AArch64: Revert SEC_LINKER_CREATED for AArch64 stubs (PR/25210)

The SEC_LINKER_CREATED flag was added as a fix for PR 24753.  I believe that
part of the fix in compress.c to still be correct as linker created sections
don't have a size on disk and it fixes the Arm bootstrap regression.

So I'm partially revert this change so that we don't have to manage the section
manually as implied by SEC_LINKER_CREATED as it's causing an error when both
errata workarounds are used together and it wasn't needed.  This can also be
seen from that the arm bootstrap was fixed and no flag was added to it's stubs.

ld/ChangeLog:

	PR 25210
	PR 24753
	* emultempl/aarch64elf.em (elf${ELFSIZE}_aarch64_add_stub_section):
	Remove SEC_LINKER_CREATED.
	* testsuite/ld-aarch64/aarch64-elf.exp: Add erratum835769-843419.
	* testsuite/ld-aarch64/erratum835769-843419.d: New test.

(cherry picked from commit 0db131fb835e4c4f6a024e86743467e7e01c965e)

Signed-off-by: Tamar Christina <tamar.christina@arm.com>

4 files changed, 68 insertions, 1 deletions

diff --git a/ld/ChangeLog b/ld/ChangeLog
index c4cc2b05422..3d474a866bb 100644
--- a/ld/ChangeLog
+++ b/ld/ChangeLog
@@ -1,3 +1,15 @@
+2020-01-15  Tamar Christina  <tamar.christina@arm.com>
+
+	Backport from master.
+	2020-01-02  Tamar Christina  <tamar.christina@arm.com>
+
+	PR 25210
+	PR 24753
+	* emultempl/aarch64elf.em (elf${ELFSIZE}_aarch64_add_stub_section):
+	Remove SEC_LINKER_CREATED.
+	* testsuite/ld-aarch64/aarch64-elf.exp: Add erratum835769-843419.
+	* testsuite/ld-aarch64/erratum835769-843419.d: New test.
+
 2020-01-15  Alan Modra  <amodra@gmail.com>
 
 	* testsuite/ld-powerpc/ambiguousv1b.d: Adjust expected output.
diff --git a/ld/emultempl/aarch64elf.em b/ld/emultempl/aarch64elf.em
index 93f60a9b613..4c13f26f4e1 100644
--- a/ld/emultempl/aarch64elf.em
+++ b/ld/emultempl/aarch64elf.em
@@ -169,7 +169,7 @@ elf${ELFSIZE}_aarch64_add_stub_section (const char *stub_sec_name,
   lang_output_section_statement_type *os;
   struct hook_stub_info info;
 
-  flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE | SEC_LINKER_CREATED
+  flags = (SEC_ALLOC | SEC_LOAD | SEC_READONLY | SEC_CODE
 	   | SEC_HAS_CONTENTS | SEC_RELOC | SEC_IN_MEMORY | SEC_KEEP);
   stub_sec = bfd_make_section_anyway_with_flags (stub_file->the_bfd,
 						 stub_sec_name, flags);
diff --git a/ld/testsuite/ld-aarch64/aarch64-elf.exp b/ld/testsuite/ld-aarch64/aarch64-elf.exp
index 631fde0f310..d02bc250915 100644
--- a/ld/testsuite/ld-aarch64/aarch64-elf.exp
+++ b/ld/testsuite/ld-aarch64/aarch64-elf.exp
@@ -93,6 +93,7 @@ run_dump_test "erratum843419-far-adr"
 run_dump_test "erratum843419-far-full"
 run_dump_test "erratum843419-full"
 run_dump_test "erratum843419-no-args"
+run_dump_test "erratum835769-843419"
 
