On Mon, Nov 08, 2021 at 08:48:07PM +0100, Jakub Jelinek via Gcc-patches wrote:
> On Mon, Nov 08, 2021 at 12:46:04PM +0100, Jakub Jelinek via Gcc-patches wrote:
> > So, if we want to make PCH work for PIEs, I'd say we can:
> > 1) add a new GTY option, say callback, which would act like
> > skip for non-PCH and for PCH would make us skip it but
> > remember for address bias translation
> > 2) drop the skip for tree_translation_unit_decl::language
> > 3) change get_unnamed_section to have const char * as
> > last argument instead of const void *, change
> > unnamed_section::data also to const char * and update
> > everything related to that
> > 4) maybe add a host hook whether it is ok to support binaries
> > changing addresses (the only thing I'm worried is if
> > some host that uses function descriptors allocates them
> > dynamically instead of having them somewhere in the
> > executable)
> > 5) maybe add a gengtype warning if it sees in GTY tracked
> > structure a function pointer without that new callback
> > option
>
> So, here is 1), 2), 3) implemented. With this patch alone,
> g++.dg/pch/system-2.C test ICEs. This is because GCC 12 has added
> function::x_range_query member, which is set to &global_ranges on
> cfun creation and is:
> range_query * GTY ((skip)) x_range_query;
> which means when a PIE binary writes PCH and a PIE binary loaded
> at a different address loads it, cfun->x_range_query might be a garbage
> pointer. We can either apply a patch like the attached one after
> this inline patch, but then probably callback is misnamed and we should
> rename it to relocate_and_skip or something similar. Or we could
> e.g. during gimplification overwrite cfun->x_range_query = &global_ranges.
> Other than that make check-gcc check-g++ passes RUNTESTFLAGS=pch.exp.
>
> Note, on stdc++.h.gch/O2g.gch there are just those 10 relocations without
> the second patch, with it a few more, but nothing huge. And for non-PIEs
> there isn't really any extra work on the load side except freading two scalar
> values and fseek.
Here is an updated version (the previous version doesn't apply any longer
in gt_pch_restore due to the line_maps saving/restoring changes).
Bootstrapped/regtested on x86_64-linux and i686-linux with
--enable-host-shared in addition to normal configure options (and without
Ada which doesn't even with the above options build PIC libgnat.a and links
it) and a hack:
--- gcc/configure.ac.jj 2021-10-28 22:12:31.569299780 +0200
+++ gcc/configure.ac 2021-11-09 11:34:33.453776105 +0100
@@ -7566,7 +7566,7 @@ AC_CACHE_CHECK([for -no-pie option],
[gcc_cv_no_pie=no])
LDFLAGS="$saved_LDFLAGS"])
if test "$gcc_cv_no_pie" = "yes"; then
- NO_PIE_FLAG="-no-pie"
+ NO_PIE_FLAG="-pie"
fi
AC_SUBST([NO_PIE_FLAG])
to force binaries be PIE, no regressions against non-PIC/PIE build
without this patch. Ok for trunk?
2021-11-18 Jakub Jelinek <ja...@redhat.com>
PR pch/71934
gcc/
* ggc.h (gt_pch_note_callback): Declare.
* gengtype.h (enum typekind): Add TYPE_CALLBACK.
(callback_type): Declare.
* gengtype.c (dbgprint_count_type_at): Handle TYPE_CALLBACK.
(callback_type): New variable.
(process_gc_options): Add CALLBACK argument, handle callback
option.
(set_gc_used_type): Adjust process_gc_options caller, if callback,
set type to &callback_type.
(output_mangled_typename): Handle TYPE_CALLBACK.
(walk_type): Likewise. Handle callback option.
(write_types_process_field): Handle TYPE_CALLBACK.
(write_types_local_user_process_field): Likewise.
(write_types_local_process_field): Likewise.
(write_root): Likewise.
(dump_typekind): Likewise.
(dump_type): Likewise.
* gengtype-state.c (type_lineloc): Handle TYPE_CALLBACK.
(state_writer::write_state_callback_type): New method.
(state_writer::write_state_type): Handle TYPE_CALLBACK.
(read_state_callback_type): New function.
