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Question about keywords and declarations in assembly code
- From: spr03 at uow dot edu dot au
- To: binutils at sources dot redhat dot com
- Date: Tue, 14 Oct 2003 01:05:10 +1000
- Subject: Question about keywords and declarations in assembly code
Hi,
I've been looking at the assembly code that is produced by
gcc and have a few questions about some of the declarations
and keywords found in the assembly file.
When declaring variables in ".Lfe1", what does the following
mean?
.Lfe1:
.comm aVariable,4,1
.comm anotherVariable,4,1
And what function does ".Lfe1" perform?
I can see that the second number means the number of bytes
this variable should take in memory - but what does the
second number mean, and what does ".comm" stand for?
When a name of a function is declared "extern" in assembly
what does this mean? i.e.
extern aFunction
When there is ".sect" , ".text" , and ".type" at the top of
the main declaration what do these mean? i.e.
.sect .text
.type main,@function
I'm guessing that the "main,@function" is saying that main
is a function - is this correct?
The ".globl" keyword I guess means that this function can be
called from anywhere in the assembly code - is this correct?
i.e.
.globl aFunction
Is there an online manual where I can find answers to
questions like these above??
Thankyou for your help with these questions, I really
appreciate it.
Simon Reynolds.