Support Mips architecture

	* backends/Makefile.am (modules): Add mips.
	(mips_SRCS): New var for mips_init.c mips_symbol.c.
	(libebl_backends_a_SOURCES): Add mips_SRCS.
	* backends/mips_init.c: New file.
	* backends/mips_reloc.def: Likewise.
	* backends/mips_symbol.c: Likewise.
	* libebl/eblopenbackend.c (mips_init): Declare.
	(machines): Add mips.
	* libelf/libelfP.h: Add ELF64_MIPS_R_TYPE{1,2,3}

Signed-off-by: Ying Huang <ying.huang@oss.cipunited.com>

diff --git a/backends/Makefile.am b/backends/Makefile.am
index bbb2aac79ab8a23676b3fe0509f0766e7ac8054a..b946fd30495f268403019ab1aed88bf3d364cf93 100644 (file)
--- a/backends/Makefile.am
+++ b/backends/Makefile.am
@@ -37,7 +37,7 @@ AM_CPPFLAGS += -I$(top_srcdir)/libebl -I$(top_srcdir)/libasm \
 noinst_LIBRARIES = libebl_backends.a libebl_backends_pic.a
 
 modules = i386 sh x86_64 ia64 alpha arm aarch64 sparc ppc ppc64 s390 \
-         m68k bpf riscv csky loongarch arc
+         m68k bpf riscv csky loongarch arc mips
 
 i386_SRCS = i386_init.c i386_symbol.c i386_corenote.c i386_cfi.c \
            i386_retval.c i386_regs.c i386_auxv.c \
@@ -102,12 +102,14 @@ loongarch_SRCS = loongarch_init.c loongarch_symbol.c loongarch_cfi.c \
 
 arc_SRCS = arc_init.c arc_symbol.c
 
+mips_SRCS = mips_init.c mips_symbol.c
+
 libebl_backends_a_SOURCES = $(i386_SRCS) $(sh_SRCS) $(x86_64_SRCS) \
                            $(ia64_SRCS) $(alpha_SRCS) $(arm_SRCS) \
                            $(aarch64_SRCS) $(sparc_SRCS) $(ppc_SRCS) \
                            $(ppc64_SRCS) $(s390_SRCS) \
                            $(m68k_SRCS) $(bpf_SRCS) $(riscv_SRCS) $(csky_SRCS) \
-                           $(loongarch_SRCS) $(arc_SRCS)
+                           $(loongarch_SRCS) $(arc_SRCS) $(mips_SRCS)
 
 libebl_backends_pic_a_SOURCES =
 am_libebl_backends_pic_a_OBJECTS = $(libebl_backends_a_SOURCES:.c=.os)

diff --git a/backends/mips_init.c b/backends/mips_init.c
new file mode 100644 (file)
index 0000000..cedd08c
--- /dev/null
+++ b/backends/mips_init.c
@@ -0,0 +1,52 @@
+/* Initialization of MIPS specific backend library.
+   Copyright (C) 2024 CIP United Inc.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#define BACKEND                mips_
+#define RELOC_PREFIX   R_MIPS_
+#include "libebl_CPU.h"
+#include "libelfP.h"
+
+#define RELOC_TYPE_ID(type) ((type) & 0xff)
+
+/* This defines the common reloc hooks based on mips_reloc.def.  */
+#include "common-reloc.c"
+
+Ebl *
+mips_init (Elf *elf __attribute__ ((unused)),
+          GElf_Half machine __attribute__ ((unused)),
+          Ebl *eh)
+{
+  /* We handle it.  */
+  mips_init_reloc (eh);
+  HOOK (eh, reloc_simple_type);
+  return eh;
+}

