diff options
Diffstat (limited to 'gcc/dwarf2out.h')
| -rw-r--r-- | gcc/dwarf2out.h | 225 |
1 files changed, 225 insertions, 0 deletions
diff --git a/gcc/dwarf2out.h b/gcc/dwarf2out.h index ca2c26aea04..40cd848c5af 100644 --- a/gcc/dwarf2out.h +++ b/gcc/dwarf2out.h @@ -18,6 +18,229 @@ You should have received a copy of the GNU General Public License along with GCC; see the file COPYING3. If not see <http://www.gnu.org/licenses/>. */ +#ifndef GCC_DWARF2OUT_H +#define GCC_DWARF2OUT_H 1 + +#include "dwarf2.h" /* ??? Remove this once only used by dwarf2foo.c. */ + +typedef struct die_struct *dw_die_ref; +typedef const struct die_struct *const_dw_die_ref; + +typedef struct dw_val_struct *dw_val_ref; +typedef struct dw_cfi_struct *dw_cfi_ref; +typedef struct dw_loc_descr_struct *dw_loc_descr_ref; +typedef struct dw_loc_list_struct *dw_loc_list_ref; + + +/* Call frames are described using a sequence of Call Frame + Information instructions. The register number, offset + and address fields are provided as possible operands; + their use is selected by the opcode field. */ + +enum dw_cfi_oprnd_type { + dw_cfi_oprnd_unused, + dw_cfi_oprnd_reg_num, + dw_cfi_oprnd_offset, + dw_cfi_oprnd_addr, + dw_cfi_oprnd_loc +}; + +typedef union GTY(()) dw_cfi_oprnd_struct { + unsigned int GTY ((tag ("dw_cfi_oprnd_reg_num"))) dw_cfi_reg_num; + HOST_WIDE_INT GTY ((tag ("dw_cfi_oprnd_offset"))) dw_cfi_offset; + const char * GTY ((tag ("dw_cfi_oprnd_addr"))) dw_cfi_addr; + struct dw_loc_descr_struct * GTY ((tag ("dw_cfi_oprnd_loc"))) dw_cfi_loc; +} +dw_cfi_oprnd; + +typedef struct GTY(()) dw_cfi_struct { + enum dwarf_call_frame_info dw_cfi_opc; + dw_cfi_oprnd GTY ((desc ("dw_cfi_oprnd1_desc (%1.dw_cfi_opc)"))) + dw_cfi_oprnd1; + dw_cfi_oprnd GTY ((desc ("dw_cfi_oprnd2_desc (%1.dw_cfi_opc)"))) + dw_cfi_oprnd2; +} +dw_cfi_node; + +DEF_VEC_P (dw_cfi_ref); +DEF_VEC_ALLOC_P (dw_cfi_ref, heap); +DEF_VEC_ALLOC_P (dw_cfi_ref, gc); + +typedef VEC(dw_cfi_ref, gc) *cfi_vec; + +typedef struct dw_fde_struct *dw_fde_ref; + +/* All call frame descriptions (FDE's) in the GCC generated DWARF + refer to a single Common Information Entry (CIE), defined at + the beginning of the .debug_frame section. This use of a single + CIE obviates the need to keep track of multiple CIE's + in the DWARF generation routines below. */ + +typedef struct GTY(()) dw_fde_struct { + tree decl; + const char *dw_fde_begin; + const char *dw_fde_current_label; + const char *dw_fde_end; + const char *dw_fde_vms_end_prologue; + const char *dw_fde_vms_begin_epilogue; + const char *dw_fde_second_begin; + const char *dw_fde_second_end; + cfi_vec dw_fde_cfi; + int dw_fde_switch_cfi_index; /* Last CFI before switching sections. */ + HOST_WIDE_INT stack_realignment; + unsigned funcdef_number; + /* Dynamic realign argument pointer register. */ + unsigned int drap_reg; + /* Virtual dynamic realign argument pointer register. */ + unsigned int vdrap_reg; + /* These 3 flags are copied from rtl_data in function.h. */ + unsigned all_throwers_are_sibcalls : 1; + unsigned uses_eh_lsda : 1; + unsigned nothrow : 1; + /* Whether we did stack realign in this call frame. */ + unsigned stack_realign : 1; + /* Whether dynamic realign argument pointer register has been saved. */ + unsigned drap_reg_saved: 1; + /* True iff dw_fde_begin label is in text_section or cold_text_section. */ + unsigned in_std_section : 1; + /* True iff dw_fde_second_begin label is in text_section or + cold_text_section. */ + unsigned second_in_std_section : 1; +} +dw_fde_node; + + +/* This is how we define the location of the CFA. We use to handle it + as REG + OFFSET all the time, but now it can be more complex. + It can now be either REG + CFA_OFFSET or *(REG + BASE_OFFSET) + CFA_OFFSET. + Instead of passing around REG and OFFSET, we pass a copy + of this structure. */ +typedef struct cfa_loc { + HOST_WIDE_INT offset; + HOST_WIDE_INT base_offset; + unsigned int reg; + BOOL_BITFIELD indirect : 1; /* 1 if CFA is accessed via a dereference. */ + BOOL_BITFIELD in_use : 1; /* 1 if a saved cfa is stored here. */ +} dw_cfa_location; + + +/* Each DIE may have a series of attribute/value