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| author | Richard Qin <richard.qin.x@gmail.com> | 2026-11-08 07:54:02 +0800 |
|---|---|---|
| committer | Richard Qin <richard.qin.x@gmail.com> | 2026-11-08 07:54:02 +0800 |
| commit | e939a810a401b389a398aa10499e7be142bf45ca (patch) | |
| tree | 1b84fbac69be10f9385f62fd4dc04975b4bfd493 /mubios/arch | |
| parent | bb20921d00c770cb30bb85a300423d9062a94d91 (diff) | |
| download | rcc-project-e939a810a401b389a398aa10499e7be142bf45ca.tar.gz rcc-project-e939a810a401b389a398aa10499e7be142bf45ca.tar.xz | |
[mubios] Extend registers from 16-bit to 32-bit
Signed-off-by: Richard Qin <richard.qin.x@gmail.com>
Diffstat (limited to 'mubios/arch')
| -rw-r--r-- | mubios/arch/interrupt.S | 30 |
1 files changed, 7 insertions, 23 deletions
diff --git a/mubios/arch/interrupt.S b/mubios/arch/interrupt.S index 0822b1a..b3a461b 100644 --- a/mubios/arch/interrupt.S +++ b/mubios/arch/interrupt.S @@ -53,21 +53,11 @@ int1a_return: .type \name, @function \name: - # Build struct bios_regs on the interrupted real-mode stack. - push 0 - push es + # Build struct bios_regs from the pushad and segment frames. push ds - push bp - push di - push si - push dx - push cx - push bx - push ax - - mov bp, sp - mov ax, word ptr [bp + 24] - mov word ptr [bp + 18], ax + push es + .byte 0x66 + pushad # ESI = linear address of struct bios_regs. movzx esi, sp @@ -88,16 +78,10 @@ int1a_return: call enter_protected_service # Restore the context modified by the C service. - pop ax - pop bx - pop cx - pop dx - pop si - pop di - pop bp - pop ds + .byte 0x66 + popad pop es - add sp, 2 + pop ds iret .endm |