(read_state_type): Handle TYPE_CALLBACK.
* ggc-common.c (callback_vec): New variable.
(gt_pch_note_callback): New function.
(gt_pch_save): Stream out gt_pch_save function address and relocation
table.
(gt_pch_restore): Stream in saved gt_pch_save function address and
relocation table and apply relocations if needed.
* doc/gty.texi (callback): Document new GTY option.
* varasm.c (get_unnamed_section): Change callback argument's type and
last argument's type from const void * to const char *.
(output_section_asm_op): Change argument's type from const void *
to const char *, remove unnecessary cast.
* tree-core.h (struct tree_translation_unit_decl): Drop GTY((skip))
from language member.
* output.h (unnamed_section_callback): Change argument type from
const void * to const char *.
(struct unnamed_section): Use GTY((callback)) instead of GTY((skip))
for callback member. Change data member type from const void *
to const char *.
(struct noswitch_section): Use GTY((callback)) instead of GTY((skip))
for callback member.
(get_unnamed_section): Change callback argument's type and
last argument's type from const void * to const char *.
(output_section_asm_op): Change argument's type from const void *
to const char *.
* config/avr/avr.c (avr_output_progmem_section_asm_op): Likewise.
Remove unneeded cast.
* config/darwin.c (output_objc_section_asm_op): Change argument's type
from const void * to const char *.
* config/pa/pa.c (som_output_text_section_asm_op): Likewise.
(som_output_comdat_data_section_asm_op): Likewise.
* config/rs6000/rs6000.c (rs6000_elf_output_toc_section_asm_op):
Likewise.
(rs6000_xcoff_output_readonly_section_asm_op): Likewise. Instead
of dereferencing directive hardcode variable names and decide based on
whether directive is NULL or not.
(rs6000_xcoff_output_readwrite_section_asm_op): Change argument's type
from const void * to const char *.
(rs6000_xcoff_output_tls_section_asm_op): Likewise. Instead
of dereferencing directive hardcode variable names and decide based on
whether directive is NULL or not.
(rs6000_xcoff_output_toc_section_asm_op): Change argument's type
from const void * to const char *.
(rs6000_xcoff_asm_init_sections): Adjust get_unnamed_section callers.
gcc/c-family/
* c-pch.c (struct c_pch_validity): Remove pch_init member.
(pch_init): Don't initialize v.pch_init.
(c_common_valid_pch): Don't warn and punt if .text addresses change.
libcpp/
* include/line-map.h (class line_maps): Add GTY((callback)) to
reallocator and round_alloc_size members.
--- gcc/ggc.h.jj 2021-08-19 11:42:27.366422386 +0200
+++ gcc/ggc.h 2021-11-08 16:46:02.604618109 +0100
@@ -46,6 +46,10 @@ typedef void (*gt_handle_reorder) (void
/* Used by the gt_pch_n_* routines. Register an object in the hash table. */
extern int gt_pch_note_object (void *, void *, gt_note_pointers);
+/* Used by the gt_pch_p_* routines. Register address of a callback
+ pointer. */
+extern void gt_pch_note_callback (void *, void *);
+
/* Used by the gt_pch_n_* routines. Register that an object has a reorder
function. */
extern void gt_pch_note_reorder (void *, void *, gt_handle_reorder);
--- gcc/gengtype.h.jj 2021-07-20 10:08:09.892687719 +0200
+++ gcc/gengtype.h 2021-11-08 15:19:59.194210185 +0100
@@ -154,6 +154,9 @@ enum typekind {
TYPE_UNION, /* Type for GTY-ed discriminated unions. */
TYPE_POINTER, /* Pointer type to GTY-ed type. */
TYPE_ARRAY, /* Array of GTY-ed types. */
+ TYPE_CALLBACK, /* A function pointer that needs relocation if
+ the executable has been loaded at a different
+ address. */
TYPE_LANG_STRUCT, /* GCC front-end language specific structs.
