X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fdwarf2loc.h;h=786e77cc5b8a29402ceb00876d66143e0e961ac5;hb=583f9a86a41ec94276dd56da8844a40add57f734;hp=d246e7c30e6a7b346f17af0acfc5a539fb1f2185;hpb=947bb88ff5da0770e9d6a238b54b7053ba8bd6fb;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/dwarf2loc.h b/gdb/dwarf2loc.h index d246e7c30e..786e77cc5b 100644 --- a/gdb/dwarf2loc.h +++ b/gdb/dwarf2loc.h @@ -1,7 +1,6 @@ /* DWARF 2 location expression support for GDB. - Copyright (C) 2003, 2005, 2007, 2008, 2009, 2010 - Free Software Foundation, Inc. + Copyright (C) 2003-2014 Free Software Foundation, Inc. This file is part of GDB. @@ -21,18 +20,78 @@ #if !defined (DWARF2LOC_H) #define DWARF2LOC_H +#include "dwarf2expr.h" + struct symbol_computed_ops; struct objfile; struct dwarf2_per_cu_data; +struct dwarf2_loclist_baton; +struct agent_expr; +struct axs_value; /* This header is private to the DWARF-2 reader. It is shared between dwarf2read.c and dwarf2loc.c. */ -/* Return the OBJFILE associated with the compilation unit CU. */ +/* `set debug entry-values' setting. */ +extern unsigned int entry_values_debug; + +/* Return the OBJFILE associated with the compilation unit CU. If CU + came from a separate debuginfo file, then the master objfile is + returned. */ struct objfile *dwarf2_per_cu_objfile (struct dwarf2_per_cu_data *cu); /* Return the address size given in the compilation unit header for CU. */ -CORE_ADDR dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *cu); +int dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *cu); + +/* Return the DW_FORM_ref_addr size given in the compilation unit header for + CU. */ +int dwarf2_per_cu_ref_addr_size (struct dwarf2_per_cu_data *cu); + +/* Return the offset size given in the compilation unit header for CU. */ +int dwarf2_per_cu_offset_size (struct dwarf2_per_cu_data *cu); + +/* Return the text offset of the CU. The returned offset comes from + this CU's objfile. If this objfile came from a separate debuginfo + file, then the offset may be different from the corresponding + offset in the parent objfile. */ +CORE_ADDR dwarf2_per_cu_text_offset (struct dwarf2_per_cu_data *cu); + +/* Find a particular location expression from a location list. */ +const gdb_byte *dwarf2_find_location_expression + (struct dwarf2_loclist_baton *baton, + size_t *locexpr_length, + CORE_ADDR pc); + +struct dwarf2_locexpr_baton dwarf2_fetch_die_loc_sect_off + (sect_offset offset_in_cu, struct dwarf2_per_cu_data *per_cu, + CORE_ADDR (*get_frame_pc) (void *baton), + void *baton); + +struct dwarf2_locexpr_baton dwarf2_fetch_die_loc_cu_off + (cu_offset offset_in_cu, struct dwarf2_per_cu_data *per_cu, + CORE_ADDR (*get_frame_pc) (void *baton), + void *baton); + +extern const gdb_byte *dwarf2_fetch_constant_bytes (sect_offset, + struct dwarf2_per_cu_data *, + struct obstack *, + LONGEST *); + +struct type *dwarf2_get_die_type (cu_offset die_offset, + struct dwarf2_per_cu_data *per_cu); + +/* Evaluate a location description, starting at DATA and with length + SIZE, to find the current location of variable of TYPE in the context + of FRAME. */ + +struct value *dwarf2_evaluate_loc_desc (struct type *type, + struct frame_info *frame, + const gdb_byte *data, + size_t size, + struct dwarf2_per_cu_data *per_cu); + +CORE_ADDR dwarf2_read_addr_index (struct dwarf2_per_cu_data *per_cu, + unsigned int addr_index); /* The symbol location baton types used by the DWARF-2 reader (i.e. SYMBOL_LOCATION_BATON for a LOC_COMPUTED symbol). "struct @@ -42,11 +101,13 @@ CORE_ADDR dwarf2_per_cu_addr_size (struct dwarf2_per_cu_data *cu); struct dwarf2_locexpr_baton { - /* Pointer to the start of the location expression. */ + /* Pointer to the start of the location expression. Valid only if SIZE is + not zero. */ const gdb_byte *data; - /* Length of the location expression. */ - unsigned long size; + /* Length of the location expression. For optimized out expressions it is + zero. */ + size_t size; /* The compilation unit containing the symbol whose location we're computing. */ @@ -63,14 +124,61 @@ struct dwarf2_loclist_baton const gdb_byte *data; /* Length of the location list. */ - unsigned long size; + size_t size; /* The compilation unit containing the symbol whose location we're computing. */ struct dwarf2_per_cu_data *per_cu; + + /* Non-zero if the location list lives in .debug_loc.dwo. + The format of entries in this section are different. */ + unsigned char from_dwo; }; extern const struct symbol_computed_ops dwarf2_locexpr_funcs; extern const struct symbol_computed_ops dwarf2_loclist_funcs; +extern const struct symbol_block_ops dwarf2_block_frame_base_locexpr_funcs; +extern const struct symbol_block_ops dwarf2_block_frame_base_loclist_funcs; + +/* Compile a DWARF location expression to an agent expression. + + EXPR is the agent expression we are building. + LOC is the agent value we modify. + ARCH is the architecture. + ADDR_SIZE is the size of addresses, in bytes. + OP_PTR is the start of the location expression. + OP_END is one past the last byte of the location expression. + + This will throw an exception for various kinds of errors -- for + example, if the expression cannot be compiled, or if the expression + is invalid. */ + +extern void dwarf2_compile_expr_to_ax (struct agent_expr *expr, + struct axs_value *loc, + struct gdbarch *arch, + unsigned int addr_size, + const gdb_byte *op_ptr, + const gdb_byte *op_end, + struct dwarf2_per_cu_data *per_cu); + +/* Determined tail calls for constructing virtual tail call frames. */ + +struct call_site_chain + { + /* Initially CALLERS == CALLEES == LENGTH. For partially ambiguous result + CALLERS + CALLEES < LENGTH. */ + int callers, callees, length; + + /* Variably sized array with LENGTH elements. Later [0..CALLERS-1] contain + top (GDB "prev") sites and [LENGTH-CALLEES..LENGTH-1] contain bottom + (GDB "next") sites. One is interested primarily in the PC field. */ + struct call_site *call_site[1]; + }; + +struct call_site_stuff; +extern struct call_site_chain *call_site_find_chain (struct gdbarch *gdbarch, + CORE_ADDR caller_pc, + CORE_ADDR callee_pc); + #endif /* dwarf2loc.h */