diff options
Diffstat (limited to 'gdb/dwarf2loc.c')
| -rw-r--r-- | gdb/dwarf2loc.c | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/gdb/dwarf2loc.c b/gdb/dwarf2loc.c index 7deb08e..bf589a2 100644 --- a/gdb/dwarf2loc.c +++ b/gdb/dwarf2loc.c @@ -265,8 +265,89 @@ dwarf2_evaluate_loc_desc (struct symbol *var, struct frame_info *frame, return retval; } +// begin ARC +static CORE_ADDR +dwarf2_find_address (struct symbol *var, struct frame_info *frame, + gdb_byte *data, unsigned short size, + struct objfile *objfile) +{ + struct gdbarch *arch = get_frame_arch (frame); + struct value *retval; + struct dwarf_expr_baton baton; + struct dwarf_expr_context *ctx; + CORE_ADDR address; + + /* optimised out */ + if (size == 0) + return 0; + + baton.frame = frame; + baton.objfile = objfile; + + ctx = new_dwarf_expr_context (); + ctx->baton = &baton; + ctx->read_reg = dwarf_expr_read_reg; + ctx->read_mem = dwarf_expr_read_mem; + ctx->get_frame_base = dwarf_expr_frame_base; + ctx->get_tls_address = dwarf_expr_tls_address; + + dwarf_expr_eval (ctx, data, size); + if (ctx->num_pieces > 0) + { + /* what should we do here? */ + address = 0; + } + else if (ctx->in_reg) + address = 0; + else + address = dwarf_expr_fetch (ctx, 0); + + free_dwarf_expr_context (ctx); + + return address; +} +static unsigned int +dwarf2_find_size (struct symbol *var, struct frame_info *frame, + gdb_byte *data, unsigned short size, + struct objfile *objfile) +{ + struct gdbarch *arch = get_frame_arch (frame); + struct dwarf_expr_baton baton; + struct dwarf_expr_context *ctx; + unsigned int sz; + + /* optimised out */ + if (size == 0) + return 0; + + baton.frame = frame; + baton.objfile = objfile; + + ctx = new_dwarf_expr_context (); + ctx->baton = &baton; + ctx->read_reg = dwarf_expr_read_reg; + ctx->read_mem = dwarf_expr_read_mem; + ctx->get_frame_base = dwarf_expr_frame_base; + ctx->get_tls_address = dwarf_expr_tls_address; + + dwarf_expr_eval (ctx, data, size); + if (ctx->num_pieces > 0) + { + /* what should we do here? */ + sz = 0; + } + else if (ctx->in_reg) + sz = 0; + else + sz = TYPE_LENGTH (SYMBOL_TYPE (var)); + + free_dwarf_expr_context (ctx); + + return sz; +} +// end ARC /* Helper functions and baton for dwarf2_loc_desc_needs_frame. */ @@ -434,6 +515,30 @@ locexpr_read_variable (struct symbol *symbol, struct frame_info *frame) return val; } +// begin ARC +/* Return the address of SYMBOL in FRAME using the DWARF-2 expression + evaluator to calculate the location. */ +static CORE_ADDR +locexpr_get_variable_address (struct symbol *symbol, struct frame_info *frame) +{ + struct dwarf2_locexpr_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol); + + return dwarf2_find_address (symbol, frame, dlbaton->data, dlbaton->size, + dlbaton->objfile); +} + +/* Return the size of SYMBOL in FRAME using the DWARF-2 expression + evaluator to calculate the location. */ +static unsigned int +locexpr_get_variable_size(struct symbol *symbol, struct frame_info *frame) +{ + struct dwarf2_locexpr_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol); + + return dwarf2_find_size (symbol, frame, dlbaton->data, dlbaton->size, + dlbaton->objfile); +} +// end ARC + /* Return non-zero iff we need a frame to evaluate SYMBOL. */ static int locexpr_read_needs_frame (struct symbol *symbol) @@ -516,6 +621,10 @@ locexpr_tracepoint_var_ref (struct symbol * symbol, struct agent_expr * ax, evaluator. */ const struct symbol_ops dwarf2_locexpr_funcs = { locexpr_read_variable, +// begin ARC + locexpr_get_variable_address, + locexpr_get_variable_size, +// end ARC locexpr_read_needs_frame, locexpr_describe_location, locexpr_tracepoint_var_ref @@ -551,6 +660,46 @@ loclist_read_variable (struct symbol *symbol, struct frame_info *frame) return val; } +// begin ARC +/* Return the address of SYMBOL in FRAME using the DWARF-2 expression + evaluator to calculate the location. */ +static CORE_ADDR +loclist_get_variable_address (struct symbol *symbol, struct frame_info *frame) +{ + struct dwarf2_loclist_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol); + struct value *val; + gdb_byte *data; + size_t size; + + data = find_location_expression (dlbaton, &size, + frame ? get_frame_address_in_block (frame) + : 0); + if (data == NULL) + return 0; + + return dwarf2_find_address(symbol, frame, data, size, dlbaton->objfile); +} + +/* Return the size of SYMBOL in FRAME using the DWARF-2 expression + evaluator to calculate the location. */ +static unsigned int +loclist_get_variable_size(struct symbol *symbol, struct frame_info *frame) +{ + struct dwarf2_loclist_baton *dlbaton = SYMBOL_LOCATION_BATON (symbol); + struct value *val; + gdb_byte *data; + size_t size; + + data = find_location_expression (dlbaton, &size, + frame ? get_frame_address_in_block (frame) + : 0); + if (data == NULL) + return 0; + + return dwarf2_find_size(symbol, frame, data, size, dlbaton->objfile); +} +// end ARC + /* Return non-zero iff we need a frame to evaluate SYMBOL. */ static int loclist_read_needs_frame (struct symbol *symbol) @@ -594,6 +743,10 @@ loclist_tracepoint_var_ref (struct symbol * symbol, struct agent_expr * ax, evaluator and location lists. */ const struct symbol_ops dwarf2_loclist_funcs = { loclist_read_variable, +// begin ARC + loclist_get_variable_address, + loclist_get_variable_size, +// end ARC loclist_read_needs_frame, loclist_describe_location, loclist_tracepoint_var_ref |