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boot: Detect nested assertions

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This commit is contained in:
Jan Janssen 2023-03-10 09:12:05 +01:00
parent 6742397921
commit a05f03225e
1 changed files with 18 additions and 5 deletions
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23
src/boot/efi/log.c
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@ -10,8 +10,23 @@ _noreturn_ static void freeze(void) {
BS->Stall(60 * 1000 * 1000);
}
_noreturn_ static void panic(const char16_t *message) {
if (ST->ConOut->Mode->CursorColumn > 0)
ST->ConOut->OutputString(ST->ConOut, (char16_t *) u"\r\n");
ST->ConOut->SetAttribute(ST->ConOut, EFI_TEXT_ATTR(EFI_LIGHTRED, EFI_BLACK));
ST->ConOut->OutputString(ST->ConOut, (char16_t *) message);
freeze();
}
void efi_assert(const char *expr, const char *file, unsigned line, const char *function) {
log_error("systemd-boot assertion '%s' failed at %s:%u@%s. Halting.", expr, file, line, function);
static bool asserting = false;
/* Let's be paranoid. */
if (asserting)
panic(u"systemd-boot: Nested assertion failure, halting.");
asserting = true;
log_error("systemd-boot: Assertion '%s' failed at %s:%u@%s, halting.", expr, file, line, function);
freeze();
}
@ -48,12 +63,10 @@ void log_wait(void) {
/* These override the (weak) div0 handlers from libgcc as they would otherwise call raise() instead. */
_used_ _noreturn_ int __aeabi_idiv0(int return_value) {
log_error("Division by zero.");
freeze();
panic(u"systemd-boot: Division by zero, halting.");
}
_used_ _noreturn_ long long __aeabi_ldiv0(long long return_value) {
log_error("Division by zero.");
freeze();
panic(u"systemd-boot: Division by zero, halting.");
}
#endif