/* 32-bit ELF support for ARM
- Copyright 1998, 1999, 2000 Free Software Foundation, Inc.
+ Copyright 1998, 1999, 2000, 2001 Free Software Foundation, Inc.
This file is part of BFD, the Binary File Descriptor library.
PARAMS ((struct bfd_link_info *, const char *, bfd *, bfd *, asection *,
bfd_byte *, asection *, bfd_vma, bfd_signed_vma, bfd_vma));
-#define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_INTERWORK)
+#define INTERWORK_FLAG(abfd) (elf_elfheader (abfd)->e_flags & EF_ARM_INTERWORK)
/* The linker script knows the section names for placement.
The entry_names are used to do simple name mangling on the stubs.
this. It is set up so that any shared library function that is
called before the relocation has been set up calls the dynamic
linker first. */
-static const bfd_byte elf32_arm_plt0_entry [PLT_ENTRY_SIZE] =
+static const unsigned long elf32_arm_plt0_entry [PLT_ENTRY_SIZE / 4] =
{
- 0x04, 0xe0, 0x2d, 0xe5, /* str lr, [sp, #-4]! */
- 0x10, 0xe0, 0x9f, 0xe5, /* ldr lr, [pc, #16] */
- 0x0e, 0xe0, 0x8f, 0xe0, /* adr lr, pc, lr */
- 0x08, 0xf0, 0xbe, 0xe5 /* ldr pc, [lr, #8]! */
+ 0xe52de004, /* str lr, [sp, #-4]! */
+ 0xe59fe010, /* ldr lr, [pc, #16] */
+ 0xe08fe00e, /* add lr, pc, lr */
+ 0xe5bef008 /* ldr pc, [lr, #8]! */
};
/* Subsequent entries in a procedure linkage table look like
this. */
-static const bfd_byte elf32_arm_plt_entry [PLT_ENTRY_SIZE] =
+static const unsigned long elf32_arm_plt_entry [PLT_ENTRY_SIZE / 4] =
{
- 0x04, 0xc0, 0x9f, 0xe5, /* ldr ip, [pc, #4] */
- 0x0c, 0xc0, 0x8f, 0xe0, /* add ip, pc, ip */
- 0x00, 0xf0, 0x9c, 0xe5, /* ldr pc, [ip] */
- 0x00, 0x00, 0x00, 0x00 /* offset to symbol in got */
+ 0xe59fc004, /* ldr ip, [pc, #4] */
+ 0xe08fc00c, /* add ip, pc, ip */
+ 0xe59cf000, /* ldr pc, [ip] */
+ 0x00000000 /* offset to symbol in got */
};
/* The ARM linker needs to keep track of the number of relocs that it
bfd_signed_vma signed_addend;
struct elf32_arm_link_hash_table * globals;
+ /* If the start address has been set, then set the EF_ARM_HASENTRY
+ flag. Setting this more than once is redundant, but the cost is
+ not too high, and it keeps the code simple.
+
+ The test is done here, rather than somewhere else, because the
+ start address is only set just before the final link commences.
+
+ Note - if the user deliberately sets a start address of 0, the
+ flag will not be set. */
+ if (bfd_get_start_address (output_bfd) != 0)
+ elf_elfheader (output_bfd)->e_flags |= EF_ARM_HASENTRY;
+
globals = elf32_arm_hash_table (info);
dynobj = elf_hash_table (info)->dynobj;
case R_ARM_REL32:
value -= (input_section->output_section->vma
- + input_section->output_offset);
+ + input_section->output_offset + rel->r_offset);
value += addend;
break;
}
upper_insn = (upper_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 12) & 0x7ff);
lower_insn = (lower_insn & ~(bfd_vma) 0x7ff) | ((relocation >> 1) & 0x7ff);
+#ifndef OLD_ARM_ABI
+ if (r_type == R_ARM_THM_XPC22
+ && ((lower_insn & 0x1800) == 0x0800))
+ /* Remove bit zero of the adjusted offset. Bit zero can only be
+ set if the upper insn is at a half-word boundary, since the
+ destination address, an ARM instruction, must always be on a
+ word boundary. The semantics of the BLX (1) instruction, however,
+ are that bit zero in the offset must always be zero, and the
+ corresponding bit one in the target address will be set from bit
+ one of the source address. */
+ lower_insn &= ~1;
+#endif
/* Put the relocated value back in the object file: */
bfd_put_16 (input_bfd, upper_insn, hit_data);
bfd_put_16 (input_bfd, lower_insn, hit_data + 2);
