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authorSzabolcs Nagy <szabolcs.nagy@arm.com>2020-04-01 16:02:03 +0100
committerSzabolcs Nagy <szabolcs.nagy@arm.com>2020-07-08 15:02:37 +0100
commitdbfefbdc3aeec88868cb9d46267f91dc62461226 (patch)
treeee69c971d16859e40761c09fdbad37c7de6df88f /csu
parentc7aa8596de86fb667914ccb95c10495ad056ff96 (diff)
downloadglibc-dbfefbdc3aeec88868cb9d46267f91dc62461226.tar.gz
glibc-dbfefbdc3aeec88868cb9d46267f91dc62461226.tar.xz
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Rewrite abi-note.S in C.
Using C code allows the compiler to add target specific object file
markings based on CFLAGS.

The arm specific abi-note.S is removed and similar object file fix
up will be avoided on AArch64 with standard branch protection.
Diffstat (limited to 'csu')
-rw-r--r--csu/abi-note.c (renamed from csu/abi-note.S)25
1 files changed, 15 insertions, 10 deletions
diff --git a/csu/abi-note.S b/csu/abi-note.c
index 2b4b5f8824..8febf4cac0 100644
--- a/csu/abi-note.S
+++ b/csu/abi-note.c
@@ -53,6 +53,8 @@ offset	length	contents
    identify the earliest release of that OS that supports this ABI.
    See abi-tags (top level) for details. */
 
+#include <link.h>
+#include <stdint.h>
 #include <config.h>
 #include <abi-tag.h>		/* OS-specific ABI tag value */
 
@@ -60,13 +62,16 @@ offset	length	contents
    name begins with `.note' and creates a PT_NOTE program header entry
    pointing at it. */
 
-	.section ".note.ABI-tag", "a"
-	.p2align 2
-	.long 1f - 0f		/* name length */
-	.long 3f - 2f		/* data length */
-	.long  1		/* note type */
-0:	.asciz "GNU"		/* vendor name */
-1:	.p2align 2
-2:	.long __ABI_TAG_OS	/* note data: the ABI tag */
-	.long __ABI_TAG_VERSION
-3:	.p2align 2		/* pad out section */
+__attribute__ ((used, aligned (4), section (".note.ABI-tag")))
+static const struct
+{
+  ElfW(Nhdr) nhdr;
+  char name[4];
+  int32_t desc[4];
+} __abi_tag = {
+  { .n_namesz = sizeof __abi_tag.name,
+    .n_descsz = sizeof __abi_tag.desc,
+    .n_type = 1 },
+  "GNU",
+  { __ABI_TAG_OS, __ABI_TAG_VERSION }
+};