diff options
Diffstat (limited to 'contrib/binutils/bfd/reloc.c')
| -rw-r--r-- | contrib/binutils/bfd/reloc.c | 361 |
1 files changed, 212 insertions, 149 deletions
diff --git a/contrib/binutils/bfd/reloc.c b/contrib/binutils/bfd/reloc.c index c2a94ed..dda7624 100644 --- a/contrib/binutils/bfd/reloc.c +++ b/contrib/binutils/bfd/reloc.c @@ -1,5 +1,5 @@ /* 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. @@ -411,14 +411,14 @@ FUNCTION 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; { @@ -451,6 +451,110 @@ DESCRIPTION */ +/* +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 = (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 = (((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 @@ -721,75 +825,8 @@ space consuming. For each target: 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 @@ -983,6 +1020,7 @@ bfd_install_relocation (abfd, reloc_entry, data_start, data_start_offset, if (howto->special_function) { bfd_reloc_status_type cont; + /* XXX - The special_function calls haven't been fixed up to deal with creating new relocations and section contents. */ cont = howto->special_function (abfd, reloc_entry, symbol, @@ -1007,7 +1045,6 @@ bfd_install_relocation (abfd, reloc_entry, data_start, data_start_offset, else relocation = symbol->value; - reloc_target_output_section = symbol->section->output_section; /* Convert input-section-relative symbol value to absolute. */ @@ -1172,79 +1209,11 @@ space consuming. For each target: 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 @@ -1376,8 +1345,9 @@ space consuming. For each target: 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 @@ -1870,15 +1840,30 @@ ENUMX ENUMX BFD_RELOC_SPARC_WDISP19 ENUMX - BFD_RELOC_SPARC_GLOB_JMP -ENUMX BFD_RELOC_SPARC_7 ENUMX 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 - Some relocations we're using for SPARC V9 -- subject to change. + SPARC64 relocations ENUM BFD_RELOC_ALPHA_GPDISP_HI16 @@ -2022,9 +2007,12 @@ ENUMX BFD_RELOC_MIPS_CALL_HI16 ENUMX BFD_RELOC_MIPS_CALL_LO16 +COMMENT ENUMDOC MIPS ELF relocations. +COMMENT + ENUM BFD_RELOC_386_GOT32 ENUMX @@ -2221,7 +2209,29 @@ ENUMX ENUMDOC Hitachi SH relocs. Not all of these appear in object files. -COMMENT +ENUM + BFD_RELOC_THUMB_PCREL_BRANCH9 +ENUMX + BFD_RELOC_THUMB_PCREL_BRANCH12 +ENUMX + BFD_RELOC_THUMB_PCREL_BRANCH23 +ENUMDOC + Thumb 23-, 12- and 9-bit pc-relative branches. The lowest bit must + be zero and is not stored in the instruction. + +ENUM + BFD_RELOC_ARC_B22_PCREL +ENUMDOC + Argonaut RISC Core (ARC) relocs. + ARC 22 bit pc-relative branch. The lowest two bits must be zero and are + not stored in the instruction. The high 20 bits are installed in bits 26 + through 7 of the instruction. +ENUM + BFD_RELOC_ARC_B26 +ENUMDOC + ARC 26 bit absolute branch. The lowest two bits must be zero and are not + stored in the instruction. The high 24 bits are installed in bits 23 + through 0. COMMENT ENUM @@ -2289,6 +2299,51 @@ ENUMDOC This is a 16-bit reloc containing the small data area offset for use in add3, load, and store instructions. +ENUM + BFD_RELOC_V850_9_PCREL +ENUMDOC + This is a 9-bit reloc +ENUM + BFD_RELOC_V850_22_PCREL +ENUMDOC + This is a 22-bit reloc + +ENUM + BFD_RELOC_V850_SDA_16_16_OFFSET +ENUMDOC + This is a 16 bit offset from the short data area pointer. +ENUM + BFD_RELOC_V850_SDA_15_16_OFFSET +ENUMDOC + This is a 16 bit offset (of which only 15 bits are used) from the + short data area pointer. +ENUM + BFD_RELOC_V850_ZDA_16_16_OFFSET +ENUMDOC + This is a 16 bit offset from the zero data area pointer. +ENUM + BFD_RELOC_V850_ZDA_15_16_OFFSET +ENUMDOC + This is a 16 bit offset (of which only 15 bits are used) from the + zero data area pointer. +ENUM + BFD_RELOC_V850_TDA_6_8_OFFSET +ENUMDOC + This is an 8 bit offset (of which only 6 bits are used) from the + tiny data area pointer. +ENUM + BFD_RELOC_V850_TDA_7_8_OFFSET +ENUMDOC + This is an 8bit offset (of which only 7 bits are used) from the tiny + data area pointer. +ENUM + BFD_RELOC_V850_TDA_7_7_OFFSET +ENUMDOC + This is a 7 bit offset from the tiny data area pointer. +ENUM + BFD_RELOC_V850_TDA_16_16_OFFSET +ENUMDOC + This is a 16 bit offset from the tiny data area pointer. COMMENT ENUM @@ -2301,6 +2356,14 @@ ENUM 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. + ENDSENUM BFD_RELOC_UNUSED CODE_FRAGMENT |