{
if (EF_ARM_EABI_VERSION (flags) == EF_ARM_EABI_UNKNOWN)
{
- if (flags & EF_INTERWORK)
+ if (flags & EF_ARM_INTERWORK)
_bfd_error_handler (_("\
Warning: Not setting interwork flag of %s since it has already been specified as non-interworking"),
bfd_get_filename (abfd));
&& in_flags != out_flags)
{
/* Cannot mix APCS26 and APCS32 code. */
- if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26))
+ if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
return false;
/* Cannot mix float APCS and non-float APCS code. */
- if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT))
+ if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
return false;
/* If the src and dest have different interworking flags
then turn off the interworking bit. */
- if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK))
+ if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
{
- if (out_flags & EF_INTERWORK)
+ if (out_flags & EF_ARM_INTERWORK)
_bfd_error_handler (_("\
Warning: Clearing the interwork flag in %s because non-interworking code in %s has been linked with it"),
bfd_get_filename (obfd), bfd_get_filename (ibfd));
- in_flags &= ~EF_INTERWORK;
+ in_flags &= ~EF_ARM_INTERWORK;
}
/* Likewise for PIC, though don't warn for this case. */
- if ((in_flags & EF_PIC) != (out_flags & EF_PIC))
- in_flags &= ~EF_PIC;
+ if ((in_flags & EF_ARM_PIC) != (out_flags & EF_ARM_PIC))
+ in_flags &= ~EF_ARM_PIC;
}
elf_elfheader (obfd)->e_flags = in_flags;
/* Not sure what needs to be checked for EABI versions >= 1. */
if (EF_ARM_EABI_VERSION (in_flags) == EF_ARM_EABI_UNKNOWN)
{
- if ((in_flags & EF_APCS_26) != (out_flags & EF_APCS_26))
+ if ((in_flags & EF_ARM_APCS_26) != (out_flags & EF_ARM_APCS_26))
{
_bfd_error_handler (_("\
Error: %s compiled for APCS-%d, whereas %s is compiled for APCS-%d"),
bfd_get_filename (ibfd),
- in_flags & EF_APCS_26 ? 26 : 32,
+ in_flags & EF_ARM_APCS_26 ? 26 : 32,
bfd_get_filename (obfd),
- out_flags & EF_APCS_26 ? 26 : 32);
+ out_flags & EF_ARM_APCS_26 ? 26 : 32);
flags_compatible = false;
}
- if ((in_flags & EF_APCS_FLOAT) != (out_flags & EF_APCS_FLOAT))
+ if ((in_flags & EF_ARM_APCS_FLOAT) != (out_flags & EF_ARM_APCS_FLOAT))
{
_bfd_error_handler (_("\
Error: %s passes floats in %s registers, whereas %s passes them in %s registers"),
bfd_get_filename (ibfd),
- in_flags & EF_APCS_FLOAT ? _("float") : _("integer"),
+ in_flags & EF_ARM_APCS_FLOAT ? _("float") : _("integer"),
bfd_get_filename (obfd),
- out_flags & EF_APCS_26 ? _("float") : _("integer"));
+ out_flags & EF_ARM_APCS_26 ? _("float") : _("integer"));
flags_compatible = false;
}
-#ifdef EF_SOFT_FLOAT
- if ((in_flags & EF_SOFT_FLOAT) != (out_flags & EF_SOFT_FLOAT))
+#ifdef EF_ARM_SOFT_FLOAT
+ if ((in_flags & EF_ARM_SOFT_FLOAT) != (out_flags & EF_ARM_SOFT_FLOAT))
{
_bfd_error_handler (_ ("\
Error: %s uses %s floating point, whereas %s uses %s floating point"),
bfd_get_filename (ibfd),
- in_flags & EF_SOFT_FLOAT ? _("soft") : _("hard"),
+ in_flags & EF_ARM_SOFT_FLOAT ? _("soft") : _("hard"),
bfd_get_filename (obfd),
- out_flags & EF_SOFT_FLOAT ? _("soft") : _("hard"));
+ out_flags & EF_ARM_SOFT_FLOAT ? _("soft") : _("hard"));
flags_compatible = false;
}
#endif
/* Interworking mismatch is only a warning. */
- if ((in_flags & EF_INTERWORK) != (out_flags & EF_INTERWORK))
+ if ((in_flags & EF_ARM_INTERWORK) != (out_flags & EF_ARM_INTERWORK))
_bfd_error_handler (_("\
Warning: %s %s interworking, whereas %s %s"),
- bfd_get_filename (ibfd),
- in_flags & EF_INTERWORK ? _("supports") : _("does not support"),
- bfd_get_filename (obfd),
