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Re: [rfc] Remove macro DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRES
- From: "Ulrich Weigand" <uweigand at de dot ibm dot com>
- To: deuling at de dot ibm dot com (Markus Deuling)
- Cc: mark dot kettenis at xs4all dot nl (Mark Kettenis), gdb-patches at sourceware dot org
- Date: Mon, 18 Jun 2007 20:01:26 +0200 (CEST)
- Subject: Re: [rfc] Remove macro DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRES
Markus Deuling wrote:
> * gdbarch.sh (DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS): Remove.
> * sh-tdep.c (sh_extract_struct_value_address): Remove.
> (sh_gdbarch_init): Remove
> set_gdbarch_deprecated_extract_struct_value_address.
> * sh64-tdep.c (sh64_extract_struct_value_address): Remove.
> (sh64_gdbarch_init): Remove
> set_gdbarch_deprecated_extract_struct_value_address.
> * ia64-tdep.c (ia64_extract_struct_value_address): Remove.
> (ia64_gdbarch_init): Remove
> set_gdbarch_deprecated_extract_struct_value_address.
> * frv-tdep.c (frv_extract_struct_value_address): Remove.
> (frv_gdbarch_init): Remove
> set_gdbarch_deprecated_extract_struct_value_address.
> * gdbarch.c, gdbarch.h: Regenerate.
I've committed this; I've also removed the comment in gdbarch.sh
leading up to the removed function. Note that even the 'replacment'
mentioned in that comment, extract_returned_value_address, is itself
already obsolete -- the correct way to indicate the returned struct
address is by using the RETURN_VALUE_ABI_RETURNS_ADDRESS or
RETURN_VALUE_ABI_PRESERVES_ADDRESS return value convention.
See below the version of the patch as I committed it.
Bye,
Ulrich
diff -urNp gdb-orig/gdb/frv-tdep.c gdb-head/gdb/frv-tdep.c
--- gdb-orig/gdb/frv-tdep.c 2007-06-18 19:51:09.625815000 +0200
+++ gdb-head/gdb/frv-tdep.c 2007-06-18 19:52:40.183483303 +0200
@@ -1049,14 +1049,6 @@ frv_extract_return_value (struct type *t
}
static CORE_ADDR
-frv_extract_struct_value_address (struct regcache *regcache)
-{
- ULONGEST addr;
- regcache_cooked_read_unsigned (regcache, struct_return_regnum, &addr);
- return addr;
-}
-
-static CORE_ADDR
frv_frame_align (struct gdbarch *gdbarch, CORE_ADDR sp)
{
/* Require dword alignment. */
@@ -1502,7 +1494,6 @@ frv_gdbarch_init (struct gdbarch_info in
set_gdbarch_extract_return_value (gdbarch, frv_extract_return_value);
set_gdbarch_store_return_value (gdbarch, frv_store_return_value);
- set_gdbarch_deprecated_extract_struct_value_address (gdbarch, frv_extract_struct_value_address);
/* Frame stuff. */
set_gdbarch_unwind_pc (gdbarch, frv_unwind_pc);
diff -urNp gdb-orig/gdb/gdbarch.c gdb-head/gdb/gdbarch.c
--- gdb-orig/gdb/gdbarch.c 2007-06-18 19:51:09.650811000 +0200
+++ gdb-head/gdb/gdbarch.c 2007-06-18 19:52:40.245474387 +0200
@@ -188,7 +188,6 @@ struct gdbarch
gdbarch_extract_return_value_ftype *extract_return_value;
gdbarch_store_return_value_ftype *store_return_value;
gdbarch_deprecated_use_struct_convention_ftype *deprecated_use_struct_convention;
- gdbarch_deprecated_extract_struct_value_address_ftype *deprecated_extract_struct_value_address;
gdbarch_skip_prologue_ftype *skip_prologue;
gdbarch_inner_than_ftype *inner_than;
gdbarch_breakpoint_from_pc_ftype *breakpoint_from_pc;
@@ -311,7 +310,6 @@ struct gdbarch startup_gdbarch =
0, /* extract_return_value */
0, /* store_return_value */
0, /* deprecated_use_struct_convention */
- 0, /* deprecated_extract_struct_value_address */
0, /* skip_prologue */
0, /* inner_than */
0, /* breakpoint_from_pc */
@@ -555,7 +553,6 @@ verify_gdbarch (struct gdbarch *current_
