BFD vector for elf32-i386-nacl:

bfd/
	* elf32-i386.c (NACL_PLT_ENTRY_SIZE, NACLMASK): New macros.
	(elf_i386_nacl_plt0_entry): New variable.
	(elf_i386_plt_entry): New variable.
	(elf_i386_nacl_pic_plt0_entry): New variable.
	(elf_i386_nacl_pic_plt_entry): New variable.
	(elf_i386_nacl_plt, elf_i386_nacl_arch_bed): New variables.
	(elf_backend_arch_data): New macro setting for elf_i386_nacl_vec stanza.
	(elf_backend_plt_alignment): Likewise.

	* config.bfd: Handle i[3-7]86-*-nacl*.
	* elf32-i386.c (bfd_elf32_i386_nacl_vec): New backend vector stanza.
	* targets.c: Support bfd_elf32_i386_nacl_vec.
	* configure.in: Likewise.
	* configure: Regenerated.

diff --git a/bfd/ChangeLog b/bfd/ChangeLog
index f1885cb1338ccb9fc9278f83217b668d9d159581..c3fac58ee4559f27eba9870c80c6cb02904410a7 100644 (file)
--- a/bfd/ChangeLog
+++ b/bfd/ChangeLog
@@ -1,5 +1,20 @@
 2011-07-28  Roland McGrath  <mcgrathr@google.com>
 
+       * elf32-i386.c (NACL_PLT_ENTRY_SIZE, NACLMASK): New macros.
+       (elf_i386_nacl_plt0_entry): New variable.
+       (elf_i386_plt_entry): New variable.
+       (elf_i386_nacl_pic_plt0_entry): New variable.
+       (elf_i386_nacl_pic_plt_entry): New variable.
+       (elf_i386_nacl_plt, elf_i386_nacl_arch_bed): New variables.
+       (elf_backend_arch_data): New macro setting for elf_i386_nacl_vec stanza.
+       (elf_backend_plt_alignment): Likewise.
+
+       * config.bfd: Handle i[3-7]86-*-nacl*.
+       * elf32-i386.c (bfd_elf32_i386_nacl_vec): New backend vector stanza.
+       * targets.c: Support bfd_elf32_i386_nacl_vec.
+       * configure.in: Likewise.
+       * configure: Regenerated.
+
        * elf32-i386.c (struct elf_i386_plt_layout): New type.
        (GET_PLT_ENTRY_SIZE): New macro.
        (elf_i386_plt): New variable.

diff --git a/bfd/config.bfd b/bfd/config.bfd
index 3f5b9a1abbd86f6fd8f08c3f34b690dfb2eb7941..3b9872a2a4d42e8ff24291011d84e572df29c2c1 100644 (file)
--- a/bfd/config.bfd
+++ b/bfd/config.bfd
@@ -566,6 +566,10 @@ case "${targ}" in
     targ_selvecs="i386linux_vec i386pei_vec"
     targ64_selvecs="bfd_elf64_x86_64_vec bfd_elf32_x86_64_vec bfd_elf64_l1om_vec bfd_elf64_k1om_vec"
     ;;
+  i[3-7]86-*-nacl*)
+    targ_defvec=bfd_elf32_i386_nacl_vec
+    targ_selvecs="bfd_elf32_i386_vec"
+    ;;
 #ifdef BFD64
   x86_64-*-darwin*)
     targ_defvec=mach_o_x86_64_vec
@@ -714,12 +718,12 @@ case "${targ}" in
     targ_defvec=bfd_elf32_lm32_vec
     targ_selvecs=bfd_elf32_lm32fdpic_vec
     ;;
-    
+
   lm32-*-*linux*)
     targ_defvec=bfd_elf32_lm32fdpic_vec
     targ_selvecs=bfd_elf32_lm32_vec
     ;;
-    
+
   m32c-*-elf | m32c-*-rtems*)
     targ_defvec=bfd_elf32_m32c_vec
     ;;
@@ -927,11 +931,11 @@ case "${targ}" in
     want64=true
     ;;
 #endif
-  mips*el-sde-elf*)    
+  mips*el-sde-elf*)
     targ_defvec=bfd_elf32_tradlittlemips_vec
     targ_selvecs="bfd_elf32_tradbigmips_vec bfd_elf32_ntradbigmips_vec bfd_elf32_ntradlittlemips_vec bfd_elf64_tradbigmips_vec bfd_elf64_tradlittlemips_vec"
     want64=true
-    ;;  
+    ;;
   mips*-sde-elf*)
     targ_defvec=bfd_elf32_tradbigmips_vec
     targ_selvecs="bfd_elf32_tradlittlemips_vec bfd_elf32_ntradbigmips_vec bfd_elf32_ntradlittlemips_vec bfd_elf64_tradbigmips_vec bfd_elf64_tradlittlemips_vec"
@@ -1541,7 +1545,7 @@ case "${targ}" in
  xc16x-*-elf)
     targ_defvec=bfd_elf32_xc16x_vec
     ;;
-  
+
   z80-*-*)
     targ_defvec=z80coff_vec
     targ_underscore=no

