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-rw-r--r--scripts/gcc-plugins/.gitignore3
-rw-r--r--scripts/gcc-plugins/Kconfig39
-rw-r--r--scripts/gcc-plugins/Makefile95
-rw-r--r--scripts/gcc-plugins/cyc_complexity_plugin.c69
-rw-r--r--scripts/gcc-plugins/gcc-common.h631
-rw-r--r--scripts/gcc-plugins/gcc-generate-gimple-pass.h32
-rw-r--r--scripts/gcc-plugins/gcc-generate-ipa-pass.h43
-rw-r--r--scripts/gcc-plugins/gcc-generate-rtl-pass.h37
-rw-r--r--scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h37
-rw-r--r--scripts/gcc-plugins/gen-random-seed.sh8
-rw-r--r--scripts/gcc-plugins/latent_entropy_plugin.c83
-rw-r--r--scripts/gcc-plugins/randomize_layout_plugin.c249
-rw-r--r--scripts/gcc-plugins/sancov_plugin.c140
-rw-r--r--scripts/gcc-plugins/stackleak_plugin.c635
-rw-r--r--scripts/gcc-plugins/structleak_plugin.c246
15 files changed, 886 insertions, 1461 deletions
diff --git a/scripts/gcc-plugins/.gitignore b/scripts/gcc-plugins/.gitignore
index de92ed9e3d83..5cc385b9eb97 100644
--- a/scripts/gcc-plugins/.gitignore
+++ b/scripts/gcc-plugins/.gitignore
@@ -1 +1,2 @@
-randomize_layout_seed.h
+# SPDX-License-Identifier: GPL-2.0-only
+/randomize_layout_seed.h
diff --git a/scripts/gcc-plugins/Kconfig b/scripts/gcc-plugins/Kconfig
new file mode 100644
index 000000000000..6b34ba19358d
--- /dev/null
+++ b/scripts/gcc-plugins/Kconfig
@@ -0,0 +1,39 @@
+# SPDX-License-Identifier: GPL-2.0-only
+config HAVE_GCC_PLUGINS
+ bool
+ help
+ An arch should select this symbol if it supports building with
+ GCC plugins.
+
+menuconfig GCC_PLUGINS
+ bool "GCC plugins"
+ depends on HAVE_GCC_PLUGINS
+ depends on CC_IS_GCC
+ depends on $(success,test -e $(shell,$(CC) -print-file-name=plugin)/include/plugin-version.h)
+ default y
+ help
+ GCC plugins are loadable modules that provide extra features to the
+ compiler. They are useful for runtime instrumentation and static analysis.
+
+ See Documentation/kbuild/gcc-plugins.rst for details.
+
+if GCC_PLUGINS
+
+config GCC_PLUGIN_LATENT_ENTROPY
+ bool "Generate some entropy during boot and runtime"
+ help
+ By saying Y here the kernel will instrument some kernel code to
+ extract some entropy from both original and artificially created
+ program state. This will help especially embedded systems where
+ there is little 'natural' source of entropy normally. The cost
+ is some slowdown of the boot process (about 0.5%) and fork and
+ irq processing.
+
+ Note that entropy extracted this way is not cryptographically
+ secure!
+
+ This plugin was ported from grsecurity/PaX. More information at:
+ * https://grsecurity.net/
+ * https://pax.grsecurity.net/
+
+endif
diff --git a/scripts/gcc-plugins/Makefile b/scripts/gcc-plugins/Makefile
index 214eb2335c31..05b14aba41ef 100644
--- a/scripts/gcc-plugins/Makefile
+++ b/scripts/gcc-plugins/Makefile
@@ -1,37 +1,72 @@
-GCC_PLUGINS_DIR := $(shell $(CC) -print-file-name=plugin)
-
-ifeq ($(PLUGINCC),$(HOSTCC))
- HOSTLIBS := hostlibs
- HOST_EXTRACFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu99 -ggdb
- export HOST_EXTRACFLAGS
-else
- HOSTLIBS := hostcxxlibs
- HOST_EXTRACXXFLAGS += -I$(GCC_PLUGINS_DIR)/include -I$(src) -std=gnu++98 -fno-rtti
- HOST_EXTRACXXFLAGS += -fno-exceptions -fasynchronous-unwind-tables -ggdb
- HOST_EXTRACXXFLAGS += -Wno-narrowing -Wno-unused-variable
- export HOST_EXTRACXXFLAGS
-endif
-
-ifneq ($(CFLAGS_KCOV), $(SANCOV_PLUGIN))
- GCC_PLUGIN := $(filter-out $(SANCOV_PLUGIN), $(GCC_PLUGIN))
-endif
-
-export HOSTLIBS
-
-$(obj)/randomize_layout_plugin.o: $(objtree)/$(obj)/randomize_layout_seed.h
-quiet_cmd_create_randomize_layout_seed = GENSEED $@
+# SPDX-License-Identifier: GPL-2.0
+
+$(obj)/randomize_layout_plugin.so: $(obj)/randomize_layout_seed.h
+quiet_cmd_create_randomize_layout_seed = SEEDHDR $@
cmd_create_randomize_layout_seed = \
- $(CONFIG_SHELL) $(srctree)/$(src)/gen-random-seed.sh $@ $(objtree)/include/generated/randomize_layout_hash.h
-$(objtree)/$(obj)/randomize_layout_seed.h: FORCE
+ SEED=$$(cat $(filter-out FORCE,$^) </dev/null); \
+ echo '/*' > $@; \
+ echo ' * This file is automatically generated. Keep it private.' >> $@; \
+ echo ' * Exposing this value will expose the layout of randomized structures.' >> $@; \
+ echo ' */' >> $@; \
+ echo "const char *randstruct_seed = \"$$SEED\";" >> $@
+$(obj)/randomize_layout_seed.h: $(objtree)/scripts/basic/randstruct.seed FORCE
$(call if_changed,create_randomize_layout_seed)
-targets = randomize_layout_seed.h randomize_layout_hash.h
+targets += randomize_layout_seed.h
+
+# Build rules for plugins
+#
+# No extra code is needed for single-file plugins.
+# For multi-file plugins, use *-objs syntax to list the objects.
+#
+# If the plugin foo.so is compiled from foo.c and foo2.c, you can do:
+#
+# foo-objs := foo.o foo2.o
+
+always-y += $(GCC_PLUGIN)
-$(HOSTLIBS)-y := $(foreach p,$(GCC_PLUGIN),$(if $(findstring /,$(p)),,$(p)))
-always := $($(HOSTLIBS)-y)
+GCC_PLUGINS_DIR = $(shell $(CC) -print-file-name=plugin)
-$(foreach p,$($(HOSTLIBS)-y:%.so=%),$(eval $(p)-objs := $(p).o))
+plugin_cxxflags = -Wp,-MMD,$(depfile) $(KBUILD_HOSTCXXFLAGS) -fPIC \
+ -include $(srctree)/include/linux/compiler-version.h \
+ -DPLUGIN_VERSION=$(call stringify,$(KERNELVERSION)) \
+ -I $(GCC_PLUGINS_DIR)/include -I $(obj) \
+ -fno-rtti -fno-exceptions -fasynchronous-unwind-tables \
+ -ggdb -Wno-narrowing -Wno-unused-variable \
+ -Wno-format-diag
-subdir-y := $(GCC_PLUGIN_SUBDIR)
-subdir- += $(GCC_PLUGIN_SUBDIR)
+plugin_ldflags = -shared
+plugin-single := $(foreach m, $(GCC_PLUGIN), $(if $($(m:%.so=%-objs)),,$(m)))
+plugin-multi := $(filter-out $(plugin-single), $(GCC_PLUGIN))
+plugin-objs := $(sort $(foreach m, $(plugin-multi), $($(m:%.so=%-objs))))
+
+targets += $(plugin-single) $(plugin-multi) $(plugin-objs)
clean-files += *.so
+
+plugin-single := $(addprefix $(obj)/, $(plugin-single))
+plugin-multi := $(addprefix $(obj)/, $(plugin-multi))
+plugin-objs := $(addprefix $(obj)/, $(plugin-objs))
+
+quiet_cmd_plugin_cxx_so_c = HOSTCXX $@
+ cmd_plugin_cxx_so_c = $(HOSTCXX) $(plugin_cxxflags) $(plugin_ldflags) -o $@ $<
+
+$(plugin-single): $(obj)/%.so: $(src)/%.c FORCE
+ $(call if_changed_dep,plugin_cxx_so_c)
+
+quiet_cmd_plugin_ld_so_o = HOSTLD $@
+ cmd_plugin_ld_so_o = $(HOSTCXX) $(plugin_ldflags) -o $@ \
+ $(addprefix $(obj)/, $($(target-stem)-objs))
+
+$(plugin-multi): FORCE
+ $(call if_changed,plugin_ld_so_o)
+$(foreach m, $(notdir $(plugin-multi)), $(eval $(obj)/$m: $(addprefix $(obj)/, $($(m:%.so=%-objs)))))
+
+quiet_cmd_plugin_cxx_o_c = HOSTCXX $@
+ cmd_plugin_cxx_o_c = $(HOSTCXX) $(plugin_cxxflags) -c -o $@ $<
+
+$(plugin-objs): $(obj)/%.o: $(src)/%.c FORCE
+ $(call if_changed_dep,plugin_cxx_o_c)
+
+$(obj)/../../include/generated/gcc-plugins.h: $(plugin-single) $(plugin-multi) FORCE
+ $(call if_changed,touch)
+always-y += ../../include/generated/gcc-plugins.h
diff --git a/scripts/gcc-plugins/cyc_complexity_plugin.c b/scripts/gcc-plugins/cyc_complexity_plugin.c
deleted file mode 100644
index 1909ec617431..000000000000
--- a/scripts/gcc-plugins/cyc_complexity_plugin.c
+++ /dev/null
@@ -1,69 +0,0 @@
-/*
- * Copyright 2011-2016 by Emese Revfy <re.emese@gmail.com>
- * Licensed under the GPL v2, or (at your option) v3
- *
- * Homepage:
- * https://github.com/ephox-gcc-plugins/cyclomatic_complexity
- *
- * http://en.wikipedia.org/wiki/Cyclomatic_complexity
- * The complexity M is then defined as:
- * M = E - N + 2P
- * where
- *
- * E = the number of edges of the graph
- * N = the number of nodes of the graph
- * P = the number of connected components (exit nodes).