pairs. Values + can take on several forms. The forms that are used in this + implementation are listed below. */ + +enum dw_val_class +{ + dw_val_class_addr, + dw_val_class_offset, + dw_val_class_loc, + dw_val_class_loc_list, + dw_val_class_range_list, + dw_val_class_const, + dw_val_class_unsigned_const, + dw_val_class_const_double, + dw_val_class_vec, + dw_val_class_flag, + dw_val_class_die_ref, + dw_val_class_fde_ref, + dw_val_class_lbl_id, + dw_val_class_lineptr, + dw_val_class_str, + dw_val_class_macptr, + dw_val_class_file, + dw_val_class_data8, + dw_val_class_decl_ref, + dw_val_class_vms_delta +}; + +/* Describe a floating point constant value, or a vector constant value. */ + +typedef struct GTY(()) dw_vec_struct { + unsigned char * GTY((length ("%h.length"))) array; + unsigned length; + unsigned elt_size; +} +dw_vec_const; + +/* The dw_val_node describes an attribute's value, as it is + represented internally. */ + +typedef struct GTY(()) dw_val_struct { + enum dw_val_class val_class; + union dw_val_struct_union + { + rtx GTY ((tag ("dw_val_class_addr"))) val_addr; + unsigned HOST_WIDE_INT GTY ((tag ("dw_val_class_offset"))) val_offset; + dw_loc_list_ref GTY ((tag ("dw_val_class_loc_list"))) val_loc_list; + dw_loc_descr_ref GTY ((tag ("dw_val_class_loc"))) val_loc; + HOST_WIDE_INT GTY ((default)) val_int; + unsigned HOST_WIDE_INT GTY ((tag ("dw_val_class_unsigned_const"))) val_unsigned; + double_int GTY ((tag ("dw_val_class_const_double"))) val_double; + dw_vec_const GTY ((tag ("dw_val_class_vec"))) val_vec; + struct dw_val_die_union + { + dw_die_ref die; + int external; + } GTY ((tag ("dw_val_class_die_ref"))) val_die_ref; + unsigned GTY ((tag ("dw_val_class_fde_ref"))) val_fde_index; + struct indirect_string_node * GTY ((tag ("dw_val_class_str"))) val_str; + char * GTY ((tag ("dw_val_class_lbl_id"))) val_lbl_id; + unsigned char GTY ((tag ("dw_val_class_flag"))) val_flag; + struct dwarf_file_data * GTY ((tag ("dw_val_class_file"))) val_file; + unsigned char GTY ((tag ("dw_val_class_data8"))) val_data8[8]; + tree GTY ((tag ("dw_val_class_decl_ref"))) val_decl_ref; + struct dw_val_vms_delta_union + { + char * lbl1; + char * lbl2; + } GTY ((tag ("dw_val_class_vms_delta"))) val_vms_delta; + } + GTY ((desc ("%1.val_class"))) v; +} +dw_val_node; + +/* Locations in memory are described using a sequence of stack machine + operations. */ + +typedef struct GTY(()) dw_loc_descr_struct { + dw_loc_descr_ref dw_loc_next; + ENUM_BITFIELD (dwarf_location_atom) dw_loc_opc : 8; + /* Used to distinguish DW_OP_addr with a direct symbol relocation + from DW_OP_addr with a dtp-relative symbol relocation. */ + unsigned int dtprel : 1; + int dw_loc_addr; + dw_val_node dw_loc_oprnd1; + dw_val_node dw_loc_oprnd2; +} +dw_loc_descr_node; + + +/* Interface from dwarf2out.c to dwarf2cfi.c. */ +extern dw_fde_ref current_fde (void); +extern void output_cfi_directive (dw_cfi_ref); +extern struct dw_loc_descr_struct *build_cfa_loc + (dw_cfa_location *, HOST_WIDE_INT); +extern struct dw_loc_descr_struct *build_cfa_aligned_loc + (dw_cfa_location *, HOST_WIDE_INT offset, HOST_WIDE_INT alignment); +extern struct dw_loc_descr_struct *mem_loc_descriptor + (rtx, enum machine_mode mode, enum machine_mode mem_mode, + enum var_init_status); +extern enum machine_mode get_address_mode (rtx mem); + +/* Interface from dwarf2cfi.c to dwarf2out.c. */ +extern void dwarf2cfi_frame_init (void); +extern void dwarf2cfi_function_init (void); +extern void lookup_cfa_1 (dw_cfi_ref cfi, dw_cfa_location *loc, + dw_cfa_location *remember); +extern bool cfa_equal_p (const dw_cfa_location *, const dw_cfa_location *); + +extern GTY(()) cfi_vec cie_cfi_vec; + +/* Interface from dwarf2*.c to the rest of the compiler. */ +extern enum dw_cfi_oprnd_type dw_cfi_oprnd1_desc + (enum dwarf_call_frame_info cfi); +extern enum dw_cfi_oprnd_type dw_cfi_oprnd2_desc + (enum dwarf_call_frame_info cfi); + extern void dwarf2out_decl (tree); extern void dwarf2out_frame_debug (rtx, bool); extern void dwarf2out_frame_debug_init (void); @@ -47,3 +270,5 @@ struct array_descr_info tree stride; } dimen[10]; }; + +#endif /* GCC_DWARF2OUT_H */ |