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[PATCH 03/19] PRU Binutils port

Dimitar Dimitrov dimitar@dinux.eu
Mon Dec 5 20:43:00 GMT 2016 
2016-10-24  Dimitar Dimitrov <dimitar@dinux.eu>

	* binutils/readelf.c: Add PRU ELF and relocations.
	* include/elf/common.h: Add PRU ELF.
	* include/elf/pru.h: New file.

Signed-off-by: Dimitar Dimitrov <dimitar@dinux.eu>
---
 binutils/readelf.c   | 24 ++++++++++++++++++++
 include/elf/common.h |  2 +-
 include/elf/pru.h    | 62 ++++++++++++++++++++++++++++++++++++++++++++++++++++
 3 files changed, 87 insertions(+), 1 deletion(-)
 create mode 100644 include/elf/pru.h

diff --git a/binutils/readelf.c b/binutils/readelf.c
index c5a628f..6d70a6b 100644
--- a/binutils/readelf.c
+++ b/binutils/readelf.c
@@ -137,6 +137,7 @@
 #include "elf/pj.h"
 #include "elf/ppc.h"
 #include "elf/ppc64.h"
+#include "elf/pru.h"
 #include "elf/rl78.h"
 #include "elf/rx.h"
 #include "elf/s390.h"
@@ -776,6 +777,7 @@ guess_is_rela (unsigned int e_machine)
     case EM_OR1K:
     case EM_PPC64:
     case EM_PPC:
+    case EM_PRU:
     case EM_RISCV:
     case EM_RL78:
     case EM_RX:
@@ -1483,6 +1485,10 @@ dump_relocations (FILE * file,
 	case EM_ALTERA_NIOS2:
 	  rtype = elf_nios2_reloc_type (type);
 	  break;
+
+	case EM_PRU:
+	  rtype = elf_pru_reloc_type (type);
+	  break;
 	}
 
       if (rtype == NULL)
@@ -2370,6 +2376,7 @@ get_machine_name (unsigned e_machine)
     case EM_CSR_KALIMBA:	return "CSR Kalimba architecture family";
     case EM_Z80:		return "Zilog Z80";
     case EM_AMDGPU:		return "AMD GPU architecture";
+    case EM_PRU:		return "TI PRU I/O processor";
     default:
       snprintf (buff, sizeof (buff), _("<unknown>: 0x%x"), e_machine);
       return buff;
@@ -11664,6 +11671,18 @@ target_specific_reloc_handling (Elf_Internal_Rela * reloc,
 	break;
       }
 
