diff options
Diffstat (limited to 'core/pxelinux.asm')
| -rw-r--r-- | core/pxelinux.asm | 39 |
1 files changed, 18 insertions, 21 deletions
diff --git a/core/pxelinux.asm b/core/pxelinux.asm index b8077fd9..06e52061 100644 --- a/core/pxelinux.asm +++ b/core/pxelinux.asm @@ -290,29 +290,8 @@ _start1: extern pxe_fs_ops mov eax,pxe_fs_ops pm_call fs_init - jmp next ; -; Plan C, because it must be in real mode, we set it here -; - global plan_c -plan_c: - - ; Plan C: PXENV+ structure via INT 1Ah AX=5650h - mov ax, 5650h -%if USE_PXE_PROVIDED_STACK == 0 - lss sp,[InitStack] -%endif - int 1Ah ; May trash regs -%if USE_PXE_PROVIDED_STACK == 0 - lss esp,[BaseStack] -%endif - sti ; Work around Etherboot bug - ret - - -next: -; ; Common initialization code ; %include "cpuinit.inc" @@ -483,6 +462,24 @@ PXEEntry equ pxenv.jump+1 PXEStatus resb 2 + section .text16 +; +; Invoke INT 1Ah on the PXE stack. This is used by the "Plan C" method +; for finding the PXE entry point. +; + global pxe_int1a +pxe_int1a: +%if USE_PXE_PROVIDED_STACK == 0 + mov [cs:PXEStack],sp + mov [cs:PXEStack+2],ss + lss sp,[cs:InitStack] +%endif + int 1Ah ; May trash registers +%if USE_PXE_PROVIDED_STACK == 0 + lss sp,[cs:PXEStack] +%endif + ret + ; ; TimeoutTable: list of timeouts (in 18.2 Hz timer ticks) ; |