Difference between revisions of "Assembler:Commands:CALL"
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'''command''' call ''mnemonic'' ''operand'' | '''command''' call ''mnemonic'' ''operand'' | ||
| − | Calls the given operand (address or function) | + | Calls the given operand (address or function), jumps to the given operand then returns. |
| − | + | ||
| − | A RET must be hit for a CALL to work properly, best to use JMPs if unsure. | + | Note: A RET must be hit for a CALL to work properly, best to use JMPs if unsure. |
=== Command Parameters === | === Command Parameters === | ||
| Line 76: | Line 76: | ||
add [rax],al | add [rax],al | ||
db 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 | db 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 | ||
| − | |||
[[File:Assembler.CALL.01.png]] | [[File:Assembler.CALL.01.png]] | ||
Revision as of 09:50, 13 March 2017
command call mnemonic operand
Calls the given operand (address or function), jumps to the given operand then returns.
Note: A RET must be hit for a CALL to work properly, best to use JMPs if unsure.
Command Parameters
| Parameter | Description |
|---|---|
| mnemonic OPTIONAL | The preferred size of the assembled address |
| operand | The address or symbol to call |
Examples
call +1A // Call from end of command to +1A (hex).
call 00123ABC // Call the address.
call 0000123456ABCDEF // Call the address.
call eax // Call the value of eax.
call rax // Call the value of rax.
call someSymbol // Call the user defined symbol.
call someLabel // Call the label.
call short someLabel // Call the label with short byte code.
call long someLabel // Call the label with full address.
call @b // Call back the closest anonymous label (@@:).
call @f // Call forward the closest anonymous label (@@:).
Running this script in 64 bit mode:
globalAlloc(memTest, 0x200)
label(testLbl)
memTest:
add [rax],al // db 00 00
@@:
add [rax],al
ret
call short @b
call short @f
add [rax],al
@@:
add [rax],al
ret
add [rax],al
call short -8
call short +2
add [rax],al
testLbl:
add [rax],al
ret
call 01160002
add [rax],al
call rax
add [rax],al
call memTest
add [rax],al
call testLbl
add [rax],al
call short testLbl
add [rax],al
call long testLbl
add [rax],al
db 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90 90
