diff options
Diffstat (limited to 'gcc/config/darwin.c')
| -rw-r--r-- | gcc/config/darwin.c | 87 |
1 files changed, 49 insertions, 38 deletions
diff --git a/gcc/config/darwin.c b/gcc/config/darwin.c index 6525bddba10..920c4784452 100644 --- a/gcc/config/darwin.c +++ b/gcc/config/darwin.c @@ -66,7 +66,7 @@ Boston, MA 02110-1301, USA. */ allows all uses of the old name to forward to the replacement, including existing function pointers and virtual methods. See rs6000_emit_prologue for the code that handles the nop insertions. - + The added indirection allows gdb to redirect accesses to static symbols from the newly loaded translation unit to the existing symbol, if any. @code{static} symbols are special and are handled by @@ -89,7 +89,7 @@ output_objc_section_asm_op (const void *directive) if (! been_here) { - static const enum darwin_section_enum tomark[] = + static const enum darwin_section_enum tomark[] = { /* written, cold -> hot */ objc_cat_cls_meth_section, @@ -115,7 +115,7 @@ output_objc_section_asm_op (const void *directive) objc_symbols_section }; size_t i; - + been_here = true; for (i = 0; i < ARRAY_SIZE (tomark); i++) switch_to_section (darwin_sections[tomark[i]]); @@ -190,10 +190,10 @@ machopic_classify_symbol (rtx sym_ref) flags = SYMBOL_REF_FLAGS (sym_ref); function_p = SYMBOL_REF_FUNCTION_P (sym_ref); if (machopic_symbol_defined_p (sym_ref)) - return (function_p + return (function_p ? MACHOPIC_DEFINED_FUNCTION : MACHOPIC_DEFINED_DATA); else - return (function_p + return (function_p ? MACHOPIC_UNDEFINED_FUNCTION : MACHOPIC_UNDEFINED_DATA); } @@ -256,7 +256,7 @@ void machopic_define_symbol (rtx mem) { rtx sym_ref; - + gcc_assert (GET_CODE (mem) == MEM); sym_ref = XEXP (mem, 0); SYMBOL_REF_FLAGS (sym_ref) |= MACHO_SYMBOL_FLAG_DEFINED; @@ -287,7 +287,7 @@ machopic_function_base_sym (void) rtx sym_ref; sym_ref = gen_rtx_SYMBOL_REF (Pmode, machopic_function_base_name ()); - SYMBOL_REF_FLAGS (sym_ref) + SYMBOL_REF_FLAGS (sym_ref) |= (MACHO_SYMBOL_FLAG_VARIABLE | MACHO_SYMBOL_FLAG_DEFINED); return sym_ref; } @@ -344,7 +344,7 @@ typedef struct machopic_indirection GTY (()) /* A table mapping stub names and non-lazy pointer names to SYMBOL_REFs for the stubbed-to and pointed-to entities. */ -static GTY ((param_is (struct machopic_indirection))) htab_t +static GTY ((param_is (struct machopic_indirection))) htab_t machopic_indirections; /* Return a hash value for a SLOT in the indirections hash table. */ @@ -396,7 +396,7 @@ machopic_indirection_name (rtx sym_ref, bool stub_p) namelen = strlen (name); } } - + if (name[0] == '*') { saw_star = true; @@ -427,11 +427,11 @@ machopic_indirection_name (rtx sym_ref, bool stub_p) sprintf (buffer, "&%sL%s%s%s%s", quote, prefix, name, suffix, quote); if (!machopic_indirections) - machopic_indirections = htab_create_ggc (37, + machopic_indirections = htab_create_ggc (37, machopic_indirection_hash, machopic_indirection_eq, /*htab_del=*/NULL); - + slot = htab_find_slot_with_hash (machopic_indirections, buffer, htab_hash_string (buffer), INSERT); if (*slot) @@ -447,7 +447,7 @@ machopic_indirection_name (rtx sym_ref, bool stub_p) p->used = false; *slot = p; } - + return p->ptr_name; } @@ -469,15 +469,15 @@ void machopic_validate_stub_or_non_lazy_ptr (const char *name) { machopic_indirection *p; - - p = ((machopic_indirection *) + + p = ((machopic_indirection *) (htab_find_with_hash (machopic_indirections, name, htab_hash_string (name)))); if (p && ! p->used) { const char *real_name; tree id; - + p->used = true; /* Do what output_addr_const will do when we actually call it. */ @@ -485,7 +485,7 @@ machopic_validate_stub_or_non_lazy_ptr (const char *name) mark_decl_referenced (SYMBOL_REF_DECL (p->symbol)); real_name = targetm.strip_name_encoding (XSTR (p->symbol, 0)); - + id = maybe_get_identifier (real_name); if (id) mark_referenced (id); @@ -556,7 +556,7 @@ machopic_indirect_data_reference (rtx orig, rtx reg) } ptr_ref = (gen_rtx_SYMBOL_REF - (Pmode, + (Pmode, machopic_indirection_name (orig, /*stub_p=*/false))); SYMBOL_REF_DECL (ptr_ref) = SYMBOL_REF_DECL (orig); @@ -633,17 +633,17 @@ machopic_indirect_call_target (rtx target) if (GET_CODE (target) != MEM) return target; - if (MACHOPIC_INDIRECT + if (MACHOPIC_INDIRECT && GET_CODE (XEXP (target, 0)) == SYMBOL_REF && !