- *
- * Usage (4.5 - 5):
- * $ make clean; make run
- */
-
-#include "gcc-common.h"
-
-__visible int plugin_is_GPL_compatible;
-
-static struct plugin_info cyc_complexity_plugin_info = {
- .version = "20160225",
- .help = "Cyclomatic Complexity\n",
-};
-
-static unsigned int cyc_complexity_execute(void)
-{
- int complexity;
- expanded_location xloc;
-
- /* M = E - N + 2P */
- complexity = n_edges_for_fn(cfun) - n_basic_blocks_for_fn(cfun) + 2;
-
- xloc = expand_location(DECL_SOURCE_LOCATION(current_function_decl));
- fprintf(stderr, "Cyclomatic Complexity %d %s:%s\n", complexity,
- xloc.file, DECL_NAME_POINTER(current_function_decl));
-
- return 0;
-}
-
-#define PASS_NAME cyc_complexity
-
-#define NO_GATE
-#define TODO_FLAGS_FINISH TODO_dump_func
-
-#include "gcc-generate-gimple-pass.h"
-
-__visible int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version)
-{
- const char * const plugin_name = plugin_info->base_name;
-
- PASS_INFO(cyc_complexity, "ssa", 1, PASS_POS_INSERT_AFTER);
-
- if (!plugin_default_version_check(version, &gcc_version)) {
- error(G_("incompatible gcc/plugin versions"));
- return 1;
- }
-
- register_callback(plugin_name, PLUGIN_INFO, NULL,
- &cyc_complexity_plugin_info);
- register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL,
- &cyc_complexity_pass_info);
-
- return 0;
-}
diff --git a/scripts/gcc-plugins/gcc-common.h b/scripts/gcc-plugins/gcc-common.h
index 6948898b3cdf..8f1b3500f8e2 100644
--- a/scripts/gcc-plugins/gcc-common.h
+++ b/scripts/gcc-plugins/gcc-common.h
@@ -1,12 +1,9 @@
+/* SPDX-License-Identifier: GPL-2.0 */
#ifndef GCC_COMMON_H_INCLUDED
#define GCC_COMMON_H_INCLUDED
#include "bversion.h"
-#if BUILDING_GCC_VERSION >= 6000
#include "gcc-plugin.h"
-#else
-#include "plugin.h"
-#endif
#include "plugin-version.h"
#include "config.h"
#include "system.h"
@@ -26,25 +23,19 @@
#include "except.h"
#include "function.h"
#include "toplev.h"
-#if BUILDING_GCC_VERSION >= 5000
#include "expr.h"
-#endif
#include "basic-block.h"
#include "intl.h"
#include "ggc.h"
#include "timevar.h"
+#if BUILDING_GCC_VERSION < 10000
#include "params.h"
+#endif
-#if BUILDING_GCC_VERSION <= 4009
-#include "pointer-set.h"
-#else
#include "hash-map.h"
-#endif
-#if BUILDING_GCC_VERSION >= 7000
#include "memmodel.h"
-#endif
#include "emit-rtl.h"
#include "debug.h"
#include "target.h"
@@ -52,101 +43,54 @@
#include "cfgloop.h"
#include "cgraph.h"
#include "opts.h"
-
-#if BUILDING_GCC_VERSION == 4005
-#include <sys/mman.h>
-#endif
-
-#if BUILDING_GCC_VERSION >= 4007
#include "tree-pretty-print.h"
#include "gimple-pretty-print.h"
-#endif
-
-#if BUILDING_GCC_VERSION >= 4006
-/*
- * The c-family headers were moved into a subdirectory in GCC version
- * 4.7, but most plugin-building users of GCC 4.6 are using the Debian
- * or Ubuntu package, which has an out-of-tree patch to move this to the
- * same location as found in 4.7 and later:
- * https://sources.debian.net/src/gcc-4.6/4.6.3-14/debian/patches/pr45078.diff/
- */
#include "c-family/c-common.h"
-#else
-#include "c-common.h"
-#endif
-
-#if BUILDING_GCC_VERSION <= 4008
-#include "tree-flow.h"
-#else
#include "tree-cfgcleanup.h"
#include "tree-ssa-operands.h"
#include "tree-into-ssa.h"
-#endif
-
-#if BUILDING_GCC_VERSION >= 4008
#include "is-a.h"
-#endif
-
#include "diagnostic.h"
#include "tree-dump.h"
#include "tree-pass.h"
-#if BUILDING_GCC_VERSION >= 4009
#include "pass_manager.h"
-#endif
#include "predict.h"
#include "ipa-utils.h"
-
-#if BUILDING_GCC_VERSION >= 4009
+#include "stringpool.h"
#include "attribs.h"
#include "varasm.h"
#include "stor-layout.h"
#include "internal-fn.h"
+#include "gimple.h"
#include "gimple-expr.h"
+#include "gimple-iterator.h"
#include "gimple-fold.h"
#include "context.h"
#include "tree-ssa-alias.h"
#include "tree-ssa.h"
-#include "stringpool.h"
-#if BUILDING_GCC_VERSION >= 7000
#include "tree-vrp.h"
-#endif
#include "tree-ssanames.h"
#include "print-tree.h"
#include "tree-eh.h"
#include "stmt.h"
#include "gimplify.h"
-#endif
-
-#include "gimple.h"
-
-#if BUILDING_GCC_VERSION >= 4009
-#include "tree-ssa-operands.h"
#include "tree-phinodes.h"
#include "tree-cfg.h"
-#include "gimple-iterator.h"
#include "gimple-ssa.h"
#include "ssa-iterators.h"
-#endif
-#if BUILDING_GCC_VERSION >= 5000
#include "builtins.h"
-#endif
/* missing from basic_block.h... */
void debug_dominance_info(enum cdi_direction dir);
void debug_dominance_tree(enum cdi_direction dir, basic_block root);
-#if BUILDING_GCC_VERSION == 4006
-void debug_gimple_stmt(gimple);
-void debug_gimple_seq(gimple_seq);
-void print_gimple_seq(FILE *, gimple_seq, int, int);
-void print_gimple_stmt(FILE *, gimple, int, int);
-void print_gimple_expr(FILE *, gimple, int, int);
-void dump_gimple_stmt(pretty_printer *, gimple, int, int);
-#endif
-
+#ifndef __unused
#define __unused __attribute__((__unused__))
+#endif
+#ifndef __visible
#define __visible __attribute__((visibility("default")))
+#endif
#define DECL_NAME_POINTER(node) IDENTIFIER_POINTER(DECL_NAME(node))
#define DECL_NAME_LENGTH(node) IDENTIFIER_LENGTH(DECL_NAME(node))
@@ -171,508 +115,53 @@ static inline tree build_const_char_string(int len, const char *str)
return cstr;
}
-#define PASS_INFO(NAME, REF, ID, POS) \
-struct register_pass_info NAME##_pass_info = { \
- .pass = make_##NAME##_pass(), \
- .reference_pass_name = REF, \
- .ref_pass_instance_number = ID, \
- .pos_op = POS, \
-}
-
-#if BUILDING_GCC_VERSION == 4005
-#define FOR_EACH_LOCAL_DECL(FUN, I, D) \
- for (tree vars = (FUN)->local_decls, (I) = 0; \
- vars && ((D) = TREE_VALUE(vars)); \
- vars = TREE_CHAIN(vars), (I)++)
-#define DECL_CHAIN(NODE) (TREE_CHAIN(DECL_MINIMAL_CHECK(NODE)))
-#define FOR_EACH_VEC_ELT(T, V, I, P) \
- for (I = 0; VEC_iterate(T, (V), (I), (P)); ++(I))
-#define TODO_rebuild_cgraph_edges 0
-#define SCOPE_FILE_SCOPE_P(EXP) (!(EXP))
-
-#ifndef O_BINARY
-#define O_BINARY 0
-#endif
-
-typedef struct varpool_node *varpool_node_ptr;
-
-static inline bool gimple_call_builtin_p(gimple stmt, enum built_in_function code)
-{
- tree fndecl;
-
- if (!is_gimple_call(stmt))
- return false;
- fndecl = gimple_call_fndecl(stmt);
- if (!fndecl || DECL_BUILT_IN_CLASS(fndecl) != BUILT_IN_NORMAL)
- return false;
- return DECL_FUNCTION_CODE(fndecl) == code;
-}
-
-static inline bool is_simple_builtin(tree decl)
-{
- if (decl && DECL_BUILT_IN_CLASS(decl) != BUILT_IN_NORMAL)
- return false;
-
- switch (DECL_FUNCTION_CODE(decl)) {
- /* Builtins that expand to constants. */
- case BUILT_IN_CONSTANT_P:
- case BUILT_IN_EXPECT:
- case BUILT_IN_OBJECT_SIZE:
- case BUILT_IN_UNREACHABLE:
- /* Simple register moves or loads from stack. */
- case BUILT_IN_RETURN_ADDRESS:
- case BUILT_IN_EXTRACT_RETURN_ADDR:
- case BUILT_IN_FROB_RETURN_ADDR:
- case BUILT_IN_RETURN:
- case BUILT_IN_AGGREGATE_INCOMING_ADDRESS:
- case BUILT_IN_FRAME_ADDRESS:
- case BUILT_IN_VA_END:
- case BUILT_IN_STACK_SAVE:
- case BUILT_IN_STACK_RESTORE:
- /* Exception state returns or moves registers around. */
- case BUILT_IN_EH_FILTER:
- case BUILT_IN_EH_POINTER:
- case BUILT_IN_EH_COPY_VALUES:
- return true;
-
- default:
- return false;
- }
-}
-
-static inline void add_local_decl(struct function *fun, tree d)
+static inline void __add_type_attr(tree type, const char *attr, tree args)
{
- gcc_assert(TREE_CODE(d) == VAR_DECL);
- fun->local_decls = tree_cons(NULL_TREE, d, fun->local_decls);
-}
-#endif
+ tree oldattr;
-#if BUILDING_GCC_VERSION <= 4006
-#define ANY_RETURN_P(rtx) (GET_CODE(rtx) == RETURN)
-#define C_DECL_REGISTER(EXP) DECL_LANG_FLAG_4(EXP)
-#define EDGE_PRESERVE 0ULL
-#define HOST_WIDE_INT_PRINT_HEX_PURE "%" HOST_WIDE_INT_PRINT "x"
-#define flag_fat_lto_objects true
-
-#define get_random_seed(noinit) ({ \
- unsigned HOST_WIDE_INT seed; \
- sscanf(get_random_seed(noinit), "%" HOST_WIDE_INT_PRINT "x", &seed); \
- seed * seed; })
-
-#define int_const_binop(code, arg1, arg2) \
- int_const_binop((code), (arg1), (arg2), 0)
-
-static inline bool gimple_clobber_p(gimple s __unused)
-{
- return false;
-}
-
-static inline bool gimple_asm_clobbers_memory_p(const_gimple stmt)
-{
- unsigned i;
-
- for (i = 0; i < gimple_asm_nclobbers(stmt); i++) {
- tree op = gimple_asm_clobber_op(stmt, i);
-
- if (!strcmp(TREE_STRING_POINTER(TREE_VALUE(op)), "memory"))
- return true;
+ if (type == NULL_TREE)
+ return;
+ oldattr = lookup_attribute(attr, TYPE_ATTRIBUTES(type));
+ if (oldattr != NULL_TREE) {
+ gcc_assert(TREE_VALUE(oldattr) == args || TREE_VALUE(TREE_VALUE(oldattr)) == TREE_VALUE(args));
+ return;
}
- return false;
-}
-
-static inline tree builtin_decl_implicit(enum built_in_function fncode)
-{
- return implicit_built_in_decls[fncode];
-}
-
-static inline int ipa_reverse_postorder(struct cgraph_node **order)
-{
- return cgraph_postorder(order);
-}
-
-static inline struct cgraph_node *cgraph_create_node(tree decl)
-{
- return cgraph_node(decl);
-}
-
-static inline struct cgraph_node *cgraph_get_create_node(tree decl)
-{
- struct cgraph_node *node = cgraph_get_node(decl);
-
- return node ? node : cgraph_node(decl);
-}
-
-static inline bool cgraph_function_with_gimple_body_p(struct cgraph_node *node)
-{
- return node->analyzed && !node->thunk.thunk_p && !node->alias;
+ TYPE_ATTRIBUTES(type) = copy_list(TYPE_ATTRIBUTES(type));
+ TYPE_ATTRIBUTES(type) = tree_cons(get_identifier(attr), args, TYPE_ATTRIBUTES(type));
}
-static inline struct cgraph_node *cgraph_first_function_with_gimple_body(void)
+static inline void add_type_attr(tree type, const char *attr, tree args)
{
- struct cgraph_node *node;
+ tree main_variant = TYPE_MAIN_VARIANT(type);
- for (node = cgraph_nodes; node; node = node->next)
- if (cgraph_function_with_gimple_body_p(node))
- return node;
- return NULL;
-}
+ __add_type_attr(TYPE_CANONICAL(type), attr, args);
+ __add_type_attr(TYPE_CANONICAL(main_variant), attr, args);
+ __add_type_attr(main_variant, attr, args);
-static inline struct cgraph_node *cgraph_next_function_with_gimple_body(struct cgraph_node *node)
-{
- for (node = node->next; node; node = node->next)
- if (cgraph_function_with_gimple_body_p(node))
- return node;
- return NULL;
-}
+ for (type = TYPE_NEXT_VARIANT(main_variant); type; type = TYPE_NEXT_VARIANT(type)) {
+ if (!lookup_attribute(attr, TYPE_ATTRIBUTES(type)))
+ TYPE_ATTRIBUTES(type) = TYPE_ATTRIBUTES(main_variant);
-static inline bool cgraph_for_node_and_aliases(cgraph_node_ptr node, bool (*callback)(cgraph_node_ptr, void *), void *data, bool include_overwritable)
-{
- cgraph_node_ptr alias;
-
- if (callback(node, data))
- return true;
-
- for (alias = node->same_body; alias; alias = alias->next) {
- if (include_overwritable || cgraph_function_body_availability(alias) > AVAIL_OVERWRITABLE)
- if (cgraph_for_node_and_aliases(alias, callback, data, include_overwritable))
- return true;
+ __add_type_attr(TYPE_CANONICAL(type), attr, args);
}
-
- return false;
-}
-
-#define FOR_EACH_FUNCTION_WITH_GIMPLE_BODY(node) \
- for ((node) = cgraph_first_function_with_gimple_body(); (node); \
- (node) = cgraph_next_function_with_gimple_body(node))
-
-static inline void varpool_add_new_variable(tree decl)
-{
- varpool_finalize_decl(decl);
-}
-#endif
-
-#if BUILDING_GCC_VERSION <= 4007
-#define FOR_EACH_FUNCTION(node) \
- for (node = cgraph_nodes; node; node = node->next)
-#define FOR_EACH_VARIABLE(node) \
- for (node = varpool_nodes; node; node = node->next)
-#define PROP_loops 0
-#define NODE_SYMBOL(node) (node)
-#define NODE_DECL(node) (node)->decl
-#define INSN_LOCATION(INSN) RTL_LOCATION(INSN)
-#define vNULL NULL
-
-static inline int bb_loop_depth(const_basic_block bb)
-{
- return bb->loop_father ? loop_depth(bb->loop_father) : 0;
-}
-
-static inline bool gimple_store_p(gimple gs)
-{
- tree lhs = gimple_get_lhs(gs);
-
- return lhs && !is_gimple_reg(lhs);
-}
-
-static inline void gimple_init_singleton(gimple g __unused)
-{
-}
-#endif
-
-#if BUILDING_GCC_VERSION == 4007 || BUILDING_GCC_VERSION == 4008
-static inline struct cgraph_node *cgraph_alias_target(struct cgraph_node *n)
-{
- return cgraph_alias_aliased_node(n);
-}
-#endif
-
-#if BUILDING_GCC_VERSION >= 4007 && BUILDING_GCC_VERSION <= 4009
-#define cgraph_create_edge(caller, callee, call_stmt, count, freq, nest) \
- cgraph_create_edge((caller), (callee), (call_stmt), (count), (freq))
-#define cgraph_create_edge_including_clones(caller, callee, old_call_stmt, call_stmt, count, freq, nest, reason) \
