Add 'regset' parameter to 'iterate_over_regset_sections_cb'

This adds the 'regset' parameter to the iterator callback.
Consequently the 'regset_from_core_section' method is dropped for all
targets that provide the iterator method.

This change prepares for replacing regset_from_core_section
everywhere, thereby eliminating one gdbarch interface.  Since the
iterator is usually no more complex than regset_from_core_section
alone, targets that previously didn't define core_regset_sections will
then gain multi-arch capable core file generation support without
increased complexity.

gdb/ChangeLog:

	* gdbarch.sh (iterate_over_regset_sections_cb): Add regset
	parameter.
	* gdbarch.h: Regenerate.
	* corelow.c (sniff_core_bfd): Don't sniff if gdbarch has a regset
	iterator.
	(get_core_register_section): Add parameter 'regset' and use it, if
	set.  Add parameter 'min_size' and verify the bfd section size
	against it.
	(get_core_registers_cb): Add parameter 'regset' and pass it to
	get_core_register section.  For the "standard" register sections
	".reg" and ".reg2", set an appropriate default for human_name.
	(get_core_registers): Don't abort when the gdbarch has an iterator
	but no regset_from_core_section.  Add NULL/0 for parameters
	'regset'/'min_size' in calls to get_core_register_section.
	* linux-tdep.c (linux_collect_regset_section_cb): Add parameter
	'regset' and use it instead of calling the
	regset_from_core_section gdbarch method.
	* i386-tdep.h (struct gdbarch_tdep): Add field 'fpregset'.
	* i386-tdep.c (i386_supply_xstateregset)
	(i386_collect_xstateregset, i386_xstateregset): Moved to
	i386-linux-tdep.c.
	(i386_regset_from_core_section): Drop handling for .reg-xfp and
	.reg-xstate.
	(i386_gdbarch_init): Set tdep field 'fpregset'.  Enable generic
	core file support only if the regset iterator hasn't been set.
	* i386-linux-tdep.c (i386_linux_supply_xstateregset)
	(i386_linux_collect_xstateregset, i386_linux_xstateregset): New.
	Moved from i386-tdep.c and renamed to *_linux*.
	(i386_linux_iterate_over_regset_sections): Add regset parameter to
	each callback invocation.  Allow any .reg-xstate size when reading
	from a core file.
	* amd64-tdep.c (amd64_supply_xstateregset)
	(amd64_collect_xstateregset, amd64_xstateregset): Moved to
	amd64-linux-tdep.c.
	(amd64_regset_from_core_section): Remove.
	(amd64_init_abi): Set new tdep field 'fpregset'.  No longer
	install an amd64-specific regset_from_core_section gdbarch method.
	* amd64-linux-tdep.c (amd64_linux_supply_xstateregset)
	(amd64_linux_collect_xstateregset, amd64_linux_xstateregset): New.
	Moved from amd64-tdep.c and renamed to *_linux*.
	(amd64_linux_iterate_over_regset_sections): Add regset parameter
	to each callback invocation.  Allow any .reg-xstate size when
	reading from a core file.
	* arm-linux-tdep.c (arm_linux_regset_from_core_section): Remove.
	(arm_linux_iterate_over_regset_sections): Add regset parameter to
	each callback invocation.
	(arm_linux_init_abi): No longer set the regset_from_core_section
	gdbarch method.
	* ppc-linux-tdep.c (ppc_linux_regset_from_core_section): Remove.
	(ppc_linux_iterate_over_regset_sections): Add regset parameter to
	each callback invocation.
	(ppc_linux_init_abi): No longer set the regset_from_core_section
	gdbarch method.
	* s390-linux-tdep.c (struct gdbarch_tdep): Remove the fields
	gregset, sizeof_gregset, fpregset, and sizeof_fpregset.
	(s390_regset_from_core_section): Remove.
	(s390_iterate_over_regset_sections): Add regset parameter to each
	callback invocation.
	(s390_gdbarch_init): No longer set the regset_from_core_section
	gdbarch method.  Drop initialization of deleted tdep fields.

1 files changed, 2 insertions, 49 deletions

diff --git a/gdb/amd64-tdep.c b/gdb/amd64-tdep.c
index abd9c48..7c8575a 100644
--- a/gdb/amd64-tdep.c
+++ b/gdb/amd64-tdep.c
@@ -2868,53 +2868,10 @@ amd64_collect_fpregset (const struct regset *regset,
   amd64_collect_fxsave (regcache, regnum, fpregs);
 }
 
-/* Similar to amd64_supply_fpregset, but use XSAVE extended state.  */
-
-static void
-amd64_supply_xstateregset (const struct regset *regset,
-			   struct regcache *regcache, int regnum,
-			   const void *xstateregs, size_t len)
-{
-  amd64_supply_xsave (regcache, regnum, xstateregs);
-}
-
-/* Similar to amd64_collect_fpregset, but use XSAVE extended state.  */
-
-static void
-amd64_collect_xstateregset (const struct regset *regset,
-			    const struct regcache *regcache,
-			    int regnum, void *xstateregs, size_t len)
-{
-  amd64_collect_xsave (regcache, regnum, xstateregs, 1);
-}
-
-static const struct regset amd64_fpregset =
+const struct regset amd64_fpregset =
   {
     NULL, amd64_supply_fpregset, amd64_collect_fpregset
   };
-
-static const struct regset amd64_xstateregset =
-  {
-    NULL, amd64_supply_xstateregset, amd64_collect_xstateregset
-  };
-
-/* Return the appropriate register set for the core section identified
-   by SECT_NAME and SECT_SIZE.  */
-
-static const struct regset *
-amd64_regset_from_core_section (struct gdbarch *gdbarch,
-				const char *sect_name, size_t sect_size)
-{
-  struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
-
-  if (strcmp (sect_name, ".reg2") == 0 && sect_size == tdep->sizeof_fpregset)
-    return &amd64_fpregset;
-
-  if (strcmp (sect_name, ".reg-xstate") == 0)
-    return &amd64_xstateregset;
-
-  return i386_regset_from_core_section (gdbarch, sect_name, sect_size);
-}
 
 
 /* Figure out where the longjmp will land.  Slurp the jmp_buf out of
@@ -2973,6 +2930,7 @@ amd64_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   /* AMD64 generally uses `fxsave' instead of `fsave' for saving its
      floating-point registers.  */
   tdep->sizeof_fpregset = I387_SIZEOF_FXSAVE;
+  tdep->fpregset = &amd64_fpregset;
 
   if (! tdesc_has_registers (tdesc))
     tdesc = tdesc_amd64;
@@ -3086,11 +3044,6 @@ amd64_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
   frame_unwind_append_unwinder (gdbarch, &amd64_frame_unwind);
   frame_base_set_default (gdbarch, &amd64_frame_base);
 
-  /* If we have a register mapping, enable the generic core file support.  */
-  if (tdep->gregset_reg_offset)
-    set_gdbarch_regset_from_core_section (gdbarch,
-					  amd64_regset_from_core_section);
-
   set_gdbarch_get_longjmp_target (gdbarch, amd64_get_longjmp_target);
 
   set_gdbarch_relocate_instruction (gdbarch, amd64_relocate_instruction);