diff options
Diffstat (limited to 'gdb/dwarf2expr.h')
| -rw-r--r-- | gdb/dwarf2expr.h | 173 |
1 files changed, 87 insertions, 86 deletions
diff --git a/gdb/dwarf2expr.h b/gdb/dwarf2expr.h index 4706bb3..63bdc6e 100644 --- a/gdb/dwarf2expr.h +++ b/gdb/dwarf2expr.h @@ -25,69 +25,6 @@ #include "leb128.h" #include "gdbtypes.h" -struct dwarf_expr_context; - -/* Virtual method table for struct dwarf_expr_context below. */ - -struct dwarf_expr_context_funcs -{ - /* Return the value of register number REGNUM (a DWARF register number), - read as an address. */ - CORE_ADDR (*read_addr_from_reg) (void *baton, int regnum); - - /* Return a value of type TYPE, stored in register number REGNUM - of the frame associated to the given BATON. - - REGNUM is a DWARF register number. */ - struct value *(*get_reg_value) (void *baton, struct type *type, int regnum); - - /* Read LENGTH bytes at ADDR into BUF. */ - void (*read_mem) (void *baton, gdb_byte *buf, CORE_ADDR addr, size_t length); - - /* Return the location expression for the frame base attribute, in - START and LENGTH. The result must be live until the current - expression evaluation is complete. */ - void (*get_frame_base) (void *baton, const gdb_byte **start, size_t *length); - - /* Return the CFA for the frame. */ - CORE_ADDR (*get_frame_cfa) (void *baton); - - /* Return the PC for the frame. */ - CORE_ADDR (*get_frame_pc) (void *baton); - - /* Return the thread-local storage address for - DW_OP_GNU_push_tls_address or DW_OP_form_tls_address. */ - CORE_ADDR (*get_tls_address) (void *baton, CORE_ADDR offset); - - /* Execute DW_AT_location expression for the DWARF expression subroutine in - the DIE at DIE_OFFSET in the CU from CTX. Do not touch STACK while it - being passed to and returned from the called DWARF subroutine. */ - void (*dwarf_call) (struct dwarf_expr_context *ctx, cu_offset die_offset); - - /* Return the base type given by the indicated DIE. This can throw - an exception if the DIE is invalid or does not represent a base - type. If can also be NULL in the special case where the - callbacks are not performing evaluation, and thus it is - meaningful to substitute a stub type of the correct size. */ - struct type *(*get_base_type) (struct dwarf_expr_context *ctx, cu_offset die); - - /* Push on DWARF stack an entry evaluated for DW_TAG_GNU_call_site's - parameter matching KIND and KIND_U at the caller of specified BATON. - If DEREF_SIZE is not -1 then use DW_AT_GNU_call_site_data_value instead of - DW_AT_GNU_call_site_value. */ - void (*push_dwarf_reg_entry_value) (struct dwarf_expr_context *ctx, - enum call_site_parameter_kind kind, - union call_site_parameter_u kind_u, - int deref_size); - - /* Return the address indexed by DW_OP_GNU_addr_index. - This can throw an exception if the index is out of range. */ - CORE_ADDR (*get_addr_index) (void *baton, unsigned int index); - - /* Return the `object address' for DW_OP_push_object_address. */ - CORE_ADDR (*get_object_address) (void *baton); -}; - /* The location of a value. */ enum dwarf_value_location { @@ -159,13 +96,6 @@ struct dwarf_expr_context /* Offset used to relocate DW_OP_addr and DW_OP_GNU_addr_index arguments. */ CORE_ADDR offset; - /* An opaque argument provided by the caller, which will be passed - to all of the callback functions. */ - void *baton; - - /* Callback functions. */ - const struct dwarf_expr_context_funcs *funcs; - /* The current depth of dwarf expression recursion, via DW_OP_call*, DW_OP_fbreg, DW_OP_push_object_address, etc., and the maximum depth we'll tolerate before raising an error. */ @@ -210,6 +140,93 @@ struct dwarf_expr_context int num_pieces; struct dwarf_expr_piece *pieces; + /* Return the value of register number REGNUM (a DWARF register number), + read as an address. */ + virtual CORE_ADDR read_addr_from_reg (int regnum) = 0; + + /* Return a value of type TYPE, stored in register number REGNUM + of the frame associated