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* doc/c-alpha.texi: Add docs for tls relocations.

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Richard Henderson
2002-05-30 22:34:41 +00:00
parent f7ea7ef2ee
commit 1c5cec28bb
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2
gas/ChangeLog
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@ -23,6 +23,8 @@
(emit_insn): Handle TLS relocations. (emit_insn): Handle TLS relocations.
(ldX_op): Remove. (ldX_op): Remove.
* doc/c-alpha.texi: Add docs for tls relocations.
2002-05-30 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de> 2002-05-30 Thiemo Seufer <seufer@csv.ica.uni-stuttgart.de>
* config/tc-mips.c (mips_gprel_offset): New variable. * config/tc-mips.c (mips_gprel_offset): New variable.

54
gas/doc/c-alpha.texi
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@ -216,6 +216,19 @@ beq $27,is_undef !lituse_addr!1
jsr $26,($27),foo !lituse_jsr!1 jsr $26,($27),foo !lituse_jsr!1
@end example @end example
@item !lituse_tlsgd!@var{N}
Used with a register branch format instruction to indicate that the
literal is the call to @code{__tls_get_addr} used to compute the
address of the thread-local storage variable whose descriptor was
loaded with @code{!tlsgd!@var{N}}.
@item !lituse_tlsldm!@var{N}
Used with a register branch format instruction to indicate that the
literal is the call to @code{__tls_get_addr} used to compute the
address of the base of the thread-local storage block for the current
module. The descriptor for the module must have been loaded with
@code{!tlsldm!@var{N}}.
@item !gpdisp!@var{N} @item !gpdisp!@var{N}
Used with @code{ldah} and @code{lda} to load the GP from the current Used with @code{ldah} and @code{lda} to load the GP from the current
address, a-la the @code{ldgp} macro. The source register for the address, a-la the @code{ldgp} macro. The source register for the
@ -248,6 +261,47 @@ target address. The referenced symbol must have the same GP as the
source object file, and it must be declared to either not use @code{$27} source object file, and it must be declared to either not use @code{$27}
or perform a standard GP load in the first two instructions via the or perform a standard GP load in the first two instructions via the
@code{.prologue} directive. @code{.prologue} directive.
@item !tlsgd
@itemx !tlsgd!@var{N}
Used with an @code{lda} instruction to load the address of a TLS
descriptor for a symbol in the GOT.
The sequence number @var{N} is optional, and if present it used to
pair the descriptor load with both the @code{literal} loading the
address of the @code{__tls_get_addr} function and the @code{lituse_tlsgd}
marking the call to that function.
For proper relaxation, both the @code{tlsgd}, @code{literal} and
@code{lituse} relocations must be in the same extended basic block.
That is, the relocation with the lowest address must be executed
first at runtime.
@item !tlsldm
@itemx !tlsldm!@var{N}
Used with an @code{lda} instruction to load the address of a TLS
descriptor for the current module in the GOT.
Similar in other respects to @code{tlsgd}.
@item !gotdtprel
Used with an @code{ldq} instruction to load the offset of the TLS
symbol within its module's thread-local storage block. Also known
as the dynamic thread pointer offset or dtp-relative offset.
@item !dtprelhi
@itemx !dtprello
@itemx !dtprel
Like @code{gprel} relocations except they compute dtp-relative offsets.
@item !gottprel
Used with an @code{ldq} instruction to load the offset of the TLS
symbol from the thread pointer. Also known as the tp-relative offset.
@item !tprelhi
@itemx !tprello
@itemx !tprel
Like @code{gprel} relocations except they compute tp-relative offsets.
@end table @end table
@node Alpha Floating Point @node Alpha Floating Point