mirror of
https://github.com/darlinghq/darling-gdb.git
synced 2024-12-05 10:57:57 +00:00
183 lines
6.3 KiB
Plaintext
183 lines
6.3 KiB
Plaintext
@c Copyright 2002, 2003, 2005
|
|
@c Free Software Foundation, Inc.
|
|
@c Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
|
|
@c This is part of the GAS manual.
|
|
@c For copying conditions, see the file as.texinfo.
|
|
|
|
@ifset GENERIC
|
|
@page
|
|
@node IA-64-Dependent
|
|
@chapter IA-64 Dependent Features
|
|
@end ifset
|
|
|
|
@ifclear GENERIC
|
|
@node Machine Dependencies
|
|
@chapter IA-64 Dependent Features
|
|
@end ifclear
|
|
|
|
@cindex IA-64 support
|
|
@menu
|
|
* IA-64 Options:: Options
|
|
* IA-64 Syntax:: Syntax
|
|
@c * IA-64 Floating Point:: Floating Point // to be written
|
|
@c * IA-64 Directives:: IA-64 Machine Directives // to be written
|
|
* IA-64 Opcodes:: Opcodes
|
|
@end menu
|
|
|
|
@node IA-64 Options
|
|
@section Options
|
|
@cindex IA-64 options
|
|
@cindex options for IA-64
|
|
|
|
@table @option
|
|
@cindex @code{-mconstant-gp} command line option, IA-64
|
|
|
|
@item -mconstant-gp
|
|
This option instructs the assembler to mark the resulting object file
|
|
as using the ``constant GP'' model. With this model, it is assumed
|
|
that the entire program uses a single global pointer (GP) value. Note
|
|
that this option does not in any fashion affect the machine code
|
|
emitted by the assembler. All it does is turn on the EF_IA_64_CONS_GP
|
|
flag in the ELF file header.
|
|
|
|
@item -mauto-pic
|
|
This option instructs the assembler to mark the resulting object file
|
|
as using the ``constant GP without function descriptor'' data model.
|
|
This model is like the ``constant GP'' model, except that it
|
|
additionally does away with function descriptors. What this means is
|
|
that the address of a function refers directly to the function's code
|
|
entry-point. Normally, such an address would refer to a function
|
|
descriptor, which contains both the code entry-point and the GP-value
|
|
needed by the function. Note that this option does not in any fashion
|
|
affect the machine code emitted by the assembler. All it does is
|
|
turn on the EF_IA_64_NOFUNCDESC_CONS_GP flag in the ELF file header.
|
|
|
|
@item -milp32
|
|
@item -milp64
|
|
@item -mlp64
|
|
@item -mp64
|
|
These options select the data model. The assembler defaults to @code{-mlp64}
|
|
(LP64 data model).
|
|
|
|
@item -mle
|
|
@item -mbe
|
|
These options select the byte order. The @code{-mle} option selects little-endian
|
|
byte order (default) and @code{-mbe} selects big-endian byte order. Note that
|
|
IA-64 machine code always uses little-endian byte order.
|
|
|
|
@item -munwind-check=warning
|
|
@item -munwind-check=error
|
|
These options control what the assembler will do when performing
|
|
consistency checks on unwind directives. @code{-munwind-check=warning}
|
|
will make the assembler issue a warning when an unwind directive check
|
|
fails. This is the default. @code{-munwind-check=error} will make the
|
|
assembler issue an error when an unwind directive check fails.
|
|
|
|
@item -mhint.b=ok
|
|
@item -mhint.b=warning
|
|
@item -mhint.b=error
|
|
These options control what the assembler will do when the @samp{hint.b}
|
|
instruction is used. @code{-mhint.b=ok} will make the assembler accept
|
|
@samp{hint.b}. @code{-mint.b=warning} will make the assembler issue a
|
|
warning when @samp{hint.b} is used. @code{-mhint.b=error} will make
|
|
the assembler treat @samp{hint.b} as an error, which is the default.
|
|
|
|
@item -x
|
|
@item -xexplicit
|
|
These options turn on dependency violation checking.
|
|
|
|
@item -xauto
|
|
This option instructs the assembler to automatically insert stop bits where necessary
|
|
to remove dependency violations. This is the default mode.
