting with a `bail:meme`.
*/
void guard(void *(*f)(void *), void *arg, void **stack, void **alloc, void **ret);
void guard(void *(*f)(void *), void *arg, void *const *const stack, void *const *const alloc, void **ret);
typedef enum {
guard_sound = 0, // job's done
guard_armor = 1, // mprotect
guard_weird = 2, // strange state
guard_spent = 3, // out of memory (bail:meme)
guard_erupt = 4, // sigint
} guard_err;
#endif