[PATCH] binutils/objcopy: keep relocation while renaming a section with explicit flags

[Patrick Monnerat <patrick@monnerat.net>]

When explicit flags are listed in a --rename-section option, they
override the input section's flags.
There is no way to list the "reloc" flag explicitly, thus the original
one must be kept. Failure to do so causes the section's relocation to
be dropped.
This patch merges the original SEC_RELOC flag within the renamed section
flags. It also introduces a test case for it.
---
 binutils/objcopy.c                                  |  1 +
 binutils/testsuite/binutils-all/objcopy.exp         |  2 ++
 binutils/testsuite/binutils-all/rename-section-01.d | 12 ++++++++++++
 3 files changed, 15 insertions(+)
 create mode 100644 binutils/testsuite/binutils-all/rename-section-01.d

diff --git a/binutils/objcopy.c b/binutils/objcopy.c
index d886e3ae343..f195e4d875e 100644
--- a/binutils/objcopy.c
+++ b/binutils/objcopy.c
@@ -4052,6 +4052,7 @@ setup_section (bfd *ibfd, sec_ptr isection, void *obfdarg)
   if (new_name != name)
     {
       name = new_name;
+      flags |= bfd_section_flags (isection) & SEC_RELOC;
       flags = check_new_section_flags (flags, obfd, name);
     }
 
diff --git a/binutils/testsuite/binutils-all/objcopy.exp b/binutils/testsuite/binutils-all/objcopy.exp
index 5871d431eea..aebfdb2090b 100644
--- a/binutils/testsuite/binutils-all/objcopy.exp
+++ b/binutils/testsuite/binutils-all/objcopy.exp
@@ -1448,3 +1448,5 @@ if { [istarget *-*-cygwin] || [istarget *-*-mingw*] } {
 if { ![is_xcoff_format] } {
     objcopy_test "pr25662" $src executable "" $ldflags
 }
+
+run_dump_test "rename-section-01"
diff --git a/binutils/testsuite/binutils-all/rename-section-01.d b/binutils/testsuite/binutils-all/rename-section-01.d
new file mode 100644
index 00000000000..b0282fc9552
--- /dev/null
+++ b/binutils/testsuite/binutils-all/rename-section-01.d
@@ -0,0 +1,12 @@
+#PROG: objcopy
+#name: objcopy rename-section with flags - keep relocation
+#source: needed-by-reloc.s
+#objcopy: --rename-section .data=rodata,contents,alloc,load,readonly
+#objdump: -r
+
+.*: +file format .*
+
+RELOCATION RECORDS FOR \[rodata\]:
+OFFSET +TYPE +VALUE
+0+ +[^ ]+ +foo
+
-- 
2.38.1