Espresso 0.0.0e

isr.old.asm

@@ -0,0 +1,97 @@
+
+[BITS 32]
+[GLOBAL isr_stub_table]
+
+section .text
+
+; Common exception handler entry point
+isr_common_handler:
+    pusha                  ; Push general-purpose registers
+    push ds
+    push es
+    push fs
+    push gs
+
+    ; Load known-good segment selectors
+    mov ax, 0x10
+    mov ds, ax
+    mov es, ax
+    mov fs, ax
+    mov gs, ax
+
+    ; Print exception number and error code
+    ; You can insert direct port writes or call kernel logging function here
+    ; For now, just hang
+.halt:
+    cli
+    hlt
+    jmp .halt
+
+    ; If you want to later restore:
+    pop gs
+    pop fs
+    pop es
+    pop ds
+    popa
+    add esp, 8             ; clean up int_no + err_code
+    iret
+
+; Macro: for exceptions with error code
+%macro isr_err_stub 1
+isr_stub_%+%1:
+    cli
+    push dword %1          ; interrupt number
+    jmp isr_common_handler
+%endmacro
+
+; Macro: for exceptions without error code
+%macro isr_no_err_stub 1
+isr_stub_%+%1:
+    cli
+    push dword 0           ; fake error code
+    push dword %1          ; interrupt number
+    jmp isr_common_handler
+%endmacro
+
+; Define all 32 exception stubs
+isr_no_err_stub 0
+isr_no_err_stub 1
+isr_no_err_stub 2
+isr_no_err_stub 3
+isr_no_err_stub 4
+isr_no_err_stub 5
+isr_no_err_stub 6
+isr_no_err_stub 7
+isr_err_stub    8
+isr_no_err_stub 9
+isr_err_stub    10
+isr_err_stub    11
+isr_err_stub    12
+isr_err_stub    13
+isr_err_stub    14
+isr_no_err_stub 15
+isr_no_err_stub 16
+isr_err_stub    17
+isr_no_err_stub 18
+isr_no_err_stub 19
+isr_no_err_stub 20
+isr_no_err_stub 21
+isr_no_err_stub 22
+isr_no_err_stub 23
+isr_no_err_stub 24
+isr_no_err_stub 25
+isr_no_err_stub 26
+isr_no_err_stub 27
+isr_no_err_stub 28
+isr_no_err_stub 29
+isr_err_stub    30
+isr_no_err_stub 31
+
+; Create jump table
+isr_stub_table:
+%assign i 0
+%rep 32
+    dd isr_stub_%+i
+%assign i i+1
+%endrep
+