From: Szabolcs Nagy <Szabolcs.Nagy@arm.com>
To: "libc-stable@sourceware.org" <libc-stable@sourceware.org>
Cc: nd <nd@arm.com>
Subject: [COMMITTED 2.28] aarch64: add STO_AARCH64_VARIANT_PCS and DT_AARCH64_VARIANT_PCS
Date: Tue, 01 Jan 2019 00:00:00 -0000 [thread overview]
Message-ID: <f25879df-659d-4d8d-6763-e9c6a200bc9c@arm.com> (raw)
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From b95c8a3150be0c3ae9984e2c473212e5be30ccf5 Mon Sep 17 00:00:00 2001
From: Szabolcs Nagy <szabolcs.nagy@arm.com>
Date: Thu, 25 Apr 2019 15:35:35 +0100
Subject: [PATCH 1/2] aarch64: add STO_AARCH64_VARIANT_PCS and
DT_AARCH64_VARIANT_PCS
STO_AARCH64_VARIANT_PCS is a non-visibility st_other flag for marking
symbols that reference functions that may follow a variant PCS with
different register usage convention from the base PCS.
DT_AARCH64_VARIANT_PCS is a dynamic tag that marks ELF modules that
have R_*_JUMP_SLOT relocations for symbols marked with
STO_AARCH64_VARIANT_PCS (i.e. have variant PCS calls via a PLT).
* elf/elf.h (STO_AARCH64_VARIANT_PCS): Define.
(DT_AARCH64_VARIANT_PCS): Define.
---
ChangeLog | 5 +++++
elf/elf.h | 7 +++++++
2 files changed, 12 insertions(+)
diff --git a/ChangeLog b/ChangeLog
index 62687bbea9..d3d7257854 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,8 @@
+2019-06-13 Szabolcs Nagy <szabolcs.nagy@arm.com>
+
+ * elf/elf.h (STO_AARCH64_VARIANT_PCS): Define.
+ (DT_AARCH64_VARIANT_PCS): Define.
+
2019-06-28 Florian Weimer <fweimer@redhat.com>
[BZ #24744]
diff --git a/elf/elf.h b/elf/elf.h
index 7e2b072a7f..74f7f479ce 100644
--- a/elf/elf.h
+++ b/elf/elf.h
@@ -2847,6 +2847,13 @@ enum
#define R_AARCH64_TLSDESC 1031 /* TLS Descriptor. */
#define R_AARCH64_IRELATIVE 1032 /* STT_GNU_IFUNC relocation. */
+/* AArch64 specific values for the Dyn d_tag field. */
+#define DT_AARCH64_VARIANT_PCS (DT_LOPROC + 5)
+#define DT_AARCH64_NUM 6
+
+/* AArch64 specific values for the st_other field. */
+#define STO_AARCH64_VARIANT_PCS 0x80
+
/* ARM relocs. */
#define R_ARM_NONE 0 /* No reloc */
--
2.17.1
reply other threads:[~2019-07-12 12:46 UTC|newest]
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