X-Git-Url: http://git.efficios.com/?a=blobdiff_plain;f=gdb%2Fdwarf2expr.h;h=7df697d8567a40da52a5fece61fa8865e68acbb0;hb=7ef3addbe195b6283d0baf59e081146dfb211c97;hp=82a5a93e1050eac46da3c9348a2a85a7b94373ff;hpb=f664829eae5325405ce4e7f064c7be02352ce1f6;p=deliverable%2Fbinutils-gdb.git diff --git a/gdb/dwarf2expr.h b/gdb/dwarf2expr.h index 82a5a93e10..7df697d856 100644 --- a/gdb/dwarf2expr.h +++ b/gdb/dwarf2expr.h @@ -1,7 +1,6 @@ /* DWARF 2 Expression Evaluator. - Copyright (C) 2001-2003, 2005, 2007-2012 Free Software Foundation, - Inc. + Copyright (C) 2001-2017 Free Software Foundation, Inc. Contributed by Daniel Berlin . @@ -24,80 +23,7 @@ #define DWARF2EXPR_H #include "leb128.h" - -struct dwarf_expr_context; - -/* Offset relative to the start of its containing CU (compilation unit). */ -typedef struct -{ - unsigned int cu_off; -} cu_offset; - -/* Offset relative to the start of its .debug_info or .debug_types section. */ -typedef struct -{ - unsigned int sect_off; -} sect_offset; - -/* Virtual method table for struct dwarf_expr_context below. */ - -struct dwarf_expr_context_funcs -{ - /* Return the value of register number REGNUM. */ - CORE_ADDR (*read_reg) (void *baton, 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. */ - 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 - DWARF_REG/FB_OFFSET at the caller of specified BATON. If DWARF register - number DWARF_REG specifying the push_dwarf_reg_entry_value parameter is - not -1 FB_OFFSET is ignored. Otherwise FB_OFFSET specifies stack - parameter offset against caller's stack pointer (which equals the callee's - frame base). 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, - int dwarf_reg, CORE_ADDR fb_offset, - 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); - -#if 0 - /* Not yet implemented. */ - - /* Return the `object address' for DW_OP_push_object_address. */ - CORE_ADDR (*get_object_address) (void *baton); -#endif -}; +#include "gdbtypes.h" /* The location of a value. */ enum dwarf_value_location @@ -141,6 +67,15 @@ struct dwarf_stack_value its current state and its callbacks. */ struct dwarf_expr_context { + dwarf_expr_context (); + virtual ~dwarf_expr_context (); + + void push_address (CORE_ADDR value, int in_stack_memory); + void eval (const gdb_byte *addr, size_t len); + struct value *fetch (int n); + CORE_ADDR fetch_address (int n); + int fetch_in_stack_memory (int n); + /* The stack of values, allocated with xmalloc. */ struct dwarf_stack_value *stack; @@ -158,16 +93,9 @@ struct dwarf_expr_context context and operations depending on DW_FORM_ref_addr are not allowed. */ int ref_addr_size; - /* Offset used to relocate DW_OP_addr argument. */ + /* 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. */ @@ -178,7 +106,7 @@ struct dwarf_expr_context /* For DWARF_VALUE_LITERAL, the current literal value's length and data. For DWARF_VALUE_IMPLICIT_POINTER, LEN is the offset of the - target DIE of cu_offset kind. */ + target DIE of sect_offset kind. */ ULONGEST len; const gdb_byte *data; @@ -211,6 +139,78 @@ struct dwarf_expr_context two cases need to be handled separately.) */ 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) = 0; + + /* Return the CFA for the frame. */ + virtual CORE_ADDR get_frame_cfa () = 0; + + /* Return the PC for the frame. */ + virtual CORE_ADDR get_frame_pc () + { + error (_("%s is invalid in this context"), "DW_OP_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) = 0; + + /* Execute DW_AT_location expression for the DWARF expression + subroutine in the DIE at DIE_CU_OFF 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_cu_off) = 