to the given BATON. + + REGNUM is a DWARF register number. */ + virtual struct value *get_reg_value (struct type *type, int regnum) = 0; + + /* Read LENGTH bytes at ADDR into BUF. */ + virtual void read_mem (gdb_byte *buf, CORE_ADDR addr, size_t length) = 0; + + /* Return the location expression for the frame base attribute, in + START and LENGTH. The result must be live until the current + expression evaluation is complete. */ + virtual void get_frame_base (const gdb_byte **start, size_t *length) + { + error (_("%s is invalid in this context"), "DW_OP_fbreg"); + } + + /* Return the CFA for the frame. */ + virtual CORE_ADDR get_frame_cfa () + { + error (_("%s is invalid in this context"), "DW_OP_call_frame_cfa"); + } + + /* Return the PC for the frame. */ + virtual CORE_ADDR get_frame_pc () + { + error (_("%s is invalid in this context"), "DW_OP_GNU_implicit_pointer"); + } + + /* Return the thread-local storage address for + DW_OP_GNU_push_tls_address or DW_OP_form_tls_address. */ + virtual CORE_ADDR get_tls_address (CORE_ADDR offset) + { + error (_("%s is invalid in this context"), "DW_OP_form_tls_address"); + } + + /* Execute DW_AT_location expression for the DWARF expression + subroutine in the DIE at DIE_OFFSET in the CU. Do not touch + STACK while it being passed to and returned from the called DWARF + subroutine. */ + virtual void dwarf_call (cu_offset die_offset) + { + error (_("%s is invalid in this context"), "DW_OP_call*"); + } + + /* Return the base type given by the indicated DIE. This can throw + an exception if the DIE is invalid or does not represent a base + type. If can also be NULL in the special case where the + callbacks are not performing evaluation, and thus it is + meaningful to substitute a stub type of the correct size. */ + virtual struct type *impl_get_base_type (cu_offset die) + { + /* Anything will do. */ + return builtin_type (this->gdbarch)->builtin_int; + } + + /* Push on DWARF stack an entry evaluated for DW_TAG_GNU_call_site's + parameter matching KIND and KIND_U at the caller of specified BATON. + If DEREF_SIZE is not -1 then use DW_AT_GNU_call_site_data_value instead of + DW_AT_GNU_call_site_value. */ + virtual void push_dwarf_reg_entry_value (enum call_site_parameter_kind kind, + union call_site_parameter_u kind_u, + int deref_size) + { + internal_error (__FILE__, __LINE__, + _("Support for DW_OP_GNU_entry_value is unimplemented")); + } + + /* Return the address indexed by DW_OP_GNU_addr_index. + This can throw an exception if the index is out of range. */ + virtual CORE_ADDR get_addr_index (unsigned int index) + { + error (_("%s is invalid in this context"), "DW_OP_GNU_addr_index"); + } + + /* Return the `object address' for DW_OP_push_object_address. */ + virtual CORE_ADDR get_object_address () + { + internal_error (__FILE__, __LINE__, + _("Support for DW_OP_push_object_address " + "is unimplemented")); + } + private: struct type *address_type () const; @@ -273,22 +290,6 @@ struct dwarf_expr_piece void dwarf_expr_require_composition (const gdb_byte *, const gdb_byte *, const char *); -/* Stub dwarf_expr_context_funcs implementations. */ - -void ctx_no_get_frame_base (void *baton, const gdb_byte **start, - size_t *length); -CORE_ADDR ctx_no_get_frame_cfa (void *baton); -CORE_ADDR ctx_no_get_frame_pc (void *baton); -CORE_ADDR ctx_no_get_tls_address (void *baton, CORE_ADDR offset); -void ctx_no_dwarf_call (struct dwarf_expr_context *ctx, cu_offset die_offset); -struct type *ctx_no_get_base_type (struct dwarf_expr_context *ctx, - cu_offset die); -void ctx_no_push_dwarf_reg_entry_value (struct dwarf_expr_context *ctx, - enum call_site_parameter_kind kind, - union call_site_parameter_u kind_u, - int deref_size); -CORE_ADDR ctx_no_get_addr_index (void *baton, unsigned int index); - int dwarf_block_to_dwarf_reg (const gdb_byte *buf, const gdb_byte *buf_end); int dwarf_block_to_dwarf_reg_deref (const gdb_byte *buf, |