diff --git a/backends/mips_reloc.def b/backends/mips_reloc.def
new file mode 100644 (file)
index 0000000..5120980
--- /dev/null
+++ b/backends/mips_reloc.def
@@ -0,0 +1,93 @@
+/* List the relocation types for MIPS.  -*- C -*-
+   Copyright (C) 2024 CIP United Inc.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+/*         NAME,               REL|EXEC|DYN    */
+
+
+RELOC_TYPE (NONE,              REL|EXEC|DYN)
+RELOC_TYPE (16,                        REL|EXEC|DYN)
+RELOC_TYPE (32,                        REL)
+RELOC_TYPE (REL32,             REL|EXEC|DYN)
+RELOC_TYPE (26,                        REL|DYN)
+RELOC_TYPE (HI16,              REL)
+RELOC_TYPE (LO16,              REL|EXEC|DYN)
+RELOC_TYPE (GPREL16,           REL|EXEC|DYN)
+RELOC_TYPE (LITERAL,           REL|EXEC|DYN)
+RELOC_TYPE (GOT16,             REL|EXEC|DYN)
+RELOC_TYPE (PC16,              REL)
+RELOC_TYPE (CALL16,            REL)
+RELOC_TYPE (GPREL32,           REL)
+RELOC_TYPE (SHIFT5,            REL)
+RELOC_TYPE (SHIFT6,            REL)
+RELOC_TYPE (64,                        REL)
+RELOC_TYPE (GOT_DISP,          REL)
+RELOC_TYPE (GOT_PAGE,          REL)
+RELOC_TYPE (GOT_OFST,          REL)
+RELOC_TYPE (GOT_HI16,          REL)
+RELOC_TYPE (GOT_LO16,          REL)
+RELOC_TYPE (SUB,               REL)
+RELOC_TYPE (INSERT_A,          REL)
+RELOC_TYPE (INSERT_B,          REL)
+RELOC_TYPE (DELETE,            REL)
+RELOC_TYPE (HIGHER,            REL)
+RELOC_TYPE (HIGHEST,           REL)
+RELOC_TYPE (CALL_HI16,         REL)
+RELOC_TYPE (CALL_LO16,         REL)
+RELOC_TYPE (SCN_DISP,          REL)
+RELOC_TYPE (REL16,             REL)
+RELOC_TYPE (ADD_IMMEDIATE,     REL)
+RELOC_TYPE (PJUMP,             REL)
+RELOC_TYPE (RELGOT,            REL)
+RELOC_TYPE (JALR,              REL)
+RELOC_TYPE (TLS_DTPMOD32,      DYN)
+RELOC_TYPE (TLS_DTPREL32,      REL)
+RELOC_TYPE (TLS_DTPMOD64,      DYN)
+RELOC_TYPE (TLS_DTPREL64,      REL)
+RELOC_TYPE (TLS_GD,            REL)
+RELOC_TYPE (TLS_LDM,           REL)
+RELOC_TYPE (TLS_DTPREL_HI16,   REL)
+RELOC_TYPE (TLS_DTPREL_LO16,   REL)
+RELOC_TYPE (TLS_GOTTPREL,      REL)
+RELOC_TYPE (TLS_TPREL32,       REL)
+RELOC_TYPE (TLS_TPREL64,       REL)
+RELOC_TYPE (TLS_TPREL_HI16,    REL)
+RELOC_TYPE (TLS_TPREL_LO16,    REL)
+RELOC_TYPE (GLOB_DAT,          REL)
+RELOC_TYPE (PC21_S2,           REL)
+RELOC_TYPE (PC26_S2,           REL)
+RELOC_TYPE (PC18_S3,           REL)
+RELOC_TYPE (PC19_S2,           REL)
+RELOC_TYPE (PCHI16,            REL)
+RELOC_TYPE (PCLO16,            REL)
+RELOC_TYPE (COPY,              REL)
+RELOC_TYPE (JUMP_SLOT,         REL)
+RELOC_TYPE (PC32,              REL)
+RELOC_TYPE (EH,                        REL)
+RELOC_TYPE (GNU_REL16_S2,      REL)
+RELOC_TYPE (GNU_VTINHERIT,     REL)
+RELOC_TYPE (GNU_VTENTRY,       REL)

