Some oddities with a struct and a local var

[theunknownguy]

Hello,

first of all, a big thank you for everyone who helped me (qWord, MichaelW and jj2007)!
The program is working now but let me resume to see if I have understood everything:

- if I want to pass a structure to a PROC, I have three possibilites:

• 1. pass the address of the structure (by reference), address must be in a register
  1.a. qWord:
  assume esi:PTR myStruct
  mov [esi].x, eax
  assume esi:nothing
  


• 1.b. MichealW:
  mov [esi], ADDR myStruct
  mov [esi].myStruct.x, eax
  

• 2. jj2007: pass the structure itself (by value), address must be in a register
  - parameter is myStruct itself
  mov myStruct.x, eax
  - changes are LOCAL to PROC
  

brgds

cobold

- Local structure:

Code Select Expand


LOCAL MyStruct:HEY_STRUCT
mov MyStruct.Hello, 1

- Assumed struct:

Code Select Expand

assume esi:ptr HEY_STRUCT
lea esi, MyStruct
mov [esi].Hello, 1
assume esi: NOTHING


- Global initialised <>:

Code Select Expand

.Data
HeyStruct HEY_STRUCT <>
.Code
mov HeyStruct.Hello, 1

- Linked Struct:

Code Select Expand

COBOLD_STRUCT struct
Hello byte ?

HEY_STRUCT struct
Cobold COBOLD_STRUCT <?>


.Code
assume esi:ptr HEY_STRUCT
lea esi, MyStruct
mov [esi].Cobold.Hello, 1



Interpret "Addr" has: "lea eax, Address" and Offset is calculated by preprocessor if i am not wrong.