/* BFD support for handling relocation entries.
- Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 1997
+ Copyright (C) 1990, 91, 92, 93, 94, 95, 96, 97, 1998
Free Software Foundation, Inc.
Written by Cygnus Support.
bfd_get_reloc_size
SYNOPSIS
- int bfd_get_reloc_size (reloc_howto_type *);
+ unsigned int bfd_get_reloc_size (reloc_howto_type *);
DESCRIPTION
For a reloc_howto_type that operates on a fixed number of bytes,
this returns the number of bytes operated on.
*/
-int
+unsigned int
bfd_get_reloc_size (howto)
reloc_howto_type *howto;
{
*/
+/*
+FUNCTION
+ bfd_check_overflow
+
+SYNOPSIS
+ bfd_reloc_status_type
+ bfd_check_overflow
+ (enum complain_overflow how,
+ unsigned int bitsize,
+ unsigned int rightshift,
+ bfd_vma relocation);
+
+DESCRIPTION
+ Perform overflow checking on @var{relocation} which has @var{bitsize}
+ significant bits and will be shifted right by @var{rightshift} bits.
+ The result is either of @code{bfd_reloc_ok} or
+ @code{bfd_reloc_overflow}.
+
+*/
+
+bfd_reloc_status_type
+bfd_check_overflow (how, bitsize, rightshift, relocation)
+ enum complain_overflow how;
+ unsigned int bitsize, rightshift;
+ bfd_vma relocation;
+{
+ bfd_vma check;
+ bfd_reloc_status_type flag = bfd_reloc_ok;
+
+ /* Get the value that will be used for the relocation, but
+ starting at bit position zero. */
+ check = relocation >> rightshift;
+
+ switch (how)
+ {
+ case complain_overflow_dont:
+ break;
+
+ case complain_overflow_signed:
+ {
+ /* Assumes two's complement. */
+ bfd_signed_vma reloc_signed_max =
+ ((bfd_signed_vma) 1 << (bitsize - 1)) - 1;
+ bfd_signed_vma reloc_signed_min = ~reloc_signed_max;
+
+ /* The above right shift is incorrect for a signed value.
+ Fix it up by forcing on the upper bits. */
+ if (rightshift > 0
+ && (bfd_signed_vma) relocation < 0)
+ check |= ((bfd_vma) - 1
+ & ~((bfd_vma) - 1
+ >> rightshift));
+ if ((bfd_signed_vma) check > reloc_signed_max
+ || (bfd_signed_vma) check < reloc_signed_min)
+ flag = bfd_reloc_overflow;
+ }
+ break;
+
+ case complain_overflow_unsigned:
+ {
+ /* Assumes two's complement. This expression avoids
+ overflow if `bitsize' is the number of bits in
+ bfd_vma. */
+ bfd_vma reloc_unsigned_max =
+ ((((bfd_vma) 1 << (bitsize - 1)) - 1) << 1) | 1;
+
+ if ((bfd_vma) check > reloc_unsigned_max)
+ flag = bfd_reloc_overflow;
+ }
+ break;
+
+ case complain_overflow_bitfield:
+ {
+ /* Assumes two's complement. This expression avoids
+ overflow if `bitsize' is the number of bits in
+ bfd_vma. */
+ bfd_vma reloc_bits = (((1 << (bitsize - 1)) - 1) << 1) | 1;
+
+ if (((bfd_vma) check & ~reloc_bits) != 0
+ && ((bfd_vma) check & ~reloc_bits) != (-1 & ~reloc_bits))
+ {
+ /* The above right shift is incorrect for a signed
+ value. See if turning on the upper bits fixes the
+ overflow. */
+ if (rightshift > 0
+ && (bfd_signed_vma) relocation < 0)
+ {
+ check |= ((bfd_vma) - 1
+ & ~((bfd_vma) - 1
+ >> rightshift));
+ if (((bfd_vma) check & ~reloc_bits) != (-1 & ~reloc_bits))
+ flag = bfd_reloc_overflow;
+ }
+ else
+ flag = bfd_reloc_overflow;
+ }
+ }
+ break;
+
+ default:
+ abort ();
+ }
+
+ return flag;
+}
+
/*
FUNCTION
adding in the value contained in the object file. */
if (howto->complain_on_overflow != complain_overflow_dont
&& flag == bfd_reloc_ok)
- {
- bfd_vma check;
-
- /* Get the value that will be used for the relocation, but
- starting at bit position zero. */
- check = relocation >> howto->rightshift;
- switch (howto->complain_on_overflow)
- {
- case complain_overflow_signed:
- {
- /* Assumes two's complement. */
- bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
- bfd_signed_vma reloc_signed_min = ~reloc_signed_max;
-
- /* The above right shift is incorrect for a signed value.
