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gdb: xtensa-linux: support THREADPTR register 

Make THREADPTR user register accessible.

gdb/
2017-03-27  Max Filippov  <jcmvbkbc@gmail.com>

	* xtensa-linux-nat.c (fill_gregset): Call regcache_raw_collect
	for THREADPTR register.
	(supply_gregset_reg): Call regcache_raw_supply for THREADPTR
	register.
	* xtensa-tdep.c (XTENSA_DBREGN_UREG): New definition.
	(xtensa_derive_tdep): Initialize tdep->threadptr_regnum.
	* xtensa-tdep.h (gdbarch_tdep::threadptr_regnum): New field.
This commit is contained in:
Max Filippov 2016-11-18 11:39:47 -08:00
parent 0d0bf81a67
commit f74f865e50
4 changed files with 23 additions and 0 deletions
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10
gdb/ChangeLog
View File

@ -1,3 +1,13 @@
2017-03-27 Max Filippov <jcmvbkbc@gmail.com>
* xtensa-linux-nat.c (fill_gregset): Call regcache_raw_collect
for THREADPTR register.
(supply_gregset_reg): Call regcache_raw_supply for THREADPTR
register.
* xtensa-tdep.c (XTENSA_DBREGN_UREG): New definition.
(xtensa_derive_tdep): Initialize tdep->threadptr_regnum.
* xtensa-tdep.h (gdbarch_tdep::threadptr_regnum): New field.
2017-03-27 Max Filippov <jcmvbkbc@gmail.com>
* xtensa-tdep.c (xtensa_pseudo_register_read): Treat all

8
gdb/xtensa-linux-nat.c
View File

@ -82,6 +82,10 @@ fill_gregset (const struct regcache *regcache,
regcache_raw_collect (regcache,
gdbarch_tdep (gdbarch)->sar_regnum,
&regs->sar);
if (regnum == gdbarch_tdep (gdbarch)->threadptr_regnum || regnum == -1)
regcache_raw_collect (regcache,
gdbarch_tdep (gdbarch)->threadptr_regnum,
&regs->threadptr);
if (regnum >=gdbarch_tdep (gdbarch)->ar_base
&& regnum < gdbarch_tdep (gdbarch)->ar_base
+ gdbarch_tdep (gdbarch)->num_aregs)
@ -148,6 +152,10 @@ supply_gregset_reg (struct regcache *regcache,
regcache_raw_supply (regcache,
gdbarch_tdep (gdbarch)->sar_regnum,
&regs->sar);
if (regnum == gdbarch_tdep (gdbarch)->threadptr_regnum || regnum == -1)
regcache_raw_supply (regcache,
gdbarch_tdep (gdbarch)->threadptr_regnum,
&regs->threadptr);
if (regnum >=gdbarch_tdep (gdbarch)->ar_base
&& regnum < gdbarch_tdep (gdbarch)->ar_base
+ gdbarch_tdep (gdbarch)->num_aregs)

4
gdb/xtensa-tdep.c
View File

@ -3107,6 +3107,8 @@ xtensa_derive_tdep (struct gdbarch_tdep *tdep)
/* Special registers 0..255 (core). */
#define XTENSA_DBREGN_SREG(n) (0x0200+(n))
/* User registers 0..255. */
#define XTENSA_DBREGN_UREG(n) (0x0300+(n))
for (rmap = tdep->regmap, n = 0; rmap->target_number != -1; n++, rmap++)
{
@ -3138,6 +3140,8 @@ xtensa_derive_tdep (struct gdbarch_tdep *tdep)
tdep->litbase_regnum = n;
else if (rmap->target_number == XTENSA_DBREGN_SREG(230))
tdep->ps_regnum = n;
else if (rmap->target_number == XTENSA_DBREGN_UREG(231))
tdep->threadptr_regnum = n;
#if 0
else if (rmap->target_number == XTENSA_DBREGN_SREG(226))
tdep->interrupt_regnum = n;

1
gdb/xtensa-tdep.h
View File

@ -204,6 +204,7 @@ struct gdbarch_tdep
int lcount_regnum;
int sar_regnum; /* Register number of SAR. */
int litbase_regnum; /* Register number of LITBASE. */
int threadptr_regnum; /* Register number of THREADPTR. */
int interrupt_regnum; /* Register number for interrupt. */
int interrupt2_regnum; /* Register number for interrupt2. */