diff options
Diffstat (limited to 'ports/sysdeps/tile/__tls_get_addr.S')
| -rw-r--r-- | ports/sysdeps/tile/__tls_get_addr.S | 150 |
1 files changed, 150 insertions, 0 deletions
diff --git a/ports/sysdeps/tile/__tls_get_addr.S b/ports/sysdeps/tile/__tls_get_addr.S new file mode 100644 index 0000000000..74e4fa2c26 --- /dev/null +++ b/ports/sysdeps/tile/__tls_get_addr.S @@ -0,0 +1,150 @@ +/* Copyright (C) 2011-2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. + + 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> +#include <tls.h> +#include <bits/wordsize.h> + +#if __WORDSIZE == 64 +#define LOG_SIZEOF_DTV_T 4 +#else +#define LOG_SIZEOF_DTV_T 3 +#endif + +/* On entry, r0 points to two words, the module and the offset. + On return, r0 holds the pointer to the relevant TLS memory. + Only registers r25..r29 are clobbered by the call. */ + + .text +ENTRY (__tls_get_addr) + { + lnk r25 + ADDI_PTR r27, tp, DTV_OFFSET + } +.Llnk: +#ifdef __tilegx__ + { + LD_PTR r27, r27 /* r27 = THREAD_DTV() */ + moveli r26, hw1_last(_rtld_local + TLS_GENERATION_OFFSET - .Llnk) + } + shl16insli r26, r26, hw0(_rtld_local + TLS_GENERATION_OFFSET - .Llnk) + { + ADD_PTR r25, r25, r26 + LD_PTR r26, r0 /* r26 = ti_module */ + } +#else + { + LD_PTR r27, r27 /* r27 = THREAD_DTV() */ + addli r25, r25, lo16(_rtld_local + TLS_GENERATION_OFFSET - .Llnk) + } + { + auli r25, r25, ha16(_rtld_local + TLS_GENERATION_OFFSET - .Llnk) + LD_PTR r26, r0 /* r26 = ti_module */ + } +#endif + LD_PTR r25, r25 /* r25 = DL(dl_tls_generation) */ + { + LD_PTR r28, r27 /* r28 = THREAD_DTV()->counter */ + ADDI_PTR r29, r0, __SIZEOF_POINTER__ + } + { + LD_PTR r29, r29 /* r29 = ti_offset */ + CMPEQ r25, r28, r25 /* r25 nonzero if generation OK */ + shli r28, r26, LOG_SIZEOF_DTV_T /* byte index into dtv array */ + } + { + BEQZ r25, .Lslowpath + CMPEQI r25, r26, -1 /* r25 nonzero if ti_module invalid */ + } + { + BNEZ r25, .Lslowpath + ADD_PTR r28, r28, r27 /* pointer into module array */ + } + LD_PTR r26, r28 /* r26 = module TLS pointer */ + { + ADD_PTR r0, r26, r29 + jrp lr + } + +.Lslowpath: + { + ST sp, lr + ADDLI_PTR r29, sp, - (25 * REGSIZE) + } + cfi_offset (lr, 0) + { + ST r29, sp + ADDLI_PTR sp, sp, - (26 * REGSIZE) + } + cfi_def_cfa_offset (26 * REGSIZE) + ADDI_PTR r29, sp, (2 * REGSIZE) + { ST r29, r1; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r2; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r3; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r4; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r5; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r6; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r7; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r8; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r9; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r10; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r11; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r12; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r13; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r14; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r15; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r16; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r17; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r18; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r19; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r20; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r21; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r22; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r23; ADDI_PTR r29, r29, REGSIZE } + { ST r29, r24; ADDI_PTR r29, r29, REGSIZE } + .hidden __tls_get_addr_slow + jal __tls_get_addr_slow + ADDI_PTR r29, sp, (2 * REGSIZE) + { LD r1, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r2, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r3, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r4, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r5, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r6, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r7, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r8, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r9, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r10, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r11, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r12, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r13, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r14, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r15, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r16, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r17, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r18, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r19, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r20, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r21, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r22, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r23, r29; ADDI_PTR r29, r29, REGSIZE } + { LD r24, r29; ADDLI_PTR sp, sp, (26 * REGSIZE) } + cfi_def_cfa_offset (0) + LD lr, sp + jrp lr +END (__tls_get_addr) |