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.

diff --git a/ChangeLog b/ChangeLog
index 62687bbea921bb83f7427ceabf482173da0e0b9f..d3d725785451bb79fa279308432ddfd50b435753 100644 (file)
--- 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 7e2b072a7f75451c0faeb47013b6b93c2fc575a2..74f7f479ce817040af3c95c2f0cdf34034476449 100644 (file)
--- 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 */