diff options
author | DJ Delorie <dj@redhat.com> | 2006-02-24 22:10:36 +0000 |
---|---|---|
committer | DJ Delorie <dj@redhat.com> | 2006-02-24 22:10:36 +0000 |
commit | 6772dd07c44296695b6b99e7a007ebb99948a364 (patch) | |
tree | 439d69e70ea80da38364e680912874faa3fd5283 /gas/config/tc-m32c.c | |
parent | ebdca51ad97f11dff355fb709a77403c8187be3f (diff) | |
download | gdb-6772dd07c44296695b6b99e7a007ebb99948a364.zip gdb-6772dd07c44296695b6b99e7a007ebb99948a364.tar.gz gdb-6772dd07c44296695b6b99e7a007ebb99948a364.tar.bz2 |
[include/elf]
* m32c.h: Add relax relocs.
[cpu]
* m32c.cpu (RL_TYPE): New attribute, with macros.
(Lab-8-24): Add RELAX.
(unary-insn-defn-g, binary-arith-imm-dst-defn,
binary-arith-imm4-dst-defn): Add 1ADDR attribute.
(binary-arith-src-dst-defn): Add 2ADDR attribute.
(jcnd16-5, jcnd16, jcnd32, jmp16.s, jmp16.b, jmp16.w, jmp16.a,
jmp32.s, jmp32.b, jmp32.w, jmp32.a, jsr16.w, jsr16.a): Add JUMP
attribute.
(jsri16, jsri32): Add 1ADDR attribute.
(jsr32.w, jsr32.a): Add JUMP attribute.
[opcodes]
* m32c-desc.c: Regenerate with linker relaxation attributes.
* m32c-desc.h: Likewise.
* m32c-dis.c: Likewise.
* m32c-opc.c: Likewise.
[gas]
* config/tc-m32c.h (md_apply_fix): Define to m32c_apply_fix.
(tc_gen_reloc): Don't define.
* config/tc-m32c.c (rl_for, relaxable): New convenience macros.
(OPTION_LINKRELAX): New.
(md_longopts): Add it.
(m32c_relax): New.
(md_parse_options): Set it.
(md_assemble): Emit relaxation relocs as needed.
(md_convert_frag): Emit relaxation relocs as needed.
(md_cgen_lookup_reloc): Add LAB_8_8 and LAB_8_16.
(m32c_apply_fix): New.
(tc_gen_reloc): New.
(m32c_force_relocation): Force out jump relocs when relaxing.
(m32c_fix_adjustable): Return false if relaxing.
[bfd]
* elf32-m32c.c (m32c_elf_howto_table): Add relaxation relocs.
(m32c_elf_relocate_section): Don't relocate them.
(compare_reloc): New.
(relax_reloc): Remove.
(m32c_offset_for_reloc): New.
(m16c_addr_encodings): New.
(m16c_jmpaddr_encodings): New.
(m32c_addr_encodings): New.
(m32c_elf_relax_section): Relax jumps and address displacements.
(m32c_elf_relax_delete_bytes): Adjust for internal syms. Fix up
short jumps.
* reloc.c: Add m32c relax relocs.
* libbfd.h: Regenerate.
Diffstat (limited to 'gas/config/tc-m32c.c')
-rw-r--r-- | gas/config/tc-m32c.c | 203 |
1 files changed, 198 insertions, 5 deletions
diff --git a/gas/config/tc-m32c.c b/gas/config/tc-m32c.c index 8f4f502..5f174d3 100644 --- a/gas/config/tc-m32c.c +++ b/gas/config/tc-m32c.c @@ -55,6 +55,9 @@ typedef struct } m32c_insn; +#define rl_for(insn) (CGEN_ATTR_CGEN_INSN_RL_TYPE_VALUE (&(insn.insn->base->attrs))) +#define relaxable(insn) (CGEN_ATTR_CGEN_INSN_RELAXABLE_VALUE (&(insn.insn->base->attrs))) + const char comment_chars[] = ";"; const char line_comment_chars[] = "#"; const char line_separator_chars[] = "|"; @@ -67,11 +70,13 @@ const char * md_shortopts = M32C_SHORTOPTS; /* assembler options */ #define OPTION_CPU_M16C (OPTION_MD_BASE) #define OPTION_CPU_M32C (OPTION_MD_BASE + 1) +#define OPTION_LINKRELAX (OPTION_MD_BASE + 2) struct option md_longopts[] = { { "m16c", no_argument, NULL, OPTION_CPU_M16C }, { "m32c", no_argument, NULL, OPTION_CPU_M32C }, + { "relax", no_argument, NULL, OPTION_LINKRELAX }, {NULL, no_argument, NULL, 0} }; size_t md_longopts_size = sizeof (md_longopts); @@ -84,6 +89,7 @@ size_t md_longopts_size = sizeof (md_longopts); static unsigned long m32c_mach = bfd_mach_m16c; static int cpu_mach = (1 << MACH_M16C); static int insn_size; +static