move out some entry code

1 files changed, 230 insertions, 0 deletions

diff --git a/asm/entry.asm b/asm/entry.asm
new file mode 100644
index 0000000..f2ab9b6
--- /dev/null
+++ b/asm/entry.asm
@@ -0,0 +1,230 @@
+global entry
+
+extern loc_004588b0
+extern __imp__GetModuleHandleA@4
+extern _LpCmdLine
+extern memset
+extern rich4_main
+extern __ThreadDataSize
+extern fcn_0045abc6
+extern _GetThreadPtr
+extern __init_stack_limits
+extern __NewExceptionFilter
+extern __NTInit
+extern ref_00488f8c
+extern ref_00489330
+extern ref_004898ca
+extern ref_00489900
+extern ref_004991c0
+extern fcn_0045ac2a
+
+section .text
+
+entry:
+push ebx
+push ebp
+mov ebp, esp
+sub esp, 8
+mov eax, 1 ; INIT_PRIORITY_THREAD
+call __InitRtns  ; call 0x45abd6
+mov eax, dword [__ThreadDataSize]  ; mov eax, dword [0x4894b0]
+add eax, 3
+and al, 0xfc
+sub esp, eax
+mov ebx, esp
+mov edx, dword [__ThreadDataSize]  ; mov edx, dword [0x4894b0]
+push edx
+push 0
+push ebx
+call memset  ; call 0x456f60
+add esp, 0xc
+mov eax, dword [__ThreadDataSize]  ; mov eax, dword [0x4894b0]
+push ebx
+mov dword [ebx + 0xf0], eax
+lea eax, [ebp - 8]
+push eax
+call __NTMainInit  ; call 0x458859
+mov ebx, dword [ref_00489334]  ; mov ebx, dword [0x489334]
+add ebx, 3
+add esp, 8
+and bl, 0xfc
+call fcn_0045ada0  ; call 0x45ada0
+cmp ebx, eax
+jae short loc_00458d61  ; jae 0x458d61
+push ebx
+call __GRO  ; call 0x45aded
+mov eax, dword [ref_00489334]  ; mov eax, dword [0x489334]
+add eax, 3
+and al, 0xfc
+sub esp, eax
+mov eax, esp
+jmp short loc_00458d63  ; jmp 0x458d63
+
+loc_00458d61:
+xor eax, eax
+
+loc_00458d63:
+mov ebx, dword [ref_00489334]  ; mov ebx, dword [0x489334]
+add eax, ebx
+mov dword [ref_00489338], eax  ; mov dword [0x489338], eax
+push 0xa
+mov ebx, dword [_LpCmdLine]  ; mov ebx, dword [0x489310]
+push ebx
+push 0
+push 0
+call dword [cs:__imp__GetModuleHandleA@4]  ; ucall: call dword cs:[0x4623bc]
+push eax
+call rich4_main  ; call 0x401b9c
+push eax
+call fcn_0045ae23  ; call 0x45ae23
+add esp, 4
+mov esp, ebp
+pop ebp
+pop ebx
+ret
+
+__GRO:
+push eax
+push ebx
+mov eax, dword [esp + 0xc]
+mov ebx, 0xfffffffc
+
+loc_0045adf8:
+mov dword [esp + ebx], ebx
+sub ebx, 0x1000
+sub eax, 0x1000
+jg short loc_0045adf8  ; jg 0x45adf8
+pop ebx
+pop eax
+ret 4
+
+; __NTMainInit(REGISTRATION_RECORD *rr, thread_data *tdata)
+__NTMainInit:
+push ebx
+push 0
+call dword [cs:__imp__GetModuleHandleA@4]  ; ucall: call dword cs:[0x4623bc]
+push eax
+mov edx, dword [esp + 0x10]
+push edx
+push 0
+call __NTInit  ; call 0x4585ef
+add esp, 0xc
+push ref_00489330  ; push 0x489330
+call dword [_GetThreadPtr]  ; ucall: call dword [0x488f4c]
+push eax
+call __init_stack_limits  ; call 0x45a666
+add esp, 8
+mov ebx, dword [esp + 8]
+push ebx
+call __NewExceptionFilter  ; call 0x45ab58
+add esp, 4
+mov eax, 0x21
+call __InitRtns  ; call 0x45abd6
+call dword [ref_00488f8c]  ; ucall: call dword [0x488f8c]
+mov eax, 0xff
+call __InitRtns  ; call 0x45abd6
+pop ebx
+ret
+
+__InitRtns:
+push ebx
+push esi
+push es
+sub esp, 4
+mov esi, ref_00489900  ; mov esi, 0x489900
+mov byte [esp], al
+
+loc_0045abe4:
+mov eax, ref_004898ca  ; mov eax, 0x4898ca
+mov dl, byte [esp]
+mov ebx, esi
+
+loc_0045abee:
+cmp eax, ref_00489900  ; cmp eax, 0x489900
+jae short loc_0045ac0a  ; jae 0x45ac0a
+cmp byte [eax], 2
+je short loc_0045ac05  ; je 0x45ac05
+mov cl, byte [eax + 1]
+cmp dl, cl
+jb short loc_0045ac05  ; jb 0x45ac05
+mov ebx, eax
+mov dl, cl
+
+loc_0045ac05:
+add eax, 6
+jmp short loc_0045abee  ; jmp 0x45abee
+
+loc_0045ac0a:
+cmp ebx, ref_00489900  ; cmp ebx, 0x489900
+je short loc_0045ac23  ; je 0x45ac23
+lea eax, [ebx + 2]
+push eax
+call fcn_0045abc6  ; call 0x45abc6
+add esp, 4
+mov byte [ebx], 2
+jmp short loc_0045abe4  ; jmp 0x45abe4
+
+loc_0045ac23:
+add esp, 4
+pop es
+pop esi
+pop ebx
+ret
+
+fcn_0045ada0:
+push ebx
+call dword [_GetThreadPtr]  ; ucall: call dword [0x488f4c]
+mov ebx, eax
+mov eax, esp
+sub eax, dword [ebx]
+pop ebx
+ret
+
+fcn_0045ae22:
+ret
+
+fcn_0045ae23:
+call dword [ref_004894c8]  ; ucall: call dword [0x4894c8]
+cmp byte [ref_004991c0], 0  ; cmp byte [0x4991c0], 0
+jne short loc_0045ae41  ; jne 0x45ae41
+mov edx, 0xff
+mov eax, 0x10
+call fcn_0045ac2a  ; call 0x45ac2a
+
+loc_0045ae41:
+mov edx, dword [esp + 4]
+push edx
+call fcn_0045ae4f  ; call 0x45ae4f
+add esp, 4
+ret
+
+fcn_0045ae4f:
+push ebx
+call dword [ref_004894c8]  ; ucall: call dword [0x4894c8]
+call dword [ref_004894cc]  ; ucall: call dword [0x4894cc]
+cmp dword [ref_004891ec], 0  ; cmp dword [0x4891ec], 0
+je short loc_0045ae6b  ; je 0x45ae6b
+call dword [ref_004891ec]  ; ucall: call dword [0x4891ec]
+
+loc_0045ae6b:
+mov ebx, dword [esp + 8]
+push ebx
+jmp near loc_004588b0  ; jmp 0x4588b0
+
+section .data
+
+ref_004891ec:
+dd 0x00000000
+
+ref_00489334:
+dd 0x00000000
+
+ref_00489338:
+dd 0x00000000
+
+ref_004894c8:  ; may contain a jump table
+dd fcn_0045ae22
+
+ref_004894cc:  ; may contain a jump table
+dd fcn_0045ae22
+