From e1e46622ac0fce73d802fa4a8a2e83cc25cd9e7a Mon Sep 17 00:00:00 2001 From: Waldemar Brodkorb Date: Sat, 14 Feb 2015 23:04:02 -0600 Subject: Revert "resolve merge" This reverts commit 6b6ede3d15f04fe825cfa9f697507457e3640344. --- libpthread/linuxthreads_db/td_thr_tlsbase.c | 70 +++++++++++++++++++++++++++++ 1 file changed, 70 insertions(+) create mode 100644 libpthread/linuxthreads_db/td_thr_tlsbase.c (limited to 'libpthread/linuxthreads_db/td_thr_tlsbase.c') diff --git a/libpthread/linuxthreads_db/td_thr_tlsbase.c b/libpthread/linuxthreads_db/td_thr_tlsbase.c new file mode 100644 index 000000000..ac86c42fe --- /dev/null +++ b/libpthread/linuxthreads_db/td_thr_tlsbase.c @@ -0,0 +1,70 @@ +/* Locate TLS data for a thread. + Copyright (C) 2003, 2004, 2005 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + 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 + . */ + +#include "thread_dbP.h" + +/* Value used for dtv entries for which the allocation is delayed. */ +# define TLS_DTV_UNALLOCATED ((void *) -1l) + +td_err_e +td_thr_tlsbase (const td_thrhandle_t *th, + unsigned long int modid, + psaddr_t *base) +{ + if (modid < 1) + return TD_NOTLS; + +#ifdef __UCLIBC_HAS_TLS__ + union dtv pdtv, *dtvp; + + LOG ("td_thr_tlsbase"); + + psaddr_t dtvpp = th->th_unique; +#if defined(TLS_TCB_AT_TP) + dtvpp += offsetof (struct _pthread_descr_struct, p_header.data.dtvp); +#elif defined(TLS_DTV_AT_TP) +/* Special case hack. If TLS_TCB_SIZE == 0 (on PowerPC), there is no TCB + containing the DTV at the TP, but actually the TCB lies behind the TP, + i.e. at the very end of the area covered by TLS_PRE_TCB_SIZE. */ + dtvpp += TLS_PRE_TCB_SIZE + offsetof (tcbhead_t, dtv) + - (TLS_TCB_SIZE == 0 ? sizeof (tcbhead_t) : 0); +#else +# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined." +#endif + + /* Get the DTV pointer from the thread descriptor. */ + if (ps_pdread (th->th_ta_p->ph, dtvpp, &dtvp, sizeof dtvp) != PS_OK) + return TD_ERR; /* XXX Other error value? */ + + /* Get the corresponding entry in the DTV. */ + if (ps_pdread (th->th_ta_p->ph, dtvp + modid, + &pdtv, sizeof (union dtv)) != PS_OK) + return TD_ERR; /* XXX Other error value? */ + + /* It could be that the memory for this module is not allocated for + the given thread. */ + if (pdtv.pointer.val == TLS_DTV_UNALLOCATED) + return TD_TLSDEFER; + + *base = (char *) pdtv.pointer.val; + + return TD_OK; +#else + return TD_ERR; +#endif +} -- cgit v1.2.3