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RISC-V: Don't use ps_get_thread_area in libthread_db (bug 23402)

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Since RISC-V stores the thread pointer in a general register libthread_db
can just ask the debugger for the register contents instead of trying to
call ps_get_thread_area.  This enables thread debugging in gdb.

	* sysdeps/riscv/nptl/tls.h (DB_THREAD_SELF): Use REGISTER instead
	of CONST_THREAD_AREA.
This commit is contained in:
Andreas Schwab 2018-07-12 09:24:36 +02:00 committed by Palmer Dabbelt
parent fb4c32aef6
commit 92a4cba760
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2 changed files with 8 additions and 2 deletions
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ChangeLog
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@ -1,3 +1,8 @@
2018-08-06 Andreas Schwab <schwab@suse.de>
* sysdeps/riscv/nptl/tls.h (DB_THREAD_SELF): Use REGISTER instead
of CONST_THREAD_AREA.
2018-08-06 H.J. Lu <hongjiu.lu@intel.com>
* sysdeps/x86/cpu-features.h (STATE_SAVE_OFFSET): Removed.

5
sysdeps/riscv/nptl/tls.h
View File

@ -99,9 +99,10 @@ typedef struct
# define TLS_DEFINE_INIT_TP(tp, pd) \
void *tp = (void *) (pd) + TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE
/* Magic for libthread_db to know how to do THREAD_SELF. */
/* Informs libthread_db that the thread pointer is register 4, which is used
* to know how to do THREAD_SELF. */
# define DB_THREAD_SELF \
CONST_THREAD_AREA (32, TLS_TCB_OFFSET + TLS_PRE_TCB_SIZE)
REGISTER (64, 64, 4 * 8, - TLS_TCB_OFFSET - TLS_PRE_TCB_SIZE)
/* Access to data in the thread descriptor is easy. */
# define THREAD_GETMEM(descr, member) \