Various languages may have homonymous but
different structs. */
@@ -331,6 +334,9 @@ extern struct type string_type;
extern struct type scalar_nonchar;
extern struct type scalar_char;
+/* The one and only TYPE_CALLBACK. */
+extern struct type callback_type;
+
/* Test if a type is a union, either a plain one or a language
specific one. */
#define UNION_P(x) \
--- gcc/gengtype.c.jj 2021-10-04 10:16:10.885140187 +0200
+++ gcc/gengtype.c 2021-11-08 16:30:41.981750183 +0100
@@ -172,6 +172,7 @@ dbgprint_count_type_at (const char *fil,
int nb_struct = 0, nb_union = 0, nb_array = 0, nb_pointer = 0;
int nb_lang_struct = 0;
int nb_user_struct = 0, nb_undefined = 0;
+ int nb_callback = 0;
type_p p = NULL;
for (p = t; p; p = p->next)
{
@@ -202,6 +203,9 @@ dbgprint_count_type_at (const char *fil,
case TYPE_ARRAY:
nb_array++;
break;
+ case TYPE_CALLBACK:
+ nb_callback++;
+ break;
case TYPE_LANG_STRUCT:
nb_lang_struct++;
break;
@@ -217,6 +221,8 @@ dbgprint_count_type_at (const char *fil,
fprintf (stderr, "@@%%@@ %d structs, %d unions\n", nb_struct, nb_union);
if (nb_pointer > 0 || nb_array > 0)
fprintf (stderr, "@@%%@@ %d pointers, %d arrays\n", nb_pointer, nb_array);
+ if (nb_callback > 0)
+ fprintf (stderr, "@@%%@@ %d callbacks\n", nb_callback);
if (nb_lang_struct > 0)
fprintf (stderr, "@@%%@@ %d lang_structs\n", nb_lang_struct);
if (nb_user_struct > 0)
@@ -495,6 +501,10 @@ struct type scalar_char = {
TYPE_SCALAR, 0, 0, 0, GC_USED, {0}
};
+struct type callback_type = {
+ TYPE_CALLBACK, 0, 0, 0, GC_USED, {0}
+};
+
/* Lists of various things. */
pair_p typedefs = NULL;
@@ -1464,7 +1474,7 @@ static void set_gc_used (pair_p);
static void
process_gc_options (options_p opt, enum gc_used_enum level, int *maybe_undef,
- int *length, int *skip, type_p *nested_ptr)
+ int *length, int *skip, int *callback, type_p *nested_ptr)
{
options_p o;
for (o = opt; o; o = o->next)
@@ -1478,6 +1488,8 @@ process_gc_options (options_p opt, enum
*length = 1;
else if (strcmp (o->name, "skip") == 0)
*skip = 1;
+ else if (strcmp (o->name, "callback") == 0)
+ *callback = 1;
else if (strcmp (o->name, "nested_ptr") == 0
&& o->kind == OPTION_NESTED)
*nested_ptr = ((const struct nested_ptr_data *) o->info.nested)->type;
@@ -1526,7 +1538,7 @@ set_gc_used_type (type_p t, enum gc_used
type_p dummy2;
bool allow_undefined_field_types = (t->kind == TYPE_USER_STRUCT);
- process_gc_options (t->u.s.opt, level, &dummy, &dummy, &dummy,
+ process_gc_options (t->u.s.opt, level, &dummy, &dummy, &dummy, &dummy,
&dummy2);
if (t->u.s.base_class)
@@ -1542,9 +1554,10 @@ set_gc_used_type (type_p t, enum gc_used
int maybe_undef = 0;
int length = 0;
int skip = 0;
+ int callback = 0;
type_p nested_ptr = NULL;
process_gc_options (f->opt, level, &maybe_undef, &length, &skip,
- &nested_ptr);
+ &callback, &nested_ptr);
if (nested_ptr && f->type->kind == TYPE_POINTER)
set_gc_used_type (nested_ptr, GC_POINTED_TO);
@@ -1554,6 +1567,8 @@ set_gc_used_type (type_p t, enum gc_used
set_gc_used_type (f->type->u.p, GC_MAYBE_POINTED_TO);
else if (skip)
