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| author | Sriraman Tallam <tmsriram@google.com> | 2015-06-04 21:14:10 +0000 |
|---|---|---|
| committer | Sriraman Tallam <tmsriram@gcc.gnu.org> | 2015-06-04 21:14:10 +0000 |
| commit | 4bb794e25d5e141fd57fd206c276d04d93e25e4a (patch) | |
| tree | 6b25a7412ce088321aa5a46c7d80ebb9b7e8b619 /gcc/c-family | |
| parent | 172f0ce5ab5fa74a5695cf855c9ba7c4e98c754a (diff) | |
| download | gcc-4bb794e25d5e141fd57fd206c276d04d93e25e4a.zip gcc-4bb794e25d5e141fd57fd206c276d04d93e25e4a.tar.gz gcc-4bb794e25d5e141fd57fd206c276d04d93e25e4a.tar.bz2 | |
c-common.c (noplt): New attribute.
2015-06-04 Sriraman Tallam <tmsriram@google.com>
* c-family/c-common.c (noplt): New attribute.
(handle_noplt_attribute): New handler.
* calls.c (prepare_call_address): Check for noplt
attribute.
* config/i386/i386.c (ix86_expand_call): Check
for noplt attribute.
(ix86_nopic_noplt_attribute_p): New function.
(ix86_output_call_insn): Output indirect call for non-pic
no plt calls.
* doc/extend.texi (noplt): Document new attribute.
* doc/invoke.texi: Document new attribute.
* testsuite/gcc.target/i386/noplt-1.c: New test.
* testsuite/gcc.target/i386/noplt-2.c: New test.
* testsuite/gcc.target/i386/noplt-3.c: New test.
* testsuite/gcc.target/i386/noplt-4.c: New test.
This patch does two things:
* Adds new generic function attribute "noplt" that is similar in functionality
to -fno-plt except that it applies only to calls to functions that are marked
with this attribute.
* For x86_64, it makes -fno-plt(and the attribute) also work for non-PIC code by
directly generating an indirect call via a GOT entry.
From-SVN: r224138
Diffstat (limited to 'gcc/c-family')
| -rw-r--r-- | gcc/c-family/c-common.c | 22 |
1 files changed, 22 insertions, 0 deletions
diff --git a/gcc/c-family/c-common.c b/gcc/c-family/c-common.c index 8528fe4..6f4393b 100644 --- a/gcc/c-family/c-common.c +++ b/gcc/c-family/c-common.c @@ -356,6 +356,7 @@ static tree handle_mode_attribute (tree *, tree, tree, int, bool *); static tree handle_section_attribute (tree *, tree, tree, int, bool *); static tree handle_aligned_attribute (tree *, tree, tree, int, bool *); static tree handle_weak_attribute (tree *, tree, tree, int, bool *) ; +static tree handle_noplt_attribute (tree *, tree, tree, int, bool *) ; static tree handle_alias_ifunc_attribute (bool, tree *, tree, tree, bool *); static tree handle_ifunc_attribute (tree *, tree, tree, int, bool *); static tree handle_alias_attribute (tree *, tree, tree, int, bool *); @@ -705,6 +706,8 @@ const struct attribute_spec c_common_attribute_table[] = handle_aligned_attribute, false }, { "weak", 0, 0, true, false, false, handle_weak_attribute, false }, + { "noplt", 0, 0, true, false, false, + handle_noplt_attribute, false }, { "ifunc", 1, 1, true, false, false, handle_ifunc_attribute, false }, { "alias", 1, 1, true, false, false, @@ -8184,6 +8187,25 @@ handle_weak_attribute (tree *node, tree name, return NULL_TREE; } +/* Handle a "noplt" attribute; arguments as in + struct attribute_spec.handler. */ + +static tree +handle_noplt_attribute (tree *node, tree name, + tree ARG_UNUSED (args), + int ARG_UNUSED (flags), + bool * ARG_UNUSED (no_add_attrs)) +{ + if (TREE_CODE (*node) != FUNCTION_DECL) + { + warning (OPT_Wattributes, + "%qE attribute is only applicable on functions", name); + *no_add_attrs = true; + return NULL_TREE; + } + return NULL_TREE; +} + /* Handle an "alias" or "ifunc" attribute; arguments as in struct attribute_spec.handler, except that IS_ALIAS tells us whether this is an alias as opposed to ifunc attribute. */ |