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| author | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2020-04-01 16:02:03 +0100 |
|---|---|---|
| committer | Szabolcs Nagy <szabolcs.nagy@arm.com> | 2020-07-08 15:02:37 +0100 |
| commit | dbfefbdc3aeec88868cb9d46267f91dc62461226 (patch) | |
| tree | ee69c971d16859e40761c09fdbad37c7de6df88f | |
| parent | c7aa8596de86fb667914ccb95c10495ad056ff96 (diff) | |
| download | glibc-dbfefbdc3aeec88868cb9d46267f91dc62461226.zip glibc-dbfefbdc3aeec88868cb9d46267f91dc62461226.tar.gz glibc-dbfefbdc3aeec88868cb9d46267f91dc62461226.tar.bz2 | |
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.
| -rw-r--r-- | csu/abi-note.c (renamed from csu/abi-note.S) | 25 | ||||
| -rw-r--r-- | sysdeps/arm/abi-note.S | 8 |
2 files changed, 15 insertions, 18 deletions
diff --git a/csu/abi-note.S b/csu/abi-note.c index 2b4b5f8..8febf4c 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 } +}; diff --git a/sysdeps/arm/abi-note.S b/sysdeps/arm/abi-note.S deleted file mode 100644 index 07bd4c4..0000000 --- a/sysdeps/arm/abi-note.S +++ /dev/null @@ -1,8 +0,0 @@ -/* Tag_ABI_align8_preserved: This code preserves 8-byte - alignment in any callee. */ - .eabi_attribute 25, 1 -/* Tag_ABI_align8_needed: This code may require 8-byte alignment from - the caller. */ - .eabi_attribute 24, 1 - -#include <csu/abi-note.S> |