|
|
|
|
@item -xnone
|
|
This option turns off dependency violation checking.
|
|
|
|
@item -xdebug
|
|
This turns on debug output intended to help tracking down bugs in the dependency
|
|
violation checker.
|
|
|
|
@item -xdebugn
|
|
This is a shortcut for -xnone -xdebug.
|
|
|
|
@item -xdebugx
|
|
This is a shortcut for -xexplicit -xdebug.
|
|
|
|
@end table
|
|
|
|
@cindex IA-64 Syntax
|
|
@node IA-64 Syntax
|
|
@section Syntax
|
|
The assembler syntax closely follows the IA-64 Assembly Language
|
|
Reference Guide.
|
|
|
|
@menu
|
|
* IA-64-Chars:: Special Characters
|
|
* IA-64-Regs:: Register Names
|
|
* IA-64-Bits:: Bit Names
|
|
@c * IA-64-Relocs:: Relocations // to be written
|
|
@end menu
|
|
|
|
@node IA-64-Chars
|
|
@subsection Special Characters
|
|
|
|
@cindex line comment character, IA-64
|
|
@cindex IA-64 line comment character
|
|
@samp{//} is the line comment token.
|
|
|
|
@cindex line separator, IA-64
|
|
@cindex statement separator, IA-64
|
|
@cindex IA-64 line separator
|
|
@samp{;} can be used instead of a newline to separate statements.
|
|
|
|
@node IA-64-Regs
|
|
@subsection Register Names
|
|
@cindex IA-64 registers
|
|
@cindex register names, IA-64
|
|
|
|
The 128 integer registers are referred to as @samp{r@var{n}}.
|
|
The 128 floating-point registers are referred to as @samp{f@var{n}}.
|
|
The 128 application registers are referred to as @samp{ar@var{n}}.
|
|
The 128 control registers are referred to as @samp{cr@var{n}}.
|
|
The 64 one-bit predicate registers are referred to as @samp{p@var{n}}.
|
|
The 8 branch registers are referred to as @samp{b@var{n}}.
|
|
In addition, the assembler defines a number of aliases:
|
|
@samp{gp} (@samp{r1}), @samp{sp} (@samp{r12}), @samp{rp} (@samp{b0}),
|
|
@samp{ret0} (@samp{r8}), @samp{ret1} (@samp{r9}), @samp{ret2} (@samp{r10}),
|
|
@samp{ret3} (@samp{r9}), @samp{farg@var{n}} (@samp{f8+@var{n}}), and
|
|
@samp{fret@var{n}} (@samp{f8+@var{n}}).
|
|
|
|
For convenience, the assembler also defines aliases for all named application
|
|
and control registers. For example, @samp{ar.bsp} refers to the register
|
|
backing store pointer (@samp{ar17}). Similarly, @samp{cr.eoi} refers to
|
|
the end-of-interrupt register (@samp{cr67}).
|
|
|
|
@node IA-64-Bits
|
|
@subsection IA-64 Processor-Status-Register (PSR) Bit Names
|
|
@cindex IA-64 Processor-status-Register bit names
|
|
@cindex PSR bits
|
|
@cindex bit names, IA-64
|
|
|
|
The assembler defines bit masks for each of the bits in the IA-64
|
|
processor status register. For example, @samp{psr.ic} corresponds to
|
|
a value of 0x2000. These masks are primarily intended for use with
|
|
the @samp{ssm}/@samp{sum} and @samp{rsm}/@samp{rum}
|
|
instructions, but they can be used anywhere else where an integer
|
|
constant is expected.
|
|
|
|
@node IA-64 Opcodes
|
|
@section Opcodes
|
|
For detailed information on the IA-64 machine instruction set, see the
|
|
@c Attempt to work around a very overfull hbox.
|
|
@iftex
|
|
IA-64 Assembly Language Reference Guide available at
|
|
@smallfonts
|
|
@example
|
|
http://developer.intel.com/design/itanium/arch_spec.htm
|
|
@end example
|
|
@textfonts
|
|
@end iftex
|
|
@ifnottex
|
|
@uref{http://developer.intel.com/design/itanium/arch_spec.htm,IA-64 Architecture Handbook}.
|
|
@end ifnottex
|