+    case EM_PRU:
+      {
+	switch (reloc_type)
+	  {
+	  case 42:  /* R_PRU_DIFF8.  */
+	  case 43:  /* R_PRU_DIFF16.  */
+	  case 44:  /* R_PRU_DIFF32.  */
+	    /* Nothing to do - diff value already stored.  */
+	    return TRUE;
+	  }
+      }
+
     case EM_RL78:
       {
 	static bfd_vma saved_sym1 = 0;
@@ -11834,6 +11853,8 @@ is_32bit_abs_reloc (unsigned int reloc_type)
       return reloc_type == 1; /* R_PPC64_ADDR32.  */
     case EM_PPC:
       return reloc_type == 1; /* R_PPC_ADDR32.  */
+    case EM_PRU:
+      return reloc_type == 47; /* R_PRU_BFD_RELOC_32.  */
     case EM_RISCV:
       return reloc_type == 1; /* R_RISCV_32.  */
     case EM_RL78:
@@ -12116,6 +12137,8 @@ is_16bit_abs_reloc (unsigned int reloc_type)
       return reloc_type == 9; /* R_NIOS_16.  */
     case EM_OR1K:
       return reloc_type == 2; /* R_OR1K_16.  */
+    case EM_PRU:
+      return reloc_type == 48; /* R_PRU_BFD_RELOC_16.  */
     case EM_TI_C6000:
       return reloc_type == 2; /* R_C6000_ABS16.  */
     case EM_VISIUM:
@@ -12162,6 +12185,7 @@ is_none_reloc (unsigned int reloc_type)
     case EM_PARISC:  /* R_PARISC_NONE.  */
     case EM_PPC64:   /* R_PPC64_NONE.  */
     case EM_PPC:     /* R_PPC_NONE.  */
+    case EM_PRU:     /* R_PRU_NONE.  */
     case EM_RISCV:   /* R_RISCV_NONE.  */
     case EM_S390:    /* R_390_NONE.  */
     case EM_S390_OLD:
diff --git a/include/elf/common.h b/include/elf/common.h
index da79613..d5673c5 100644
--- a/include/elf/common.h
+++ b/include/elf/common.h
@@ -248,7 +248,7 @@
 #define EM_TI_C2000	141	/* Texas Instruments TMS320C2000 DSP family */
 #define EM_TI_C5500	142	/* Texas Instruments TMS320C55x DSP family */
 #define EM_res143	143	/* Reserved */
-#define EM_res144	144	/* Reserved */
+#define EM_PRU		144	/* Texas Instruments PRUSS */
 #define EM_res145	145	/* Reserved */
 #define EM_res146	146	/* Reserved */
 #define EM_res147	147	/* Reserved */
diff --git a/include/elf/pru.h b/include/elf/pru.h
new file mode 100644
index 0000000..e814fe4
--- /dev/null
+++ b/include/elf/pru.h
@@ -0,0 +1,62 @@
+/* TI PRU ELF support for BFD.
+   Copyright (C) 2014-2016 Free Software Foundation, Inc.
+   Contributed by Dimitar Dimitrov <dimitar@dinux.eu>
+
+   This file is part of BFD, the Binary File Descriptor library.
+
+   This program is free software; you can redistribute it and/or modify
+   it under the terms of the GNU General Public License as published by
+   the Free Software Foundation; either version 3 of the License, or
+   (at your option) any later version.
+
+   This program is distributed in the hope that it will be useful,
+   but WITHOUT ANY WARRANTY; without even the implied warranty of
+   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+   GNU General Public License for more details.
+
+   You should have received a copy of the GNU General Public License
+   along with this program; if not, write to the Free Software
+   Foundation, Inc., 51 Franklin Street - Fifth Floor, Boston,
+   MA 02110-1301, USA.  */
+
+
+/* This file holds definitions specific to the TI PRU ELF ABI.  Note
+   that most of this is not actually implemented by BFD.  */
+
+#ifndef _ELF_PRU_H
+#define _ELF_PRU_H
+
+#include "elf/reloc-macros.h"
+
+START_RELOC_NUMBERS (elf_pru_reloc_type)
+  RELOC_NUMBER (R_PRU_NONE,	    0)
+
+  /* The ELF output from TI's CGT may be considered the standard
+     ELF format for PRU.  But it is not documented.  To avoid issues
+     with linking between TI and GNU object files, we use private
+     relocation numbers.  For a small embedded target like PRU this
+     should not be a big deal.  */
+  RELOC_NUMBER (R_PRU_U8,	    32)
+  RELOC_NUMBER (R_PRU_U16,	    33)
+  RELOC_NUMBER (R_PRU_HI16,	    34)
+  RELOC_NUMBER (R_PRU_HI16_RLZ,	    35)
+  RELOC_NUMBER (R_PRU_LO16,	    36)
+  RELOC_NUMBER (R_PRU_U16_PMEMIMM,  37)
+  RELOC_NUMBER (R_PRU_S10_PCREL,    38)
+  RELOC_NUMBER (R_PRU_U8_PCREL,	    39)
+  RELOC_NUMBER (R_PRU_32_PMEM,	    40)
+  RELOC_NUMBER (R_PRU_16_PMEM,	    41)
+  RELOC_NUMBER (R_PRU_DIFF8,	    42)
+  RELOC_NUMBER (R_PRU_DIFF16,	    43)
+  RELOC_NUMBER (R_PRU_DIFF32,	    44)
+  RELOC_NUMBER (R_PRU_DIFF16_PMEM,  45)
+  RELOC_NUMBER (R_PRU_DIFF32_PMEM,  46)
+  RELOC_NUMBER (R_PRU_BFD_RELOC_32, 47)
+  RELOC_NUMBER (R_PRU_BFD_RELOC_16, 48)
+  RELOC_NUMBER (R_PRU_BFD_RELOC_8,  49)
+  RELOC_NUMBER (R_PRU_ILLEGAL,	    50)
+END_RELOC_NUMBERS (R_PRU_maxext)
+
+/* Processor-specific section flags.  */
+
+#endif /* _ELF_PRU_H */
-- 
2.10.2
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