Conditional Jump Syntax
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I have encountered some assembly x86_64 code which uses the following syntax for conditional jumps:
JE >
MOV RAX, RBX
:
JE >1
MOV RBX, RAX
1:
This is repeated throughout the procedure.
I found the code from this LDE.
https://github.com/BeaEngine/lde64
The readme says "It was implemented to be assembled with goasm assembler".
What do the characters after the JE instructions do?
How can labels repeat themselves?
How can I convert this to be compiled by MASM?
assembly
asked Nov 12 at 6:09
Will
1155
add a comment |
up vote
0
down vote
favorite
I have encountered some assembly x86_64 code which uses the following syntax for conditional jumps:
JE >
MOV RAX, RBX
:
JE >1
MOV RBX, RAX
1:
This is repeated throughout the procedure.
I found the code from this LDE.
https://github.com/BeaEngine/lde64
The readme says "It was implemented to be assembled with goasm assembler".
What do the characters after the JE instructions do?
How can labels repeat themselves?
How can I convert this to be compiled by MASM?
assembly
asked Nov 12 at 6:09
Will
1155
Which precise instruction set and which precise assembler is this? Please edit your question to clarify.
– tripleee
Nov 12 at 6:21
1
Looks like this is discussed in the goasm docs.
– David Wohlferd
Nov 12 at 7:08
@DavidWohlferd So to confirm it either looks up or down for the first match. To convert this I would need to replace all labels and jump with unique ones?
– Will
Nov 12 at 7:20
I have never used goasm, so any advice I offered beyond the docs would be a guess.
– David Wohlferd
Nov 12 at 8:07
add a comment |
up vote
0
down vote
favorite
up vote
0
down vote
favorite
I have encountered some assembly x86_64 code which uses the following syntax for conditional jumps:
JE >
MOV RAX, RBX
:
JE >1
MOV RBX, RAX
1:
This is repeated throughout the procedure.
I found the code from this LDE.
https://github.com/BeaEngine/lde64
The readme says "It was implemented to be assembled with goasm assembler".
What do the characters after the JE instructions do?
How can labels repeat themselves?
How can I convert this to be compiled by MASM?
assembly
asked Nov 12 at 6:09
Will
1155
I have encountered some assembly x86_64 code which uses the following syntax for conditional jumps:
JE >
MOV RAX, RBX
:
JE >1
MOV RBX, RAX
1:
This is repeated throughout the procedure.
I found the code from this LDE.
https://github.com/BeaEngine/lde64
The readme says "It was implemented to be assembled with goasm assembler".
What do the characters after the JE instructions do?
How can labels repeat themselves?
How can I convert this to be compiled by MASM?
assembly
assembly
asked Nov 12 at 6:09
Will
1155
asked Nov 12 at 6:09
Will
1155
edited Nov 12 at 6:27
asked Nov 12 at 6:09
Will
1155
asked Nov 12 at 6:09
Will
1155
asked Nov 12 at 6:09
Will
1155
1155
Which precise instruction set and which precise assembler is this? Please edit your question to clarify.
– tripleee
Nov 12 at 6:21
1
Looks like this is discussed in the goasm docs.
– David Wohlferd
Nov 12 at 7:08
@DavidWohlferd So to confirm it either looks up or down for the first match. To convert this I would need to replace all labels and jump with unique ones?
– Will
Nov 12 at 7:20
I have never used goasm, so any advice I offered beyond the docs would be a guess.
– David Wohlferd
Nov 12 at 8:07
add a comment |
Which precise instruction set and which precise assembler is this? Please edit your question to clarify.
– tripleee
Nov 12 at 6:21
1
Looks like this is discussed in the goasm docs.
– David Wohlferd
Nov 12 at 7:08
@DavidWohlferd So to confirm it either looks up or down for the first match. To convert this I would need to replace all labels and jump with unique ones?
– Will
Nov 12 at 7:20
I have never used goasm, so any advice I offered beyond the docs would be a guess.
– David Wohlferd
Nov 12 at 8:07
Which precise instruction set and which precise assembler is this? Please edit your question to clarify.
– tripleee
Nov 12 at 6:21
Which precise instruction set and which precise assembler is this? Please edit your question to clarify.
– tripleee
Nov 12 at 6:21
1
1
Looks like this is discussed in the goasm docs.
– David Wohlferd
Nov 12 at 7:08
Looks like this is discussed in the goasm docs.
– David Wohlferd
Nov 12 at 7:08
@DavidWohlferd So to confirm it either looks up or down for the first match. To convert this I would need to replace all labels and jump with unique ones?
– Will
Nov 12 at 7:20
@DavidWohlferd So to confirm it either looks up or down for the first match. To convert this I would need to replace all labels and jump with unique ones?
– Will
Nov 12 at 7:20
I have never used goasm, so any advice I offered beyond the docs would be a guess.
– David Wohlferd
Nov 12 at 8:07
I have never used goasm, so any advice I offered beyond the docs would be a guess.
– David Wohlferd
Nov 12 at 8:07
add a comment |
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Which precise instruction set and which precise assembler is this? Please edit your question to clarify.
– tripleee
Nov 12 at 6:21
1
Looks like this is discussed in the goasm docs.
– David Wohlferd
Nov 12 at 7:08
@DavidWohlferd So to confirm it either looks up or down for the first match. To convert this I would need to replace all labels and jump with unique ones?
– Will
Nov 12 at 7:20
I have never used goasm, so any advice I offered beyond the docs would be a guess.
– David Wohlferd
Nov 12 at 8:07