int m32c_relax = 0; /* Flags to set in the elf header */ static flagword m32c_flags = DEFAULT_FLAGS; @@ -118,6 +124,10 @@ md_parse_option (int c, char * arg ATTRIBUTE_UNUSED) set_isa (ISA_M32C); break; + case OPTION_LINKRELAX: + m32c_relax = 1; + break; + default: return 0; } @@ -153,7 +163,7 @@ void md_begin (void) { /* Initialize the `cgen' interface. */ - + /* Set the machine number and endian. */ gas_cgen_cpu_desc = m32c_cgen_cpu_open (CGEN_CPU_OPEN_MACHS, cpu_mach, CGEN_CPU_OPEN_ENDIAN, @@ -320,6 +330,8 @@ md_assemble (char * str) static int last_insn_had_delay_slot = 0; m32c_insn insn; char * errmsg; + finished_insnS results; + int rl_type; if (m32c_mach == bfd_mach_m32c && m32c_indirect_operand (str)) return; @@ -336,13 +348,46 @@ md_assemble (char * str) return; } + results.num_fixups = 0; /* Doesn't really matter what we pass for RELAX_P here. */ gas_cgen_finish_insn (insn.insn, insn.buffer, - CGEN_FIELDS_BITSIZE (& insn.fields), 1, NULL); + CGEN_FIELDS_BITSIZE (& insn.fields), 1, &results); last_insn_had_delay_slot = CGEN_INSN_ATTR_VALUE (insn.insn, CGEN_INSN_DELAY_SLOT); insn_size = CGEN_INSN_BITSIZE(insn.insn); + + rl_type = rl_for (insn); + + /* We have to mark all the jumps, because we need to adjust them + when we delete bytes, but we only need to mark the displacements + if they're symbolic - if they're not, we've already picked the + shortest opcode by now. The linker, however, will still have to + check any operands to see if they're the displacement type, since + we don't know (nor record) *which* operands are relaxable. */ + if (m32c_relax + && rl_type != RL_TYPE_NONE + && (rl_type == RL_TYPE_JUMP || results.num_fixups) + && !relaxable (insn)) + { + int reloc = 0; + int addend = results.num_fixups + 16 * insn_size/8; + + switch (rl_for (insn)) + { + case RL_TYPE_JUMP: reloc = BFD_RELOC_M32C_RL_JUMP; break; + case RL_TYPE_1ADDR: reloc = BFD_RELOC_M32C_RL_1ADDR; break; + case RL_TYPE_2ADDR: reloc = BFD_RELOC_M32C_RL_2ADDR; break; + } + if (insn.insn->base->num == M32C_INSN_JMP16_S + || insn.insn->base->num == M32C_INSN_JMP32_S) + addend = 0x10; + + fix_new (results.frag, + results.addr - results.frag->fr_literal, + 0, abs_section_sym, addend, 0, + reloc); + } } /* The syntax in the manual says constants begin with '#'. @@ -551,18 +596,26 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, int operand; int new_insn; int where = fragP->fr_opcode - fragP->fr_literal; + int rl_where = fragP->fr_opcode - fragP->fr_literal; unsigned char *op = (unsigned char *)fragP->fr_opcode; + int op_base = 0; + int op_op = 0; + int rl_addend = 0; addend = target_address_for (fragP) - (fragP->fr_address + where); new_insn = subtype_mappings[fragP->fr_subtype].insn; fragP->fr_fix = where + subtype_mappings[fragP->fr_subtype].bytes; + op_base = 0; + switch (subtype_mappings[fragP->fr_subtype].insn) { case M32C_INSN_JCND16_5: op[1] = addend - 1; operand = M32C_OPERAND_LAB_8_8; + op_op = 1; + rl_addend = 0x21; break; case -M32C_MACRO_JCND16_5_W: @@ -574,6 +627,9 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, operand = M32C_OPERAND_LAB_8_16; where += 2; new_insn = M32C_INSN_JMP16_W; + op_base = 2; + op_op = 3; + rl_addend = 0x51; break; case -M32C_MACRO_JCND16_5_A: @@ -583,12 +639,18 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, operand = M32C_OPERAND_LAB_8_24; where += 2; new_insn = M32C_INSN_JMP16_A; + op_base = 2; + op_op = 3; + rl_addend = 0x61; break; case M32C_INSN_JCND16: op[2] = addend - 2; operand = M32C_OPERAND_LAB_16_8; + op_base = 0; + op_op = 2; + rl_addend = 0x31; break; case -M32C_MACRO_JCND16_W: @@ -600,6 +662,9 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, operand = M32C_OPERAND_LAB_8_16; where += 3; new_insn = M32C_INSN_JMP16_W; + op_base = 3; + op_op = 4; + rl_addend = 0x61; break; case -M32C_MACRO_JCND16_A: @@ -609,17 +674,26 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, operand = M32C_OPERAND_LAB_8_24; where += 3; new_insn = M32C_INSN_JMP16_A; + op_base = 3; + op_op = 4; + rl_addend = 0x71; break; case M32C_INSN_JMP16_S: op[0] = 0x60 | ((addend-2) & 0x07); operand = M32C_OPERAND_LAB_5_3; + op_base = 0; + op_op = 0; + rl_addend = 0x10; break; case M32C_INSN_JMP16_B: op[0] = 0xfe; op[1] = addend - 1; operand = M32C_OPERAND_LAB_8_8; + op_base = 0; + op_op = 1; + rl_addend = 0x21; break; case M32C_INSN_JMP16_W: @@ -627,6 +701,9 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, op[1] = addend - 1; op[2] = (addend - 1) >> 8; operand = M32C_OPERAND_LAB_8_16; + op_base = 0; + op_op = 1; + rl_addend = 0x31; break; case M32C_INSN_JMP16_A: @@ -635,11 +712,17 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, op[2] = 0; op[3] = 0; operand = M32C_OPERAND_LAB_8_24; + op_base = 0; + op_op = 1; + rl_addend = 0x41; break; case M32C_INSN_JCND32: op[1] = addend - 1; operand = M32C_OPERAND_LAB_8_8; + op_base = 0; + op_op = 1; + rl_addend = 0x21; break; case -M32C_MACRO_JCND32_W: @@ -651,6 +734,9 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, operand = M32C_OPERAND_LAB_8_16; where += 2; new_insn = M32C_INSN_JMP32_W; + op_base = 2; + op_op = 3; + rl_addend = 0x51; break; case -M32C_MACRO_JCND32_A: @@ -660,6 +746,9 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, operand = M32C_OPERAND_LAB_8_24; where += 2; new_insn = M32C_INSN_JMP32_A; + op_base = 2; + op_op = 3; + rl_addend = 0x61; break; @@ -668,12 +757,18 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, addend = ((addend-2) & 0x07); op[0] = 0x4a | (addend & 0x01) | ((addend << 3) & 0x30); operand = M32C_OPERAND_LAB32_JMP_S; + op_base = 0; + op_op = 0; + rl_addend = 0x10; break; case M32C_INSN_JMP32_B: op[0] = 0xbb; op[1] = addend - 1; operand = M32C_OPERAND_LAB_8_8; + op_base = 0; + op_op = 1; + rl_addend = 0x21; break; case M32C_INSN_JMP32_W: @@ -681,6 +776,9 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, op[1] = addend - 1; op[2] = (addend - 1) >> 8; operand = M32C_OPERAND_LAB_8_16; + op_base = 0; + op_op = 1; + rl_addend = 0x31; break; case M32C_INSN_JMP32_A: @@ -689,6 +787,9 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, op[2] = 0; op[3] = 0; operand = M32C_OPERAND_LAB_8_24; + op_base = 0; + op_op = 1; + rl_addend = 0x41; break; @@ -697,6 +798,9 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, op[1] = addend - 1; op[2] = (addend - 1) >> 8; operand = M32C_OPERAND_LAB_8_16; + op_base = 0; + op_op = 1; + rl_addend = 0x31; break; case M32C_INSN_JSR16_A: @@ -705,6 +809,9 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, op[2] = 0; op[3] = 0; operand = M32C_OPERAND_LAB_8_24; + op_base = 0; + op_op = 1; + rl_addend = 0x41; break; case M32C_INSN_JSR32_W: @@ -712,6 +819,9 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, op[1] = addend - 1; op[2] = (addend - 1) >> 8; operand = M32C_OPERAND_LAB_8_16; + op_base = 0; + op_op = 1; + rl_addend = 0x31; break; case M32C_INSN_JSR32_A: @@ -720,6 +830,9 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, op[2] = 0; op[3] = 