- cgraph_create_edge_including_clones((caller), (callee), (old_call_stmt), (call_stmt), (count), (freq), (reason))
-#endif
-
-#if BUILDING_GCC_VERSION <= 4008
-#define ENTRY_BLOCK_PTR_FOR_FN(FN) ENTRY_BLOCK_PTR_FOR_FUNCTION(FN)
-#define EXIT_BLOCK_PTR_FOR_FN(FN) EXIT_BLOCK_PTR_FOR_FUNCTION(FN)
-#define basic_block_info_for_fn(FN) ((FN)->cfg->x_basic_block_info)
-#define n_basic_blocks_for_fn(FN) ((FN)->cfg->x_n_basic_blocks)
-#define n_edges_for_fn(FN) ((FN)->cfg->x_n_edges)
-#define last_basic_block_for_fn(FN) ((FN)->cfg->x_last_basic_block)
-#define label_to_block_map_for_fn(FN) ((FN)->cfg->x_label_to_block_map)
-#define profile_status_for_fn(FN) ((FN)->cfg->x_profile_status)
-#define BASIC_BLOCK_FOR_FN(FN, N) BASIC_BLOCK_FOR_FUNCTION((FN), (N))
-#define NODE_IMPLICIT_ALIAS(node) (node)->same_body_alias
-#define VAR_P(NODE) (TREE_CODE(NODE) == VAR_DECL)
-
-static inline bool tree_fits_shwi_p(const_tree t)
-{
- if (t == NULL_TREE || TREE_CODE(t) != INTEGER_CST)
- return false;
-
- if (TREE_INT_CST_HIGH(t) == 0 && (HOST_WIDE_INT)TREE_INT_CST_LOW(t) >= 0)
- return true;
-
- if (TREE_INT_CST_HIGH(t) == -1 && (HOST_WIDE_INT)TREE_INT_CST_LOW(t) < 0 && !TYPE_UNSIGNED(TREE_TYPE(t)))
- return true;
-
- return false;
-}
-
-static inline bool tree_fits_uhwi_p(const_tree t)
-{
- if (t == NULL_TREE || TREE_CODE(t) != INTEGER_CST)
- return false;
-
- return TREE_INT_CST_HIGH(t) == 0;
-}
-
-static inline HOST_WIDE_INT tree_to_shwi(const_tree t)
-{
- gcc_assert(tree_fits_shwi_p(t));
- return TREE_INT_CST_LOW(t);
-}
-
-static inline unsigned HOST_WIDE_INT tree_to_uhwi(const_tree t)
-{
- gcc_assert(tree_fits_uhwi_p(t));
- return TREE_INT_CST_LOW(t);
-}
-
-static inline const char *get_tree_code_name(enum tree_code code)
-{
- gcc_assert(code < MAX_TREE_CODES);
- return tree_code_name[code];
-}
-
-#define ipa_remove_stmt_references(cnode, stmt)
-
-typedef union gimple_statement_d gasm;
-typedef union gimple_statement_d gassign;
-typedef union gimple_statement_d gcall;
-typedef union gimple_statement_d gcond;
-typedef union gimple_statement_d gdebug;
-typedef union gimple_statement_d ggoto;
-typedef union gimple_statement_d gphi;
-typedef union gimple_statement_d greturn;
-
-static inline gasm *as_a_gasm(gimple stmt)
-{
- return stmt;
-}
-
-static inline const gasm *as_a_const_gasm(const_gimple stmt)
-{
- return stmt;
-}
-
-static inline gassign *as_a_gassign(gimple stmt)
-{
- return stmt;
}
-static inline const gassign *as_a_const_gassign(const_gimple stmt)
-{
- return stmt;
-}
-
-static inline gcall *as_a_gcall(gimple stmt)
-{
- return stmt;
-}
-
-static inline const gcall *as_a_const_gcall(const_gimple stmt)
-{
- return stmt;
-}
-
-static inline gcond *as_a_gcond(gimple stmt)
-{
- return stmt;
-}
-
-static inline const gcond *as_a_const_gcond(const_gimple stmt)
-{
- return stmt;
-}
-
-static inline gdebug *as_a_gdebug(gimple stmt)
-{
- return stmt;
-}
-
-static inline const gdebug *as_a_const_gdebug(const_gimple stmt)
-{
- return stmt;
-}
-
-static inline ggoto *as_a_ggoto(gimple stmt)
-{
- return stmt;
-}
-
-static inline const ggoto *as_a_const_ggoto(const_gimple stmt)
-{
- return stmt;
-}
-
-static inline gphi *as_a_gphi(gimple stmt)
-{
- return stmt;
-}
-
-static inline const gphi *as_a_const_gphi(const_gimple stmt)
-{
- return stmt;
-}
-
-static inline greturn *as_a_greturn(gimple stmt)
-{
- return stmt;
-}
-
-static inline const greturn *as_a_const_greturn(const_gimple stmt)
-{
- return stmt;
+#define PASS_INFO(NAME, REF, ID, POS) \
+struct register_pass_info NAME##_pass_info = { \
+ .pass = make_##NAME##_pass(), \
+ .reference_pass_name = REF, \
+ .ref_pass_instance_number = ID, \
+ .pos_op = POS, \
}
-#endif
-#if BUILDING_GCC_VERSION == 4008
-#define NODE_SYMBOL(node) (&(node)->symbol)
-#define NODE_DECL(node) (node)->symbol.decl
-#endif
-
-#if BUILDING_GCC_VERSION >= 4008
#define add_referenced_var(var)
#define mark_sym_for_renaming(var)
#define varpool_mark_needed_node(node)
#define create_var_ann(var)
#define TODO_dump_func 0
#define TODO_dump_cgraph 0
-#endif
-
-#if BUILDING_GCC_VERSION <= 4009
-#define TODO_verify_il 0
-#define AVAIL_INTERPOSABLE AVAIL_OVERWRITABLE
-
-#define section_name_prefix LTO_SECTION_NAME_PREFIX
-#define fatal_error(loc, gmsgid, ...) fatal_error((gmsgid), __VA_ARGS__)
-
-rtx emit_move_insn(rtx x, rtx y);
-
-typedef struct rtx_def rtx_insn;
-
-static inline const char *get_decl_section_name(const_tree decl)
-{
- if (DECL_SECTION_NAME(decl) == NULL_TREE)
- return NULL;
-
- return TREE_STRING_POINTER(DECL_SECTION_NAME(decl));
-}
-
-static inline void set_decl_section_name(tree node, const char *value)
-{
- if (value)
- DECL_SECTION_NAME(node) = build_string(strlen(value) + 1, value);
- else
- DECL_SECTION_NAME(node) = NULL;
-}
-#endif
-
-#if BUILDING_GCC_VERSION == 4009
-typedef struct gimple_statement_asm gasm;
-typedef struct gimple_statement_base gassign;
-typedef struct gimple_statement_call gcall;
-typedef struct gimple_statement_base gcond;
-typedef struct gimple_statement_base gdebug;
-typedef struct gimple_statement_base ggoto;
-typedef struct gimple_statement_phi gphi;
-typedef struct gimple_statement_base greturn;
-
-static inline gasm *as_a_gasm(gimple stmt)
-{
- return as_a<gasm>(stmt);
-}
-
-static inline const gasm *as_a_const_gasm(const_gimple stmt)
-{
- return as_a<const gasm>(stmt);
-}
-
-static inline gassign *as_a_gassign(gimple stmt)
-{
- return stmt;
-}
-
-static inline const gassign *as_a_const_gassign(const_gimple stmt)
-{
- return stmt;
-}
-
-static inline gcall *as_a_gcall(gimple stmt)
-{
- return as_a<gcall>(stmt);
-}
-
-static inline const gcall *as_a_const_gcall(const_gimple stmt)
-{
- return as_a<const gcall>(stmt);
-}
-static inline gcond *as_a_gcond(gimple stmt)
-{
- return stmt;
-}
-
-static inline const gcond *as_a_const_gcond(const_gimple stmt)
-{
- return stmt;
-}
-
-static inline gdebug *as_a_gdebug(gimple stmt)
-{
- return stmt;
-}
-
-static inline const gdebug *as_a_const_gdebug(const_gimple stmt)
-{
- return stmt;
-}
-
-static inline ggoto *as_a_ggoto(gimple stmt)
-{
- return stmt;
-}
-
-static inline const ggoto *as_a_const_ggoto(const_gimple stmt)
-{
- return stmt;
-}
-
-static inline gphi *as_a_gphi(gimple stmt)
-{
- return as_a<gphi>(stmt);
-}
-
-static inline const gphi *as_a_const_gphi(const_gimple stmt)
-{
- return as_a<const gphi>(stmt);
-}
-
-static inline greturn *as_a_greturn(gimple stmt)
-{
- return stmt;
-}
-
-static inline const greturn *as_a_const_greturn(const_gimple stmt)
-{
- return stmt;
-}
-#endif
-
-#if BUILDING_GCC_VERSION >= 4009
#define TODO_ggc_collect 0
#define NODE_SYMBOL(node) (node)
#define NODE_DECL(node) (node)->decl
@@ -683,23 +172,18 @@ static inline opt_pass *get_pass_for_id(int id)
{
return g->get_passes()->get_pass_for_id(id);
}
-#endif
-#if BUILDING_GCC_VERSION >= 5000 && BUILDING_GCC_VERSION < 6000
-/* gimple related */
-template <>
-template <>
-inline bool is_a_helper<const gassign *>::test(const_gimple gs)
-{
- return gs->code == GIMPLE_ASSIGN;
-}
-#endif
-
-#if BUILDING_GCC_VERSION >= 5000
+#if BUILDING_GCC_VERSION < 16000
#define TODO_verify_ssa TODO_verify_il
#define TODO_verify_flow TODO_verify_il
#define TODO_verify_stmts TODO_verify_il
#define TODO_verify_rtl_sharing TODO_verify_il
+#else
+#define TODO_verify_ssa 0
+#define TODO_verify_flow 0
+#define TODO_verify_stmts 0
+#define TODO_verify_rtl_sharing 0
+#endif
#define INSN_DELETED_P(insn) (insn)->deleted()
@@ -718,10 +202,13 @@ static inline const char *get_decl_section_name(const_tree decl)
#define varpool_get_node(decl) varpool_node::get(decl)
#define dump_varpool_node(file, node) (node)->dump(file)
-#define cgraph_create_edge(caller, callee, call_stmt, count, freq, nest) \
- (caller)->create_edge((callee), (call_stmt), (count), (freq))
-#define cgraph_create_edge_including_clones(caller, callee, old_call_stmt, call_stmt, count, freq, nest, reason) \
- (caller)->create_edge_including_clones((callee), (old_call_stmt), (call_stmt), (count), (freq), (reason))
+#define cgraph_create_edge(caller, callee, call_stmt, count, freq) \
+ (caller)->create_edge((callee), (call_stmt), (count))
+
+#define cgraph_create_edge_including_clones(caller, callee, \
+ old_call_stmt, call_stmt, count, freq, reason) \
+ (caller)->create_edge_including_clones((callee), \
+ (old_call_stmt), (call_stmt), (count), (reason))
typedef struct cgraph_node *cgraph_node_ptr;
typedef struct cgraph_edge *cgraph_edge_p;
@@ -817,14 +304,12 @@ static inline void cgraph_call_edge_duplication_hooks(cgraph_edge *cs1, cgraph_e
symtab->call_edge_duplication_hooks(cs1, cs2);
}
-#if BUILDING_GCC_VERSION >= 6000
typedef gimple *gimple_ptr;
typedef const gimple *const_gimple_ptr;
#define gimple gimple_ptr
#define const_gimple const_gimple_ptr
#undef CONST_CAST_GIMPLE
#define CONST_CAST_GIMPLE(X) CONST_CAST(gimple, (X))
-#endif
/* gimple related */
static inline gimple gimple_build_assign_with_ops(enum tree_code subcode, tree lhs, tree op1, tree op2 MEM_STAT_DECL)
@@ -832,6 +317,7 @@ static inline gimple gimple_build_assign_with_ops(enum tree_code subcode, tree l
return gimple_build_assign(lhs, subcode, op1, op2 PASS_MEM_STAT);
}
+#if BUILDING_GCC_VERSION < 10000
template <>
template <>
inline bool is_a_helper<const ggoto *>::test(const_gimple gs)
@@ -845,6 +331,7 @@ inline bool is_a_helper<const greturn *>::test(const_gimple gs)
{
return gs->code == GIMPLE_RETURN;
}
+#endif
static inline gasm *as_a_gasm(gimple stmt)
{
@@ -921,17 +408,8 @@ static inline void ipa_remove_stmt_references(symtab_node *referring_node, gimpl
{
referring_node->remove_stmt_references(stmt);
}
-#endif
-#if BUILDING_GCC_VERSION < 6000
-#define get_inner_reference(exp, pbitsize, pbitpos, poffset, pmode, punsignedp, preversep, pvolatilep, keep_aligning) \
- get_inner_reference(exp, pbitsize, pbitpos, poffset, pmode, punsignedp, pvolatilep, keep_aligning)
-#define gen_rtx_set(ARG0, ARG1) gen_rtx_SET(VOIDmode, (ARG0), (ARG1))
-#endif
-
-#if BUILDING_GCC_VERSION >= 6000
#define gen_rtx_set(ARG0, ARG1) gen_rtx_SET((ARG0), (ARG1))
-#endif
#ifdef __cplusplus
static inline void debug_tree(const_tree t)
@@ -948,14 +426,11 @@ static inline void debug_gimple_stmt(const_gimple s)
#define debug_gimple_stmt(s) debug_gimple_stmt(CONST_CAST_GIMPLE(s))
#endif
-#if BUILDING_GCC_VERSION >= 7000
#define get_inner_reference(exp, pbitsize, pbitpos, poffset, pmode, punsignedp, preversep, pvolatilep, keep_aligning) \
get_inner_reference(exp, pbitsize, pbitpos, poffset, pmode, punsignedp, preversep, pvolatilep)
-#endif
-#if BUILDING_GCC_VERSION < 7000
-#define SET_DECL_ALIGN(decl, align) DECL_ALIGN(decl) = (align)
-#define SET_DECL_MODE(decl, mode) DECL_MODE(decl) = (mode)
+#if BUILDING_GCC_VERSION >= 14000
+#define last_stmt(x) last_nondebug_stmt(x)
#endif
#endif
diff --git a/scripts/gcc-plugins/gcc-generate-gimple-pass.h b/scripts/gcc-plugins/gcc-generate-gimple-pass.h
index 526c3c79b68e..503c07496396 100644
--- a/scripts/gcc-plugins/gcc-generate-gimple-pass.h
+++ b/scripts/gcc-plugins/gcc-generate-gimple-pass.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Generator for GIMPLE pass related boilerplate code/data
*
@@ -72,62 +73,31 @@
#define TODO_FLAGS_FINISH 0
#endif
-#if BUILDING_GCC_VERSION >= 4009
namespace {
static const pass_data _PASS_NAME_PASS_DATA = {
-#else
-static struct gimple_opt_pass _PASS_NAME_PASS = {
- .pass = {
-#endif
.type = GIMPLE_PASS,
.name = _PASS_NAME_NAME,
-#if BUILDING_GCC_VERSION >= 4008
.optinfo_flags = OPTGROUP_NONE,
-#endif
-#if BUILDING_GCC_VERSION >= 5000
-#elif BUILDING_GCC_VERSION == 4009
- .has_gate = _HAS_GATE,
- .has_execute = _HAS_EXECUTE,
-#else
- .gate = _GATE,
- .execute = _EXECUTE,
- .sub = NULL,
- .next = NULL,
- .static_pass_number = 0,
-#endif
.tv_id = TV_NONE,
.properties_required = PROPERTIES_REQUIRED,
.properties_provided = PROPERTIES_PROVIDED,
.properties_destroyed = PROPERTIES_DESTROYED,
.todo_flags_start = TODO_FLAGS_START,
.todo_flags_finish = TODO_FLAGS_FINISH,
-#if BUILDING_GCC_VERSION < 4009
- }
-#endif
};
-#if BUILDING_GCC_VERSION >= 4009
class _PASS_NAME_PASS : public gimple_opt_pass {
public:
_PASS_NAME_PASS() : gimple_opt_pass(_PASS_NAME_PASS_DATA, g) {}
#ifndef NO_GATE
-#if BUILDING_GCC_VERSION >= 5000
virtual bool gate(function *) { return _GATE(); }
-#else
