An Intel syntax indirect memory reference of the form
section:[base + index*scale + disp]
is translated into the AT&T syntax
section:disp(base, index, scale)
where base and index are the optional 32-bit base and
index registers, disp is the optional displacement, and
scale, taking the values 1, 2, 4, and 8, multiplies index
to calculate the address of the operand. If no scale is
specified, scale is taken to be 1. section specifies the
optional section register for the memory operand, and may override the
default section register (see a 80386 manual for section register
defaults). Note that section overrides in AT&T syntax must have
be preceded by a `%'. If you specify a section override which
coincides with the default section register,
as does not
output any section register override prefixes to assemble the given
instruction. Thus, section overrides can be specified to emphasize which
section register is used for a given memory operand.
Here are some examples of Intel and AT&T style memory references:
Absolute (as opposed to PC relative) call and jump operands must be
prefixed with `*'. If no `*' is specified,
always chooses PC relative addressing for jump/call labels.
Any instruction that has a memory operand must specify its size (byte, word, or long) with an opcode suffix (`b', `w', or `l', respectively).
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