(SYMBOL_REF_FLAGS (XEXP (target, 0)) & MACHO_SYMBOL_FLAG_DEFINED)) { rtx sym_ref = XEXP (target, 0); - const char *stub_name = machopic_indirection_name (sym_ref, + const char *stub_name = machopic_indirection_name (sym_ref, /*stub_p=*/true); enum machine_mode mode = GET_MODE (sym_ref); tree decl = SYMBOL_REF_DECL (sym_ref); - + XEXP (target, 0) = gen_rtx_SYMBOL_REF (mode, stub_name); SYMBOL_REF_DECL (XEXP (target, 0)) = decl; MEM_READONLY_P (target) = 1; @@ -727,7 +727,7 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) rtx mem; rtx insn; rtx sum; - + sum = gen_rtx_HIGH (Pmode, offset); if (! MACHO_DYNAMIC_NO_PIC_P) sum = gen_rtx_PLUS (Pmode, pic_offset_table_rtx, sum); @@ -735,21 +735,21 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) emit_insn (gen_rtx_SET (Pmode, hi_sum_reg, sum)); mem = gen_const_mem (GET_MODE (orig), - gen_rtx_LO_SUM (Pmode, + gen_rtx_LO_SUM (Pmode, hi_sum_reg, offset)); insn = emit_insn (gen_rtx_SET (VOIDmode, reg, mem)); - REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref, + REG_NOTES (insn) = gen_rtx_EXPR_LIST (REG_EQUAL, pic_ref, REG_NOTES (insn)); pic_ref = reg; #else emit_insn (gen_rtx_USE (VOIDmode, - gen_rtx_REG (Pmode, + gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM))); emit_insn (gen_rtx_SET (VOIDmode, reg, gen_rtx_HIGH (Pmode, - gen_rtx_CONST (Pmode, + gen_rtx_CONST (Pmode, offset)))); emit_insn (gen_rtx_SET (VOIDmode, reg, gen_rtx_LO_SUM (Pmode, reg, @@ -769,7 +769,7 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) } #if 0 emit_insn (gen_rtx_USE (VOIDmode, - gen_rtx_REG (Pmode, + gen_rtx_REG (Pmode, PIC_OFFSET_TABLE_REGNUM))); #endif @@ -807,7 +807,7 @@ machopic_legitimize_pic_address (rtx orig, enum machine_mode mode, rtx reg) ? gen_rtx_HIGH (Pmode, offset) : gen_rtx_PLUS (Pmode, pic_offset_table_rtx, - gen_rtx_HIGH (Pmode, + gen_rtx_HIGH (Pmode, offset)))); emit_insn (gen_rtx_SET (VOIDmode, reg, gen_rtx_LO_SUM (Pmode, @@ -929,14 +929,14 @@ machopic_output_indirection (void **slot, void *data) rtx symbol; const char *sym_name; const char *ptr_name; - + if (!p->used) return 1; symbol = p->symbol; sym_name = XSTR (symbol, 0); ptr_name = p->ptr_name; - + if (p->stub_p) { char *sym; @@ -988,11 +988,11 @@ machopic_output_indirection (void **slot, void *data) switch_to_section (darwin_sections[machopic_nl_symbol_ptr_section]); assemble_name (asm_out_file, ptr_name); fprintf (asm_out_file, ":\n"); - + fprintf (asm_out_file, "\t.indirect_symbol "); assemble_name (asm_out_file, sym_name); fprintf (asm_out_file, "\n"); - + /* Variables that are marked with MACHO_SYMBOL_STATIC need to have their symbol name instead of 0 in the second entry of the non-lazy symbol pointer data structure when they are @@ -1007,7 +1007,7 @@ machopic_output_indirection (void **slot, void *data) assemble_integer (init, GET_MODE_SIZE (Pmode), GET_MODE_ALIGNMENT (Pmode), 1); } - + return 1; } @@ -1273,14 +1273,14 @@ darwin_globalize_label (FILE *stream, const char *name) } void -darwin_asm_named_section (const char *name, +darwin_asm_named_section (const char *name, unsigned int flags ATTRIBUTE_UNUSED, tree decl ATTRIBUTE_UNUSED) { fprintf (asm_out_file, "\t.section %s\n", name); } -void +void darwin_unique_section (tree decl ATTRIBUTE_UNUSED, int reloc ATTRIBUTE_UNUSED) { /* Darwin does not use unique sections. */ @@ -1313,12 +1313,12 @@ no_dead_strip (FILE *file, const char *lab) fprintf (file, ".no_dead_strip %s\n", lab); } -/* Emit a label for an FDE, making it global and/or weak if appropriate. +/* Emit a label for an FDE, making it global and/or weak if appropriate. The third parameter is nonzero if this is for exception handling. The fourth parameter is nonzero if this is just a placeholder for an FDE that we are omitting. */ -void +void darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) { tree id = DECL_ASSEMBLER_NAME (decl) @@ -1377,7 +1377,18 @@ darwin_emit_unwind_label (FILE *file, tree decl, int for_eh, int empty) free (lab); } -/* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ +static GTY(()) unsigned long except_table_label_num; + +void +darwin_emit_except_table_label (FILE *file) +{ + char section_start_label[30]; + + ASM_GENERATE_INTERNAL_LABEL (section_start_label, "GCC_except_table", + except_table_label_num++); + ASM_OUTPUT_LABEL (file, section_start_label); +} +/* Generate a PC-relative reference to a Mach-O non-lazy-symbol. */ void darwin_non_lazy_pcrel (FILE *file, rtx addr) @@ -1398,7 +1409,7 @@ darwin_non_lazy_pcrel (FILE *file, rtx addr) extern". There is no MACH-O equivalent of ELF's VISIBILITY_INTERNAL or VISIBILITY_PROTECTED. */ -void +void darwin_assemble_visibility (tree decl, int vis) { if (vis == VISIBILITY_DEFAULT) |