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add missing fault handlers instead of throwing everything into the GP bin, add more ways to crash in native shell

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maksw authored and Maksymilian Wilczynski committed 2026-05-26 14:46:52 +02:00
1 parent e1248f4afe
commit 03bf767ac2
9 files changed
+425 -88
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code/kernel/ke_syscall.asm
+161
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@@ -377,6 +377,167 @@ pf_call:
call KeFaultDispatchFrame
KeFaultPF ENDP
; ---------------------------------------------------------
; Generic CPU exception stubs.
; Each vector gets its own IDT entry and vector number so faults like #UD
; do not fall through an absent descriptor and reappear as #GP.
; ---------------------------------------------------------
FAULT_NOERR MACRO StubName, VecNum
LOCAL noerr_kernel_frame, noerr_call
StubName PROC
push rax
push r11
mov r11, rsp
sub rsp, KFAULT_SIZE
mov rax, rsp
mov [rax + KF_R10], r10
mov r10, KFAULT_MAGIC
mov [rax + KF_Magic], r10
mov qword ptr [rax + KF_Vector], VecNum
mov qword ptr [rax + KF_ErrorCode], 0
mov qword ptr [rax + KF_Cr2], 0
mov [rax + KF_Rcx], rcx
mov [rax + KF_Rdx], rdx
mov [rax + KF_Rbx], rbx
mov [rax + KF_Rbp], rbp
mov [rax + KF_Rsi], rsi
mov [rax + KF_Rdi], rdi
mov [rax + KF_R8], r8
mov [rax + KF_R9], r9
mov r10, [r11]
mov [rax + KF_R11], r10
mov r10, [r11+8]
mov [rax + KF_Rax], r10
mov [rax + KF_R12], r12
mov [rax + KF_R13], r13
mov [rax + KF_R14], r14
mov [rax + KF_R15], r15
lea rdx, [r11+16]
mov r10, [rdx]
mov [rax + KF_Rip], r10
mov r10, [rdx+8]
mov [rax + KF_Cs], r10
mov r10, [rdx+16]
mov [rax + KF_Rflags], r10
mov r10, [rax + KF_Cs]
test r10, 3
jz noerr_kernel_frame
mov r10, [rdx+24]
mov [rax + KF_Rsp], r10
mov r10, [rdx+32]
mov [rax + KF_Ss], r10
jmp noerr_call
noerr_kernel_frame:
mov qword ptr [rax + KF_Rsp], 0
mov qword ptr [rax + KF_Ss], 0
noerr_call:
and rsp, -16
sub rsp, FAULT_CALL_SHADOW
mov rcx, rax
call KeFaultDispatchFrame
StubName ENDP
ENDM
FAULT_ERR MACRO StubName, VecNum
LOCAL err_kernel_frame, err_call
StubName PROC
push rax
push r11
mov r11, rsp
sub rsp, KFAULT_SIZE
mov rax, rsp
mov [rax + KF_R10], r10
mov r10, KFAULT_MAGIC
mov [rax + KF_Magic], r10
mov qword ptr [rax + KF_Vector], VecNum
mov qword ptr [rax + KF_Cr2], 0
mov [rax + KF_Rcx], rcx
mov [rax + KF_Rdx], rdx
mov [rax + KF_Rbx], rbx
mov [rax + KF_Rbp], rbp
mov [rax + KF_Rsi], rsi
mov [rax + KF_Rdi], rdi
mov [rax + KF_R8], r8
mov [rax + KF_R9], r9
mov r10, [r11]
mov [rax + KF_R11], r10
mov r10, [r11+8]
mov [rax + KF_Rax], r10
mov [rax + KF_R12], r12
mov [rax + KF_R13], r13
mov [rax + KF_R14], r14
mov [rax + KF_R15], r15
lea rdx, [r11+16]
mov r10, [rdx]
mov [rax + KF_ErrorCode], r10
mov r10, [rdx+8]
mov [rax + KF_Rip], r10
mov r10, [rdx+16]
mov [rax + KF_Cs], r10
mov r10, [rdx+24]
mov [rax + KF_Rflags], r10
mov r10, [rax + KF_Cs]
test r10, 3
jz err_kernel_frame
mov r10, [rdx+32]
mov [rax + KF_Rsp], r10
mov r10, [rdx+40]
mov [rax + KF_Ss], r10
jmp err_call
err_kernel_frame:
mov qword ptr [rax + KF_Rsp], 0
mov qword ptr [rax + KF_Ss], 0
err_call:
and rsp, -16
sub rsp, FAULT_CALL_SHADOW
mov rcx, rax
call KeFaultDispatchFrame
StubName ENDP
ENDM
FAULT_NOERR KeFaultDB, 1
FAULT_NOERR KeFaultNMI, 2
FAULT_NOERR KeFaultBP, 3
FAULT_NOERR KeFaultOF, 4
FAULT_NOERR KeFaultBR, 5
FAULT_NOERR KeFaultUD, 6
FAULT_NOERR KeFaultNM, 7
FAULT_ERR KeFaultDF, 8
FAULT_NOERR KeFaultCSO, 9
FAULT_ERR KeFaultTS, 10
FAULT_ERR KeFaultNP, 11
FAULT_ERR KeFaultSS, 12
FAULT_NOERR KeFaultRSV15, 15
FAULT_NOERR KeFaultMF, 16
FAULT_ERR KeFaultAC, 17
FAULT_NOERR KeFaultMC, 18
FAULT_NOERR KeFaultXM, 19
FAULT_NOERR KeFaultVE, 20
FAULT_ERR KeFaultCP, 21
FAULT_NOERR KeFaultRSV22, 22
FAULT_NOERR KeFaultRSV23, 23
FAULT_NOERR KeFaultRSV24, 24
FAULT_NOERR KeFaultRSV25, 25
FAULT_NOERR KeFaultRSV26, 26
FAULT_NOERR KeFaultRSV27, 27
FAULT_NOERR KeFaultHV, 28
FAULT_ERR KeFaultVC, 29
FAULT_ERR KeFaultSX, 30
FAULT_NOERR KeFaultRSV31, 31
EXTERN KeIrqDispatch:PROC
EXTERN KiEnterInterrupt:PROC
EXTERN KiExitInterrupt:PROC