; /* target type is not used through this field */
+ else if (callback)
+ f->type = &callback_type;
else
set_gc_used_type (f->type, GC_USED, allow_undefined_field_types);
}
@@ -2519,6 +2534,7 @@ output_mangled_typename (outf_p of, cons
{
case TYPE_NONE:
case TYPE_UNDEFINED:
+ case TYPE_CALLBACK:
gcc_unreachable ();
break;
case TYPE_POINTER:
@@ -2719,6 +2735,8 @@ walk_type (type_p t, struct walk_type_da
;
else if (strcmp (oo->name, "for_user") == 0)
;
+ else if (strcmp (oo->name, "callback") == 0)
+ ;
else
error_at_line (d->line, "unknown option `%s'\n", oo->name);
@@ -2744,6 +2762,7 @@ walk_type (type_p t, struct walk_type_da
{
case TYPE_SCALAR:
case TYPE_STRING:
+ case TYPE_CALLBACK:
d->process_field (t, d);
break;
@@ -3275,6 +3294,7 @@ write_types_process_field (type_p f, con
break;
case TYPE_SCALAR:
+ case TYPE_CALLBACK:
break;
case TYPE_ARRAY:
@@ -3820,6 +3840,7 @@ write_types_local_user_process_field (ty
break;
case TYPE_SCALAR:
+ case TYPE_CALLBACK:
break;
case TYPE_ARRAY:
@@ -3906,6 +3927,13 @@ write_types_local_process_field (type_p
case TYPE_SCALAR:
break;
+ case TYPE_CALLBACK:
+ oprintf (d->of, "%*sif ((void *)(%s) == this_obj)\n", d->indent, "",
+ d->prev_val[3]);
+ oprintf (d->of, "%*s gt_pch_note_callback (&(%s), this_obj);\n",
+ d->indent, "", d->val);
+ break;
+
case TYPE_ARRAY:
case TYPE_NONE:
case TYPE_UNDEFINED:
@@ -4434,6 +4462,7 @@ write_root (outf_p f, pair_p v, type_p t
case TYPE_UNDEFINED:
case TYPE_UNION:
case TYPE_LANG_STRUCT:
+ case TYPE_CALLBACK:
error_at_line (line, "global `%s' is unimplemented type", name);
}
}
@@ -4728,6 +4757,9 @@ dump_typekind (int indent, enum typekind
case TYPE_ARRAY:
printf ("TYPE_ARRAY");
break;
+ case TYPE_CALLBACK:
+ printf ("TYPE_CALLBACK");
+ break;
case TYPE_LANG_STRUCT:
printf ("TYPE_LANG_STRUCT");
break;
@@ -4894,6 +4926,7 @@ dump_type (int indent, type_p t)
t->u.scalar_is_char ? "true" : "false");
break;
case TYPE_STRING:
+ case TYPE_CALLBACK:
break;
case TYPE_STRUCT:
case TYPE_UNION:
--- gcc/varasm.c.jj 2021-09-28 11:34:29.343147261 +0200
+++ gcc/varasm.c 2021-11-08 13:26:15.032606040 +0100
@@ -250,8 +250,8 @@ object_block_hasher::hash (object_block
/* Return a new unnamed section with the given fields. */
section *
-get_unnamed_section (unsigned int flags, void (*callback) (const void *),
- const void *data)
+get_unnamed_section (unsigned int flags, void (*callback) (const char *),
+ const char *data)
{
section *sect;
@@ -7778,9 +7778,9 @@ file_end_indicate_split_stack (void)
a get_unnamed_section callback. */
void
-output_section_asm_op (const void *directive)
+output_section_asm_op (const char *directive)
{
- fprintf (asm_out_file, "%s\n", (const char *) directive);
+ fprintf (asm_out_file, "%s\n", directive);
}
/* Emit assembly code to switch to section NEW_SECTION. Do nothing if
--- gcc/ggc-common.c.jj 2021-11-08 11:09:50.280318624 +0100
+++ gcc/ggc-common.c 2021-11-17 20:10:07.088187637 +0100
@@ -246,6 +246,7 @@ saving_hasher::equal (const ptr_data *p1
}
static hash_table<saving_hasher> *saving_htab;
