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* [Bug target/47631] New: Support native TLS on Tru64 UNIX
@ 2011-02-07 12:54 ro at gcc dot gnu.org
2012-03-09 16:12 ` [Bug target/47631] " ro at gcc dot gnu.org
0 siblings, 1 reply; 2+ messages in thread
From: ro at gcc dot gnu.org @ 2011-02-07 12:54 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47631
Summary: Support native TLS on Tru64 UNIX
Product: gcc
Version: 4.6.0
Status: UNCONFIRMED
Severity: enhancement
Priority: P3
Component: target
AssignedTo: unassigned@gcc.gnu.org
ReportedBy: ro@gcc.gnu.org
CC: rth@gcc.gnu.org
Host: alpha-dec-osf5.1b
Target: alpha-dec-osf5.1b
Build: alpha-dec-osf5.1b
I've just noticed that Tru64 UNIX does have native support for TLS, obviously
already in V4.0. The details are described in the Object File and Symbol Table
Format Specification:
http://h30097.www3.hp.com/docs/base_doc/DOCUMENTATION/V51B_HTML/SUPPDOCS/OBJSPEC/TITLE.HTM
especially
3.3.9 Thread Local Storage (TLS) Data
4.3.3.7 TLS Relocations
4.3.4.26 R_TLS_LITERAL
4.3.4.27 R_TLS_HIGH
4.3.4.28 R_TLS_LOW
8.3.5 Finding Thread Local Storage (TLS) Symbols
13.3.5 TLS Symbols
Compiling th example in 4.3.4.26
__declspec(thread) long foo;
main(){
foo = 2;
}
with cc -S, I get
.set noat
.set noreorder
.tlscomm foo 8
.rdata
$$1:
.extern __tlsoffset 8
.text
.arch generic
.align 4
.file 1 "osf-tls.c"
.loc 1 2
# 2 main(){
.globl main
.ent main
.loc 1 2
main:
.context full
ldah $gp, ($27)!gpdisp!1
lda $gp, ($gp)!gpdisp!1
.frame $sp, 0, $26
.prologue 1
L$2:
.loc 1 3
# 3 foo = 2;
call_pal 0x9E # rdunique
# 000003
ldq $0, 96($0)
ldq $28, __tlsoffset($gp)!tlsliteral!2
addq $0, $28, $0
ldq $0, ($0)
mov 2, $3
ldah $0, foo($0)!tlshigh!3
stq $3, foo($0)!tlslow!3
.loc 1 4
# 4 }
mov $31, $0
# 000004
unop
ret ($26)
.end main
.loc 1 2
A port will probably be somewhat different from an ELF port since there aren't
the 4 different access models.
^ permalink raw reply [flat|nested] 2+ messages in thread
* [Bug target/47631] Support native TLS on Tru64 UNIX
2011-02-07 12:54 [Bug target/47631] New: Support native TLS on Tru64 UNIX ro at gcc dot gnu.org
@ 2012-03-09 16:12 ` ro at gcc dot gnu.org
0 siblings, 0 replies; 2+ messages in thread
From: ro at gcc dot gnu.org @ 2012-03-09 16:12 UTC (permalink / raw)
To: gcc-bugs
http://gcc.gnu.org/bugzilla/show_bug.cgi?id=47631
Rainer Orth <ro at gcc dot gnu.org> changed:
What |Removed |Added
----------------------------------------------------------------------------
Status|UNCONFIRMED |RESOLVED
Resolution| |WONTFIX
--- Comment #1 from Rainer Orth <ro at gcc dot gnu.org> 2012-03-09 16:11:41 UTC ---
Given that the Tru64 UNIX port is about to be removed in 4.8 and the TLS model
differs sufficiently from the ELF one, this won't be fixed anywhere.
Rainer
^ permalink raw reply [flat|nested] 2+ messages in thread
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2011-02-07 12:54 [Bug target/47631] New: Support native TLS on Tru64 UNIX ro at gcc dot gnu.org
2012-03-09 16:12 ` [Bug target/47631] " ro at gcc dot gnu.org
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