LoongArch bfd support

2021-10-22  Chenghua Xu  <xuchenghua@loongson.cn>
	    Zhensong Liu  <liuzhensong@loongson.cn>
	    Weinan Liu  <liuweinan@loongson.cn>
bfd/
	* Makefile.am: Add LoongArch.
	* archures.c: Likewise.
	* config.bfd: Likewise.
	* configure.ac: Likewise.
	* cpu-loongarch.c: New.
	* elf-bfd.h: Add LoongArch.
	* elf.c: Add LoongArch elfcore_grok_xxx.
	* elfnn-loongarch.c: New.
	* elfxx-loongarch.c: New.
	* elfxx-loongarch.h: New.
	* reloc.c: Add LoongArch BFD RELOC ENUM.
	* targets.c: Add LoongArch target.
	* Makefile.in: Regenerate.
	* bfd-in2.h: Regenerate.
	* configure: Regenerate.
	* libbfd.h: Regenerate.
	* po/BLD-POTFILES.in: Regenerate.
	* po/SRC-POTFILES.in: Regenerate.

include/
	* elf/common.h: Add NT_LARCH_{CPUCFG,CSR,LSX,LASX}.
	* elf/loongarch.h: New.

1 files changed, 109 insertions, 0 deletions

diff --git a/bfd/elf.c b/bfd/elf.c
index e8e37ea..cd8280e 100644
--- a/bfd/elf.c
+++ b/bfd/elf.c
@@ -9951,6 +9951,30 @@ elfcore_grok_gdb_tdesc (bfd *abfd, Elf_Internal_Note *note)
   return elfcore_make_note_pseudosection (abfd, ".gdb-tdesc", note);
 }
 
+static bool
+elfcore_grok_loongarch_cpucfg (bfd *abfd, Elf_Internal_Note *note)
+{
+  return elfcore_make_note_pseudosection (abfd, ".reg-loongarch-cpucfg", note);
+}
+
+static bool
+elfcore_grok_loongarch_lbt (bfd *abfd, Elf_Internal_Note *note)
+{
+  return elfcore_make_note_pseudosection (abfd, ".reg-loongarch-lbt", note);
+}
+
+static bool
+elfcore_grok_loongarch_lsx (bfd *abfd, Elf_Internal_Note *note)
+{
+  return elfcore_make_note_pseudosection (abfd, ".reg-loongarch-lsx", note);
+}
+
+static bool
+elfcore_grok_loongarch_lasx (bfd *abfd, Elf_Internal_Note *note)
+{
+  return elfcore_make_note_pseudosection (abfd, ".reg-loongarch-lasx", note);
+}
+
 #if defined (HAVE_PRPSINFO_T)
 typedef prpsinfo_t   elfcore_psinfo_t;
 #if defined (HAVE_PRPSINFO32_T)		/* Sparc64 cross Sparc32 */
@@ -10630,6 +10654,34 @@ elfcore_grok_note (bfd *abfd, Elf_Internal_Note *note)
       else
 	return true;
 
+    case NT_LARCH_CPUCFG:
+      if (note->namesz == 6
+	  && strcmp (note->namedata, "LINUX") == 0)
+	return elfcore_grok_loongarch_cpucfg (abfd, note);
+      else
+	return true;
+
+    case NT_LARCH_LBT:
+      if (note->namesz == 6
+	  && strcmp (note->namedata, "LINUX") == 0)
+	return elfcore_grok_loongarch_lbt (abfd, note);
+      else
+	return true;
+
+    case NT_LARCH_LSX:
+      if (note->namesz == 6
+	  && strcmp (note->namedata, "LINUX") == 0)
+	return elfcore_grok_loongarch_lsx (abfd, note);
+      else
+	return true;
+
+    case NT_LARCH_LASX:
+      if (note->namesz == 6
+	  && strcmp (note->namedata, "LINUX") == 0)
+	return elfcore_grok_loongarch_lasx (abfd, note);
+      else
+	return true;
+
     case NT_PRPSINFO:
     case NT_PSINFO:
       if (bed->elf_backend_grok_psinfo)
@@ -12210,6 +12262,55 @@ elfcore_write_arc_v2 (bfd *abfd,
 			     note_name, NT_ARC_V2, arc_v2, size);
 }
 
+char *
+elfcore_write_loongarch_cpucfg (bfd *abfd,
+				char *buf,
+				int *bufsiz,
+				const void *loongarch_cpucfg,
+				int size)
+{
+  char *note_name = "LINUX";
+  return elfcore_write_note (abfd, buf, bufsiz,
+			     note_name, NT_LARCH_CPUCFG,
+			     loongarch_cpucfg, size);
+}
+
+char *
+elfcore_write_loongarch_lbt (bfd *abfd,
+			     char *buf,
+			     int *bufsiz,
+			     const void *loongarch_lbt,
+			     int size)
+{
+  char *note_name = "LINUX";
+  return elfcore_write_note (abfd, buf, bufsiz,
+			     note_name, NT_LARCH_LBT, loongarch_lbt, size);
+}
+
+char *
+elfcore_write_loongarch_lsx (bfd *abfd,
+			     char *buf,
+			     int *bufsiz,
+			     const void *loongarch_lsx,
+			     int size)
+{
+  char *note_name = "LINUX";
+  return elfcore_write_note (abfd, buf, bufsiz,
+			     note_name, NT_LARCH_LSX, loongarch_lsx, size);
+}
+
+char *
+elfcore_write_loongarch_lasx (bfd *abfd,
+			      char *buf,
+			      int *bufsiz,
+			      const void *loongarch_lasx,
+			      int size)
+{
+  char *note_name = "LINUX";
+  return elfcore_write_note (abfd, buf, bufsiz,
+			     note_name, NT_LARCH_LASX, loongarch_lasx, size);
+}
+
 /* Write the buffer of csr values in CSRS (length SIZE) into the note
    buffer BUF and update *BUFSIZ.  ABFD is the bfd the note is being
    written into.  Return a pointer to the new start of the note buffer, to
@@ -12334,6 +12435,14 @@ elfcore_write_register_note (bfd *abfd,
     return elfcore_write_gdb_tdesc (abfd, buf, bufsiz, data, size);
   if (strcmp (section, ".reg-riscv-csr") == 0)
     return elfcore_write_riscv_csr (abfd, buf, bufsiz, data, size);
+  if (strcmp (section, ".reg-loongarch-cpucfg") == 0)
+    return elfcore_write_loongarch_cpucfg (abfd, buf, bufsiz, data, size);
+  if (strcmp (section, ".reg-loongarch-lbt") == 0)
+    return elfcore_write_loongarch_lbt (abfd, buf, bufsiz, data, size);
+  if (strcmp (section, ".reg-loongarch-lsx") == 0)
+    return elfcore_write_loongarch_lsx (abfd, buf, bufsiz, data, size);
+  if (strcmp (section, ".reg-loongarch-lasx") == 0)
+    return elfcore_write_loongarch_lasx (abfd, buf, bufsiz, data, size);
   return NULL;
 }