0; + + /* Return the base type given by the indicated DIE at DIE_CU_OFF. + This can throw an exception if the DIE is invalid or does not + represent a base type. SIZE is non-zero if this function should + verify that the resulting type has the correct size. */ + virtual struct type *get_base_type (cu_offset die_cu_off, int size) + { + /* Anything will do. */ + return builtin_type (this->gdbarch)->builtin_int; + } + + /* Push on DWARF stack an entry evaluated for DW_TAG_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_call_data_value instead of + DW_AT_call_value. */ + virtual void push_dwarf_reg_entry_value (enum call_site_parameter_kind kind, + union call_site_parameter_u kind_u, + int deref_size) = 0; + + /* 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) = 0; + + /* Return the `object address' for DW_OP_push_object_address. */ + virtual CORE_ADDR get_object_address () = 0; + +private: + + struct type *address_type () const; + void grow_stack (size_t need); + void push (struct value *value, int in_stack_memory); + int stack_empty_p () const; + void add_piece (ULONGEST size, ULONGEST offset); + void execute_stack_op (const gdb_byte *op_ptr, const gdb_byte *op_end); + void pop (); }; @@ -248,8 +248,8 @@ struct dwarf_expr_piece /* Used for DWARF_VALUE_IMPLICIT_POINTER. */ struct { - /* The referent DIE from DW_OP_GNU_implicit_pointer. */ - cu_offset die; + /* The referent DIE from DW_OP_implicit_pointer. */ + sect_offset die_sect_off; /* The byte offset into the resulting data. */ LONGEST offset; } ptr; @@ -261,38 +261,9 @@ struct dwarf_expr_piece ULONGEST offset; }; -struct dwarf_expr_context *new_dwarf_expr_context (void); -void free_dwarf_expr_context (struct dwarf_expr_context *ctx); -struct cleanup * - make_cleanup_free_dwarf_expr_context (struct dwarf_expr_context *ctx); - -void dwarf_expr_push_address (struct dwarf_expr_context *ctx, - CORE_ADDR value, - int in_stack_memory); -void dwarf_expr_eval (struct dwarf_expr_context *ctx, const gdb_byte *addr, - size_t len); -struct value *dwarf_expr_fetch (struct dwarf_expr_context *ctx, int n); -CORE_ADDR dwarf_expr_fetch_address (struct dwarf_expr_context *ctx, int n); -int dwarf_expr_fetch_in_stack_memory (struct dwarf_expr_context *ctx, int n); - 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, - int dwarf_reg, CORE_ADDR fb_offset, - 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, @@ -311,9 +282,9 @@ int dwarf_block_to_sp_offset (struct gdbarch *gdbarch, const gdb_byte *buf, static inline const gdb_byte * gdb_read_uleb128 (const gdb_byte *buf, const gdb_byte *buf_end, - unsigned long long *r) + uint64_t *r) { - size_t bytes_read = read_uleb128_to_ull (buf, buf_end, r); + size_t bytes_read = read_uleb128_to_uint64 (buf, buf_end, r); if (bytes_read == 0) return NULL; @@ -322,9 +293,9 @@ gdb_read_uleb128 (const gdb_byte *buf, const gdb_byte *buf_end, static inline const gdb_byte * gdb_read_sleb128 (const gdb_byte *buf, const gdb_byte *buf_end, - long long *r) + int64_t *r) { - size_t bytes_read = read_sleb128_to_ll (buf, buf_end, r); + size_t bytes_read = read_sleb128_to_int64 (buf, buf_end, r); if (bytes_read == 0) return NULL; @@ -343,11 +314,11 @@ gdb_skip_leb128 (const gdb_byte *buf, const gdb_byte *buf_end) extern const gdb_byte *safe_read_uleb128 (const gdb_byte *buf, const gdb_byte *buf_end, - unsigned long long *r); + uint64_t *r); extern const gdb_byte *safe_read_sleb128 (const gdb_byte *buf, const gdb_byte *buf_end, - long long *r); + int64_t *r); extern const gdb_byte *safe_skip_leb128 (const gdb_byte *buf, const gdb_byte *buf_end);