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| author | Martin Liska <mliska@suse.cz> | 2020-05-15 14:42:12 +0200 |
|---|---|---|
| committer | Martin Liska <mliska@suse.cz> | 2020-10-22 10:10:50 +0200 |
| commit | 346b302d09c1e6db56d9fe69048acb32fbb97845 (patch) | |
| tree | dc5b9b9594325c30b81f676d19c75dbc3a34343f /gcc/c-family/c-attribs.c | |
| parent | 5a99796b85c93fe9d61ee52fc3a38b8698709479 (diff) | |
| download | gcc-346b302d09c1e6db56d9fe69048acb32fbb97845.zip gcc-346b302d09c1e6db56d9fe69048acb32fbb97845.tar.gz gcc-346b302d09c1e6db56d9fe69048acb32fbb97845.tar.bz2 | |
Implement no_stack_protector attribute.
gcc/ChangeLog:
2020-05-18 Martin Liska <mliska@suse.cz>
PR c/94722
* cfgexpand.c (stack_protect_decl_phase):
Guard with lookup_attribute("no_stack_protector") at
various places.
(expand_used_vars): Likewise here.
* doc/extend.texi: Document no_stack_protector attribute.
gcc/ada/ChangeLog:
2020-05-18 Martin Liska <mliska@suse.cz>
PR c/94722
* gcc-interface/utils.c (handle_no_stack_protect_attribute):
New.
(handle_stack_protect_attribute): Add error message for a
no_stack_protector function.
gcc/c-family/ChangeLog:
2020-05-18 Martin Liska <mliska@suse.cz>
PR c/94722
* c-attribs.c (handle_no_stack_protect_function_attribute): New.
(handle_stack_protect_attribute): Add error message for a
no_stack_protector function.
gcc/testsuite/ChangeLog:
2020-05-18 Martin Liska <mliska@suse.cz>
PR c/94722
* g++.dg/no-stack-protector-attr-2.C: New test.
* g++.dg/no-stack-protector-attr-3.C: New test.
* g++.dg/no-stack-protector-attr.C: New test.
Diffstat (limited to 'gcc/c-family/c-attribs.c')
| -rw-r--r-- | gcc/c-family/c-attribs.c | 32 |
1 files changed, 31 insertions, 1 deletions
diff --git a/gcc/c-family/c-attribs.c b/gcc/c-family/c-attribs.c index 8283e95..a3b2b3d 100644 --- a/gcc/c-family/c-attribs.c +++ b/gcc/c-family/c-attribs.c @@ -65,6 +65,8 @@ static tree handle_no_sanitize_undefined_attribute (tree *, tree, tree, int, static tree handle_asan_odr_indicator_attribute (tree *, tree, tree, int, bool *); static tree handle_stack_protect_attribute (tree *, tree, tree, int, bool *); +static tree handle_no_stack_protector_function_attribute (tree *, tree, + tree, int, bool *); static tree handle_noinline_attribute (tree *, tree, tree, int, bool *); static tree handle_noclone_attribute (tree *, tree, tree, int, bool *); static tree handle_nocf_check_attribute (tree *, tree, tree, int, bool *); @@ -248,6 +250,14 @@ static const struct attribute_spec::exclusions attr_noinit_exclusions[] = ATTR_EXCL (NULL, false, false, false), }; +static const struct attribute_spec::exclusions attr_stack_protect_exclusions[] = +{ + ATTR_EXCL ("stack_protect", true, false, false), + ATTR_EXCL ("no_stack_protector", true, false, false), + ATTR_EXCL (NULL, false, false, false), +}; + + /* Table of machine-independent attributes common to all C-like languages. Current list of processed common attributes: nonnull. */ @@ -275,7 +285,11 @@ const struct attribute_spec c_common_attribute_table[] = { "volatile", 0, 0, true, false, false, false, handle_noreturn_attribute, NULL }, { "stack_protect", 0, 0, true, false, false, false, - handle_stack_protect_attribute, NULL }, + handle_stack_protect_attribute, + attr_stack_protect_exclusions }, + { "no_stack_protector", 0, 0, true, false, false, false, + handle_no_stack_protector_function_attribute, + attr_stack_protect_exclusions }, { "noinline", 0, 0, true, false, false, false, handle_noinline_attribute, attr_noinline_exclusions }, @@ -1156,6 +1170,22 @@ handle_stack_protect_attribute (tree *node, tree name, tree, int, return NULL_TREE; } +/* Handle a "no_stack_protector" attribute; arguments as in + struct attribute_spec.handler. */ + +static tree +handle_no_stack_protector_function_attribute (tree *node, tree name, tree, + int, bool *no_add_attrs) +{ + if (TREE_CODE (*node) != FUNCTION_DECL) + { + warning (OPT_Wattributes, "%qE attribute ignored", name); + *no_add_attrs = true; + } + + return NULL_TREE; +} + /* Handle a "noipa" attribute; arguments as in struct attribute_spec.handler. */ |