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gdb: xtensa: fix test for privileged register number 

There are no a0-a15 pseudoregisters at the top of the register set in
call0 registers layout. All registers above gdbarch_num_regs (gdbarch)
are privileged. Treat them as such. This fixes the following gdb
assertion seen when 'finish' command is invoked:

  regcache.c:649: internal-error: register_status
  regcache_raw_read(regcache*, int, gdb_byte*):
  Assertion `regnum >= 0 && regnum < regcache->descr->nr_raw_registers'
  failed.

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

	* xtensa-tdep.c (xtensa_pseudo_register_read): Treat all
	registers above gdbarch_num_regs (gdbarch) as privileged in
	call0 ABI.
This commit is contained in:
Max Filippov 2017-02-21 15:41:31 -08:00
parent 1a09b50a46
commit 0d0bf81a67
2 changed files with 8 additions and 1 deletions
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6
gdb/ChangeLog
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@ -1,3 +1,9 @@
2017-03-27 Max Filippov <jcmvbkbc@gmail.com>
* xtensa-tdep.c (xtensa_pseudo_register_read): Treat all
registers above gdbarch_num_regs (gdbarch) as privileged in
call0 ABI.
2017-03-27 Max Filippov <jcmvbkbc@gmail.com>
* xtensa-linux-nat.c (fill_gregset): Call regcache_raw_collect

3
gdb/xtensa-tdep.c
View File

@ -578,7 +578,8 @@ xtensa_pseudo_register_read (struct gdbarch *gdbarch,
/* We have to find out how to deal with priveleged registers.
Let's treat them as pseudo-registers, but we cannot read/write them. */
else if (regnum < gdbarch_tdep (gdbarch)->a0_base)
else if (gdbarch_tdep (gdbarch)->call_abi == CallAbiCall0Only
|| regnum < gdbarch_tdep (gdbarch)->a0_base)
{
buffer[0] = (gdb_byte)0;
buffer[1] = (gdb_byte)0;