gcc/ChangeLog:
* configure.ac: Add detection of letter y support in assembler.
* config.in: Regenerate.
* configure: Regenerate.
* output.h (SECTION_NOREAD): Add new bit flag.
* varasm.c (default_elf_asm_named_section): Set y letter when we detect
SECTION_NOREAD.
---
gcc/config.in | 6 ++++++
gcc/configure | 34 +++++++++++++++++++++++++++++++++-
gcc/configure.ac | 6 ++++++
gcc/output.h | 3 ++-
gcc/varasm.c | 6 +++++-
5 files changed, 52 insertions(+), 3 deletions(-)
diff --git a/gcc/config.in b/gcc/config.in
index 1796e1d..2aa2d1a 100644
--- a/gcc/config.in
+++ b/gcc/config.in
@@ -1266,6 +1266,12 @@
#endif
+/* Define if your assembler supports specifying the section flag y. */
+#ifndef USED_FOR_TARGET
+#undef HAVE_GAS_SECTION_NOREAD
+#endif
+
+
/* Define 0/1 if your assembler supports marking sections with SHF_MERGE flag.
*/
#ifndef USED_FOR_TARGET
diff --git a/gcc/configure b/gcc/configure
index ff646e8..e543732 100755
--- a/gcc/configure
+++ b/gcc/configure
@@ -22365,7 +22365,6 @@ else
$as_echo "$gcc_cv_readelf" >&6; }
fi
-# Figure out what assembler alignment features are present.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler flags" >&5
$as_echo_n "checking assembler flags... " >&6; }
if test "${gcc_cv_as_flags+set}" = set; then :
@@ -22392,6 +22391,39 @@ fi
{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_flags" >&5
$as_echo "$gcc_cv_as_flags" >&6; }
+{ $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for .section with
y" >&5
+$as_echo_n "checking assembler for .section with y... " >&6; }
+if test "${gcc_cv_as_section_has_y+set}" = set; then :
+ $as_echo_n "(cached) " >&6
+else
+ gcc_cv_as_section_has_y=no
+ if test x$gcc_cv_as != x; then
+ $as_echo '.section foo1,"y"
+.byte 0,0,0,0' > conftest.s
+ if { ac_try='$gcc_cv_as $gcc_cv_as_flags -o conftest.o conftest.s >&5'
+ { { eval echo "\"\$as_me\":${as_lineno-$LINENO}: \"$ac_try\""; } >&5
+ (eval $ac_try) 2>&5
+ ac_status=$?
+ $as_echo "$as_me:${as_lineno-$LINENO}: \$? = $ac_status" >&5
+ test $ac_status = 0; }; }
+ then
+ gcc_cv_as_section_has_y=yes
+ else
+ echo "configure: failed program was" >&5
+ cat conftest.s >&5
+ fi
+ rm -f conftest.o conftest.s
+ fi
+fi
+{ $as_echo "$as_me:${as_lineno-$LINENO}: result: $gcc_cv_as_section_has_y" >&5
+$as_echo "$gcc_cv_as_section_has_y" >&6; }
+if test $gcc_cv_as_section_has_y = yes; then
+
+$as_echo "#define HAVE_GAS_SECTION_NOREAD 1" >>confdefs.h
+
+fi
+
+# Figure out what assembler alignment features are present.
{ $as_echo "$as_me:${as_lineno-$LINENO}: checking assembler for .balign and
.p2align" >&5
$as_echo_n "checking assembler for .balign and .p2align... " >&6; }
if test "${gcc_cv_as_balign_and_p2align+set}" = set; then :
diff --git a/gcc/configure.ac b/gcc/configure.ac
index 4dc7c10..d1717bf 100644
--- a/gcc/configure.ac
+++ b/gcc/configure.ac
@@ -2446,6 +2446,12 @@ else
AC_MSG_RESULT($gcc_cv_readelf)
fi
+gcc_GAS_CHECK_FEATURE([.section with y], gcc_cv_as_section_has_y,,,
+[.section foo1,"y"
+.byte 0,0,0,0],,
+[AC_DEFINE(HAVE_GAS_SECTION_NOREAD, 1,
+ [Define if your assembler supports specifying the section flag y.])])
+
# Figure out what assembler alignment features are present.
gcc_GAS_CHECK_FEATURE([.balign and .p2align], gcc_cv_as_balign_and_p2align,
[2,6,0],,
diff --git a/gcc/output.h b/gcc/output.h
index 0924499..1df3088 100644
--- a/gcc/output.h
+++ b/gcc/output.h
@@ -381,7 +381,8 @@ extern void no_asm_to_stream (FILE *);
#define SECTION_COMMON 0x800000 /* contains common data */
#define SECTION_RELRO 0x1000000 /* data is readonly after relocation
processing */
#define SECTION_EXCLUDE 0x2000000 /* discarded by the linker */
-#define SECTION_MACH_DEP 0x4000000 /* subsequent bits reserved for target
*/
+#define SECTION_NOREAD 0x4000000 /* section cannot be read but can be
executed */
+#define SECTION_MACH_DEP 0x8000000 /* subsequent bits reserved for target
*/
/* This SECTION_STYLE is used for unnamed sections that we can switch
to using a special assembler directive. */
diff --git a/gcc/varasm.c b/gcc/varasm.c
index 3a3573e..c0499b1 100644
--- a/gcc/varasm.c
+++ b/gcc/varasm.c
@@ -6233,7 +6233,7 @@ void
default_elf_asm_named_section (const char *name, unsigned int flags,
tree decl)
{
- char flagchars[10], *f = flagchars;
+ char flagchars[11], *f = flagchars;
/* If we have already declared this section, we can use an
abbreviated form to switch back to it -- unless this section is
@@ -6266,6 +6266,10 @@ default_elf_asm_named_section (const char *name,
unsigned int flags,
*f++ = TLS_SECTION_ASM_FLAG;
if (HAVE_COMDAT_GROUP && (flags & SECTION_LINKONCE))
*f++ = 'G';
+#if defined (HAVE_GAS_SECTION_NOREAD) && HAVE_GAS_SECTION_NOREAD == 1
+ if (flags & SECTION_NOREAD)
+ *f++ = 'y';
+#endif
*f = '\0';
fprintf (asm_out_file, "\t.section\t%s,\"%s\"", name, flagchars);
--
2.7.0.rc3