- Fix it up by forcing on the upper bits. */
- if (howto->rightshift > 0
- && (bfd_signed_vma) relocation < 0)
- check |= ((bfd_vma) - 1
- & ~((bfd_vma) - 1
- >> howto->rightshift));
- if ((bfd_signed_vma) check > reloc_signed_max
- || (bfd_signed_vma) check < reloc_signed_min)
- flag = bfd_reloc_overflow;
- }
- break;
- case complain_overflow_unsigned:
- {
- /* Assumes two's complement. This expression avoids
- overflow if howto->bitsize is the number of bits in
- bfd_vma. */
- bfd_vma reloc_unsigned_max =
- (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
-
- if ((bfd_vma) check > reloc_unsigned_max)
- flag = bfd_reloc_overflow;
- }
- break;
- case complain_overflow_bitfield:
- {
- /* Assumes two's complement. This expression avoids
- overflow if howto->bitsize is the number of bits in
- bfd_vma. */
- bfd_vma reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
-
- if (((bfd_vma) check & ~reloc_bits) != 0
- && ((bfd_vma) check & ~reloc_bits) != (-1 & ~reloc_bits))
- {
- /* The above right shift is incorrect for a signed
- value. See if turning on the upper bits fixes the
- overflow. */
- if (howto->rightshift > 0
- && (bfd_signed_vma) relocation < 0)
- {
- check |= ((bfd_vma) - 1
- & ~((bfd_vma) - 1
- >> howto->rightshift));
- if (((bfd_vma) check & ~reloc_bits) != (-1 & ~reloc_bits))
- flag = bfd_reloc_overflow;
- }
- else
- flag = bfd_reloc_overflow;
- }
- }
- break;
- default:
- abort ();
- }
- }
+ flag = bfd_check_overflow (howto->complain_on_overflow, howto->bitsize,
+ howto->rightshift, relocation);
/*
Either we are relocating all the way, or we don't want to apply
need to compute the value in a size larger than bitsize, but we
can't reasonably do that for a reloc the same size as a host
machine word.
-
FIXME: We should also do overflow checking on the result after
adding in the value contained in the object file. */
if (howto->complain_on_overflow != complain_overflow_dont)
- {
- bfd_vma check;
-
- /* Get the value that will be used for the relocation, but
- starting at bit position zero. */
- check = relocation >> howto->rightshift;
- switch (howto->complain_on_overflow)
- {
- case complain_overflow_signed:
- {
- /* Assumes two's complement. */
- bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
- bfd_signed_vma reloc_signed_min = ~reloc_signed_max;
-
- /* The above right shift is incorrect for a signed value.
