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/* Thread-local storage handling in the ELF dynamic linker. NDS32 version.
Copyright (C) 2006-2013 Free Software Foundation, Inc.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library. If not, see
<http://www.gnu.org/licenses/>. */
#include <sysdep.h>
#if defined __UCLIBC_HAS_TLS__
#include <tls.h>
#include "tlsdesc.h"
.text
.hidden _dl_tlsdesc_return
.global _dl_tlsdesc_return
.type _dl_tlsdesc_return,#function
cfi_startproc
.align 2
_dl_tlsdesc_return:
lwi $r0, [$r0 + 4]
add $r0, $r0, $r25
ret
cfi_endproc
.size _dl_tlsdesc_return, .-_dl_tlsdesc_return
#ifdef SHARED
.hidden _dl_tlsdesc_dynamic
.global _dl_tlsdesc_dynamic
.type _dl_tlsdesc_dynamic,#function
cfi_startproc
.pic
/*
The assembly code that follows is a rendition of the following
C code, hand-optimized a little bit.
ptrdiff_t
_dl_tlsdesc_dynamic(struct tlsdesc *tdp)
{
struct tlsdesc_dynamic_arg *td = tdp->argument.pointer;
dtv_t *dtv = (dtv_t *)THREAD_DTV();
if (__builtin_expect (td->gen_count <= dtv[0].counter
&& dtv[td->tlsinfo.ti_module].pointer.val
!= TLS_DTV_UNALLOCATED,
1))
return dtv[td->tlsinfo.ti_module].pointer.val +
td->tlsinfo.ti_offset - __builtin_thread_pointer();
return __tls_get_addr (&td->tlsinfo) - __builtin_thread_pointer();
}
*/
.align 2
_dl_tlsdesc_dynamic:
lwi $r0, [$r0 + 4]
lwi $r1, [$r0 + #TLSDESC_GEN_COUNT] /* $r0=td $r1=td->gen_count*/
lwi $r2, [$r25 + #DTV_OFFSET] /* $r2=&dtv[0]*/
lwi $r3, [$r2]
sub $r1, $r1, $r3
bgtz $r1, 2f
lwi $r3, [$r0 + #TLSDESC_MODID] /* r3=module id */
slli $r3, $r3, #3 /* r3=module offset=module id*8(byte) */
lw $r3, [$r2 + $r3] /* r3=&dtc[module ID]=&dtv[0]+ module offset*/
movi $r1, #-1
beq $r3, $r1, 2f
lwi $r1, [$r0 + #TLSDESC_MODOFF]
add $r0, $r3, $r1
1:
ret
2:
smw.adm $sp,[$sp],$sp,#0x6
cfi_adjust_cfa_offset(8)
cfi_rel_offset(gp, 0)
cfi_rel_offset(lp, 4)
mfusr $r15, $PC;
sethi $gp, hi20(_GLOBAL_OFFSET_TABLE_ + 4);
ori $gp, $gp, lo12(_GLOBAL_OFFSET_TABLE_ + 8);
add $gp, $r15, $gp;
sethi $r15, hi20(__tls_get_addr@PLT);
ori $r15, $r15, lo12(__tls_get_addr@PLT);
add $r15, $r15, $gp
jral $r15
lmw.bim $sp,[$sp],$sp,#0x6
cfi_adjust_cfa_offset(-8)
cfi_restore(gp)
cfi_restore(lp)
j 1b
cfi_endproc
.size _dl_tlsdesc_dynamic, .-_dl_tlsdesc_dynamic
#endif
#endif // __UCLIBC_HAS_TLS__
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