 # Relocation Tests
 run_dump_test_lp64 "weak-undefined"
diff --git a/ld/testsuite/ld-aarch64/erratum835769-843419.d b/ld/testsuite/ld-aarch64/erratum835769-843419.d
new file mode 100644
index 00000000000..728765f61d0
--- /dev/null
+++ b/ld/testsuite/ld-aarch64/erratum835769-843419.d
@@ -0,0 +1,54 @@
+#source: erratum835769.s
+#as:
+#ld: --fix-cortex-a53-835769 --fix-cortex-a53-843419=full -e0x400000
+#objdump: -dr
+#...
+Disassembly of section .text:
+#...
+[0-9a-f]+ <a1ldr>:
+[ \t0-9a-f]+:[ \t]+b8408c87[ \t]+ldr[ \t]+w7, \[x4, #8\]\!
+[ \t0-9a-f]+:[ \t]+1b017c06[ \t]+mul[ \t]+w6, w0, w1
+[ \t0-9a-f]+:[ \t]+f9400084[ \t]+ldr[ \t]+x4, \[x4\]
+[ \t0-9a-f]+:[ \t0-9a-z]+[ \t]+b[ \t]+[0-9a-f]+ <__erratum_835769_veneer_0>
+[ \t0-9a-f]+:[ \t]+aa0503e0[ \t]+mov[ \t]+x0, x5
+[ \t0-9a-f]+:[ \t]+d65f03c0[ \t]+ret
+
+[0-9a-f]+ <a5ldr>:
+[ \t0-9a-f]+:[ \t]+b8408c87[ \t]+ldr[ \t]+w7, \[x4, #8\]!
+[ \t0-9a-f]+:[ \t]+1b017c06[ \t]+mul[ \t]+w6, w0, w1
+[ \t0-9a-f]+:[ \t]+f9400084[ \t]+ldr[ \t]+x4, \[x4\]
+[ \t0-9a-f]+:[ \t0-9a-z]+[ \t]+b[ \t]+[0-9a-f]+ <__erratum_835769_veneer_1>
+[ \t0-9a-f]+:[ \t]+aa0503e0[ \t]+mov[ \t]+x0, x5
+[ \t0-9a-f]+:[ \t]+d65f03c0[ \t]+ret
+
+[0-9a-f]+ <a6ldr>:
+[ \t0-9a-f]+:[ \t]+b8408c87[ \t]+ldr[ \t]+w7, \[x4, #8\]!
+[ \t0-9a-f]+:[ \t]+1b017c06[ \t]+mul[ \t]+w6, w0, w1
+[ \t0-9a-f]+:[ \t]+f9400084[ \t]+ldr[ \t]+x4, \[x4\]
+[ \t0-9a-f]+:[ \t]+9b031885[ \t]+madd[ \t]+x5, x4, x3, x6
+[ \t0-9a-f]+:[ \t]+aa0503e0[ \t]+mov[ \t]+x0, x5
+[ \t0-9a-f]+:[ \t]+d65f03c0[ \t]+ret
+
+[0-9a-f]+ <a7str>:
+[ \t0-9a-f]+:[ \t]+b8408c87[ \t]+ldr[ \t]+w7, \[x4, #8\]!
+[ \t0-9a-f]+:[ \t]+1b017c06[ \t]+mul[ \t]+w6, w0, w1
+[ \t0-9a-f]+:[ \t]+f9000084[ \t]+str[ \t]+x4, \[x4\]
+[ \t0-9a-f]+:[ \t0-9a-z]+[ \t]+b[ \t]+[0-9a-f]+ <__erratum_835769_veneer_2>
+[ \t0-9a-f]+:[ \t]+aa0503e0[ \t]+mov[ \t]+x0, x5
+[ \t0-9a-f]+:[ \t]+d65f03c0[ \t]+ret
+
+[ \t0-9a-f]+:[ \t]+d503201f[ \t]+nop
+[ \t0-9a-f]+:[ \t]+14000400[ \t]+b[ \t]+[0-9a-f]+ <__erratum_835769_veneer_0\+0xfe8>
+[ \t0-9a-f]+:[ \t]+d503201f[ \t]+nop
+[0-9a-f]+ <__erratum_835769_veneer_2>:
+[ \t0-9a-f]+:[ \t]+9b031885[ \t]+madd[ \t]+x5, x4, x3, x6
+[ \t0-9a-f]+:[ \t0-9a-z]+[ \t]+b[ \t]+[0-9a-f]+ <a7str\+0x[0-9a-f]+>
+
+[0-9a-f]+ <__erratum_835769_veneer_1>:
+[ \t0-9a-f]+:[ \t]+9ba31845[ \t]+umaddl[ \t]+x5, w2, w3, x6
+[ \t0-9a-f]+:[ \t0-9a-z]+[ \t]+b[ \t]+[0-9a-f]+ <a5ldr\+0x[0-9a-f]+>
+
+[0-9a-f]+ <__erratum_835769_veneer_0>:
+[ \t0-9a-f]+:[ \t]+9b031845[ \t]+madd[ \t]+x5, x2, x3, x6
+[ \t0-9a-f]+:[ \t0-9a-z]+[ \t]+b[ \t]+[0-9a-f]+ <a1ldr\+0x[0-9a-f]+>
+#pass