- Fix it up by forcing on the upper bits. */
- if (howto->rightshift > 0
- && (bfd_signed_vma) relocation < 0)
- check |= ((bfd_vma) - 1
- & ~((bfd_vma) - 1
- >> howto->rightshift));
- if ((bfd_signed_vma) check > reloc_signed_max
- || (bfd_signed_vma) check < reloc_signed_min)
- flag = bfd_reloc_overflow;
- }
- break;
- case complain_overflow_unsigned:
- {
- /* Assumes two's complement. This expression avoids
- overflow if howto->bitsize is the number of bits in
- bfd_vma. */
- bfd_vma reloc_unsigned_max =
- (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
-
- if ((bfd_vma) check > reloc_unsigned_max)
- flag = bfd_reloc_overflow;
- }
- break;
- case complain_overflow_bitfield:
- {
- /* Assumes two's complement. This expression avoids
- overflow if howto->bitsize is the number of bits in
- bfd_vma. */
- bfd_vma reloc_bits = (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
-
- if (((bfd_vma) check & ~reloc_bits) != 0
- && ((bfd_vma) check & ~reloc_bits) != (-1 & ~reloc_bits))
- {
- /* The above right shift is incorrect for a signed
- value. See if turning on the upper bits fixes the
- overflow. */
- if (howto->rightshift > 0
- && (bfd_signed_vma) relocation < 0)
- {
- check |= ((bfd_vma) - 1
- & ~((bfd_vma) - 1
- >> howto->rightshift));
- if (((bfd_vma) check & ~reloc_bits) != (-1 & ~reloc_bits))
- flag = bfd_reloc_overflow;
- }
- else
- flag = bfd_reloc_overflow;
- }
- }
- break;
- default:
- abort ();
- }
- }
+ flag = bfd_check_overflow (howto->complain_on_overflow, howto->bitsize,
+ howto->rightshift, relocation);
/*
Either we are relocating all the way, or we don't want to apply
bfd_perform_relocation is so hacked up it is easier to write a new
function than to try to deal with it.
- This routine does a final relocation. It should not be used when
- generating relocateable output.
+ This routine does a final relocation. Whether it is useful for a
+ relocateable link depends upon how the object format defines
+ relocations.
FIXME: This routine ignores any special_function in the HOWTO,
since the existing special_function values have been written for
case complain_overflow_signed:
{
/* Assumes two's complement. */
- bfd_signed_vma reloc_signed_max = (1 << (howto->bitsize - 1)) - 1;
+ bfd_signed_vma reloc_signed_max =
+ ((bfd_signed_vma) 1 << (howto->bitsize - 1)) - 1;
bfd_signed_vma reloc_signed_min = ~reloc_signed_max;
if (signed_check > reloc_signed_max
overflow if howto->bitsize is the number of bits in
bfd_vma. */
bfd_vma reloc_unsigned_max =
- (((1 << (howto->bitsize - 1)) - 1) << 1) | 1;
+ ((((bfd_vma) 1 << (howto->bitsize - 1)) - 1) << 1) | 1;
if (check > reloc_unsigned_max)
overflow = true;
BFD_RELOC_SPARC_6
ENUMX
BFD_RELOC_SPARC_5
+ENUMEQX
+ BFD_RELOC_SPARC_DISP64
+ BFD_RELOC_64_PCREL
+ENUMX
+ BFD_RELOC_SPARC_PLT64
+ENUMX
+ BFD_RELOC_SPARC_HIX22
+ENUMX
+ BFD_RELOC_SPARC_LOX10
+ENUMX
+ BFD_RELOC_SPARC_H44
+ENUMX
+ BFD_RELOC_SPARC_M44
+ENUMX
+ BFD_RELOC_SPARC_L44
+ENUMX
+ BFD_RELOC_SPARC_REGISTER
+ENUMDOC
+ SPARC64 relocations
+
+ENUM
+ BFD_RELOC_SPARC_32LE
ENUMDOC
- Some relocations we're using for SPARC V9 -- subject to change.
+ SPARC little endian relocation
ENUM
BFD_RELOC_ALPHA_GPDISP_HI16
BFD_RELOC_MIPS_CALL_HI16
ENUMX
BFD_RELOC_MIPS_CALL_LO16
+COMMENT
+{* start-sanitize-r5900 *}
+ENUMX
+ BFD_RELOC_MIPS15_S3
+COMMENT
+{* end-sanitize-r5900 *}
ENUMDOC
MIPS ELF relocations.
