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[PowerPC] Reject tdescs with VSX and no FPU or Altivec 

Currently rs6000_gdbarch_init will accept a tdesc with the
"org.gnu.gdb.power.vsx" feature but without the
"org.gnu.gdb.power.altivec" or "org.gnu.gdb.power.fpu".

It isn't clear from the standard features documentation that these are
requirements.  However, these tdescs would cause trouble in the VSX
pseudo-register functions, so this patch will cause them to be
rejected.

gdb/ChangeLog:
2018-10-26  Pedro Franco de Carvalho  <pedromfc@linux.ibm.com>

	* rs6000-tdep.c (rs6000_gdbarch_init): Reject tdescs with vsx but
	without altivec or fpu.
This commit is contained in:
Pedro Franco de Carvalho 2018-10-26 09:37:55 -03:00
parent 232bfb8644
commit 81ab84fd6c
2 changed files with 7 additions and 1 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2018-10-26 Pedro Franco de Carvalho <pedromfc@linux.ibm.com>
* rs6000-tdep.c (rs6000_gdbarch_init): Reject tdescs with vsx but
without altivec or fpu.
2018-10-26 Edjunior Barbosa Machado <emachado@linux.vnet.ibm.com>
Pedro Franco de Carvalho <pedromfc@linux.ibm.com>

3
gdb/rs6000-tdep.c
View File

@ -6042,7 +6042,8 @@ rs6000_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
valid_p &= tdesc_numbered_register (feature, tdesc_data,
PPC_VSR0_UPPER_REGNUM + i,
vsx_regs[i]);
if (!valid_p)
if (!valid_p || !have_fpu || !have_altivec)
{
tdesc_data_cleanup (tdesc_data);
return NULL;