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Stack Overflow and Underflow detected !

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This commit is contained in:
Adrien Bourmault 2019-05-22 08:35:58 +02:00
parent a3716901ce
commit 3d21fff8d4
3 changed files with 31 additions and 14 deletions
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17
kaleid/kernel/ke/idt.c
View File

@ -299,12 +299,14 @@ static void EarlyExceptionHandler(ISRFrame_t *regs)
KeHaltCPU();
}
//
// Double Fault handling and stack overflow detection
//
static void DoubleFaultHandler(ISRFrame_t *regs)
{
ulong StackGuardOne = (ulong)MmGetStackGuards(0);
ulong StackGuardTwo = (ulong)MmGetStackGuards(1);
if (regs->rsp <= StackGuardTwo + 4*KB) {
if (regs->rsp <= StackGuardTwo + 4*KB && (regs->rsp - 4*KB <= regs->cr2)) {
bprintf(BStdOut,
"\n\n%CPANIC\n[ISR 0x8] Irrecoverable Kernel Stack Overflow\n\n"
" Double Fault Error code : %#x (%b)\n"
@ -315,17 +317,6 @@ static void DoubleFaultHandler(ISRFrame_t *regs)
regs->ErrorCode,
StackGuardTwo
);
} else if (regs->rsp <= StackGuardOne) {
bprintf(BStdOut,
"\n\n%CPANIC\n[ISR 0x8] Irrecoverable Kernel Stack Underflow\n\n"
" Double Fault Error code : %#x (%b)\n"
" Stack Guard bypassed : %#x",
VGA_COLOR_LIGHT_RED,
regs->ErrorCode,
regs->ErrorCode,
StackGuardOne
);
} else {
bprintf(BStdOut,
"\n\n%CPANIC\n[ISR 0x8] Irrecoverable Kernel Double Fault Abort\n\n"

14
kaleid/kernel/mm/paging.c
View File

@ -178,6 +178,19 @@ void *MmTranslateKPageToAddr(void *rank)
//
static void PagingHandler(ISRFrame_t *regs)
{
ulong StackGuardOne = (ulong)MmGetStackGuards(0);
if (regs->cr2 >= StackGuardOne && (regs->rsp + 4*KB >= regs->cr2)) {
bprintf(BStdOut,
"\n\n%CPANIC\n[ISR 0x8] Irrecoverable Kernel Stack Underflow\n\n"
" Double Fault Error code : %#x (%b)\n"
" Stack Guard bypassed : %#x",
VGA_COLOR_LIGHT_RED,
regs->ErrorCode,
regs->ErrorCode,
StackGuardOne
);
} else {
bprintf(BStdOut, "\n\n%CPANIC\n[ISR 0x%x] Irrecoverable Kernel Page Fault at %p\n\n"
" Error code : 0x%x (%b)",
@ -187,6 +200,7 @@ static void PagingHandler(ISRFrame_t *regs)
regs->ErrorCode,
regs->ErrorCode
);
}
KeBrkDumpRegisters(regs);

12
kaleid/kernel/sh/shcmds.c
View File

@ -203,6 +203,17 @@ error_t CmdStackOverflow(int argc, char **argv, char *cmdline)
return EOK;
}
error_t CmdStackUnderflow(int argc, char **argv, char *cmdline)
{
KernLog("\n%p\n%p\n%p\n%p\n%p\n%p\n%p\n%p\n"
"\n%p\n%p\n%p\n%p\n%p\n%p\n%p\n%p\n"
"\n%p\n%p\n%p\n%p\n%p\n%p\n%p\n%p\n"
"\n%p\n%p\n%p\n%p\n%p\n%p\n%p\n%p\n"
"\n%p\n%p\n%p\n%p\n%p\n%p\n%p\n%p\n"
);
return EOK;
}
error_t CmdMemUsage(int argc, char **argv, char *cmdline);
error_t CmdVersion(int argc, char **argv, char *cmdline)
@ -238,6 +249,7 @@ Command_t cmdtable[] =
{ "quit", CmdQuit, "Alias for 'exit'" },
{ "shell", CmdShell, "Start a new shell (nested)", },
{ "stkov", CmdStackOverflow, "Provoke a stack overflow" },
{ "stkun", CmdStackUnderflow, "Provoke a stack underflow" },
{ "time", CmdTime, "Print time" },
{ "ver", CmdVersion, "Version and legal infos" },
{ NULL, NULL, NULL }