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2003-03-15 Roland McGrath <roland@redhat.com>
* thread_db.h (td_err_e): Add TD_NOTLS and TD_TLSDEFER. (td_thr_tlsbase): Declare it. * td_thr_tlsbase.c: New file. * Makefile (libthread_db-routines): Add it. * Versions (libthread_db: GLIBC_2.3.3): New set, add td_thr_tlsbase. * td_thr_tls_get_addr.c (td_thr_tls_get_addr): Use td_thr_tlsbase.
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Roland McGrath
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Mar 15, 2003
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@@ -18,4 +18,7 @@ libthread_db { | |
GLIBC_2.3 { | ||
td_thr_tls_get_addr; | ||
} | ||
GLIBC_2.3.3 { | ||
td_thr_tlsbase; | ||
} | ||
} |
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@@ -0,0 +1,67 @@ | ||
/* Locate TLS data for a thread. | ||
Copyright (C) 2003 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, write to the Free | ||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | ||
02111-1307 USA. */ | ||
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#include "thread_dbP.h" | ||
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/* Value used for dtv entries for which the allocation is delayed. */ | ||
# define TLS_DTV_UNALLOCATED ((void *) -1l) | ||
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td_err_e | ||
td_thr_tlsbase (const td_thrhandle_t *th, | ||
unsigned long int modid, | ||
psaddr_t *base) | ||
{ | ||
if (modid < 1) | ||
return TD_NOTLS; | ||
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#if USE_TLS | ||
union dtv pdtv, *dtvp; | ||
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LOG ("td_thr_tlsbase"); | ||
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psaddr_t dtvpp = th->th_unique; | ||
#if TLS_TCB_AT_TP | ||
dtvpp += offsetof (struct _pthread_descr_struct, p_header.data.dtvp); | ||
#elif TLS_DTV_AT_TP | ||
dtvpp += TLS_PRE_TCB_SIZE + offsetof (tcbhead_t, dtv); | ||
#else | ||
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined." | ||
#endif | ||
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/* 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? */ | ||
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/* 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? */ | ||
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/* It could be that the memory for this module is not allocated for | ||
the given thread. */ | ||
if (pdtv.pointer == TLS_DTV_UNALLOCATED) | ||
return TD_TLSDEFER; | ||
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*base = (char *) pdtv.pointer; | ||
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return TD_OK; | ||
#else | ||
return TD_ERR; | ||
#endif | ||
} |
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Original file line number | Diff line number | Diff line change |
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|
@@ -18,4 +18,7 @@ libthread_db { | |
GLIBC_2.3 { | ||
td_thr_tls_get_addr; | ||
} | ||
GLIBC_2.3.3 { | ||
td_thr_tlsbase; | ||
} | ||
} |
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Original file line number | Diff line number | Diff line change |
---|---|---|
@@ -0,0 +1,67 @@ | ||
/* Locate TLS data for a thread. | ||
Copyright (C) 2003 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, write to the Free | ||
Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA | ||
02111-1307 USA. */ | ||
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#include "thread_dbP.h" | ||
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/* Value used for dtv entries for which the allocation is delayed. */ | ||
# define TLS_DTV_UNALLOCATED ((void *) -1l) | ||
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td_err_e | ||
td_thr_tlsbase (const td_thrhandle_t *th, | ||
unsigned long int modid, | ||
psaddr_t *base) | ||
{ | ||
if (modid < 1) | ||
return TD_NOTLS; | ||
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#if USE_TLS | ||
union dtv pdtv, *dtvp; | ||
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LOG ("td_thr_tlsbase"); | ||
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psaddr_t dtvpp = th->th_unique; | ||
#if TLS_TCB_AT_TP | ||
dtvpp += offsetof (struct pthread, header.dtv); | ||
#elif TLS_DTV_AT_TP | ||
dtvpp += TLS_PRE_TCB_SIZE + offsetof (tcbhead_t, dtv); | ||
#else | ||
# error "Either TLS_TCB_AT_TP or TLS_DTV_AT_TP must be defined." | ||
#endif | ||
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/* 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? */ | ||
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/* 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? */ | ||
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/* It could be that the memory for this module is not allocated for | ||
the given thread. */ | ||
if (pdtv.pointer == TLS_DTV_UNALLOCATED) | ||
return TD_TLSDEFER; | ||
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*base = (char *) pdtv.pointer; | ||
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return TD_OK; | ||
#else | ||
return TD_ERR; | ||
#endif | ||
} |
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