/* Skip verify of integer_to_address, has predicate */
/* Skip verify of return_value, has predicate */
/* Skip verify of deprecated_use_struct_convention, invalid_p == 0 */
- /* Skip verify of deprecated_extract_struct_value_address, has predicate */
if (current_gdbarch->skip_prologue == 0)
fprintf_unfiltered (log, "\n\tskip_prologue");
if (current_gdbarch->inner_than == 0)
@@ -725,24 +722,6 @@ gdbarch_dump (struct gdbarch *current_gd
fprintf_unfiltered (file,
"gdbarch_dump: decr_pc_after_break = 0x%s\n",
paddr_nz (current_gdbarch->decr_pc_after_break));
-#ifdef DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS_P
- fprintf_unfiltered (file,
- "gdbarch_dump: %s # %s\n",
- "DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS_P()",
- XSTRING (DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS_P ()));
-#endif
- fprintf_unfiltered (file,
- "gdbarch_dump: gdbarch_deprecated_extract_struct_value_address_p() = %d\n",
- gdbarch_deprecated_extract_struct_value_address_p (current_gdbarch));
-#ifdef DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS
- fprintf_unfiltered (file,
- "gdbarch_dump: %s # %s\n",
- "DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS(regcache)",
- XSTRING (DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS (regcache)));
-#endif
- fprintf_unfiltered (file,
- "gdbarch_dump: deprecated_extract_struct_value_address = <0x%lx>\n",
- (long) current_gdbarch->deprecated_extract_struct_value_address);
#ifdef DEPRECATED_FP_REGNUM
fprintf_unfiltered (file,
"gdbarch_dump: DEPRECATED_FP_REGNUM # %s\n",
@@ -2221,30 +2200,6 @@ set_gdbarch_deprecated_use_struct_conven
gdbarch->deprecated_use_struct_convention = deprecated_use_struct_convention;
}
-int
-gdbarch_deprecated_extract_struct_value_address_p (struct gdbarch *gdbarch)
-{
- gdb_assert (gdbarch != NULL);
- return gdbarch->deprecated_extract_struct_value_address != NULL;
-}
-
-CORE_ADDR
-gdbarch_deprecated_extract_struct_value_address (struct gdbarch *gdbarch, struct regcache *regcache)
-{
- gdb_assert (gdbarch != NULL);
- gdb_assert (gdbarch->deprecated_extract_struct_value_address != NULL);
- if (gdbarch_debug >= 2)
- fprintf_unfiltered (gdb_stdlog, "gdbarch_deprecated_extract_struct_value_address called\n");
- return gdbarch->deprecated_extract_struct_value_address (regcache);
-}
-
-void
-set_gdbarch_deprecated_extract_struct_value_address (struct gdbarch *gdbarch,
- gdbarch_deprecated_extract_struct_value_address_ftype deprecated_extract_struct_value_address)
-{
- gdbarch->deprecated_extract_struct_value_address = deprecated_extract_struct_value_address;
-}
-
CORE_ADDR
gdbarch_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR ip)
{
diff -urNp gdb-orig/gdb/gdbarch.h gdb-head/gdb/gdbarch.h
--- gdb-orig/gdb/gdbarch.h 2007-06-18 19:51:09.671808000 +0200
+++ gdb-head/gdb/gdbarch.h 2007-06-18 19:52:40.301466333 +0200
@@ -427,49 +427,6 @@ extern void set_gdbarch_deprecated_use_s
#define DEPRECATED_USE_STRUCT_CONVENTION(gcc_p, value_type) (gdbarch_deprecated_use_struct_convention (current_gdbarch, gcc_p, value_type))
#endif
-/* As of 2004-01-17 only the 32-bit SPARC ABI has been identified as an
- ABI suitable for the implementation of a robust extract
- struct-convention return-value address method (the sparc saves the
- address in the callers frame). All the other cases so far examined,
- the DEPRECATED_EXTRACT_STRUCT_VALUE implementation has been
- erreneous - the code was incorrectly assuming that the return-value
- address, stored in a register, was preserved across the entire
- function call.