+static vec<void *> callback_vec;
/* Register an object in the hash table. */
@@ -278,6 +279,23 @@ gt_pch_note_object (void *obj, void *not
return 1;
}
+/* Register address of a callback pointer. */
+void
+gt_pch_note_callback (void *obj, void *base)
+{
+ void *ptr;
+ memcpy (&ptr, obj, sizeof (void *));
+ if (ptr != NULL)
+ {
+ struct ptr_data *data
+ = (struct ptr_data *)
+ saving_htab->find_with_hash (base, POINTER_HASH (base));
+ gcc_assert (data);
+ callback_vec.safe_push ((char *) data->new_addr
+ + ((char *) obj - (char *) base));
+ }
+}
+
/* Register an object in the hash table. */
void
@@ -576,10 +594,20 @@ gt_pch_save (FILE *f)
ggc_pch_finish (state.d, state.f);
gt_pch_fixup_stringpool ();
+ unsigned num_callbacks = callback_vec.length ();
+ void (*pch_save) (FILE *) = >_pch_save;
+ if (fwrite (&pch_save, sizeof (pch_save), 1, f) != 1
+ || fwrite (&num_callbacks, sizeof (num_callbacks), 1, f) != 1
+ || (num_callbacks
+ && fwrite (callback_vec.address (), sizeof (void *), num_callbacks,
+ f) != num_callbacks))
+ fatal_error (input_location, "cannot write PCH file: %m");
+
XDELETE (state.ptrs);
XDELETE (this_object);
delete saving_htab;
saving_htab = NULL;
+ callback_vec.release ();
}
/* Read the state of the compiler back in from F. */
@@ -661,6 +689,30 @@ gt_pch_restore (FILE *f)
gt_pch_restore_stringpool ();
+ void (*pch_save) (FILE *);
+ unsigned num_callbacks;
+ if (fread (&pch_save, sizeof (pch_save), 1, f) != 1
+ || fread (&num_callbacks, sizeof (num_callbacks), 1, f) != 1)
+ fatal_error (input_location, "cannot read PCH file: %m");
+ if (pch_save != >_pch_save)
+ {
+ uintptr_t bias = (uintptr_t) >_pch_save - (uintptr_t) pch_save;
+ void **ptrs = XNEWVEC (void *, num_callbacks);
+ unsigned i;
+
+ if (fread (ptrs, sizeof (void *), num_callbacks, f) != num_callbacks)
+ fatal_error (input_location, "cannot read PCH file: %m");
+ for (i = 0; i < num_callbacks; ++i)
+ {
+ memcpy (&pch_save, ptrs[i], sizeof (pch_save));
+ pch_save = (void (*) (FILE *)) ((uintptr_t) pch_save + bias);
+ memcpy (ptrs[i], &pch_save, sizeof (pch_save));
+ }
+ XDELETE (ptrs);
+ }
+ else if (fseek (f, num_callbacks * sizeof (void *), SEEK_CUR) != 0)
+ fatal_error (input_location, "cannot read PCH file: %m");
+
/* Barring corruption of the PCH file, the restored line table should be
complete and usable. */
line_table = new_line_table;
--- gcc/doc/gty.texi.jj 2021-08-19 11:42:27.363422428 +0200
+++ gcc/doc/gty.texi 2021-11-08 17:13:46.613882767 +0100
@@ -197,6 +197,15 @@ If @code{skip} is applied to a field, th
This is somewhat dangerous; the only safe use is in a union when one
field really isn't ever used.
+@findex callback
+@item callback
+
+@code{callback} should be applied to fields with pointer to function type
+and causes the field to be ignored similarly to @code{skip}, except when
+writing PCH and the field is non-NULL it will remember the field's address
+for relocation purposes if the process writing PCH has different load base
+from a process reading PCH.
