x86: Fix call64's section flags

When a section is not flagged with SHF_ALLOC, LLD's --gc-sections
algorithm fails to visit the sections that it references. As a result of
this, LLD was dropping the call64.o(.data) section, which is itself only
referenced by .text_call64.

This appears to be a bug in LLD, but the .section directive for
.text_call64 should really have the correct flags either way.

Add `"ax"` to mark the section as ALLOC ("supposed to be loaded") and
CODE ("supposed to be executed").

Fixes: 7dc82591d68e2a ("x86: Move call64 into its own section")
Signed-off-by: Sam Edwards <CFSworks@gmail.com>

diff --git a/arch/x86/cpu/i386/call64.S b/arch/x86/cpu/i386/call64.S
index d81bcc6..424732f 100644 (file)
--- a/arch/x86/cpu/i386/call64.S
+++ b/arch/x86/cpu/i386/call64.S
@@ -10,7 +10,7 @@
 #include <asm/processor-flags.h>
 
 .code32
-.section .text_call64
+.section .text_call64, "ax"
 .globl cpu_call64
 cpu_call64:
        /*