+COMMENT
+{* start-sanitize-sky *}
+ENUM
+ BFD_RELOC_MIPS_DVP_11_PCREL
+ENUMDOC
+ MIPS DVP Relocations.
+ This is an 11-bit pc relative reloc. The recorded address is for the
+ lower instruction word, and the value is in 128 bit units.
+ENUM
+ BFD_RELOC_MIPS_DVP_27_S4
+ENUMDOC
+ This is a 27 bit address left shifted by 4.
+ENUM
+ BFD_RELOC_MIPS_DVP_11_S4
+ENUMDOC
+ This is the 11 bit offset operand of ilw/stw instructions
+ left shifted by 4.
+ENUM
+ BFD_RELOC_MIPS_DVP_U15_S3
+ENUMDOC
+ This is the 15 bit unsigned immediate operand of the iaddiu instruction
+ left shifted by 3.
+COMMENT
+{* end-sanitize-sky *}
+
ENUM
BFD_RELOC_386_GOT32
ENUMX
stored in the instruction. The high 24 bits are installed in bits 23
through 0.
-COMMENT
ENUM
BFD_RELOC_D10V_10_PCREL_R
ENUMDOC
ENUMDOC
This is an 18-bit reloc with the right 2 bits
assumed to be 0.
-COMMENT
-COMMENT
-{* start-sanitize-d30v *}
ENUM
BFD_RELOC_D30V_6
ENUMDOC
BFD_RELOC_D30V_32_PCREL
ENUMDOC
This is a 32-bit pc-relative reloc.
-COMMENT
-{* end-sanitize-d30v *}
ENUM
BFD_RELOC_M32R_24
ENUMDOC
This is a 16bit pcrel reloc for the mn10300, offset by two bytes in the
instruction.
+
+ENUM
+ BFD_RELOC_TIC30_LDP
+ENUMDOC
+ This is a 8bit DP reloc for the tms320c30, where the most
+ significant 8 bits of a 24 bit word are placed into the least
+ significant 8 bits of the opcode.
+
+ENUM
+ BFD_RELOC_VTABLE_INHERIT
+ENUMX
+ BFD_RELOC_VTABLE_ENTRY
+ENUMDOC
+ These two relocations are used by the linker to determine which of
+ the entries in a C++ virtual function table are actually used. When
+ the --gc-sections option is given, the linker will zero out the entries
+ that are not used, so that the code for those functions need not be
+ included in the output.
+
+ VTABLE_INHERIT is a zero-space relocation used to describe to the
+ linker the inheritence tree of a C++ virtual function table. The
+ relocation's symbol should be the parent class' vtable, and the
+ relocation should be located at the child vtable.
+
+ VTABLE_ENTRY is a zero-space relocation that describes the use of a
+ virtual function table entry. The reloc's symbol should refer to the
+ table of the class mentioned in the code. Off of that base, an offset
+ describes the entry that is being used. For Rela hosts, this offset
+ is stored in the reloc's addend. For Rel hosts, we are forced to put
+ this offset in the reloc's section offset.
+
ENDSENUM
BFD_RELOC_UNUSED
CODE_FRAGMENT
return true;
}
+/*
+INTERNAL_FUNCTION
+ bfd_generic_gc_sections
+
+SYNOPSIS
+ boolean bfd_generic_gc_sections
+ (bfd *, struct bfd_link_info *);
+
+DESCRIPTION
+ Provides default handling for relaxing for back ends which
+ don't do section gc -- i.e., does nothing.
+*/
+
+/*ARGSUSED*/
+boolean
+bfd_generic_gc_sections (abfd, link_info)
+ bfd *abfd;
+ struct bfd_link_info *link_info;
+{
+ return true;
+}
+
/*
INTERNAL_FUNCTION
bfd_generic_get_relocated_section_contents
projects / deliverable / binutils-gdb.git / blobdiff