+
@findex for_user
@item for_user
--- gcc/tree-core.h.jj 2021-11-04 12:27:02.377298411 +0100
+++ gcc/tree-core.h 2021-11-08 13:24:04.496465555 +0100
@@ -1964,7 +1964,7 @@ struct GTY(()) tree_function_decl {
struct GTY(()) tree_translation_unit_decl {
struct tree_decl_common common;
/* Source language of this translation unit. Used for DWARF output. */
- const char * GTY((skip(""))) language;
+ const char *language;
/* TODO: Non-optimization used to build this translation unit. */
/* TODO: Root of a partial DWARF tree for global types and decls. */
};
--- gcc/gengtype-state.c.jj 2021-07-20 10:08:09.891687732 +0200
+++ gcc/gengtype-state.c 2021-11-08 15:19:16.157824146 +0100
@@ -57,6 +57,7 @@ type_lineloc (const_type_p ty)
case TYPE_STRING:
case TYPE_POINTER:
case TYPE_ARRAY:
+ case TYPE_CALLBACK:
return NULL;
default:
gcc_unreachable ();
@@ -171,6 +172,7 @@ private:
void write_state_version (const char *version);
void write_state_scalar_type (type_p current);
void write_state_string_type (type_p current);
+ void write_state_callback_type (type_p current);
void write_state_undefined_type (type_p current);
void write_state_struct_union_type (type_p current, const char *kindstr);
void write_state_struct_type (type_p current);
@@ -898,6 +900,20 @@ state_writer::write_state_string_type (t
fatal ("Unexpected type in write_state_string_type");
}
+/* Write the callback type. There is only one such thing! */
+void
+state_writer::write_state_callback_type (type_p current)
+{
+ if (current == &callback_type)
+ {
+ write_any_indent (0);
+ fprintf (state_file, "callback ");
+ write_state_common_type_content (current);
+ }
+ else
+ fatal ("Unexpected type in write_state_callback_type");
+}
+
/* Write an undefined type. */
void
state_writer::write_state_undefined_type (type_p current)
@@ -1143,6 +1159,9 @@ state_writer::write_state_type (type_p c
case TYPE_STRING:
write_state_string_type (current);
break;
+ case TYPE_CALLBACK:
+ write_state_callback_type (current);
+ break;
}
}
@@ -1477,6 +1496,14 @@ read_state_string_type (type_p *type)
read_state_common_type_content (*type);
}
+/* Read the callback_type. */
+static void
+read_state_callback_type (type_p *type)
+{
+ *type = &callback_type;
+ read_state_common_type_content (*type);
+}
+
/* Read a lang_bitmap representing a set of GCC front-end languages. */
static void
@@ -1834,6 +1861,11 @@ read_state_type (type_p *current)
next_state_tokens (1);
read_state_string_type (current);
}
+ else if (state_token_is_name (t0, "callback"))
+ {
+ next_state_tokens (1);
+ read_state_callback_type (current);
+ }
else if (state_token_is_name (t0, "undefined"))
{
*current = XCNEW (struct type);
--- gcc/output.h.jj 2021-09-28 11:34:29.235148754 +0200
+++ gcc/output.h 2021-11-08 16:26:01.172755377 +0100
@@ -470,7 +470,7 @@ struct GTY(()) named_section {
/* A callback that writes the assembly code for switching to an unnamed
section. The argument provides callback-specific data. */
-typedef void (*unnamed_section_callback) (const void *);
+typedef void (*unnamed_section_callback) (const char *);
/* Information about a SECTION_UNNAMED section. */
struct GTY(()) unnamed_section {
@@ -478,8 +478,8 @@ struct GTY(()) unnamed_section {
/* The callback used to switch to the section, and the data that
should be passed to the callback. */
- unnamed_section_callback GTY ((skip)) callback;
- const void *GTY ((skip)) data;
+ unnamed_section_callback GTY ((callback)) callback;
+ const char *data;
/* The next entry in the chain of unnamed sections. */
section *next;
@@ -503,7 +503,7 @@ struct GTY(()) noswitch_section {
struct section_common common;
