aarch64: Mark purecap object files with EF_AARCH64_CHERI_PURECAP

This simple patch sets the ELF header flag EF_AARCH64_CHERI_PURECAP for
purecap Morello object files, as documented in aaelf64-morello:
https://github.com/ARM-software/abi-aa/blob/main/aaelf64-morello/aaelf64-morello.rst

gas/ChangeLog:

2021-09-24  Alex Coplan  <alex.coplan@arm.com>

	* config/tc-aarch64.c (md_begin): Set the ELF header flag
	EF_AARCH64_CHERI_PURECAP if we have the C64 extension.

diff --git a/gas/ChangeLog b/gas/ChangeLog
index 2e32439c824509816b5a08d4acbfcba4cf918b89..00c4e8a1ef281706a4b5be9ccb46ab4ef3f842c7 100644 (file)
--- a/gas/ChangeLog
+++ b/gas/ChangeLog
@@ -1,3 +1,8 @@
+2021-09-24  Alex Coplan  <alex.coplan@arm.com>
+
+       * config/tc-aarch64.c (md_begin): Set the ELF header flag
+       EF_AARCH64_CHERI_PURECAP if we have the C64 extension.
+
 2021-09-24  Alex Coplan  <alex.coplan@arm.com>
 
        * testsuite/gas/aarch64/morello_ldst-c64.d: Update following

diff --git a/gas/config/tc-aarch64.c b/gas/config/tc-aarch64.c
index bde631d92b74bdbdf1bbdccda295c93c10248309..95a050cac598ec7f0910fafb095b7d378301de63 100644 (file)
--- a/gas/config/tc-aarch64.c
+++ b/gas/config/tc-aarch64.c
@@ -10325,6 +10325,11 @@ md_begin (void)
   mach = ilp32_p ? bfd_mach_aarch64_ilp32 : bfd_mach_aarch64;
 
   bfd_set_arch_mach (stdoutput, TARGET_ARCH, mach);
+
+#ifdef OBJ_ELF
+  if (IS_C64)
+    bfd_set_private_flags (stdoutput, EF_AARCH64_CHERI_PURECAP);
+#endif
 }
 
 /* Command line processing.  */