- For the moment retain DEPRECATED_EXTRACT_STRUCT_VALUE as a marker of
- the ABIs that are still to be analyzed - perhaps this should simply
- be deleted. The commented out extract_returned_value_address method
- is provided as a starting point for the 32-bit SPARC. It, or
- something like it, along with changes to both infcmd.c and stack.c
- will be needed for that case to work. NB: It is passed the callers
- frame since it is only after the callee has returned that this
- function is used.
- M::CORE_ADDR:extract_returned_value_address:struct frame_info *caller_frame:caller_frame */
-
-#if defined (DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS)
-/* Legacy for systems yet to multi-arch DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS */
-#if !defined (DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS_P)
-#define DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS_P() (1)
-#endif
-#endif
-
-extern int gdbarch_deprecated_extract_struct_value_address_p (struct gdbarch *gdbarch);
-#if !defined (GDB_TM_FILE) && defined (DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS_P)
-#error "Non multi-arch definition of DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS"
-#endif
-#if !defined (DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS_P)
-#define DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS_P() (gdbarch_deprecated_extract_struct_value_address_p (current_gdbarch))
-#endif
-
-typedef CORE_ADDR (gdbarch_deprecated_extract_struct_value_address_ftype) (struct regcache *regcache);
-extern CORE_ADDR gdbarch_deprecated_extract_struct_value_address (struct gdbarch *gdbarch, struct regcache *regcache);
-extern void set_gdbarch_deprecated_extract_struct_value_address (struct gdbarch *gdbarch, gdbarch_deprecated_extract_struct_value_address_ftype *deprecated_extract_struct_value_address);
-#if !defined (GDB_TM_FILE) && defined (DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS)
-#error "Non multi-arch definition of DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS"
-#endif
-#if !defined (DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS)
-#define DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS(regcache) (gdbarch_deprecated_extract_struct_value_address (current_gdbarch, regcache))
-#endif
-
typedef CORE_ADDR (gdbarch_skip_prologue_ftype) (CORE_ADDR ip);
extern CORE_ADDR gdbarch_skip_prologue (struct gdbarch *gdbarch, CORE_ADDR ip);
extern void set_gdbarch_skip_prologue (struct gdbarch *gdbarch, gdbarch_skip_prologue_ftype *skip_prologue);
diff -urNp gdb-orig/gdb/gdbarch.sh gdb-head/gdb/gdbarch.sh
--- gdb-orig/gdb/gdbarch.sh 2007-06-18 19:51:09.692805000 +0200
+++ gdb-head/gdb/gdbarch.sh 2007-06-18 19:52:40.357458279 +0200
@@ -517,28 +517,6 @@ f:=:void:extract_return_value:struct typ
f:=:void:store_return_value:struct type *type, struct regcache *regcache, const gdb_byte *valbuf:type, regcache, valbuf:0
f:=:int:deprecated_use_struct_convention:int gcc_p, struct type *value_type:gcc_p, value_type::generic_use_struct_convention::0
-# As of 2004-01-17 only the 32-bit SPARC ABI has been identified as an
-# ABI suitable for the implementation of a robust extract
-# struct-convention return-value address method (the sparc saves the
-# address in the callers frame). All the other cases so far examined,
-# the DEPRECATED_EXTRACT_STRUCT_VALUE implementation has been
-# erreneous - the code was incorrectly assuming that the return-value
-# address, stored in a register, was preserved across the entire
-# function call.
-
-# For the moment retain DEPRECATED_EXTRACT_STRUCT_VALUE as a marker of
-# the ABIs that are still to be analyzed - perhaps this should simply
-# be deleted. The commented out extract_returned_value_address method
-# is provided as a starting point for the 32-bit SPARC. It, or
-# something like it, along with changes to both infcmd.c and stack.c
-# will be needed for that case to work. NB: It is passed the callers
-# frame since it is only after the callee has returned that this
-# function is used.