/* The callback used to assemble decls in this section. */
- noswitch_section_callback GTY ((skip)) callback;
+ noswitch_section_callback GTY ((callback)) callback;
};
/* Information about a section, which may be named or unnamed. */
@@ -538,8 +538,8 @@ extern GTY(()) section *bss_noswitch_sec
extern GTY(()) section *in_section;
extern GTY(()) bool in_cold_section_p;
-extern section *get_unnamed_section (unsigned int, void (*) (const void *),
- const void *);
+extern section *get_unnamed_section (unsigned int, void (*) (const char *),
+ const char *);
extern section *get_section (const char *, unsigned int, tree,
bool not_existing = false);
extern section *get_named_section (tree, const char *, int);
@@ -561,7 +561,7 @@ extern section *get_cdtor_priority_secti
extern bool unlikely_text_section_p (section *);
extern void switch_to_section (section *, tree = nullptr);
-extern void output_section_asm_op (const void *);
+extern void output_section_asm_op (const char *);
extern void record_tm_clone_pair (tree, tree);
extern void finish_tm_clone_pairs (void);
--- gcc/config/avr/avr.c.jj 2021-07-15 10:16:12.873583249 +0200
+++ gcc/config/avr/avr.c 2021-11-08 13:28:30.215676387 +0100
@@ -10114,10 +10114,9 @@ avr_output_bss_section_asm_op (const voi
/* Unnamed section callback for progmem*.data sections. */
static void
-avr_output_progmem_section_asm_op (const void *data)
+avr_output_progmem_section_asm_op (const char *data)
{
- fprintf (asm_out_file, "\t.section\t%s,\"a\",@progbits\n",
- (const char*) data);
+ fprintf (asm_out_file, "\t.section\t%s,\"a\",@progbits\n", data);
}
--- gcc/config/darwin.c.jj 2021-10-21 10:23:27.450834602 +0200
+++ gcc/config/darwin.c 2021-11-08 13:27:19.106691421 +0100
@@ -134,7 +134,7 @@ int emit_aligned_common = false;
DIRECTIVE is as for output_section_asm_op. */
static void
-output_objc_section_asm_op (const void *directive)
+output_objc_section_asm_op (const char *directive)
{
static bool been_here = false;
--- gcc/config/pa/pa.c.jj 2021-10-27 09:00:28.762277456 +0200
+++ gcc/config/pa/pa.c 2021-11-08 13:29:41.935652629 +0100
@@ -10011,7 +10011,7 @@ pa_arg_partial_bytes (cumulative_args_t
to the default text subspace. */
static void
-som_output_text_section_asm_op (const void *data ATTRIBUTE_UNUSED)
+som_output_text_section_asm_op (const char *data ATTRIBUTE_UNUSED)
{
gcc_assert (TARGET_SOM);
if (TARGET_GAS)
@@ -10055,7 +10055,7 @@ som_output_text_section_asm_op (const vo
sections. This function is only used with SOM. */
static void
-som_output_comdat_data_section_asm_op (const void *data)
+som_output_comdat_data_section_asm_op (const char *data)
{
in_section = NULL;
output_section_asm_op (data);
--- gcc/config/rs6000/rs6000.c.jj 2021-11-05 00:43:22.476626062 +0100
+++ gcc/config/rs6000/rs6000.c 2021-11-08 13:43:22.415940789 +0100
@@ -20597,7 +20597,7 @@ rs6000_ms_bitfield_layout_p (const_tree
/* A get_unnamed_section callback, used for switching to toc_section. */
static void
-rs6000_elf_output_toc_section_asm_op (const void *data ATTRIBUTE_UNUSED)
+rs6000_elf_output_toc_section_asm_op (const char *data ATTRIBUTE_UNUSED)
{
if ((DEFAULT_ABI == ABI_AIX || DEFAULT_ABI == ABI_ELFv2)
&& TARGET_MINIMAL_TOC)
@@ -21301,35 +21301,39 @@ rs6000_xcoff_asm_globalize_label (FILE *
points to the section string variable. */
static void
-rs6000_xcoff_output_readonly_section_asm_op (const void *directive)
+rs6000_xcoff_output_readonly_section_asm_op (const char *directive)
{
fprintf (asm_out_file, "\t.csect %s[RO],%s\n",
- *(const char *const *) directive,
+ directive
+ ? xcoff_private_rodata_section_name
+ : xcoff_read_only_section_name,
XCOFF_CSECT_DEFAULT_ALIGNMENT_STR);
}