0; operand = M32C_OPERAND_LAB_8_24; + op_base = 0; + op_op = 1; + rl_addend = 0x41; break; @@ -731,8 +844,21 @@ md_convert_frag (bfd * abfd ATTRIBUTE_UNUSED, abort(); } + if (m32c_relax) + { + if (operand != M32C_OPERAND_LAB_8_24) + fragP->fr_offset = (fragP->fr_address + where); + + fix_new (fragP, + rl_where, + 0, abs_section_sym, rl_addend, 0, + BFD_RELOC_M32C_RL_JUMP); + } + if (S_GET_SEGMENT (fragP->fr_symbol) != sec - || operand == M32C_OPERAND_LAB_8_24) + || operand == M32C_OPERAND_LAB_8_24 + || (m32c_relax && (operand != M32C_OPERAND_LAB_5_3 + && operand != M32C_OPERAND_LAB32_JMP_S))) { assert (fragP->fr_cgen.insn != 0); gas_cgen_record_fixup (fragP, @@ -786,11 +912,15 @@ md_cgen_lookup_reloc (const CGEN_INSN * insn ATTRIBUTE_UNUSED, } op_reloc_table[] = { /* PC-REL relocs for 8-bit fields. */ + { M32C_OPERAND_LAB_8_8, BFD_RELOC_8_PCREL, 1 }, { M32C_OPERAND_LAB_16_8, BFD_RELOC_8_PCREL, 2 }, { M32C_OPERAND_LAB_24_8, BFD_RELOC_8_PCREL, 3 }, { M32C_OPERAND_LAB_32_8, BFD_RELOC_8_PCREL, 4 }, { M32C_OPERAND_LAB_40_8, BFD_RELOC_8_PCREL, 5 }, + /* PC-REL relocs for 16-bit fields. */ + { M32C_OPERAND_LAB_8_16, BFD_RELOC_16_PCREL, 1 }, + /* Absolute relocs for 8-bit fields. */ { M32C_OPERAND_IMM_8_QI, BFD_RELOC_8, 1 }, { M32C_OPERAND_IMM_16_QI, BFD_RELOC_8, 2 }, @@ -890,6 +1020,38 @@ md_cgen_lookup_reloc (const CGEN_INSN * insn ATTRIBUTE_UNUSED, return BFD_RELOC_NONE; } +void +m32c_apply_fix (struct fix *f, valueT *t, segT s) +{ + if (f->fx_r_type == BFD_RELOC_M32C_RL_JUMP + || f->fx_r_type == BFD_RELOC_M32C_RL_1ADDR + || f->fx_r_type == BFD_RELOC_M32C_RL_2ADDR) + return; + gas_cgen_md_apply_fix (f, t, s); +} + +arelent * +tc_gen_reloc (asection *sec, fixS *fx) +{ + if (fx->fx_r_type == BFD_RELOC_M32C_RL_JUMP + || fx->fx_r_type == BFD_RELOC_M32C_RL_1ADDR + || fx->fx_r_type == BFD_RELOC_M32C_RL_2ADDR) + { + arelent * reloc; + + reloc = xmalloc (sizeof (* reloc)); + + reloc->sym_ptr_ptr = xmalloc (sizeof (asymbol *)); + *reloc->sym_ptr_ptr = symbol_get_bfdsym (fx->fx_addsy); + reloc->address = fx->fx_frag->fr_address + fx->fx_where; + reloc->howto = bfd_reloc_type_lookup (stdoutput, fx->fx_r_type); + reloc->addend = fx->fx_offset; + return reloc; + + } + return gas_cgen_tc_gen_reloc (sec, fx); +} + /* See whether we need to force a relocation into the output file. This is used to force out switch and PC relative relocations when relaxing. */ @@ -914,12 +1076,40 @@ m32c_force_relocation (fixS * fixp) case M32C_OPERAND_DSP_24_U16: case M32C_OPERAND_IMM_24_HI: return 1; + + /* If we're doing linker relaxing, we need to keep all the + pc-relative jumps in case we need to fix them due to + deleted bytes between the jump and its destination. */ + case M32C_OPERAND_LAB_8_8: + case M32C_OPERAND_LAB_8_16: + case M32C_OPERAND_LAB_8_24: + case M32C_OPERAND_LAB_16_8: + case M32C_OPERAND_LAB_24_8: + case M32C_OPERAND_LAB_32_8: + case M32C_OPERAND_LAB_40_8: + if (m32c_relax) + return 1; + default: + break; } } else { - if (fixp->fx_r_type == BFD_RELOC_16) - return 1; + switch (fixp->fx_r_type) + { + case BFD_RELOC_16: + return 1; + + case BFD_RELOC_M32C_RL_JUMP: + case BFD_RELOC_M32C_RL_1ADDR: + case BFD_RELOC_M32C_RL_2ADDR: + case BFD_RELOC_8_PCREL: + case BFD_RELOC_16_PCREL: + if (m32c_relax) + return 1; + default: + break; + } } return generic_force_reloc (fixp); @@ -1065,6 +1255,9 @@ m32c_fix_adjustable (fixS * fixP) if (S_GET_SEGMENT (fixP->fx_addsy)->flags & SEC_MERGE) return 0; + if (m32c_relax) + return 0; + return 1; } |