- out_flags & EF_INTERWORK ? _("does not") : _("does"));
+ bfd_get_filename (ibfd),
+ in_flags & EF_ARM_INTERWORK ? _("supports") : _("does not support"),
+ bfd_get_filename (obfd),
+ out_flags & EF_ARM_INTERWORK ? _("does") : _("does not"));
}
return flags_compatible;
/* The following flag bits are GNU extenstions and not part of the
official ARM ELF extended ABI. Hence they are only decoded if
the EABI version is not set. */
- if (flags & EF_INTERWORK)
+ if (flags & EF_ARM_INTERWORK)
fprintf (file, _(" [interworking enabled]"));
- if (flags & EF_APCS_26)
+ if (flags & EF_ARM_APCS_26)
fprintf (file, _(" [APCS-26]"));
else
fprintf (file, _(" [APCS-32]"));
- if (flags & EF_APCS_FLOAT)
+ if (flags & EF_ARM_APCS_FLOAT)
fprintf (file, _(" [floats passed in float registers]"));
- if (flags & EF_PIC)
+ if (flags & EF_ARM_PIC)
fprintf (file, _(" [position independent]"));
- if (flags & EF_NEW_ABI)
+ if (flags & EF_ARM_NEW_ABI)
fprintf (file, _(" [new ABI]"));
- if (flags & EF_OLD_ABI)
+ if (flags & EF_ARM_OLD_ABI)
fprintf (file, _(" [old ABI]"));
- if (flags & EF_SOFT_FLOAT)
+ if (flags & EF_ARM_SOFT_FLOAT)
fprintf (file, _(" [software FP]"));
- flags &= ~(EF_INTERWORK | EF_APCS_26 | EF_APCS_FLOAT | EF_PIC
- | EF_NEW_ABI | EF_OLD_ABI | EF_SOFT_FLOAT);
+ flags &= ~(EF_ARM_INTERWORK | EF_ARM_APCS_26 | EF_ARM_APCS_FLOAT | EF_ARM_PIC
+ | EF_ARM_NEW_ABI | EF_ARM_OLD_ABI | EF_ARM_SOFT_FLOAT);
break;
case EF_ARM_EABI_VER1:
flags &= ~ EF_ARM_SYMSARESORTED;
break;
+ case EF_ARM_EABI_VER2:
+ fprintf (file, _(" [Version2 EABI]"));
+
+ if (flags & EF_ARM_SYMSARESORTED)
+ fprintf (file, _(" [sorted symbol table]"));
+ else
+ fprintf (file, _(" [unsorted symbol table]"));
+
+ if (flags & EF_ARM_DYNSYMSUSESEGIDX)
+ fprintf (file, _(" [dynamic symbols use segment index]"));
+
+ if (flags & EF_ARM_MAPSYMSFIRST)
+ fprintf (file, _(" [mapping symbols precede others]"));
+
+ flags &= ~(EF_ARM_SYMSARESORTED | EF_ARM_DYNSYMSUSESEGIDX
+ | EF_ARM_MAPSYMSFIRST);
+ break;
+
default:
fprintf (file, _(" <EABI version unrecognised>"));
break;
got_offset = (plt_index + 3) * 4;
/* Fill in the entry in the procedure linkage table. */
- memcpy (splt->contents + h->plt.offset,
- elf32_arm_plt_entry,
- PLT_ENTRY_SIZE);
+ bfd_put_32 (output_bfd, elf32_arm_plt_entry[0],
+ splt->contents + h->plt.offset + 0);
+ bfd_put_32 (output_bfd, elf32_arm_plt_entry[1],
+ splt->contents + h->plt.offset + 4);
+ bfd_put_32 (output_bfd, elf32_arm_plt_entry[2],
+ splt->contents + h->plt.offset + 8);
bfd_put_32 (output_bfd,
(sgot->output_section->vma
+ sgot->output_offset
/* Mark the symbol as undefined, rather than as defined in
the .plt section. Leave the value alone. */
sym->st_shndx = SHN_UNDEF;
+ /* If the symbol is weak, we do need to clear the value.
+ Otherwise, the PLT entry would provide a definition for
+ the symbol even if the symbol wasn't defined anywhere,
+ and so the symbol would never be NULL. */
+ if ((h->elf_link_hash_flags & ELF_LINK_HASH_REF_REGULAR_NONWEAK)
+ == 0)
+ sym->st_value = 0;
}
}
/* Fill in the first entry in the procedure linkage table. */
if (splt->_raw_size > 0)
- memcpy (splt->contents, elf32_arm_plt0_entry, PLT_ENTRY_SIZE);
+ {
+ bfd_put_32 (output_bfd, elf32_arm_plt0_entry[0], splt->contents + 0);
+ bfd_put_32 (output_bfd, elf32_arm_plt0_entry[1], splt->contents + 4);
+ bfd_put_32 (output_bfd, elf32_arm_plt0_entry[2], splt->contents + 8);
+ bfd_put_32 (output_bfd, elf32_arm_plt0_entry[3], splt->contents + 12);
+ }
/* UnixWare sets the entsize of .plt to 4, although that doesn't
really seem like the right value. */
projects / deliverable / binutils-gdb.git / blobdiff