diff --git a/bfd/configure b/bfd/configure
index 40c17db9ca9a128f9dcf60241fedfc27e55c602a..06f78398c77196e5104cd1546558562bf5404ce1 100755 (executable)
--- a/bfd/configure
+++ b/bfd/configure
@@ -15210,6 +15210,7 @@ do
     bfd_elf32_i370_vec)                tb="$tb elf32-i370.lo elf32.lo $elf" ;;
     bfd_elf32_i386_sol2_vec)   tb="$tb elf32-i386.lo elf-ifunc.lo elf-vxworks.lo elf32.lo $elf" ;;
     bfd_elf32_i386_freebsd_vec)        tb="$tb elf32-i386.lo elf-ifunc.lo elf-vxworks.lo elf32.lo $elf" ;;
+    bfd_elf32_i386_nacl_vec)   tb="$tb elf32-i386.lo elf-ifunc.lo elf-vxworks.lo elf32.lo $elf" ;;
     bfd_elf32_i386_vxworks_vec)        tb="$tb elf32-i386.lo elf-ifunc.lo elf-vxworks.lo elf32.lo $elf" ;;
     bfd_elf32_i386_vec)                tb="$tb elf32-i386.lo elf-ifunc.lo elf-vxworks.lo elf32.lo $elf" ;;
     bfd_elf32_i860_little_vec) tb="$tb elf32-i860.lo elf32.lo $elf" ;;

diff --git a/bfd/configure.in b/bfd/configure.in
index e1ae5fc93484b7da6b1855dc6c1bd9442b3c3889..530d4eeab33674b4b42ebbea633caf7fece9ed29 100644 (file)
--- a/bfd/configure.in
+++ b/bfd/configure.in
@@ -709,6 +709,7 @@ do
     bfd_elf32_i370_vec)                tb="$tb elf32-i370.lo elf32.lo $elf" ;;
     bfd_elf32_i386_sol2_vec)   tb="$tb elf32-i386.lo elf-ifunc.lo elf-vxworks.lo elf32.lo $elf" ;;
     bfd_elf32_i386_freebsd_vec)        tb="$tb elf32-i386.lo elf-ifunc.lo elf-vxworks.lo elf32.lo $elf" ;;
+    bfd_elf32_i386_nacl_vec)   tb="$tb elf32-i386.lo elf-ifunc.lo elf-vxworks.lo elf32.lo $elf" ;;
     bfd_elf32_i386_vxworks_vec)        tb="$tb elf32-i386.lo elf-ifunc.lo elf-vxworks.lo elf32.lo $elf" ;;
     bfd_elf32_i386_vec)                tb="$tb elf32-i386.lo elf-ifunc.lo elf-vxworks.lo elf32.lo $elf" ;;
     bfd_elf32_i860_little_vec) tb="$tb elf32-i860.lo elf32.lo $elf" ;;

diff --git a/bfd/elf32-i386.c b/bfd/elf32-i386.c
index cb16fafafc5613b876939a9db0d4931b22531159..38c7c5a61098339926fa754338f9aadc5b90e32a 100644 (file)
--- a/bfd/elf32-i386.c
+++ b/bfd/elf32-i386.c
@@ -5030,6 +5030,170 @@ elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
 
 #include "elf32-target.h"
 
