diff options
| -rw-r--r-- | gdb/ChangeLog | 19 | ||||
| -rw-r--r-- | gdb/Makefile.in | 2 | ||||
| -rw-r--r-- | gdb/arch-utils.c | 41 | ||||
| -rw-r--r-- | gdb/arch-utils.h | 13 | ||||
| -rw-r--r-- | gdb/gdbarch.c | 4 | ||||
| -rw-r--r-- | gdb/gdbarch.h | 5 | ||||
| -rwxr-xr-x | gdb/gdbarch.sh | 6 | ||||
| -rw-r--r-- | gdb/infcall.c | 11 | ||||
| -rw-r--r-- | gdb/infcmd.c | 40 | ||||
| -rw-r--r-- | gdb/stack.c | 24 | ||||
| -rw-r--r-- | gdb/values.c | 14 |
11 files changed, 99 insertions, 80 deletions
diff --git a/gdb/ChangeLog b/gdb/ChangeLog index bf5798e..d80de75 100644 --- a/gdb/ChangeLog +++ b/gdb/ChangeLog @@ -1,5 +1,24 @@ 2004-06-20 Andrew Cagney <cagney@gnu.org> + * gdbarch.sh (RETURN_VALUE): Default to legacy_return_value. + * gdbarch.h, gdbarch.c: Re-generate. + * Makefile.in (arch-utils.o): Update dependencies. + * values.c (using_struct_return): Move code calling + USE_STRUCT_CONVENTION to legacy_return_value, simplify. + * stack.c (return_command): Move code calling STORE_RETURN_VALUE + to legacy_return_value, simplify. + * infcmd.c (print_return_value): Move code calling + DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS and EXTRACT_RETURN_VALUE + to legacy_return_value, simplify. + * infcall.c (call_function_by_hand): Move code calling + EXTRACT_RETURN_VALUE to legacy_return_value, simplify. + * arch-utils.c: Update copyright. Include "gdbcore.h". + (legacy_return_value): New function. + * arch-utils.h: Update copyright. + (legacy_return_value): Declare. + +2004-06-20 Andrew Cagney <cagney@gnu.org> + * gdbarch.sh (DEPRECATED_USE_STRUCT_CONVENTION): Deprecated. * gdbarch.h, gdbarch.c: Re-generate. * values.c (using_struct_return): Update call. diff --git a/gdb/Makefile.in b/gdb/Makefile.in index b113c9a..9eb471f 100644 --- a/gdb/Makefile.in +++ b/gdb/Makefile.in @@ -1598,7 +1598,7 @@ annotate.o: annotate.c $(defs_h) $(annotate_h) $(value_h) $(target_h) \ arch-utils.o: arch-utils.c $(defs_h) $(arch_utils_h) $(buildsym_h) \ $(gdbcmd_h) $(inferior_h) $(gdb_string_h) $(regcache_h) \ $(gdb_assert_h) $(sim_regno_h) $(osabi_h) $(version_h) \ - $(floatformat_h) + $(floatformat_h) $(gdbcore_h) arm-linux-nat.o: arm-linux-nat.c $(defs_h) $(inferior_h) $(gdbcore_h) \ $(gdb_string_h) $(regcache_h) $(arm_tdep_h) $(gregset_h) arm-linux-tdep.o: arm-linux-tdep.c $(defs_h) $(target_h) $(value_h) \ diff --git a/gdb/arch-utils.c b/gdb/arch-utils.c index 2ec0674..d7bbe6c 100644 --- a/gdb/arch-utils.c +++ b/gdb/arch-utils.c @@ -1,7 +1,7 @@ /* Dynamic architecture support for GDB, the GNU debugger. - Copyright 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, - Inc. + Copyright 1998, 1999, 2000, 2001, 2002, 2003, 2004 Free Software + Foundation, Inc. This file is part of GDB. @@ -30,7 +30,7 @@ #include "regcache.h" #include "gdb_assert.h" #include "sim-regno.h" - +#include "gdbcore.h" #include "osabi.h" #include "version.h" @@ -60,13 +60,46 @@ legacy_store_return_value (struct type *type, struct regcache *regcache, DEPRECATED_STORE_RETURN_VALUE (type, b); } - int always_use_struct_convention (int gcc_p, struct type *value_type) { return 1; } +enum return_value_convention +legacy_return_value (struct gdbarch *gdbarch, struct type *valtype, + struct regcache *regcache, void *readbuf, + const void *writebuf) +{ + /* NOTE: cagney/2004-06-13: The gcc_p parameter to + USE_STRUCT_CONVENTION isn't used. */ + int struct_return = ((TYPE_CODE (valtype) == TYPE_CODE_STRUCT + || TYPE_CODE (valtype) == TYPE_CODE_UNION + || TYPE_CODE (valtype) == TYPE_CODE_ARRAY) + && DEPRECATED_USE_STRUCT_CONVENTION (0, valtype)); + + if (writebuf != NULL) + { + gdb_assert (!struct_return); + /* NOTE: cagney/2004-06-13: See stack.c:return_command. Old + architectures don't expect STORE_RETURN_VALUE to handle small + structures. Should not be called with such types. */ + gdb_assert (TYPE_CODE (valtype) != TYPE_CODE_STRUCT + && TYPE_CODE (valtype) != TYPE_CODE_UNION); + STORE_RETURN_VALUE (valtype, regcache, writebuf); + } + + if (readbuf != NULL) + { + gdb_assert (!struct_return); + EXTRACT_RETURN_VALUE (valtype, regcache, readbuf); + } + + if (struct_return) + return RETURN_VALUE_STRUCT_CONVENTION; + else + return RETURN_VALUE_REGISTER_CONVENTION; +} int legacy_register_sim_regno (int regnum) diff --git a/gdb/arch-utils.h b/gdb/arch-utils.h index de5ab3c..4d1e48e 100644 --- a/gdb/arch-utils.h +++ b/gdb/arch-utils.h @@ -1,7 +1,7 @@ /* Dynamic architecture support for GDB, the GNU debugger. - Copyright 1998, 1999, 2000, 2002, 2003 Free Software Foundation, - Inc. + Copyright 1998, 1999, 2000, 2002, 2003, 2004 Free Software + Foundation, Inc. This file is part of GDB. @@ -32,6 +32,15 @@ struct gdbarch_info; /* gdbarch trace variable */ extern int gdbarch_debug; +/* An implementation of return_value that props up architectures still + using USE_STRUCT_RETURN, EXTRACT_RETURN_VALUE and + STORE_RETURN_VALUE. See also the hacks in "stack.c". */ +enum return_value_convention legacy_return_value (struct gdbarch *gdbarch, + struct type *valtype, + struct regcache *regcache, + void *readbuf, + const void *writebuf); + /* Implementation of extract return value that grubs around in the register cache. */ extern gdbarch_extract_return_value_ftype legacy_extract_return_value; diff --git a/gdb/gdbarch.c b/gdb/gdbarch.c index edb6bd7..20173af 100644 --- a/gdb/gdbarch.c +++ b/gdb/gdbarch.c @@ -457,6 +457,7 @@ gdbarch_alloc (const struct gdbarch_info *info, current_gdbarch->convert_register_p = generic_convert_register_p; current_gdbarch->pointer_to_address = unsigned_pointer_to_address; current_gdbarch->address_to_pointer = unsigned_address_to_pointer; + current_gdbarch->return_value = legacy_return_value; current_gdbarch->extract_return_value = legacy_extract_return_value; current_gdbarch->store_return_value = legacy_store_return_value; current_gdbarch->deprecated_use_struct_convention = generic_use_struct_convention; @@ -3456,7 +3457,7 @@ int gdbarch_return_value_p (struct gdbarch *gdbarch) { gdb_assert (gdbarch != NULL); - return gdbarch->return_value != NULL; + return gdbarch->return_value != legacy_return_value; } enum return_value_convention @@ -3464,6 +3465,7 @@ gdbarch_return_value (struct gdbarch *gdbarch, struct type *valtype, struct regc { gdb_assert (gdbarch != NULL); gdb_assert (gdbarch->return_value != NULL); + /* Do not check predicate: gdbarch->return_value != legacy_return_value, allow call. */ if (gdbarch_debug >= 2) fprintf_unfiltered (gdb_stdlog, "gdbarch_return_value called\n"); return gdbarch->return_value (gdbarch, valtype, regcache, readbuf, writebuf); diff --git a/gdb/gdbarch.h b/gdb/gdbarch.h index 99b8ebe..ae4e70b 100644 --- a/gdb/gdbarch.h +++ b/gdb/gdbarch.h @@ -1093,7 +1093,10 @@ extern void set_gdbarch_deprecated_store_struct_return (struct gdbarch *gdbarch, /* It has been suggested that this, well actually its predecessor, should take the type/value of the function to be called and not the - return type. This is left as an exercise for the reader. */ + return type. This is left as an exercise for the reader. + NOTE: cagney/2004-06-13: The function stack.c:return_command uses + the predicate with default hack to avoid calling STORE_RETURN_VALUE + (via legacy_return_value), when a small struct is involved. */ extern int gdbarch_return_value_p (struct gdbarch *gdbarch); diff --git a/gdb/gdbarch.sh b/gdb/gdbarch.sh index cd716f6..ac00784 100755 --- a/gdb/gdbarch.sh +++ b/gdb/gdbarch.sh @@ -541,7 +541,11 @@ F:DEPRECATED_STORE_STRUCT_RETURN:void:deprecated_store_struct_return:CORE_ADDR a # should take the type/value of the function to be called and not the # return type. This is left as an exercise for the reader. -M::enum return_value_convention:return_value:struct type *valtype, struct regcache *regcache, void *readbuf, const void *writebuf:valtype, regcache, readbuf, writebuf +# NOTE: cagney/2004-06-13: The function stack.c:return_command uses +# the predicate with default hack to avoid calling STORE_RETURN_VALUE +# (via legacy_return_value), when a small struct is involved. + +M:::enum return_value_convention:return_value:struct type *valtype, struct regcache *regcache, void *readbuf, const void *writebuf:valtype, regcache, readbuf, writebuf:::legacy_return_value # The deprecated methods EXTRACT_RETURN_VALUE, STORE_RETURN_VALUE, # DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS and diff --git a/gdb/infcall.c b/gdb/infcall.c index 8d89101..9e3e479 100644 --- a/gdb/infcall.c +++ b/gdb/infcall.c @@ -939,7 +939,7 @@ the function call).", name); "struct return convention", check that PUSH_DUMMY_CALL isn't playing tricks. */ retval = value_at (value_type, struct_addr, NULL); - else if (gdbarch_return_value_p (current_gdbarch)) + else { /* This code only handles "register convention". */ retval = allocate_value (value_type); @@ -950,15 +950,6 @@ the function call).", name); VALUE_CONTENTS_RAW (retval) /*read*/, NULL /*write*/); } - else - { - /* NOTE: cagney/2003-10-20: Unlike "gdbarch_return_value", the - EXTRACT_RETURN_VALUE and DEPRECATED_USE_STRUCT_CONVENTION - methods do not handle the edge case of a function returning - a small structure / union in registers. */ - retval = allocate_value (value_type); - EXTRACT_RETURN_VALUE (value_type, retbuf, VALUE_CONTENTS_RAW (retval)); - } do_cleanups (retbuf_cleanup); return retval; } diff --git a/gdb/infcmd.c b/gdb/infcmd.c index 3aa6e41..46d57be 100644 --- a/gdb/infcmd.c +++ b/gdb/infcmd.c @@ -1091,36 +1091,20 @@ print_return_value (int struct_return, struct type *value_type) inferior function call code. In fact, when inferior function calls are made async, this will likely be made the norm. */ - if (gdbarch_return_value_p (gdbarch)) - { - switch (gdbarch_return_value (gdbarch, value_type, NULL, NULL, NULL)) - { - case RETURN_VALUE_REGISTER_CONVENTION: - case RETURN_VALUE_ABI_RETURNS_ADDRESS: - value = allocate_value (value_type); - CHECK_TYPEDEF (value_type); - gdbarch_return_value (current_gdbarch, value_type, stop_registers, - VALUE_CONTENTS_RAW (value), NULL); - break; - case RETURN_VALUE_STRUCT_CONVENTION: - value = NULL; - break; - default: - internal_error (__FILE__, __LINE__, "bad switch"); - } - } - else if (struct_return && DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS_P ()) - { - CORE_ADDR addr = DEPRECATED_EXTRACT_STRUCT_VALUE_ADDRESS (stop_registers); - if (!addr) - error ("Function return value unknown."); - value = value_at (value_type, addr, NULL); - } - else + switch (gdbarch_return_value (gdbarch, value_type, NULL, NULL, NULL)) { + case RETURN_VALUE_REGISTER_CONVENTION: + case RETURN_VALUE_ABI_RETURNS_ADDRESS: value = allocate_value (value_type); - EXTRACT_RETURN_VALUE (value_type, stop_registers, - VALUE_CONTENTS_RAW (value)); + CHECK_TYPEDEF (value_type); + gdbarch_return_value (current_gdbarch, value_type, stop_registers, + VALUE_CONTENTS_RAW (value), NULL); + break; + case RETURN_VALUE_STRUCT_CONVENTION: + value = NULL; + break; + default: + internal_error (__FILE__, __LINE__, "bad switch"); } if (value) diff --git a/gdb/stack.c b/gdb/stack.c index ac4434c..ce986c7 100644 --- a/gdb/stack.c +++ b/gdb/stack.c @@ -1870,24 +1870,12 @@ If you continue, the return value that you specified will be ignored.\n"; if (return_value != NULL) { struct type *return_type = VALUE_TYPE (return_value); - if (!gdbarch_return_value_p (current_gdbarch)) - { - STORE_RETURN_VALUE (return_type, current_regcache, - VALUE_CONTENTS (return_value)); - } - /* FIXME: cagney/2004-01-17: If extract_returned_value_address - is available and the function is using - RETURN_VALUE_STRUCT_CONVENTION, should use it to find the - address of the returned value so that it can be assigned. */ - else - { - gdb_assert (gdbarch_return_value (current_gdbarch, return_type, - NULL, NULL, NULL) - == RETURN_VALUE_REGISTER_CONVENTION); - gdbarch_return_value (current_gdbarch, return_type, - current_regcache, NULL /*read*/, - VALUE_CONTENTS (return_value) /*write*/); - } + gdb_assert (gdbarch_return_value (current_gdbarch, return_type, + NULL, NULL, NULL) + == RETURN_VALUE_REGISTER_CONVENTION); + gdbarch_return_value (current_gdbarch, return_type, + current_regcache, NULL /*read*/, + VALUE_CONTENTS (return_value) /*write*/); } /* If we are at the end of a call dummy now, pop the dummy frame diff --git a/gdb/values.c b/gdb/values.c index 1b8e9b4..a42e53a 100644 --- a/gdb/values.c +++ b/gdb/values.c @@ -1247,20 +1247,6 @@ using_struct_return (struct type *value_type, int gcc_p) code in "print_return_value". */ return 0; - if (!gdbarch_return_value_p (current_gdbarch)) - { - /* FIXME: cagney/2003-10-01: The below is dead. Instead an - architecture should implement "gdbarch_return_value". Using - that new function it is possible to exactly specify the ABIs - "struct return" vs "register return" conventions. */ - if (code == TYPE_CODE_STRUCT - || code == TYPE_CODE_UNION - || code == TYPE_CODE_ARRAY) - return DEPRECATED_USE_STRUCT_CONVENTION (gcc_p, value_type); - else - return 0; - } - /* Probe the architecture for the return-value convention. */ return (gdbarch_return_value (current_gdbarch, value_type, NULL, NULL, NULL) |