-
-#M::CORE_ADDR:extract_returned_value_address:struct frame_info *caller_frame:caller_frame
-F:=:CORE_ADDR:deprecated_extract_struct_value_address:struct regcache *regcache:regcache
-
-#
f::CORE_ADDR:skip_prologue:CORE_ADDR ip:ip:0:0
f::int:inner_than:CORE_ADDR lhs, CORE_ADDR rhs:lhs, rhs:0:0
f::const gdb_byte *:breakpoint_from_pc:CORE_ADDR *pcptr, int *lenptr:pcptr, lenptr::0:
diff -urNp gdb-orig/gdb/ia64-tdep.c gdb-head/gdb/ia64-tdep.c
--- gdb-orig/gdb/ia64-tdep.c 2007-06-18 19:51:09.705803000 +0200
+++ gdb-head/gdb/ia64-tdep.c 2007-06-18 19:52:40.404451520 +0200
@@ -2994,13 +2994,6 @@ ia64_extract_return_value (struct type *
}
}
-CORE_ADDR
-ia64_extract_struct_value_address (struct regcache *regcache)
-{
- error (_("ia64_extract_struct_value_address called and cannot get struct value address"));
- return 0;
-}
-
static int
is_float_or_hfa_type_recurse (struct type *t, struct type **etp)
@@ -3551,7 +3544,6 @@ ia64_gdbarch_init (struct gdbarch_info i
set_gdbarch_extract_return_value (gdbarch, ia64_extract_return_value);
set_gdbarch_store_return_value (gdbarch, ia64_store_return_value);
- set_gdbarch_deprecated_extract_struct_value_address (gdbarch, ia64_extract_struct_value_address);
set_gdbarch_memory_insert_breakpoint (gdbarch, ia64_memory_insert_breakpoint);
set_gdbarch_memory_remove_breakpoint (gdbarch, ia64_memory_remove_breakpoint);
diff -urNp gdb-orig/gdb/sh64-tdep.c gdb-head/gdb/sh64-tdep.c
--- gdb-orig/gdb/sh64-tdep.c 2007-06-18 19:51:09.728800000 +0200
+++ gdb-head/gdb/sh64-tdep.c 2007-06-18 19:52:40.462443179 +0200
@@ -962,17 +962,6 @@ sh64_analyze_prologue (struct gdbarch *g
}
static CORE_ADDR
-sh64_extract_struct_value_address (struct regcache *regcache)
-{
- /* FIXME: cagney/2004-01-17: Does the ABI guarantee that the return
- address regster is preserved across function calls? Probably
- not, making this function wrong. */
- ULONGEST val;
- regcache_raw_read_unsigned (regcache, STRUCT_RETURN_REGNUM, &val);
- return val;
-}
-
-static CORE_ADDR
sh64_frame_align (struct gdbarch *ignore, CORE_ADDR sp)
{
return sp & ~7;
@@ -2515,8 +2504,6 @@ sh64_gdbarch_init (struct gdbarch_info i
set_gdbarch_register_sim_regno (gdbarch, legacy_register_sim_regno);
set_gdbarch_return_value (gdbarch, sh64_return_value);
- set_gdbarch_deprecated_extract_struct_value_address (gdbarch,
- sh64_extract_struct_value_address);
set_gdbarch_skip_prologue (gdbarch, sh64_skip_prologue);
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
diff -urNp gdb-orig/gdb/sh-tdep.c gdb-head/gdb/sh-tdep.c
--- gdb-orig/gdb/sh-tdep.c 2007-06-18 19:51:09.751797000 +0200
+++ gdb-head/gdb/sh-tdep.c 2007-06-18 19:52:40.518435125 +0200
@@ -815,18 +815,6 @@ sh_use_struct_convention (int gcc_p, str
return 1;
}
-/* Extract from an array REGBUF containing the (raw) register state
- the address in which a function should return its structure value,
- as a CORE_ADDR (or an expression that can be used as one). */
-static CORE_ADDR
-sh_extract_struct_value_address (struct regcache *regcache)
-{
- ULONGEST addr;
-
- regcache_cooked_read_unsigned (regcache, STRUCT_RETURN_REGNUM, &addr);
- return addr;
-}
-
static CORE_ADDR
sh_frame_align (struct gdbarch *ignore, CORE_ADDR sp)
{
@@ -2751,8 +2739,6 @@ sh_gdbarch_init (struct gdbarch_info inf
set_gdbarch_register_sim_regno (gdbarch, legacy_register_sim_regno);
set_gdbarch_return_value (gdbarch, sh_return_value_nofpu);
- set_gdbarch_deprecated_extract_struct_value_address (gdbarch,
- sh_extract_struct_value_address);
set_gdbarch_skip_prologue (gdbarch, sh_skip_prologue);
set_gdbarch_inner_than (gdbarch, core_addr_lessthan);
--
Dr. Ulrich Weigand
GNU Toolchain for Linux on System z and Cell BE
Ulrich.Weigand@de.ibm.com