PR 28447: implement multiple parameters for .file on XCOFF

On XCOFF, ".file" pseudo-op allows 3 extras parameters to provide
additional information to AIX linker, or its debugger. These are
stored in auxiliary entries of the C_FILE symbol.

bfd/
	PR 28447
	* coffcode.h (combined_entry_type): Add extrap field.
	(coff_bigobj_swap_aux_in): Adjust names of x_file fields.
	(coff_bigobj_swap_aux_out): Likewise.
	* coffgen.c (coff_write_auxent_fname): New function.
	(coff_fix_symbol_name): Write x_file using
	 coff_write_auxent_fname.
	(coff_write_symbol): Likewise.
	(coff_write_symbols): Add C_FILE auxiliary entries to
	string table if needed.
	(coff_get_normalized_symtab): Adjust names of x_file fields.
	Normalize C_FILE auxiliary entries.
	(coff_print_symbol): Print C_FILE auxiliary entries.
	* coff-rs6000.c (_bfd_xcoff_swap_aux_in): Adjust names of
	x_file fields.
	(_bfd_xcoff_swap_aux_out): Likewise.
	* coff64-rs6000.c (_bfd_xcoff64_swap_aux_in): Likewise.
	(_bfd_xcoff64_swap_aux_out): Likewise.
	* cofflink.c (_bfd_coff_final_link): Likewise.
	(_bfd_coff_link_input_bfd): Likewise.
	* coffswap.h (coff_swap_aux_in): Likewise.
	* peXXigen.c (_bfd_XXi_swap_aux_in): Likewise.
	(_bfd_XXi_swap_aux_out): Likewise.
	* xcofflink.c (xcoff_link_input_bfd): Likewise.
	* libcoff.h: Regenerate.
gas/
	* config/tc-ppc.c (ppc_file): New function.
	* config/tc-ppc.h (OBJ_COFF_MAX_AUXENTRIES): Change to 4.
	* testsuite/gas/ppc/aix.exp: Add tests.
	* testsuite/gas/ppc/xcoff-file-32.d: New test.
	* testsuite/gas/ppc/xcoff-file-64.d: New test.
	* testsuite/gas/ppc/xcoff-file.s: New test.
include/
	* coff/internal.h (union internal_auxent): Change x_file to be a
	  struct instead of a union. Add x_ftype field.
	* coff/rs6000.h (union external_auxent): Add x_resv field.
	* coff/xcoff.h (XFT_FN): New define.
	(XFT_CT): Likewise.
	(XFT_CV): Likewise.
	(XFT_CD): Likewise.

3 files changed, 21 insertions, 11 deletions

diff --git a/include/coff/internal.h b/include/coff/internal.h
index 8d757ac..d01af73 100644
--- a/include/coff/internal.h
+++ b/include/coff/internal.h
@@ -578,18 +578,21 @@ union internal_auxent
     unsigned short x_tvndx;	/* tv index */
   }      x_sym;
 
-  union
+  struct
   {
-    /* PR 17754: We use to FILNMLEN for the size of the x_fname
-       array, but that causes problems as PE targets use a larger
-       value.  We cannot use their definition of E_FILNMLEN as this
-       header can be used without including any PE headers.  */
-    char x_fname[20];
-    struct
-    {
-      long x_zeroes;
-      long x_offset;
-    }      x_n;
+    union {
+      /* PR 17754: We use to FILNMLEN for the size of the x_fname
+	 array, but that causes problems as PE targets use a larger
+	 value.  We cannot use their definition of E_FILNMLEN as this
+	 header can be used without including any PE headers.  */
+      char x_fname[20];
+      struct
+      {
+	long x_zeroes;
+	long x_offset;
+      }      x_n;
+    } x_n;
+    unsigned char x_ftype;
   }     x_file;
 
   struct
diff --git a/include/coff/rs6000.h b/include/coff/rs6000.h
index e60efff..fd3f01d 100644
--- a/include/coff/rs6000.h
+++ b/include/coff/rs6000.h
@@ -176,6 +176,7 @@ union external_auxent {
       } x_n;
     } x_n;
     char x_ftype[1];
+    char x_resv[3];
   } x_file;
 
   struct {
diff --git a/include/coff/xcoff.h b/include/coff/xcoff.h
index 2b61545..1cff7dc 100644
--- a/include/coff/xcoff.h
+++ b/include/coff/xcoff.h
@@ -190,6 +190,12 @@
 #define XMC_UL     21          /* Read-write uninitialized TLS data */
 #define XMC_TE     22          /* Same as XMC_TC but mapped after it */
 
+/* x_ftype values:  */
+#define XFT_FN 0    /* Specifies the source-file name */
+#define XFT_CT 1    /* Specifies the compiler time stamp */
+#define XFT_CV 2    /* Specifies the compiler version number */
+#define XFT_CD 128  /*Specifies compiler-defined information */
+
 /* The ldhdr structure.  This appears at the start of the .loader
    section.  */