RISC-V: Disallow output format changes.

	PR 22920
	* emultempl/riscvelf.em (riscv_create_output_section_statements): New.
	(LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS): New.
	* testsuite/ld-elf/pr21884.d (#notarget): Add riscv*-*-*.
	* testsuite/ld-unique/pr21529.d (#notarget): Likewise.
	* testsuite/ld-srec/srec.exp (run_srec_test): For riscv*-*-* target,
	call setup_xfail.

1 files changed, 20 insertions, 0 deletions

diff --git a/ld/emultempl/riscvelf.em b/ld/emultempl/riscvelf.em
index a284c63..eaaf4c5 100644
--- a/ld/emultempl/riscvelf.em
+++ b/ld/emultempl/riscvelf.em
@@ -62,7 +62,27 @@ gld${EMULATION_NAME}_after_allocation (void)
   gld${EMULATION_NAME}_map_segments (need_layout);
 }
 
+/* This is a convenient point to tell BFD about target specific flags.
+   After the output has been created, but before inputs are read.  */
+
+static void
+riscv_create_output_section_statements (void)
+{
+  /* See PR 22920 for an example of why this is necessary.  */
+  if (strstr (bfd_get_target (link_info.output_bfd), "riscv") == NULL)
+    {
+      /* The RISC-V backend needs special fields in the output hash structure.
+	 These will only be created if the output format is a RISC-V format,
+	 hence we do not support linking and changing output formats at the
+	 same time.  Use a link followed by objcopy to change output formats.  */
+      einfo (_("%F%P: error: cannot change output format"
+	       " whilst linking %s binaries\n"), "RISC-V");
+      return;
+    }
+}
+
 EOF
 
 LDEMUL_BEFORE_ALLOCATION=riscv_elf_before_allocation
 LDEMUL_AFTER_ALLOCATION=gld${EMULATION_NAME}_after_allocation
+LDEMUL_CREATE_OUTPUT_SECTION_STATEMENTS=riscv_create_output_section_statements