+/* Native Client support.  */
+
+#undef TARGET_LITTLE_SYM
+#define        TARGET_LITTLE_SYM               bfd_elf32_i386_nacl_vec
+#undef TARGET_LITTLE_NAME
+#define        TARGET_LITTLE_NAME              "elf32-i386-nacl"
+#undef elf32_bed
+#define        elf32_bed                       elf32_i386_nacl_bed
+
+#undef ELF_MAXPAGESIZE
+#define        ELF_MAXPAGESIZE                 0x10000
+
+/* Restore defaults.  */
+#undef ELF_OSABI
+#undef elf_backend_want_plt_sym
+#define elf_backend_want_plt_sym       0
+#undef elf_backend_post_process_headers
+#define        elf_backend_post_process_headers        _bfd_elf_set_osabi
+#undef elf_backend_static_tls_alignment
+
+/* NaCl uses substantially different PLT entries for the same effects.  */
+
+#undef elf_backend_plt_alignment
+#define elf_backend_plt_alignment      5
+#define NACL_PLT_ENTRY_SIZE            64
+#define        NACLMASK                        0xe0 /* 32-byte alignment mask.  */
+
+static const bfd_byte elf_i386_nacl_plt0_entry[] =
+  {
+    0xff, 0x35,                          /* pushl contents of address */
+    0, 0, 0, 0,                          /* replaced with address of .got + 4.  */
+    0x8b, 0x0d,                   /* movl contents of address, %ecx */
+    0, 0, 0, 0,                          /* replaced with address of .got + 8.  */
+    0x83, 0xe1, NACLMASK,        /* andl $NACLMASK, %ecx */
+    0xff, 0xe1                   /* jmp *%ecx */
+  };
+
+static const bfd_byte elf_i386_nacl_plt_entry[NACL_PLT_ENTRY_SIZE] =
+  {
+    0x8b, 0x0d,                                /* movl contents of address, %ecx */
+    0, 0, 0, 0,                                /* replaced with GOT slot address.  */
+    0x83, 0xe1, NACLMASK,              /* andl $NACLMASK, %ecx */
+    0xff, 0xe1,                                /* jmp *%ecx */
+
+    /* Pad to the next 32-byte boundary with nop instructions. */
+    0x90,
+    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
+    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
+
+    /* Lazy GOT entries point here (32-byte aligned).  */
+    0x68,                             /* pushl immediate */
+    0, 0, 0, 0,                               /* replaced with reloc offset.  */
+    0xe9,                             /* jmp relative */
+    0, 0, 0, 0,                               /* replaced with offset to .plt.  */
+
+    /* Pad to the next 32-byte boundary with nop instructions. */
+    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
+    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
+    0x90, 0x90
+  };
+
+static const bfd_byte
+elf_i386_nacl_pic_plt0_entry[sizeof (elf_i386_nacl_plt0_entry)] =
+  {
+    0xff, 0x73, 0x04,          /* pushl 4(%ebx) */
+    0x8b, 0x4b, 0x08,          /* mov 0x8(%ebx), %ecx */
+    0x83, 0xe1, 0xe0,          /* and $NACLMASK, %ecx */
+    0xff, 0xe1,                        /* jmp *%ecx */
+    0x90                        /* nop */
+  };
+
+static const bfd_byte elf_i386_nacl_pic_plt_entry[NACL_PLT_ENTRY_SIZE] =
+  {
+    0x8b, 0x8b,          /* movl offset(%ebx), %ecx */
+    0, 0, 0, 0,          /* replaced with offset of this symbol in .got.  */
+    0x83, 0xe1, 0xe0,    /* andl $NACLMASK, %ecx */
+    0xff, 0xe1,          /* jmp *%ecx */
+
+    /* Pad to the next 32-byte boundary with nop instructions. */
+    0x90,
+    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
+    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
+
+    /* Lazy GOT entries point here (32-byte aligned).  */
+    0x68,                /* pushl immediate */
+    0, 0, 0, 0,          /* replaced with offset into relocation table.  */
+    0xe9,                /* jmp relative */
+    0, 0, 0, 0,          /* replaced with offset to start of .plt.  */
+
+    /* Pad to the next 32-byte boundary with nop instructions. */
+    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
+    0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90, 0x90,
+    0x90, 0x90
+  };
+
+static const bfd_byte elf_i386_nacl_eh_frame_plt[] =
+  {
+#if (PLT_CIE_LENGTH != 20                               \
+     || PLT_FDE_LENGTH != 36                            \
+     || PLT_FDE_START_OFFSET != 4 + PLT_CIE_LENGTH + 8  \
+     || PLT_FDE_LEN_OFFSET != 4 + PLT_CIE_LENGTH + 12)
+# error "Need elf_i386_backend_data parameters for eh_frame_plt offsets!"
+#endif
+    PLT_CIE_LENGTH, 0, 0, 0,           /* CIE length */
+    0, 0, 0, 0,                         /* CIE ID */
+    1,                                  /* CIE version */
+    'z', 'R', 0,                        /* Augmentation string */
+    1,                                  /* Code alignment factor */
+    0x7c,                               /* Data alignment factor: -4 */
+    8,                                  /* Return address column */
+    1,                                 /* Augmentation size */
+    DW_EH_PE_pcrel | DW_EH_PE_sdata4,  /* FDE encoding */
+    DW_CFA_def_cfa, 4, 4,              /* DW_CFA_def_cfa: r4 (esp) ofs 4 */
+    DW_CFA_offset + 8, 1,              /* DW_CFA_offset: r8 (eip) at cfa-4 */
+    DW_CFA_nop, DW_CFA_nop,
+
+    PLT_FDE_LENGTH, 0, 0, 0,     /* FDE length */
+    PLT_CIE_LENGTH + 8, 0, 0, 0, /* CIE pointer */
+    0, 0, 0, 0,                  /* R_386_PC32 .plt goes here */
+    0, 0, 0, 0,                  /* .plt size goes here */
+    0,                           /* Augmentation size */
+    DW_CFA_def_cfa_offset, 8,    /* DW_CFA_def_cfa_offset: 8 */
+    DW_CFA_advance_loc + 6,      /* DW_CFA_advance_loc: 6 to __PLT__+6 */
+    DW_CFA_def_cfa_offset, 12,   /* DW_CFA_def_cfa_offset: 12 */
+    DW_CFA_advance_loc + 58,     /* DW_CFA_advance_loc: 58 to __PLT__+64 */
+    DW_CFA_def_cfa_expression,   /* DW_CFA_def_cfa_expression */
+    13,                          /* Block length */
+    DW_OP_breg4, 4,              /* DW_OP_breg4 (esp): 4 */
+    DW_OP_breg8, 0,              /* DW_OP_breg8 (eip): 0 */
+    DW_OP_const1u, 63, DW_OP_and, DW_OP_const1u, 37, DW_OP_ge,
+    DW_OP_lit2, DW_OP_shl, DW_OP_plus,
+    DW_CFA_nop, DW_CFA_nop
+  };
+
+static const struct elf_i386_plt_layout elf_i386_nacl_plt =
+  {
+    elf_i386_nacl_plt0_entry,          /* plt0_entry */
+    sizeof (elf_i386_nacl_plt0_entry), /* plt0_entry_size */
+    2,                                 /* plt0_got1_offset */
+    8,                                 /* plt0_got2_offset */
+    elf_i386_nacl_plt_entry,           /* plt_entry */
+    NACL_PLT_ENTRY_SIZE,               /* plt_entry_size */
+    2,                                 /* plt_got_offset */
+    33,                                        /* plt_reloc_offset */
+    38,                                        /* plt_plt_offset */
+    32,                                        /* plt_lazy_offset */
+    elf_i386_nacl_pic_plt0_entry,      /* pic_plt0_entry */
+    elf_i386_nacl_pic_plt_entry,       /* pic_plt_entry */
+    elf_i386_nacl_eh_frame_plt,                /* eh_frame_plt */
+    sizeof (elf_i386_nacl_eh_frame_plt),/* eh_frame_plt_size */
+  };
+
+static const struct elf_i386_backend_data elf_i386_nacl_arch_bed =
+  {
+    &elf_i386_nacl_plt,                      /* plt */
+    0x90,                              /* plt0_pad_byte: nop insn */
+    0,                                  /* is_vxworks */
+  };
+
+#undef elf_backend_arch_data
+#define elf_backend_arch_data  &elf_i386_nacl_arch_bed
+
+#include "elf32-target.h"
+
 /* VxWorks support.  */
 