- virtual bool gate(void) { return _GATE(); }
-#endif
#endif
virtual opt_pass * clone () { return new _PASS_NAME_PASS(); }
#ifndef NO_EXECUTE
-#if BUILDING_GCC_VERSION >= 5000
virtual unsigned int execute(function *) { return _EXECUTE(); }
-#else
- virtual unsigned int execute(void) { return _EXECUTE(); }
-#endif
-#endif
};
}
diff --git a/scripts/gcc-plugins/gcc-generate-ipa-pass.h b/scripts/gcc-plugins/gcc-generate-ipa-pass.h
index 9bd926e072f0..1e7f064e8f6e 100644
--- a/scripts/gcc-plugins/gcc-generate-ipa-pass.h
+++ b/scripts/gcc-plugins/gcc-generate-ipa-pass.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Generator for IPA pass related boilerplate code/data
*
@@ -140,52 +141,19 @@
#define FUNCTION_TRANSFORM_TODO_FLAGS_START 0
#endif
-#if BUILDING_GCC_VERSION >= 4009
namespace {
static const pass_data _PASS_NAME_PASS_DATA = {
-#else
-static struct ipa_opt_pass_d _PASS_NAME_PASS = {
- .pass = {
-#endif
.type = IPA_PASS,
.name = _PASS_NAME_NAME,
-#if BUILDING_GCC_VERSION >= 4008
.optinfo_flags = OPTGROUP_NONE,
-#endif
-#if BUILDING_GCC_VERSION >= 5000
-#elif BUILDING_GCC_VERSION == 4009
- .has_gate = _HAS_GATE,
- .has_execute = _HAS_EXECUTE,
-#else
- .gate = _GATE,
- .execute = _EXECUTE,
- .sub = NULL,
- .next = NULL,
- .static_pass_number = 0,
-#endif
.tv_id = TV_NONE,
.properties_required = PROPERTIES_REQUIRED,
.properties_provided = PROPERTIES_PROVIDED,
.properties_destroyed = PROPERTIES_DESTROYED,
.todo_flags_start = TODO_FLAGS_START,
.todo_flags_finish = TODO_FLAGS_FINISH,
-#if BUILDING_GCC_VERSION < 4009
- },
- .generate_summary = _GENERATE_SUMMARY,
- .write_summary = _WRITE_SUMMARY,
- .read_summary = _READ_SUMMARY,
-#if BUILDING_GCC_VERSION >= 4006
- .write_optimization_summary = _WRITE_OPTIMIZATION_SUMMARY,
- .read_optimization_summary = _READ_OPTIMIZATION_SUMMARY,
-#endif
- .stmt_fixup = _STMT_FIXUP,
- .function_transform_todo_flags_start = FUNCTION_TRANSFORM_TODO_FLAGS_START,
- .function_transform = _FUNCTION_TRANSFORM,
- .variable_transform = _VARIABLE_TRANSFORM,
-#endif
};
-#if BUILDING_GCC_VERSION >= 4009
class _PASS_NAME_PASS : public ipa_opt_pass_d {
public:
_PASS_NAME_PASS() : ipa_opt_pass_d(_PASS_NAME_PASS_DATA,
@@ -201,21 +169,12 @@ public:
_VARIABLE_TRANSFORM) {}
#ifndef NO_GATE
-#if BUILDING_GCC_VERSION >= 5000
virtual bool gate(function *) { return _GATE(); }
-#else
- virtual bool gate(void) { return _GATE(); }
-#endif
-#endif
virtual opt_pass *clone() { return new _PASS_NAME_PASS(); }
#ifndef NO_EXECUTE
-#if BUILDING_GCC_VERSION >= 5000
virtual unsigned int execute(function *) { return _EXECUTE(); }
-#else
- virtual unsigned int execute(void) { return _EXECUTE(); }
-#endif
#endif
};
}
diff --git a/scripts/gcc-plugins/gcc-generate-rtl-pass.h b/scripts/gcc-plugins/gcc-generate-rtl-pass.h
index 1dc67a5aeadf..7cd46e8d5049 100644
--- a/scripts/gcc-plugins/gcc-generate-rtl-pass.h
+++ b/scripts/gcc-plugins/gcc-generate-rtl-pass.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Generator for RTL pass related boilerplate code/data
*
@@ -72,61 +73,31 @@
#define TODO_FLAGS_FINISH 0
#endif
-#if BUILDING_GCC_VERSION >= 4009
namespace {
static const pass_data _PASS_NAME_PASS_DATA = {
-#else
-static struct rtl_opt_pass _PASS_NAME_PASS = {
- .pass = {
-#endif
.type = RTL_PASS,
.name = _PASS_NAME_NAME,
-#if BUILDING_GCC_VERSION >= 4008
.optinfo_flags = OPTGROUP_NONE,
-#endif
-#if BUILDING_GCC_VERSION >= 5000
-#elif BUILDING_GCC_VERSION == 4009
- .has_gate = _HAS_GATE,
- .has_execute = _HAS_EXECUTE,
-#else
- .gate = _GATE,
- .execute = _EXECUTE,
- .sub = NULL,
- .next = NULL,
- .static_pass_number = 0,
-#endif
.tv_id = TV_NONE,
.properties_required = PROPERTIES_REQUIRED,
.properties_provided = PROPERTIES_PROVIDED,
.properties_destroyed = PROPERTIES_DESTROYED,
.todo_flags_start = TODO_FLAGS_START,
.todo_flags_finish = TODO_FLAGS_FINISH,
-#if BUILDING_GCC_VERSION < 4009
- }
-#endif
};
-#if BUILDING_GCC_VERSION >= 4009
class _PASS_NAME_PASS : public rtl_opt_pass {
public:
_PASS_NAME_PASS() : rtl_opt_pass(_PASS_NAME_PASS_DATA, g) {}
#ifndef NO_GATE
-#if BUILDING_GCC_VERSION >= 5000
virtual bool gate(function *) { return _GATE(); }
-#else
- virtual bool gate(void) { return _GATE(); }
-#endif
#endif
virtual opt_pass *clone() { return new _PASS_NAME_PASS(); }
#ifndef NO_EXECUTE
-#if BUILDING_GCC_VERSION >= 5000
virtual unsigned int execute(function *) { return _EXECUTE(); }
-#else
- virtual unsigned int execute(void) { return _EXECUTE(); }
-#endif
#endif
};
}
@@ -135,12 +106,6 @@ opt_pass *_MAKE_PASS_NAME_PASS(void)
{
return new _PASS_NAME_PASS();
}
-#else
-struct opt_pass *_MAKE_PASS_NAME_PASS(void)
-{
- return &_PASS_NAME_PASS.pass;
-}
-#endif
/* clean up user provided defines */
#undef PASS_NAME
diff --git a/scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h b/scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h
index a27e2b36afaa..33093ccc947a 100644
--- a/scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h
+++ b/scripts/gcc-plugins/gcc-generate-simple_ipa-pass.h
@@ -1,3 +1,4 @@
+/* SPDX-License-Identifier: GPL-2.0 */
/*
* Generator for SIMPLE_IPA pass related boilerplate code/data
*
@@ -72,61 +73,31 @@
#define TODO_FLAGS_FINISH 0
#endif
-#if BUILDING_GCC_VERSION >= 4009
namespace {
static const pass_data _PASS_NAME_PASS_DATA = {
-#else
-static struct simple_ipa_opt_pass _PASS_NAME_PASS = {
- .pass = {
-#endif
.type = SIMPLE_IPA_PASS,
.name = _PASS_NAME_NAME,
-#if BUILDING_GCC_VERSION >= 4008
.optinfo_flags = OPTGROUP_NONE,
-#endif
-#if BUILDING_GCC_VERSION >= 5000
-#elif BUILDING_GCC_VERSION == 4009
- .has_gate = _HAS_GATE,
- .has_execute = _HAS_EXECUTE,
-#else
- .gate = _GATE,
- .execute = _EXECUTE,
- .sub = NULL,
- .next = NULL,
- .static_pass_number = 0,
-#endif
.tv_id = TV_NONE,
.properties_required = PROPERTIES_REQUIRED,
.properties_provided = PROPERTIES_PROVIDED,
.properties_destroyed = PROPERTIES_DESTROYED,
.todo_flags_start = TODO_FLAGS_START,
.todo_flags_finish = TODO_FLAGS_FINISH,
-#if BUILDING_GCC_VERSION < 4009
- }
-#endif
};
-#if BUILDING_GCC_VERSION >= 4009
class _PASS_NAME_PASS : public simple_ipa_opt_pass {
public:
_PASS_NAME_PASS() : simple_ipa_opt_pass(_PASS_NAME_PASS_DATA, g) {}
#ifndef NO_GATE
-#if BUILDING_GCC_VERSION >= 5000
virtual bool gate(function *) { return _GATE(); }
-#else
- virtual bool gate(void) { return _GATE(); }
-#endif
#endif
virtual opt_pass *clone() { return new _PASS_NAME_PASS(); }
#ifndef NO_EXECUTE
-#if BUILDING_GCC_VERSION >= 5000
virtual unsigned int execute(function *) { return _EXECUTE(); }
-#else
- virtual unsigned int execute(void) { return _EXECUTE(); }
-#endif
#endif
};
}
@@ -135,12 +106,6 @@ opt_pass *_MAKE_PASS_NAME_PASS(void)
{
return new _PASS_NAME_PASS();
}
-#else
-struct opt_pass *_MAKE_PASS_NAME_PASS(void)
-{
- return &_PASS_NAME_PASS.pass;
-}
-#endif
/* clean up user provided defines */
#undef PASS_NAME
diff --git a/scripts/gcc-plugins/gen-random-seed.sh b/scripts/gcc-plugins/gen-random-seed.sh
deleted file mode 100644
index 7514850f4815..000000000000
--- a/scripts/gcc-plugins/gen-random-seed.sh
+++ /dev/null
@@ -1,8 +0,0 @@
-#!/bin/sh
-
-if [ ! -f "$1" ]; then
- SEED=`od -A n -t x8 -N 32 /dev/urandom | tr -d ' \n'`
- echo "const char *randstruct_seed = \"$SEED\";" > "$1"
- HASH=`echo -n "$SEED" | sha256sum | cut -d" " -f1 | tr -d ' \n'`
- echo "#define RANDSTRUCT_HASHED_SEED \"$HASH\"" > "$2"
-fi
diff --git a/scripts/gcc-plugins/latent_entropy_plugin.c b/scripts/gcc-plugins/latent_entropy_plugin.c
index 65264960910d..ff0b192be91f 100644
--- a/scripts/gcc-plugins/latent_entropy_plugin.c
+++ b/scripts/gcc-plugins/latent_entropy_plugin.c
@@ -1,7 +1,7 @@
+// SPDX-License-Identifier: GPL-2.0-only
/*
* Copyright 2012-2016 by the PaX Team <pageexec@freemail.hu>
* Copyright 2016 by Emese Revfy <re.emese@gmail.com>
- * Licensed under the GPL v2
*
* Note: the choice of the license means that the compilation process is
* NOT 'eligible' as defined by gcc's library exception to the GPL v3,
@@ -17,7 +17,7 @@
* if (argc <= 1)
* printf("%s: no command arguments :(\n", *argv);
* else
- * printf("%s: %d command arguments!\n", *argv, args - 1);
+ * printf("%s: %d command arguments!\n", *argv, argc - 1);
* }
*
* after:
@@ -47,7 +47,7 @@
* // perturb_local_entropy()
* } else {
* local_entropy ^= 3896280633962944730;
- * printf("%s: %d command arguments!\n", *argv, args - 1);
+ * printf("%s: %d command arguments!\n", *argv, argc - 1);
* }
*
* // latent_entropy_execute() 4.
@@ -82,29 +82,35 @@ __visible int plugin_is_GPL_compatible;
static GTY(()) tree latent_entropy_decl;
static struct plugin_info latent_entropy_plugin_info = {
- .version = "201606141920vanilla",
+ .version = PLUGIN_VERSION,
.help = "disable\tturn off latent entropy instrumentation\n",
};
-static unsigned HOST_WIDE_INT seed;
-/*
- * get_random_seed() (this is a GCC function) generates the seed.
- * This is a simple random generator without any cryptographic security because
- * the entropy doesn't come from here.
- */
+static unsigned HOST_WIDE_INT deterministic_seed;
+static unsigned HOST_WIDE_INT rnd_buf[32];
+static size_t rnd_idx = ARRAY_SIZE(rnd_buf);
+static int urandom_fd = -1;
+
static unsigned HOST_WIDE_INT get_random_const(void)
{
- unsigned int i;
- unsigned HOST_WIDE_INT ret = 0;
-
- for (i = 0; i < 8 * sizeof(ret); i++) {
- ret = (ret << 1) | (seed & 1);
- seed >>= 1;
- if (ret & 1)
- seed ^= 0xD800000000000000ULL;
+ if (deterministic_seed) {
+ unsigned HOST_WIDE_INT w = deterministic_seed;
+ w ^= w << 13;
+ w ^= w >> 7;
+ w ^= w << 17;
+ deterministic_seed = w;
+ return deterministic_seed;
}
- return ret;
+ if (urandom_fd < 0) {
+ urandom_fd = open("/dev/urandom", O_RDONLY);
+ gcc_assert(urandom_fd >= 0);
+ }
+ if (rnd_idx >= ARRAY_SIZE(rnd_buf)) {
+ gcc_assert(read(urandom_fd, rnd_buf, sizeof(rnd_buf)) == sizeof(rnd_buf));
+ rnd_idx = 0;
+ }
+ return rnd_buf[rnd_idx++];
}
static tree tree_get_random_const(tree type)
@@ -125,11 +131,7 @@ static tree handle_latent_entropy_attribute(tree *node, tree name,
bool *no_add_attrs)
{
tree type;
-#if BUILDING_GCC_VERSION <= 4007
- VEC(constructor_elt, gc) *vals;
-#else
vec<constructor_elt, va_gc> *vals;
-#endif
switch (TREE_CODE(*node)) {
default:
@@ -181,11 +183,7 @@ static tree handle_latent_entropy_attribute(tree *node, tree name,
if (fld)
break;
-#if BUILDING_GCC_VERSION <= 4007
- vals = VEC_alloc(constructor_elt, gc, nelt);
-#else
vec_alloc(vals, nelt);
-#endif
for (fld = lst; fld; fld = TREE_CHAIN(fld)) {
tree random_const, fld_t = TREE_TYPE(fld);
@@ -225,11 +223,7 @@ static tree handle_latent_entropy_attribute(tree *node, tree name,
elt_size_int = TREE_INT_CST_LOW(elt_size);
nelt = array_size_int / elt_size_int;
-#if BUILDING_GCC_VERSION <= 4007
- vals = VEC_alloc(constructor_elt, gc, nelt);
-#else
vec_alloc(vals, nelt);
-#endif
for (i = 0; i < nelt; i++) {
tree cst = size_int(i);
@@ -255,21 +249,14 @@ static tree handle_latent_entropy_attribute(tree *node, tree name,
return NULL_TREE;
}
-static struct attribute_spec latent_entropy_attr = {
- .name = "latent_entropy",
- .min_length = 0,
- .max_length = 0,
- .decl_required = true,
- .type_required = false,
- .function_type_required = false,
- .handler = handle_latent_entropy_attribute,
-#if BUILDING_GCC_VERSION >= 4007
- .affects_type_identity = false
-#endif
-};
+static struct attribute_spec latent_entropy_attr = { };
static void register_attributes(void *event_data __unused, void *data __unused)
{
+ latent_entropy_attr.name = "latent_entropy";
+ latent_entropy_attr.decl_required = true;
+ latent_entropy_attr.handler = handle_latent_entropy_attribute;
+
register_attribute(&latent_entropy_attr);
}
@@ -543,7 +530,7 @@ static unsigned int latent_entropy_execute(void)
while (bb != EXIT_BLOCK_PTR_FOR_FN(cfun)) {
perturb_local_entropy(bb, local_entropy);
bb = bb->next_bb;
- };
+ }
/* 4. mix local entropy into the global entropy variable */
perturb_latent_entropy(local_entropy);
@@ -556,8 +543,6 @@ static void latent_entropy_start_unit(void *gcc_data __unused,
tree type, id;
int quals;
- seed = get_random_seed(false);
-
if (in_lto_p)
return;
@@ -592,6 +577,12 @@ __visible int plugin_init(struct plugin_name_args *plugin_info,
const struct plugin_argument * const argv = plugin_info->argv;
int i;
+ /*
+ * Call get_random_seed() with noinit=true, so that this returns
+ * 0 in the case where no seed has been passed via -frandom-seed.