/* Likewise for read-write sections. */
static void
-rs6000_xcoff_output_readwrite_section_asm_op (const void *directive)
+rs6000_xcoff_output_readwrite_section_asm_op (const char *)
{
fprintf (asm_out_file, "\t.csect %s[RW],%s\n",
- *(const char *const *) directive,
+ xcoff_private_data_section_name,
XCOFF_CSECT_DEFAULT_ALIGNMENT_STR);
}
static void
-rs6000_xcoff_output_tls_section_asm_op (const void *directive)
+rs6000_xcoff_output_tls_section_asm_op (const char *directive)
{
fprintf (asm_out_file, "\t.csect %s[TL],%s\n",
- *(const char *const *) directive,
+ directive
+ ? xcoff_private_data_section_name
+ : xcoff_tls_data_section_name,
XCOFF_CSECT_DEFAULT_ALIGNMENT_STR);
}
/* A get_unnamed_section callback, used for switching to toc_section. */
static void
-rs6000_xcoff_output_toc_section_asm_op (const void *data ATTRIBUTE_UNUSED)
+rs6000_xcoff_output_toc_section_asm_op (const char *data ATTRIBUTE_UNUSED)
{
if (TARGET_MINIMAL_TOC)
{
@@ -21356,26 +21360,26 @@ rs6000_xcoff_asm_init_sections (void)
{
read_only_data_section
= get_unnamed_section (0, rs6000_xcoff_output_readonly_section_asm_op,
- &xcoff_read_only_section_name);
+ NULL);
private_data_section
= get_unnamed_section (SECTION_WRITE,
rs6000_xcoff_output_readwrite_section_asm_op,
- &xcoff_private_data_section_name);
+ NULL);
read_only_private_data_section
= get_unnamed_section (0, rs6000_xcoff_output_readonly_section_asm_op,
- &xcoff_private_rodata_section_name);
+ "");
tls_data_section
= get_unnamed_section (SECTION_TLS,
rs6000_xcoff_output_tls_section_asm_op,
- &xcoff_tls_data_section_name);
+ NULL);
tls_private_data_section
= get_unnamed_section (SECTION_TLS,
rs6000_xcoff_output_tls_section_asm_op,
- &xcoff_private_data_section_name);
+ "");
toc_section
= get_unnamed_section (0, rs6000_xcoff_output_toc_section_asm_op, NULL);
--- gcc/c-family/c-pch.c.jj 2021-06-02 10:08:14.149450407 +0200
+++ gcc/c-family/c-pch.c 2021-11-08 17:34:17.302343697 +0100
@@ -54,7 +54,6 @@ struct c_pch_validity
{
uint32_t pch_write_symbols;
signed char match[MATCH_SIZE];
- void (*pch_init) (void);
size_t target_data_length;
};
@@ -117,7 +116,6 @@ pch_init (void)
gcc_assert (v.match[i] == *pch_matching[i].flag_var);
}
}
- v.pch_init = &pch_init;
target_validity = targetm.get_pch_validity (&v.target_data_length);
if (fwrite (partial_pch, IDENT_LENGTH, 1, f) != 1
@@ -278,19 +276,6 @@ c_common_valid_pch (cpp_reader *pfile, c
}
}
- /* If the text segment was not loaded at the same address as it was
- when the PCH file was created, function pointers loaded from the
- PCH will not be valid. We could in theory remap all the function
- pointers, but no support for that exists at present.
- Since we have the same executable, it should only be necessary to
- check one function. */
- if (v.pch_init != &pch_init)
- {
- cpp_warning (pfile, CPP_W_INVALID_PCH,
- "%s: had text segment at different address", name);
- return 2;
- }
-
/* Check the target-specific validity data. */
{
void *this_file_data = xmalloc (v.target_data_length);
--- libcpp/include/line-map.h.jj 2021-11-01 14:37:06.697853154 +0100
+++ libcpp/include/line-map.h 2021-11-08 16:16:34.562837006 +0100
@@ -803,11 +803,11 @@ public:
unsigned int max_column_hint;
/* The allocator to use when resizing 'maps', defaults to xrealloc. */
- line_map_realloc reallocator;
+ line_map_realloc GTY((callback)) reallocator;
/* The allocators' function used to know the actual size it
allocated, for a certain allocation size requested. */
- line_map_round_alloc_size_func round_alloc_size;
+ line_map_round_alloc_size_func GTY((callback)) round_alloc_size;
struct location_adhoc_data_map location_adhoc_data_map;
Jakub