 #undef TARGET_LITTLE_SYM
@@ -5037,6 +5201,8 @@ elf_i386_fbsd_post_process_headers (bfd *abfd, struct bfd_link_info *info)
 #undef TARGET_LITTLE_NAME
 #define TARGET_LITTLE_NAME             "elf32-i386-vxworks"
 #undef ELF_OSABI
+#undef elf_backend_plt_alignment
+#define elf_backend_plt_alignment      4
 
 static const struct elf_i386_backend_data elf_i386_vxworks_arch_bed =
   {

diff --git a/bfd/targets.c b/bfd/targets.c
index 0bfc104dbbf89403b6b1ae3ee3213d386de20d51..c34ce69072af09ebb2a3c27985763fdf14493fef 100644 (file)
--- a/bfd/targets.c
+++ b/bfd/targets.c
@@ -1,6 +1,6 @@
 /* Generic target-file-type support for the BFD library.
    Copyright 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
-   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010
+   2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011
    Free Software Foundation, Inc.
    Written by Cygnus Support.
 
@@ -618,6 +618,7 @@ extern const bfd_target bfd_elf32_hppa_nbsd_vec;
 extern const bfd_target bfd_elf32_hppa_vec;
 extern const bfd_target bfd_elf32_i370_vec;
 extern const bfd_target bfd_elf32_i386_freebsd_vec;
+extern const bfd_target bfd_elf32_i386_nacl_vec;
 extern const bfd_target bfd_elf32_i386_sol2_vec;
 extern const bfd_target bfd_elf32_i386_vxworks_vec;
 extern const bfd_target bfd_elf32_i386_vec;
@@ -978,6 +979,7 @@ static const bfd_target * const _bfd_target_vector[] =
        &bfd_elf32_hppa_vec,
        &bfd_elf32_i370_vec,
        &bfd_elf32_i386_freebsd_vec,
+       &bfd_elf32_i386_nacl_vec,
        &bfd_elf32_i386_sol2_vec,
        &bfd_elf32_i386_vxworks_vec,
        &bfd_elf32_i386_vec,