+ */
+ deterministic_seed = get_random_seed(true);
+
static const struct ggc_root_tab gt_ggc_r_gt_latent_entropy[] = {
{
.base = &latent_entropy_decl,
diff --git a/scripts/gcc-plugins/randomize_layout_plugin.c b/scripts/gcc-plugins/randomize_layout_plugin.c
index cdaac8c66734..ff65a4f87f24 100644
--- a/scripts/gcc-plugins/randomize_layout_plugin.c
+++ b/scripts/gcc-plugins/randomize_layout_plugin.c
@@ -19,10 +19,6 @@
#include "gcc-common.h"
#include "randomize_layout_seed.h"
-#if BUILDING_GCC_MAJOR < 4 || (BUILDING_GCC_MAJOR == 4 && BUILDING_GCC_MINOR < 7)
-#error "The RANDSTRUCT plugin requires GCC 4.7 or newer."
-#endif
-
#define ORIG_TYPE_NAME(node) \
(TYPE_NAME(TYPE_MAIN_VARIANT(node)) != NULL_TREE ? ((const unsigned char *)IDENTIFIER_POINTER(TYPE_NAME(TYPE_MAIN_VARIANT(node)))) : (const unsigned char *)"anonymous")
@@ -34,29 +30,11 @@ __visible int plugin_is_GPL_compatible;
static int performance_mode;
static struct plugin_info randomize_layout_plugin_info = {
- .version = "201402201816vanilla",
+ .version = PLUGIN_VERSION,
.help = "disable\t\t\tdo not activate plugin\n"
"performance-mode\tenable cacheline-aware layout randomization\n"
};
-struct whitelist_entry {
- const char *pathname;
- const char *lhs;
- const char *rhs;
-};
-
-static const struct whitelist_entry whitelist[] = {
- /* NIU overloads mapping with page struct */
- { "drivers/net/ethernet/sun/niu.c", "page", "address_space" },
- /* unix_skb_parms via UNIXCB() buffer */
- { "net/unix/af_unix.c", "unix_skb_parms", "char" },
- /* big_key payload.data struct splashing */
- { "security/keys/big_key.c", "path", "void *" },
- /* walk struct security_hook_heads as an array of struct list_head */
- { "security/security.c", "list_head", "security_hook_heads" },
- { }
-};
-
/* from old Linux dcache.h */
static inline unsigned long
partial_name_hash(unsigned long c, unsigned long prevhash)
@@ -95,6 +73,9 @@ static tree handle_randomize_layout_attr(tree *node, tree name, tree args, int f
if (TYPE_P(*node)) {
type = *node;
+ } else if (TREE_CODE(*node) == FIELD_DECL) {
+ *no_add_attrs = false;
+ return NULL_TREE;
} else {
gcc_assert(TREE_CODE(*node) == TYPE_DECL);
type = TREE_TYPE(*node);
@@ -209,12 +190,14 @@ static void partition_struct(tree *fields, unsigned long length, struct partitio
static void performance_shuffle(tree *newtree, unsigned long length, ranctx *prng_state)
{
- unsigned long i, x;
+ unsigned long i, x, index;
struct partition_group size_group[length];
unsigned long num_groups = 0;
unsigned long randnum;
partition_struct(newtree, length, (struct partition_group *)&size_group, &num_groups);
+
+ /* FIXME: this group shuffle is currently a no-op. */
for (i = num_groups - 1; i > 0; i--) {
struct partition_group tmp;
randnum = ranval(prng_state) % (i + 1);
@@ -224,11 +207,14 @@ static void performance_shuffle(tree *newtree, unsigned long length, ranctx *prn
}
for (x = 0; x < num_groups; x++) {
- for (i = size_group[x].start + size_group[x].length - 1; i > size_group[x].start; i--) {
+ for (index = size_group[x].length - 1; index > 0; index--) {
tree tmp;
+
+ i = size_group[x].start + index;
if (DECL_BIT_FIELD_TYPE(newtree[i]))
continue;
- randnum = ranval(prng_state) % (i + 1);
+ randnum = ranval(prng_state) % (index + 1);
+ randnum += size_group[x].start;
// we could handle this case differently if desired
if (DECL_BIT_FIELD_TYPE(newtree[randnum]))
continue;
@@ -291,8 +277,6 @@ static bool is_flexible_array(const_tree field)
{
const_tree fieldtype;
const_tree typesize;
- const_tree elemtype;
- const_tree elemsize;
fieldtype = TREE_TYPE(field);
typesize = TYPE_SIZE(fieldtype);
@@ -300,20 +284,12 @@ static bool is_flexible_array(const_tree field)
if (TREE_CODE(fieldtype) != ARRAY_TYPE)
return false;
- elemtype = TREE_TYPE(fieldtype);
- elemsize = TYPE_SIZE(elemtype);
-
/* size of type is represented in bits */
if (typesize == NULL_TREE && TYPE_DOMAIN(fieldtype) != NULL_TREE &&
TYPE_MAX_VALUE(TYPE_DOMAIN(fieldtype)) == NULL_TREE)
return true;
- if (typesize != NULL_TREE &&
- (TREE_CONSTANT(typesize) && (!tree_to_uhwi(typesize) ||
- tree_to_uhwi(typesize) == tree_to_uhwi(elemsize))))
- return true;
-
return false;
}
@@ -362,8 +338,7 @@ static int relayout_struct(tree type)
/*
* enforce that we don't randomize the layout of the last
- * element of a struct if it's a 0 or 1-length array
- * or a proper flexible array
+ * element of a struct if it's a proper flexible array
*/
if (is_flexible_array(newtree[num_fields - 1])) {
has_flexarray = true;
@@ -372,35 +347,18 @@ static int relayout_struct(tree type)
shuffle(type, (tree *)newtree, shuffle_length);
- /*
- * set up a bogus anonymous struct field designed to error out on unnamed struct initializers
- * as gcc provides no other way to detect such code
- */
- list = make_node(FIELD_DECL);
- TREE_CHAIN(list) = newtree[0];
- TREE_TYPE(list) = void_type_node;
- DECL_SIZE(list) = bitsize_zero_node;
- DECL_NONADDRESSABLE_P(list) = 1;
- DECL_FIELD_BIT_OFFSET(list) = bitsize_zero_node;
- DECL_SIZE_UNIT(list) = size_zero_node;
- DECL_FIELD_OFFSET(list) = size_zero_node;
- DECL_CONTEXT(list) = type;
- // to satisfy the constify plugin
- TREE_READONLY(list) = 1;
-
for (i = 0; i < num_fields - 1; i++)
TREE_CHAIN(newtree[i]) = newtree[i+1];
TREE_CHAIN(newtree[num_fields - 1]) = NULL_TREE;
+ add_type_attr(type, "randomize_performed", NULL_TREE);
+ add_type_attr(type, "designated_init", NULL_TREE);
+ if (has_flexarray)
+ add_type_attr(type, "has_flexarray", NULL_TREE);
+
main_variant = TYPE_MAIN_VARIANT(type);
- for (variant = main_variant; variant; variant = TYPE_NEXT_VARIANT(variant)) {
- TYPE_FIELDS(variant) = list;
- TYPE_ATTRIBUTES(variant) = copy_list(TYPE_ATTRIBUTES(variant));
- TYPE_ATTRIBUTES(variant) = tree_cons(get_identifier("randomize_performed"), NULL_TREE, TYPE_ATTRIBUTES(variant));
- TYPE_ATTRIBUTES(variant) = tree_cons(get_identifier("designated_init"), NULL_TREE, TYPE_ATTRIBUTES(variant));
- if (has_flexarray)
- TYPE_ATTRIBUTES(type) = tree_cons(get_identifier("has_flexarray"), NULL_TREE, TYPE_ATTRIBUTES(type));
- }
+ for (variant = main_variant; variant; variant = TYPE_NEXT_VARIANT(variant))
+ TYPE_FIELDS(variant) = newtree[0];
/*
* force a re-layout of the main variant
@@ -436,9 +394,6 @@ static int is_pure_ops_struct(const_tree node)
gcc_assert(TREE_CODE(node) == RECORD_TYPE || TREE_CODE(node) == UNION_TYPE);
- /* XXX: Do not apply randomization to all-ftpr structs yet. */
- return 0;
-
for (field = TYPE_FIELDS(node); field; field = TREE_CHAIN(field)) {
const_tree fieldtype = get_field_type(field);
enum tree_code code = TREE_CODE(fieldtype);
@@ -446,13 +401,13 @@ static int is_pure_ops_struct(const_tree node)
if (node == fieldtype)
continue;
- if (!is_fptr(fieldtype))
- return 0;
-
- if (code != RECORD_TYPE && code != UNION_TYPE)
+ if (code == RECORD_TYPE || code == UNION_TYPE) {
+ if (!is_pure_ops_struct(fieldtype))
+ return 0;
continue;
+ }
- if (!is_pure_ops_struct(fieldtype))
+ if (!is_fptr(fieldtype))
return 0;
}
@@ -471,10 +426,8 @@ static void randomize_type(tree type)
if (lookup_attribute("randomize_layout", TYPE_ATTRIBUTES(TYPE_MAIN_VARIANT(type))) || is_pure_ops_struct(type))
relayout_struct(type);
- for (variant = TYPE_MAIN_VARIANT(type); variant; variant = TYPE_NEXT_VARIANT(variant)) {
- TYPE_ATTRIBUTES(type) = copy_list(TYPE_ATTRIBUTES(type));
- TYPE_ATTRIBUTES(type) = tree_cons(get_identifier("randomize_considered"), NULL_TREE, TYPE_ATTRIBUTES(type));
- }
+ add_type_attr(type, "randomize_considered", NULL_TREE);
+
#ifdef __DEBUG_PLUGIN
fprintf(stderr, "Marking randomize_considered on struct %s\n", ORIG_TYPE_NAME(type));
#ifdef __DEBUG_VERBOSE
@@ -583,68 +536,31 @@ static void finish_type(void *event_data, void *data)
return;
}
-static struct attribute_spec randomize_layout_attr = {
- .name = "randomize_layout",
- // related to args
- .min_length = 0,
- .max_length = 0,
- .decl_required = false,
- // need type declaration
- .type_required = true,
- .function_type_required = false,
- .handler = handle_randomize_layout_attr,
-#if BUILDING_GCC_VERSION >= 4007
- .affects_type_identity = true
-#endif
-};
+static struct attribute_spec randomize_layout_attr = { };
+static struct attribute_spec no_randomize_layout_attr = { };
+static struct attribute_spec randomize_considered_attr = { };
+static struct attribute_spec randomize_performed_attr = { };
-static struct attribute_spec no_randomize_layout_attr = {
- .name = "no_randomize_layout",
- // related to args
- .min_length = 0,
- .max_length = 0,
- .decl_required = false,
- // need type declaration
- .type_required = true,
- .function_type_required = false,
- .handler = handle_randomize_layout_attr,
-#if BUILDING_GCC_VERSION >= 4007
- .affects_type_identity = true
-#endif
-};
+static void register_attributes(void *event_data, void *data)
+{
+ randomize_layout_attr.name = "randomize_layout";
+ randomize_layout_attr.type_required = true;
+ randomize_layout_attr.handler = handle_randomize_layout_attr;
+ randomize_layout_attr.affects_type_identity = true;
-static struct attribute_spec randomize_considered_attr = {
- .name = "randomize_considered",
- // related to args
- .min_length = 0,
- .max_length = 0,
- .decl_required = false,
- // need type declaration
- .type_required = true,
- .function_type_required = false,
- .handler = handle_randomize_considered_attr,
-#if BUILDING_GCC_VERSION >= 4007
- .affects_type_identity = false
-#endif
-};
+ no_randomize_layout_attr.name = "no_randomize_layout";
+ no_randomize_layout_attr.type_required = true;
+ no_randomize_layout_attr.handler = handle_randomize_layout_attr;
+ no_randomize_layout_attr.affects_type_identity = true;
-static struct attribute_spec randomize_performed_attr = {
- .name = "randomize_performed",
- // related to args
- .min_length = 0,
- .max_length = 0,
- .decl_required = false,
- // need type declaration
- .type_required = true,
- .function_type_required = false,
- .handler = handle_randomize_performed_attr,
-#if BUILDING_GCC_VERSION >= 4007
- .affects_type_identity = false
-#endif
-};
+ randomize_considered_attr.name = "randomize_considered";
+ randomize_considered_attr.type_required = true;
+ randomize_considered_attr.handler = handle_randomize_considered_attr;
+
+ randomize_performed_attr.name = "randomize_performed";
+ randomize_performed_attr.type_required = true;
+ randomize_performed_attr.handler = handle_randomize_performed_attr;
-static void register_attributes(void *event_data, void *data)
-{
register_attribute(&randomize_layout_attr);
register_attribute(&no_randomize_layout_attr);
register_attribute(&randomize_considered_attr);
@@ -782,60 +698,6 @@ static void handle_local_var_initializers(void)
}
}
-static bool type_name_eq(gimple stmt, const_tree type_tree, const char *wanted_name)
-{
- const char *type_name;
-
- if (type_tree == NULL_TREE)
- return false;
-
- switch (TREE_CODE(type_tree)) {
- case RECORD_TYPE:
- type_name = TYPE_NAME_POINTER(type_tree);
- break;
- case INTEGER_TYPE:
- if (TYPE_PRECISION(type_tree) == CHAR_TYPE_SIZE)
- type_name = "char";
- else {
- INFORM(gimple_location(stmt), "found non-char INTEGER_TYPE cast comparison: %qT\n", type_tree);
- debug_tree(type_tree);
- return false;
- }
- break;
- case POINTER_TYPE:
- if (TREE_CODE(TREE_TYPE(type_tree)) == VOID_TYPE) {
- type_name = "void *";
- break;
- } else {
- INFORM(gimple_location(stmt), "found non-void POINTER_TYPE cast comparison %qT\n", type_tree);
- debug_tree(type_tree);
- return false;
- }
- default:
- INFORM(gimple_location(stmt), "unhandled cast comparison: %qT\n", type_tree);
- debug_tree(type_tree);
- return false;
- }
-
- return strcmp(type_name, wanted_name) == 0;
-}
-
-static bool whitelisted_cast(gimple stmt, const_tree lhs_tree, const_tree rhs_tree)
-{
- const struct whitelist_entry *entry;
- expanded_location xloc = expand_location(gimple_location(stmt));
-
- for (entry = whitelist; entry->pathname; entry++) {
- if (!strstr(xloc.file, entry->pathname))
- continue;
-
- if (type_name_eq(stmt, lhs_tree, entry->lhs) && type_name_eq(stmt, rhs_tree, entry->rhs))
- return true;
- }
-
- return false;
-}
-
/*
* iterate over all statements to find "bad" casts:
* those where the address of the start of a structure is cast
@@ -912,10 +774,7 @@ static unsigned int find_bad_casts_execute(void)
#ifndef __DEBUG_PLUGIN
if (lookup_attribute("randomize_performed", TYPE_ATTRIBUTES(ptr_lhs_type)))
#endif
- {
- if (!whitelisted_cast(stmt, ptr_lhs_type, ptr_rhs_type))
- MISMATCH(gimple_location(stmt), "rhs", ptr_lhs_type, ptr_rhs_type);
- }
+ MISMATCH(gimple_location(stmt), "rhs", ptr_lhs_type, ptr_rhs_type);
continue;
}
@@ -938,10 +797,7 @@ static unsigned int find_bad_casts_execute(void)
#ifndef __DEBUG_PLUGIN
if (lookup_attribute("randomize_performed", TYPE_ATTRIBUTES(op0_type)))
#endif
- {
- if (!whitelisted_cast(stmt, ptr_lhs_type, op0_type))
- MISMATCH(gimple_location(stmt), "op0", ptr_lhs_type, op0_type);
- }
+ MISMATCH(gimple_location(stmt), "op0", ptr_lhs_type, op0_type);
} else {
const_tree ssa_name_var = SSA_NAME_VAR(rhs1);
/* skip bogus type casts introduced by container_of */
@@ -951,10 +807,7 @@ static unsigned int find_bad_casts_execute(void)
#ifndef __DEBUG_PLUGIN
if (lookup_attribute("randomize_performed", TYPE_ATTRIBUTES(ptr_rhs_type)))
#endif
- {
- if (!whitelisted_cast(stmt, ptr_lhs_type, ptr_rhs_type))
- MISMATCH(gimple_location(stmt), "ssa", ptr_lhs_type, ptr_rhs_type);
- }
+ MISMATCH(gimple_location(stmt), "ssa", ptr_lhs_type, ptr_rhs_type);
}
}
diff --git a/scripts/gcc-plugins/sancov_plugin.c b/scripts/gcc-plugins/sancov_plugin.c
deleted file mode 100644
index 0f98634c20a0..000000000000
--- a/scripts/gcc-plugins/sancov_plugin.c
+++ /dev/null
@@ -1,140 +0,0 @@
-/*
- * Copyright 2011-2016 by Emese Revfy <re.emese@gmail.com>
- * Licensed under the GPL v2, or (at your option) v3
- *
- * Homepage:
- * https://github.com/ephox-gcc-plugins/sancov
- *
- * This plugin inserts a __sanitizer_cov_trace_pc() call at the start of basic blocks.
- * It supports all gcc versions with plugin support (from gcc-4.5 on).
- * It is based on the commit "Add fuzzing coverage support" by Dmitry Vyukov <dvyukov@google.com>.
- *
- * You can read about it more here:
- * https://gcc.gnu.org/viewcvs/gcc?limit_changes=0&view=revision&revision=231296
- * http://lwn.net/Articles/674854/
- * https://github.com/google/syzkaller
- * https://lwn.net/Articles/677764/
- *
- * Usage:
- * make run
- */
-
-#include "gcc-common.h"
-
-__visible int plugin_is_GPL_compatible;
-
-tree sancov_fndecl;
-
-static struct plugin_info sancov_plugin_info = {
- .version = "20160402",
- .help = "sancov plugin\n",
-};
-
-static unsigned int sancov_execute(void)
-{
- basic_block bb;
-
- /* Remove this line when this plugin and kcov will be in the kernel.
- if (!strcmp(DECL_NAME_POINTER(current_function_decl), DECL_NAME_POINTER(sancov_fndecl)))
- return 0;
- */
-
- FOR_EACH_BB_FN(bb, cfun) {
- const_gimple stmt;
- gcall *gcall;
- gimple_stmt_iterator gsi = gsi_after_labels(bb);
-
- if (gsi_end_p(gsi))
- continue;
-
- stmt = gsi_stmt(gsi);
- gcall = as_a_gcall(gimple_build_call(sancov_fndecl, 0));
- gimple_set_location(gcall, gimple_location(stmt));
- gsi_insert_before(&gsi, gcall, GSI_SAME_STMT);
- }
- return 0;
-}
-
-#define PASS_NAME sancov
-
-#define NO_GATE
-#define TODO_FLAGS_FINISH TODO_dump_func | TODO_verify_stmts | TODO_update_ssa_no_phi | TODO_verify_flow
-
-#include "gcc-generate-gimple-pass.h"
-
-static void sancov_start_unit(void __unused *gcc_data, void __unused *user_data)
-{
- tree leaf_attr, nothrow_attr;
- tree BT_FN_VOID = build_function_type_list(void_type_node, NULL_TREE);
-
- sancov_fndecl = build_fn_decl("__sanitizer_cov_trace_pc", BT_FN_VOID);
-
- DECL_ASSEMBLER_NAME(sancov_fndecl);
- TREE_PUBLIC(sancov_fndecl) = 1;
- DECL_EXTERNAL(sancov_fndecl) = 1;
- DECL_ARTIFICIAL(sancov_fndecl) = 1;
- DECL_PRESERVE_P(sancov_fndecl) = 1;
- DECL_UNINLINABLE(sancov_fndecl) = 1;
- TREE_USED(sancov_fndecl) = 1;
-
- nothrow_attr = tree_cons(get_identifier("nothrow"), NULL, NULL);
- decl_attributes(&sancov_fndecl, nothrow_attr, 0);
- gcc_assert(TREE_NOTHROW(sancov_fndecl));
-#if BUILDING_GCC_VERSION > 4005
- leaf_attr = tree_cons(get_identifier("leaf"), NULL, NULL);
- decl_attributes(&sancov_fndecl, leaf_attr, 0);
-#endif
-}
-
-__visible int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version)
-{
- int i;
- const char * const plugin_name = plugin_info->base_name;
- const int argc = plugin_info->argc;
- const struct plugin_argument * const argv = plugin_info->argv;
- bool enable = true;
-
- static const struct ggc_root_tab gt_ggc_r_gt_sancov[] = {
- {
- .base = &sancov_fndecl,
- .nelt = 1,
- .stride = sizeof(sancov_fndecl),
- .cb = &gt_ggc_mx_tree_node,
- .pchw = &gt_pch_nx_tree_node
- },
- LAST_GGC_ROOT_TAB
- };
-
- /* BBs can be split afterwards?? */
-#if BUILDING_GCC_VERSION >= 4009
- PASS_INFO(sancov, "asan", 0, PASS_POS_INSERT_BEFORE);
-#else
- PASS_INFO(sancov, "nrv", 1, PASS_POS_INSERT_BEFORE);
-#endif
-
- if (!plugin_default_version_check(version, &gcc_version)) {
- error(G_("incompatible gcc/plugin versions"));
- return 1;
- }
-
- for (i = 0; i < argc; ++i) {
- if (!strcmp(argv[i].key, "no-sancov")) {
- enable = false;
- continue;
- }
- error(G_("unknown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key);
- }
-
- register_callback(plugin_name, PLUGIN_INFO, NULL, &sancov_plugin_info);
-
- if (!enable)
- return 0;
-
-#if BUILDING_GCC_VERSION < 6000
- register_callback(plugin_name, PLUGIN_START_UNIT, &sancov_start_unit, NULL);
- register_callback(plugin_name, PLUGIN_REGISTER_GGC_ROOTS, NULL, (void *)&gt_ggc_r_gt_sancov);
- register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &sancov_pass_info);
-#endif
-
- return 0;
-}
diff --git a/scripts/gcc-plugins/stackleak_plugin.c b/scripts/gcc-plugins/stackleak_plugin.c
new file mode 100644
index 000000000000..e486488c867d
--- /dev/null
+++ b/scripts/gcc-plugins/stackleak_plugin.c
@@ -0,0 +1,635 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/*
+ * Copyright 2011-2017 by the PaX Team <pageexec@freemail.hu>
+ * Modified by Alexander Popov <alex.popov@linux.com>
+ *
+ * Note: the choice of the license means that the compilation process is
+ * NOT 'eligible' as defined by gcc's library exception to the GPL v3,
+ * but for the kernel it doesn't matter since it doesn't link against
+ * any of the gcc libraries
+ *
+ * This gcc plugin is needed for tracking the lowest border of the kernel stack.
+ * It instruments the kernel code inserting __sanitizer_cov_stack_depth() calls:
+ * - after alloca();
+ * - for the functions with a stack frame size greater than or equal
+ * to the "track-min-size" plugin parameter.
+ *
+ * This plugin is ported from grsecurity/PaX. For more information see:
+ * https://grsecurity.net/
+ * https://pax.grsecurity.net/
+ *
+ * Debugging:
+ * - use fprintf() to stderr, debug_generic_expr(), debug_gimple_stmt(),
+ * print_rtl_single() and debug_rtx();
+ * - add "-fdump-tree-all -fdump-rtl-all" to the plugin CFLAGS in
+ * Makefile.gcc-plugins to see the verbose dumps of the gcc passes;
+ * - use gcc -E to understand the preprocessing shenanigans;
+ * - use gcc with enabled CFG/GIMPLE/SSA verification (--enable-checking).
+ */
+
+#include "gcc-common.h"
+
+__visible int plugin_is_GPL_compatible;
+
+static int track_frame_size = -1;
+static bool build_for_x86 = false;
+static const char track_function[] = "__sanitizer_cov_stack_depth";
+static bool disable = false;
+static bool verbose = false;
+
+/*
+ * Mark these global variables (roots) for gcc garbage collector since
+ * they point to the garbage-collected memory.
+ */
+static GTY(()) tree track_function_decl;
+
+static struct plugin_info stackleak_plugin_info = {
+ .version = PLUGIN_VERSION,
+ .help = "track-min-size=nn\ttrack stack for functions with a stack frame size >= nn bytes\n"
+ "arch=target_arch\tspecify target build arch\n"
+ "disable\t\tdo not activate the plugin\n"
+ "verbose\t\tprint info about the instrumentation\n"
+};
+
+static void add_stack_tracking_gcall(gimple_stmt_iterator *gsi, bool after)
+{
+ gimple stmt;
+ gcall *gimple_call;
+ cgraph_node_ptr node;
+ basic_block bb;
+
+ /* Insert calling __sanitizer_cov_stack_depth() */
+ stmt = gimple_build_call(track_function_decl, 0);
+ gimple_call = as_a_gcall(stmt);
+ if (after)
+ gsi_insert_after(gsi, gimple_call, GSI_CONTINUE_LINKING);
+ else
+ gsi_insert_before(gsi, gimple_call, GSI_SAME_STMT);
+
+ /* Update the cgraph */
+ bb = gimple_bb(gimple_call);
+ node = cgraph_get_create_node(track_function_decl);
+ gcc_assert(node);
+ cgraph_create_edge(cgraph_get_node(current_function_decl), node,
+ gimple_call, bb->count,
+ compute_call_stmt_bb_frequency(current_function_decl, bb));
+}
+
+static bool is_alloca(gimple stmt)
+{
+ if (gimple_call_builtin_p(stmt, BUILT_IN_ALLOCA))
+ return true;
+
+ if (gimple_call_builtin_p(stmt, BUILT_IN_ALLOCA_WITH_ALIGN))
+ return true;
+
+ return false;
+}
+
+static tree get_current_stack_pointer_decl(void)
+{
+ varpool_node_ptr node;
+
+ FOR_EACH_VARIABLE(node) {
+ tree var = NODE_DECL(node);
+ tree name = DECL_NAME(var);
+
+ if (DECL_NAME_LENGTH(var) != sizeof("current_stack_pointer") - 1)
+ continue;
+
+ if (strcmp(IDENTIFIER_POINTER(name), "current_stack_pointer"))
+ continue;
+
+ return var;
+ }
+
+ if (verbose) {
+ fprintf(stderr, "stackleak: missing current_stack_pointer in %s()\n",
+ DECL_NAME_POINTER(current_function_decl));
+ }
+ return NULL_TREE;
+}
+
+static void add_stack_tracking_gasm(gimple_stmt_iterator *gsi, bool after)
+{
+ gasm *asm_call = NULL;
+ tree sp_decl, input;
+ vec<tree, va_gc> *inputs = NULL;
+
+ /* 'no_caller_saved_registers' is currently supported only for x86 */
+ gcc_assert(build_for_x86);
+
+ /*
+ * Insert calling __sanitizer_cov_stack_depth() in asm:
+ * asm volatile("call __sanitizer_cov_stack_depth"
+ * :: "r" (current_stack_pointer))
+ * Use ASM_CALL_CONSTRAINT trick from arch/x86/include/asm/asm.h.