diff --git a/backends/mips_symbol.c b/backends/mips_symbol.c
new file mode 100644 (file)
index 0000000..f2a4649
--- /dev/null
+++ b/backends/mips_symbol.c
@@ -0,0 +1,63 @@
+/* MIPS specific symbolic name handling.
+   Copyright (C) 2024 CIP United Inc.
+   This file is part of elfutils.
+
+   This file is free software; you can redistribute it and/or modify
+   it under the terms of either
+
+     * the GNU Lesser General Public License as published by the Free
+       Software Foundation; either version 3 of the License, or (at
+       your option) any later version
+
+   or
+
+     * the GNU General Public License as published by the Free
+       Software Foundation; either version 2 of the License, or (at
+       your option) any later version
+
+   or both in parallel, as here.
+
+   elfutils 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 copies of the GNU General Public License and
+   the GNU Lesser General Public License along with this program.  If
+   not, see <http://www.gnu.org/licenses/>.  */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include <system.h>
+
+#include <elf.h>
+#include <stddef.h>
+#include <string.h>
+#include <stdio.h>
+#define BACKEND                mips_
+#include "libebl_CPU.h"
+#include "libelfP.h"
+
+/* Check for the simple reloc types.  */
+Elf_Type
+mips_reloc_simple_type (Ebl *ebl, int type,
+                          int *addsub __attribute__ ((unused)))
+{
+  int typeNew = type;
+  if(ebl->elf->class == ELFCLASS64)
+    typeNew = ELF64_MIPS_R_TYPE1(type);
+  switch (typeNew)
+    {
+    case R_MIPS_64:
+      return ELF_T_XWORD;
+    case R_MIPS_32:
+      return ELF_T_WORD;
+    case R_MIPS_16:
+      return ELF_T_HALF;
+
+    default:
+      return ELF_T_NUM;
+    }
+}

diff --git a/libebl/eblopenbackend.c b/libebl/eblopenbackend.c
index 084a1544b286c207f2f4cb4db92e70bdd6d3d636..a5f7467a09d2def511f1d307cacef5f69bb9948c 100644 (file)
--- a/libebl/eblopenbackend.c
+++ b/libebl/eblopenbackend.c
@@ -57,6 +57,7 @@ Ebl *riscv_init (Elf *, GElf_Half, Ebl *);
 Ebl *csky_init (Elf *, GElf_Half, Ebl *);
 Ebl *loongarch_init (Elf *, GElf_Half, Ebl *);
 Ebl *arc_init (Elf *, GElf_Half, Ebl *);
+Ebl *mips_init (Elf *, GElf_Half, Ebl *);
 
 /* This table should contain the complete list of architectures as far
    as the ELF specification is concerned.  */
@@ -154,6 +155,7 @@ static const struct
   { csky_init, "elf_csky", "csky", 4, EM_CSKY, ELFCLASS32, ELFDATA2LSB },
   { loongarch_init, "elf_loongarch", "loongarch", 9, EM_LOONGARCH, ELFCLASS64, ELFDATA2LSB },
   { arc_init, "elf_arc", "arc", 3, EM_ARCV2, ELFCLASS32, ELFDATA2LSB },
+  { mips_init, "elf_mips", "mips", 4, EM_MIPS, 0, 0 },
 };
 #define nmachines (sizeof (machines) / sizeof (machines[0]))
 

diff --git a/libelf/libelfP.h b/libelf/libelfP.h
index ed061abb0066e2351eacf270c3bb2eae406dc450..bdd2cc6ac27d7432929023cef4f822098d863a61 100644 (file)
--- a/libelf/libelfP.h
+++ b/libelf/libelfP.h
@@ -617,4 +617,7 @@ extern void __libelf_reset_rawdata (Elf_Scn *scn, void *buf, size_t size,
 #define INVALID_NDX(ndx, type, data) \
   unlikely ((data)->d_size / sizeof (type) <= (unsigned int) (ndx))
 
+#define ELF64_MIPS_R_TYPE1(i)          ((i) & 0xff)
+#define ELF64_MIPS_R_TYPE2(i)           (((i) >> 8) & 0xff)
+#define ELF64_MIPS_R_TYPE3(i)           (((i) >> 16) & 0xff)
 #endif  /* libelfP.h */