diff options
Diffstat (limited to 'contrib/binutils/gas/cgen.c')
-rw-r--r-- | contrib/binutils/gas/cgen.c | 87 |
1 files changed, 36 insertions, 51 deletions
diff --git a/contrib/binutils/gas/cgen.c b/contrib/binutils/gas/cgen.c index 67b9b16..5ce7f4c 100644 --- a/contrib/binutils/gas/cgen.c +++ b/contrib/binutils/gas/cgen.c @@ -1,22 +1,22 @@ /* GAS interface for targets using CGEN: Cpu tools GENerator. - Copyright 1996, 1997, 1998, 1999, 2000, 2001 + Copyright 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2003 Free Software Foundation, Inc. -This file is part of GAS, the GNU Assembler. + This file is part of GAS, the GNU Assembler. -GAS is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. + GAS is free software; you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation; either version 2, or (at your option) + any later version. -GAS 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. + GAS 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 a copy of the GNU General Public License -along with GAS; see the file COPYING. If not, write to the Free Software -Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ + You should have received a copy of the GNU General Public License + along with GAS; see the file COPYING. If not, write to the Free Software + Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include <setjmp.h> #include "ansidecl.h" @@ -29,7 +29,7 @@ Foundation, 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */ #include "cgen.h" #include "dwarf2dbg.h" -static void queue_fixup PARAMS ((int, int, expressionS *)); +static void queue_fixup (int, int, expressionS *); /* Opcode table descriptor, must be set by md_begin. */ @@ -61,7 +61,8 @@ cgen_asm_record_register (name, number) OPINDEX is the index in the operand table. OPINFO is something the caller chooses to help in reloc determination. */ -struct fixup { +struct fixup +{ int opindex; int opinfo; expressionS exp; @@ -112,7 +113,7 @@ queue_fixup (opindex, opinfo, expP) gas_cgen_initialize_saved_fixups_array(): Sets num_fixups_in_chain to 0 for each element. Call this from md_begin() if you plan to use these functions and you want the - fixup count in each element to be set to 0 intially. This is + fixup count in each element to be set to 0 initially. This is not necessary, but it's included just in case. It performs the same function for each element in the array of fixup chains that gas_init_parse() performs for the current fixups. @@ -130,7 +131,8 @@ queue_fixup (opindex, opinfo, expP) element - swap the current fixups with those in this element number. */ -struct saved_fixups { +struct saved_fixups +{ struct fixup fixup_chain[GAS_CGEN_MAX_FIXUPS]; int num_fixups_in_chain; }; @@ -240,7 +242,6 @@ gas_cgen_record_fixup (frag, where, insn, length, operand, opinfo, symbol, offse /* It may seem strange to use operand->attrs and not insn->attrs here, but it is the operand that has a pc relative relocation. */ - fixP = fix_new (frag, where, length / 8, symbol, offset, CGEN_OPERAND_ATTR_VALUE (operand, CGEN_OPERAND_PCREL_ADDR), (bfd_reloc_code_real_type) @@ -279,7 +280,6 @@ gas_cgen_record_fixup_exp (frag, where, insn, length, operand, opinfo, exp) /* It may seem strange to use operand->attrs and not insn->attrs here, but it is the operand that has a pc relative relocation. */ - fixP = fix_new_exp (frag, where, length / 8, exp, CGEN_OPERAND_ATTR_VALUE (operand, CGEN_OPERAND_PCREL_ADDR), (bfd_reloc_code_real_type) @@ -431,7 +431,7 @@ gas_cgen_finish_insn (insn, buf, length, relax_p, result) Relaxable instructions: We need to ensure we allocate enough space for the largest insn. */ - if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAX)) + if (CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXED)) /* These currently shouldn't get here. */ abort (); @@ -531,7 +531,7 @@ gas_cgen_finish_insn (insn, buf, length, relax_p, result) cgen_operand_lookup_by_num (gas_cgen_cpu_desc, fixups[i].opindex); /* Don't create fixups for these. That's done during relaxation. - We don't need to test for CGEN_INSN_RELAX as they can't get here + We don't need to test for CGEN_INSN_RELAXED as they can't get here (see above). */ if (relax_p && CGEN_INSN_ATTR_VALUE (insn, CGEN_INSN_RELAXABLE) @@ -580,39 +580,12 @@ gas_cgen_md_apply_fix3 (fixP, valP, seg) /* Canonical name, since used a lot. */ CGEN_CPU_DESC cd = gas_cgen_cpu_desc; - /* FIXME FIXME FIXME: The value we are passed in *valuep includes - the symbol values. Since we are using BFD_ASSEMBLER, if we are - doing this relocation the code in write.c is going to call - bfd_install_relocation, which is also going to use the symbol - value. That means that if the reloc is fully resolved we want to - use *valuep since bfd_install_relocation is not being used. - However, if the reloc is not fully resolved we do not want to use - *valuep, and must use fx_offset instead. However, if the reloc - is PC relative, we do want to use *valuep since it includes the - result of md_pcrel_from. This is confusing. */ - if (fixP->fx_addsy == (symbolS *) NULL) fixP->fx_done = 1; - else if (fixP->fx_pcrel) - ; - - else - { - value = fixP->fx_offset; - - if (fixP->fx_subsy != (symbolS *) NULL) - { - if (S_GET_SEGMENT (fixP->fx_subsy) == absolute_section) - value -= S_GET_VALUE (fixP->fx_subsy); - else - { - /* We don't actually support subtracting a symbol. */ - as_bad_where (fixP->fx_file, fixP->fx_line, - _("expression too complex")); - } - } - } + /* We don't actually support subtracting a symbol. */ + if (fixP->fx_subsy != (symbolS *) NULL) + as_bad_where (fixP->fx_file, fixP->fx_line, _("expression too complex")); if ((int) fixP->fx_r_type >= (int) BFD_RELOC_UNUSED) { @@ -743,3 +716,15 @@ gas_cgen_tc_gen_reloc (section, fixP) reloc->address = fixP->fx_frag->fr_address + fixP->fx_where; return reloc; } + +/* Perform any cgen specific initialisation. + Called after gas_cgen_cpu_desc has been created. */ + +void +gas_cgen_begin () +{ + if (flag_signed_overflow_ok) + cgen_set_signed_overflow_ok (gas_cgen_cpu_desc); + else + cgen_clear_signed_overflow_ok (gas_cgen_cpu_desc); +} |