+ * This constraint is taken into account during gcc shrink-wrapping
+ * optimization. It is needed to be sure that __sanitizer_cov_stack_depth()
+ * call is inserted after the prologue of the containing function,
+ * when the stack frame is prepared.
+ */
+ sp_decl = get_current_stack_pointer_decl();
+ if (sp_decl == NULL_TREE) {
+ add_stack_tracking_gcall(gsi, after);
+ return;
+ }
+ input = build_tree_list(NULL_TREE, build_const_char_string(2, "r"));
+ input = chainon(NULL_TREE, build_tree_list(input, sp_decl));
+ vec_safe_push(inputs, input);
+ asm_call = gimple_build_asm_vec("call __sanitizer_cov_stack_depth",
+ inputs, NULL, NULL, NULL);
+ gimple_asm_set_volatile(asm_call, true);
+ if (after)
+ gsi_insert_after(gsi, asm_call, GSI_CONTINUE_LINKING);
+ else
+ gsi_insert_before(gsi, asm_call, GSI_SAME_STMT);
+ update_stmt(asm_call);
+}
+
+static void add_stack_tracking(gimple_stmt_iterator *gsi, bool after)
+{
+ /*
+ * The 'no_caller_saved_registers' attribute is used for
+ * __sanitizer_cov_stack_depth(). If the compiler supports this attribute for
+ * the target arch, we can add calling __sanitizer_cov_stack_depth() in asm.
+ * That improves performance: we avoid useless operations with the
+ * caller-saved registers in the functions from which we will remove
+ * __sanitizer_cov_stack_depth() call during the stackleak_cleanup pass.
+ */
+ if (lookup_attribute_spec(get_identifier("no_caller_saved_registers")))
+ add_stack_tracking_gasm(gsi, after);
+ else
+ add_stack_tracking_gcall(gsi, after);
+}
+
+/*
+ * Work with the GIMPLE representation of the code. Insert the
+ * __sanitizer_cov_stack_depth() call after alloca() and into the beginning
+ * of the function if it is not instrumented.
+ */
+static unsigned int stackleak_instrument_execute(void)
+{
+ basic_block bb, entry_bb;
+ bool prologue_instrumented = false, is_leaf = true;
+ gimple_stmt_iterator gsi = { 0 };
+
+ /*
+ * ENTRY_BLOCK_PTR is a basic block which represents possible entry
+ * point of a function. This block does not contain any code and
+ * has a CFG edge to its successor.
+ */
+ gcc_assert(single_succ_p(ENTRY_BLOCK_PTR_FOR_FN(cfun)));
+ entry_bb = single_succ(ENTRY_BLOCK_PTR_FOR_FN(cfun));
+
+ /*
+ * Loop through the GIMPLE statements in each of cfun basic blocks.
+ * cfun is a global variable which represents the function that is
+ * currently processed.
+ */
+ FOR_EACH_BB_FN(bb, cfun) {
+ for (gsi = gsi_start_bb(bb); !gsi_end_p(gsi); gsi_next(&gsi)) {
+ gimple stmt;
+
+ stmt = gsi_stmt(gsi);
+
+ /* Leaf function is a function which makes no calls */
+ if (is_gimple_call(stmt))
+ is_leaf = false;
+
+ if (!is_alloca(stmt))
+ continue;
+
+ if (verbose) {
+ fprintf(stderr, "stackleak: be careful, alloca() in %s()\n",
+ DECL_NAME_POINTER(current_function_decl));
+ }
+
+ /* Insert __sanitizer_cov_stack_depth() call after alloca() */
+ add_stack_tracking(&gsi, true);
+ if (bb == entry_bb)
+ prologue_instrumented = true;
+ }
+ }
+
+ if (prologue_instrumented)
+ return 0;
+
+ /*
+ * Special cases to skip the instrumentation.
+ *
+ * Taking the address of static inline functions materializes them,
+ * but we mustn't instrument some of them as the resulting stack
+ * alignment required by the function call ABI will break other
+ * assumptions regarding the expected (but not otherwise enforced)
+ * register clobbering ABI.
+ *
+ * Case in point: native_save_fl on amd64 when optimized for size
+ * clobbers rdx if it were instrumented here.
+ *
+ * TODO: any more special cases?
+ */
+ if (is_leaf &&
+ !TREE_PUBLIC(current_function_decl) &&
+ DECL_DECLARED_INLINE_P(current_function_decl)) {
+ return 0;
+ }
+
+ if (is_leaf &&
+ !strncmp(IDENTIFIER_POINTER(DECL_NAME(current_function_decl)),
+ "_paravirt_", 10)) {
+ return 0;
+ }
+
+ /* Insert __sanitizer_cov_stack_depth() call at the function beginning */
+ bb = entry_bb;
+ if (!single_pred_p(bb)) {
+ /* gcc_assert(bb_loop_depth(bb) ||
+ (bb->flags & BB_IRREDUCIBLE_LOOP)); */
+ split_edge(single_succ_edge(ENTRY_BLOCK_PTR_FOR_FN(cfun)));
+ gcc_assert(single_succ_p(ENTRY_BLOCK_PTR_FOR_FN(cfun)));
+ bb = single_succ(ENTRY_BLOCK_PTR_FOR_FN(cfun));
+ }
+ gsi = gsi_after_labels(bb);
+ add_stack_tracking(&gsi, false);
+
+ return 0;
+}
+
+static bool large_stack_frame(void)
+{
+#if BUILDING_GCC_VERSION >= 8000
+ return maybe_ge(get_frame_size(), track_frame_size);
+#else
+ return (get_frame_size() >= track_frame_size);
+#endif
+}
+
+static void remove_stack_tracking_gcall(void)
+{
+ rtx_insn *insn, *next;
+
+ /*
+ * Find __sanitizer_cov_stack_depth() calls. Loop through the chain of insns,
+ * which is an RTL representation of the code for a function.
+ *
+ * The example of a matching insn:
+ * (call_insn 8 4 10 2 (call (mem (symbol_ref ("__sanitizer_cov_stack_depth")
+ * [flags 0x41] <function_decl 0x7f7cd3302a80 __sanitizer_cov_stack_depth>)
+ * [0 __sanitizer_cov_stack_depth S1 A8]) (0)) 675 {*call} (expr_list
+ * (symbol_ref ("__sanitizer_cov_stack_depth") [flags 0x41] <function_decl
+ * 0x7f7cd3302a80 __sanitizer_cov_stack_depth>) (expr_list (0) (nil))) (nil))
+ */
+ for (insn = get_insns(); insn; insn = next) {
+ rtx body;
+
+ next = NEXT_INSN(insn);
+
+ /* Check the expression code of the insn */
+ if (!CALL_P(insn))
+ continue;
+
+ /*
+ * Check the expression code of the insn body, which is an RTL
+ * Expression (RTX) describing the side effect performed by
+ * that insn.
+ */
+ body = PATTERN(insn);
+
+ if (GET_CODE(body) == PARALLEL)
+ body = XVECEXP(body, 0, 0);
+
+ if (GET_CODE(body) != CALL)
+ continue;
+
+ /*
+ * Check the first operand of the call expression. It should
+ * be a mem RTX describing the needed subroutine with a
+ * symbol_ref RTX.
+ */
+ body = XEXP(body, 0);
+ if (GET_CODE(body) != MEM)
+ continue;
+
+ body = XEXP(body, 0);
+ if (GET_CODE(body) != SYMBOL_REF)
+ continue;
+
+ if (SYMBOL_REF_DECL(body) != track_function_decl)
+ continue;
+
+ /* Delete the __sanitizer_cov_stack_depth() call */
+ delete_insn_and_edges(insn);
+#if BUILDING_GCC_VERSION < 8000
+ if (GET_CODE(next) == NOTE &&
+ NOTE_KIND(next) == NOTE_INSN_CALL_ARG_LOCATION) {
+ insn = next;
+ next = NEXT_INSN(insn);
+ delete_insn_and_edges(insn);
+ }
+#endif
+ }
+}
+
+static bool remove_stack_tracking_gasm(void)
+{
+ bool removed = false;
+ rtx_insn *insn, *next;
+
+ /* 'no_caller_saved_registers' is currently supported only for x86 */
+ gcc_assert(build_for_x86);
+
+ /*
+ * Find __sanitizer_cov_stack_depth() asm calls. Loop through the chain of
+ * insns, which is an RTL representation of the code for a function.
+ *
+ * The example of a matching insn:
+ * (insn 11 5 12 2 (parallel [ (asm_operands/v
+ * ("call __sanitizer_cov_stack_depth") ("") 0
+ * [ (reg/v:DI 7 sp [ current_stack_pointer ]) ]
+ * [ (asm_input:DI ("r")) ] [])
+ * (clobber (reg:CC 17 flags)) ]) -1 (nil))
+ */
+ for (insn = get_insns(); insn; insn = next) {
+ rtx body;
+
+ next = NEXT_INSN(insn);
+
+ /* Check the expression code of the insn */
+ if (!NONJUMP_INSN_P(insn))
+ continue;
+
+ /*
+ * Check the expression code of the insn body, which is an RTL
+ * Expression (RTX) describing the side effect performed by
+ * that insn.
+ */
+ body = PATTERN(insn);
+
+ if (GET_CODE(body) != PARALLEL)
+ continue;
+
+ body = XVECEXP(body, 0, 0);
+
+ if (GET_CODE(body) != ASM_OPERANDS)
+ continue;
+
+ if (strcmp(ASM_OPERANDS_TEMPLATE(body),
+ "call __sanitizer_cov_stack_depth")) {
+ continue;
+ }
+
+ delete_insn_and_edges(insn);
+ gcc_assert(!removed);
+ removed = true;
+ }
+
+ return removed;
+}
+
+/*
+ * Work with the RTL representation of the code.
+ * Remove the unneeded __sanitizer_cov_stack_depth() calls from the functions
+ * which don't call alloca() and don't have a large enough stack frame size.
+ */
+static unsigned int stackleak_cleanup_execute(void)
+{
+ const char *fn = DECL_NAME_POINTER(current_function_decl);
+ bool removed = false;
+
+ /*
+ * Leave stack tracking in functions that call alloca().
+ * Additional case:
+ * gcc before version 7 called allocate_dynamic_stack_space() from
+ * expand_stack_vars() for runtime alignment of constant-sized stack
+ * variables. That caused cfun->calls_alloca to be set for functions
+ * that in fact don't use alloca().
+ * For more info see gcc commit 7072df0aae0c59ae437e.
+ * Let's leave such functions instrumented as well.
+ */
+ if (cfun->calls_alloca) {
+ if (verbose)
+ fprintf(stderr, "stackleak: instrument %s(): calls_alloca\n", fn);
+ return 0;
+ }
+
+ /* Leave stack tracking in functions with large stack frame */
+ if (large_stack_frame()) {
+ if (verbose)
+ fprintf(stderr, "stackleak: instrument %s()\n", fn);
+ return 0;
+ }
+
+ if (lookup_attribute_spec(get_identifier("no_caller_saved_registers")))
+ removed = remove_stack_tracking_gasm();
+
+ if (!removed)
+ remove_stack_tracking_gcall();
+
+ return 0;
+}
+
+/*
+ * STRING_CST may or may not be NUL terminated:
+ * https://gcc.gnu.org/onlinedocs/gccint/Constant-expressions.html
+ */
+static inline bool string_equal(tree node, const char *string, int length)
+{
+ if (TREE_STRING_LENGTH(node) < length)
+ return false;
+ if (TREE_STRING_LENGTH(node) > length + 1)
+ return false;
+ if (TREE_STRING_LENGTH(node) == length + 1 &&
+ TREE_STRING_POINTER(node)[length] != '\0')
+ return false;
+ return !memcmp(TREE_STRING_POINTER(node), string, length);
+}
+#define STRING_EQUAL(node, str) string_equal(node, str, strlen(str))
+
+static bool stackleak_gate(void)
+{
+ tree section;
+
+ section = lookup_attribute("section",
+ DECL_ATTRIBUTES(current_function_decl));
+ if (section && TREE_VALUE(section)) {
+ section = TREE_VALUE(TREE_VALUE(section));
+
+ if (STRING_EQUAL(section, ".init.text"))
+ return false;
+ if (STRING_EQUAL(section, ".devinit.text"))
+ return false;
+ if (STRING_EQUAL(section, ".cpuinit.text"))
+ return false;
+ if (STRING_EQUAL(section, ".meminit.text"))
+ return false;
+ if (STRING_EQUAL(section, ".noinstr.text"))
+ return false;
+ if (STRING_EQUAL(section, ".entry.text"))
+ return false;
+ if (STRING_EQUAL(section, ".head.text"))
+ return false;
+ }
+
+ return track_frame_size >= 0;
+}
+
+/* Build the function declaration for __sanitizer_cov_stack_depth() */
+static void stackleak_start_unit(void *gcc_data __unused,
+ void *user_data __unused)
+{
+ tree fntype;
+
+ /* void __sanitizer_cov_stack_depth(void) */
+ fntype = build_function_type_list(void_type_node, NULL_TREE);
+ track_function_decl = build_fn_decl(track_function, fntype);
+ DECL_ASSEMBLER_NAME(track_function_decl); /* for LTO */
+ TREE_PUBLIC(track_function_decl) = 1;
+ TREE_USED(track_function_decl) = 1;
+ DECL_EXTERNAL(track_function_decl) = 1;
+ DECL_ARTIFICIAL(track_function_decl) = 1;
+ DECL_PRESERVE_P(track_function_decl) = 1;
+}
+
+/*
+ * Pass gate function is a predicate function that gets executed before the
+ * corresponding pass. If the return value is 'true' the pass gets executed,
+ * otherwise, it is skipped.
+ */
+static bool stackleak_instrument_gate(void)
+{
+ return stackleak_gate();
+}
+
+#define PASS_NAME stackleak_instrument
+#define PROPERTIES_REQUIRED PROP_gimple_leh | PROP_cfg
+#define TODO_FLAGS_START TODO_verify_ssa | TODO_verify_flow | TODO_verify_stmts
+#define TODO_FLAGS_FINISH TODO_verify_ssa | TODO_verify_stmts | TODO_dump_func \
+ | TODO_update_ssa | TODO_rebuild_cgraph_edges
+#include "gcc-generate-gimple-pass.h"
+
+static bool stackleak_cleanup_gate(void)
+{
+ return stackleak_gate();
+}
+
+#define PASS_NAME stackleak_cleanup
+#define TODO_FLAGS_FINISH TODO_dump_func
+#include "gcc-generate-rtl-pass.h"
+
+/*
+ * Every gcc plugin exports a plugin_init() function that is called right
+ * after the plugin is loaded. This function is responsible for registering
+ * the plugin callbacks and doing other required initialization.
+ */
+__visible int plugin_init(struct plugin_name_args *plugin_info,
+ struct plugin_gcc_version *version)
+{
+ const char * const plugin_name = plugin_info->base_name;
+ const int argc = plugin_info->argc;
+ const struct plugin_argument * const argv = plugin_info->argv;
+ int i = 0;
+
+ /* Extra GGC root tables describing our GTY-ed data */
+ static const struct ggc_root_tab gt_ggc_r_gt_stackleak[] = {
+ {
+ .base = &track_function_decl,
+ .nelt = 1,
+ .stride = sizeof(track_function_decl),
+ .cb = &gt_ggc_mx_tree_node,
+ .pchw = &gt_pch_nx_tree_node
+ },
+ LAST_GGC_ROOT_TAB
+ };
+
+ /*
+ * The stackleak_instrument pass should be executed before the
+ * "optimized" pass, which is the control flow graph cleanup that is
+ * performed just before expanding gcc trees to the RTL. In former
+ * versions of the plugin this new pass was inserted before the
+ * "tree_profile" pass, which is currently called "profile".
+ */
+ PASS_INFO(stackleak_instrument, "optimized", 1,
+ PASS_POS_INSERT_BEFORE);
+
+ /*
+ * The stackleak_cleanup pass should be executed before the "*free_cfg"
+ * pass. It's the moment when the stack frame size is already final,
+ * function prologues and epilogues are generated, and the
+ * machine-dependent code transformations are not done.
+ */
+ PASS_INFO(stackleak_cleanup, "*free_cfg", 1, PASS_POS_INSERT_BEFORE);
+
+ if (!plugin_default_version_check(version, &gcc_version)) {
+ error(G_("incompatible gcc/plugin versions"));
+ return 1;
+ }
+
+ /* Parse the plugin arguments */
+ for (i = 0; i < argc; i++) {
+ if (!strcmp(argv[i].key, "track-min-size")) {
+ if (!argv[i].value) {
+ error(G_("no value supplied for option '-fplugin-arg-%s-%s'"),
+ plugin_name, argv[i].key);
+ return 1;
+ }
+
+ track_frame_size = atoi(argv[i].value);
+ if (track_frame_size < 0) {
+ error(G_("invalid option argument '-fplugin-arg-%s-%s=%s'"),
+ plugin_name, argv[i].key, argv[i].value);
+ return 1;
+ }
+ } else if (!strcmp(argv[i].key, "arch")) {
+ if (!argv[i].value) {
+ error(G_("no value supplied for option '-fplugin-arg-%s-%s'"),
+ plugin_name, argv[i].key);
+ return 1;
+ }
+
+ if (!strcmp(argv[i].value, "x86"))
+ build_for_x86 = true;
+ } else if (!strcmp(argv[i].key, "disable")) {
+ disable = true;
+ } else if (!strcmp(argv[i].key, "verbose")) {
+ verbose = true;
+ } else {
+ error(G_("unknown option '-fplugin-arg-%s-%s'"),
+ plugin_name, argv[i].key);
+ return 1;
+ }
+ }
+
+ if (disable) {
+ if (verbose)
+ fprintf(stderr, "stackleak: disabled for this translation unit\n");
+ return 0;
+ }
+
+ /* Give the information about the plugin */
+ register_callback(plugin_name, PLUGIN_INFO, NULL,
+ &stackleak_plugin_info);
+
+ /* Register to be called before processing a translation unit */
+ register_callback(plugin_name, PLUGIN_START_UNIT,
+ &stackleak_start_unit, NULL);
+
+ /* Register an extra GCC garbage collector (GGC) root table */
+ register_callback(plugin_name, PLUGIN_REGISTER_GGC_ROOTS, NULL,
+ (void *)&gt_ggc_r_gt_stackleak);
+
+ /*
+ * Hook into the Pass Manager to register new gcc passes.
+ *
+ * The stack frame size info is available only at the last RTL pass,
+ * when it's too late to insert complex code like a function call.
+ * So we register two gcc passes to instrument every function at first
+ * and remove the unneeded instrumentation later.
+ */
+ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL,
+ &stackleak_instrument_pass_info);
+ register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL,
+ &stackleak_cleanup_pass_info);
+
+ return 0;
+}
diff --git a/scripts/gcc-plugins/structleak_plugin.c b/scripts/gcc-plugins/structleak_plugin.c
deleted file mode 100644
index fa3d7a4b26f2..000000000000
--- a/scripts/gcc-plugins/structleak_plugin.c
+++ /dev/null
@@ -1,246 +0,0 @@
-/*
- * Copyright 2013-2017 by PaX Team <pageexec@freemail.hu>
- * Licensed under the GPL v2
- *
- * Note: the choice of the license means that the compilation process is
- * NOT 'eligible' as defined by gcc's library exception to the GPL v3,
- * but for the kernel it doesn't matter since it doesn't link against
- * any of the gcc libraries
- *
- * gcc plugin to forcibly initialize certain local variables that could
- * otherwise leak kernel stack to userland if they aren't properly initialized
- * by later code
- *
- * Homepage: http://pax.grsecurity.net/
- *
- * Options:
- * -fplugin-arg-structleak_plugin-disable
- * -fplugin-arg-structleak_plugin-verbose
- *
- * Usage:
- * $ # for 4.5/4.6/C based 4.7
- * $ gcc -I`gcc -print-file-name=plugin`/include -I`gcc -print-file-name=plugin`/include/c-family -fPIC -shared -O2 -o structleak_plugin.so structleak_plugin.c
- * $ # for C++ based 4.7/4.8+
- * $ g++ -I`g++ -print-file-name=plugin`/include -I`g++ -print-file-name=plugin`/include/c-family -fPIC -shared -O2 -o structleak_plugin.so structleak_plugin.c
- * $ gcc -fplugin=./structleak_plugin.so test.c -O2
- *
- * TODO: eliminate redundant initializers
- * increase type coverage
- */
-
-#include "gcc-common.h"
-
-/* unused C type flag in all versions 4.5-6 */
-#define TYPE_USERSPACE(TYPE) TYPE_LANG_FLAG_5(TYPE)
-
-__visible int plugin_is_GPL_compatible;
-
-static struct plugin_info structleak_plugin_info = {
- .version = "201607271510vanilla",
- .help = "disable\tdo not activate plugin\n"
- "verbose\tprint all initialized variables\n",
-};
-
-static bool verbose;
-
-static tree handle_user_attribute(tree *node, tree name, tree args, int flags, bool *no_add_attrs)
-{
- *no_add_attrs = true;
-
- /* check for types? for now accept everything linux has to offer */
- if (TREE_CODE(*node) != FIELD_DECL)
- return NULL_TREE;
-
- *no_add_attrs = false;
- return NULL_TREE;
-}
-
-static struct attribute_spec user_attr = {
- .name = "user",
- .min_length = 0,
- .max_length = 0,
- .decl_required = false,
- .type_required = false,
- .function_type_required = false,
- .handler = handle_user_attribute,
-#if BUILDING_GCC_VERSION >= 4007
- .affects_type_identity = true
-#endif
-};
-
-static void register_attributes(void *event_data, void *data)
-{
- register_attribute(&user_attr);
-}
-
-static tree get_field_type(tree field)
-{
- return strip_array_types(TREE_TYPE(field));
-}
-
-static bool is_userspace_type(tree type)
-{
- tree field;
-
- for (field = TYPE_FIELDS(type); field; field = TREE_CHAIN(field)) {
- tree fieldtype = get_field_type(field);
- enum tree_code code = TREE_CODE(fieldtype);
-
- if (code == RECORD_TYPE || code == UNION_TYPE)
- if (is_userspace_type(fieldtype))
- return true;
-
- if (lookup_attribute("user", DECL_ATTRIBUTES(field)))
- return true;
- }
- return false;
-}
-
-static void finish_type(void *event_data, void *data)
-{
- tree type = (tree)event_data;
-
- if (type == NULL_TREE || type == error_mark_node)
- return;
-
-#if BUILDING_GCC_VERSION >= 5000
- if (TREE_CODE(type) == ENUMERAL_TYPE)
- return;
-#endif
-
- if (TYPE_USERSPACE(type))
- return;
-
- if (is_userspace_type(type))
- TYPE_USERSPACE(type) = 1;
-}
-
-static void initialize(tree var)
-{
- basic_block bb;
- gimple_stmt_iterator gsi;
- tree initializer;
- gimple init_stmt;
-
- /* this is the original entry bb before the forced split */
- bb = single_succ(ENTRY_BLOCK_PTR_FOR_FN(cfun));
-
- /* first check if variable is already initialized, warn otherwise */
- for (gsi = gsi_start_bb(bb); !gsi_end_p(gsi); gsi_next(&gsi)) {
- gimple stmt = gsi_stmt(gsi);
- tree rhs1;
-
- /* we're looking for an assignment of a single rhs... */
- if (!gimple_assign_single_p(stmt))
- continue;
- rhs1 = gimple_assign_rhs1(stmt);
-#if BUILDING_GCC_VERSION >= 4007
- /* ... of a non-clobbering expression... */
- if (TREE_CLOBBER_P(rhs1))
- continue;
-#endif
- /* ... to our variable... */
- if (gimple_get_lhs(stmt) != var)
- continue;
- /* if it's an initializer then we're good */
- if (TREE_CODE(rhs1) == CONSTRUCTOR)
- return;
- }
-
- /* these aren't the 0days you're looking for */
- if (verbose)
- inform(DECL_SOURCE_LOCATION(var),
- "userspace variable will be forcibly initialized");
-
- /* build the initializer expression */
- initializer = build_constructor(TREE_TYPE(var), NULL);
-
- /* build the initializer stmt */
- init_stmt = gimple_build_assign(var, initializer);
- gsi = gsi_after_labels(single_succ(ENTRY_BLOCK_PTR_FOR_FN(cfun)));
- gsi_insert_before(&gsi, init_stmt, GSI_NEW_STMT);
- update_stmt(init_stmt);
-}
-
-static unsigned int structleak_execute(void)
-{
- basic_block bb;
- unsigned int ret = 0;
- tree var;
- unsigned int i;
-
- /* split the first bb where we can put the forced initializers */
- gcc_assert(single_succ_p(ENTRY_BLOCK_PTR_FOR_FN(cfun)));
- bb = single_succ(ENTRY_BLOCK_PTR_FOR_FN(cfun));
- if (!single_pred_p(bb)) {
- split_edge(single_succ_edge(ENTRY_BLOCK_PTR_FOR_FN(cfun)));
- gcc_assert(single_succ_p(ENTRY_BLOCK_PTR_FOR_FN(cfun)));
- }
-
- /* enumerate all local variables and forcibly initialize our targets */
- FOR_EACH_LOCAL_DECL(cfun, i, var) {
- tree type = TREE_TYPE(var);
-
- gcc_assert(DECL_P(var));
- if (!auto_var_in_fn_p(var, current_function_decl))
- continue;
-
- /* only care about structure types */
- if (TREE_CODE(type) != RECORD_TYPE && TREE_CODE(type) != UNION_TYPE)
- continue;
-
- /* if the type is of interest, examine the variable */
- if (TYPE_USERSPACE(type))
- initialize(var);
- }
-
- return ret;
-}
-
-#define PASS_NAME structleak
-#define NO_GATE
-#define PROPERTIES_REQUIRED PROP_cfg
-#define TODO_FLAGS_FINISH TODO_verify_il | TODO_verify_ssa | TODO_verify_stmts | TODO_dump_func | TODO_remove_unused_locals | TODO_update_ssa | TODO_ggc_collect | TODO_verify_flow
-#include "gcc-generate-gimple-pass.h"
-
-__visible int plugin_init(struct plugin_name_args *plugin_info, struct plugin_gcc_version *version)
-{
- int i;
- const char * const plugin_name = plugin_info->base_name;
- const int argc = plugin_info->argc;
- const struct plugin_argument * const argv = plugin_info->argv;
- bool enable = true;
-
- PASS_INFO(structleak, "early_optimizations", 1, PASS_POS_INSERT_BEFORE);
-
- if (!plugin_default_version_check(version, &gcc_version)) {
- error(G_("incompatible gcc/plugin versions"));
- return 1;
- }
-
- if (strncmp(lang_hooks.name, "GNU C", 5) && !strncmp(lang_hooks.name, "GNU C+", 6)) {
- inform(UNKNOWN_LOCATION, G_("%s supports C only, not %s"), plugin_name, lang_hooks.name);
- enable = false;
- }
-
- for (i = 0; i < argc; ++i) {
- if (!strcmp(argv[i].key, "disable")) {
- enable = false;
- continue;
- }
- if (!strcmp(argv[i].key, "verbose")) {
- verbose = true;
- continue;
- }
- error(G_("unknown option '-fplugin-arg-%s-%s'"), plugin_name, argv[i].key);
- }
-
- register_callback(plugin_name, PLUGIN_INFO, NULL, &structleak_plugin_info);
- if (enable) {
- register_callback(plugin_name, PLUGIN_PASS_MANAGER_SETUP, NULL, &structleak_pass_info);
- register_callback(plugin_name, PLUGIN_FINISH_TYPE, finish_type, NULL);
- }
- register_callback(plugin_name, PLUGIN_ATTRIBUTES, register_attributes, NULL);
-
- return 0;
-}
generated by cgit (git 2.34.1) at 2025-12-22 10:51:12 +0000