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Diffstat (limited to 'gdb/dwarf2expr.h')
| -rw-r--r-- | gdb/dwarf2expr.h | 138 |
1 files changed, 0 insertions, 138 deletions
diff --git a/gdb/dwarf2expr.h b/gdb/dwarf2expr.h deleted file mode 100644 index cc5c4f3..0000000 --- a/gdb/dwarf2expr.h +++ /dev/null @@ -1,138 +0,0 @@ -/* DWARF 2 Expression Evaluator. - - Copyright (C) 2001, 2002, 2003, 2005 Free Software Foundation, Inc. - - Contributed by Daniel Berlin <dan@dberlin.org>. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 2 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program; if not, write to the Free Software - Foundation, Inc., 51 Franklin Street, Fifth Floor, - Boston, MA 02110-1301, USA. */ - -#if !defined (DWARF2EXPR_H) -#define DWARF2EXPR_H - -/* The expression evaluator works with a dwarf_expr_context, describing - its current state and its callbacks. */ -struct dwarf_expr_context -{ - /* The stack of values, allocated with xmalloc. */ - CORE_ADDR *stack; - - /* The number of values currently pushed on the stack, and the - number of elements allocated to the stack. */ - int stack_len, stack_allocated; - - /* An opaque argument provided by the caller, which will be passed - to all of the callback functions. */ - void *baton; - - /* 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, gdb_byte **start, size_t *length); - - /* Return the thread-local storage address for - DW_OP_GNU_push_tls_address. */ - CORE_ADDR (*get_tls_address) (void *baton, CORE_ADDR offset); - -#if 0 - /* Not yet implemented. */ - - /* Return the location expression for the dwarf expression - subroutine in the die at OFFSET in the current compilation unit. - The result must be live until the current expression evaluation - is complete. */ - unsigned char *(*get_subr) (void *baton, off_t offset, size_t *length); - - /* Return the `object address' for DW_OP_push_object_address. */ - CORE_ADDR (*get_object_address) (void *baton); -#endif - - /* 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. */ - int recursion_depth, max_recursion_depth; - - /* Non-zero if the result is in a register. The register number - will be on the expression stack. */ - int in_reg; - - /* An array of pieces. PIECES points to its first element; - NUM_PIECES is its length. - - Each time DW_OP_piece is executed, we add a new element to the - end of this array, recording the current top of the stack, the - current in_reg flag, and the size given as the operand to - DW_OP_piece. We then pop the top value from the stack, clear the - in_reg flag, and resume evaluation. - - The Dwarf spec doesn't say whether DW_OP_piece pops the top value - from the stack. We do, ensuring that clients of this interface - expecting to see a value left on the top of the stack (say, code - evaluating frame base expressions or CFA's specified with - DW_CFA_def_cfa_expression) will get an error if the expression - actually marks all the values it computes as pieces. - - If an expression never uses DW_OP_piece, num_pieces will be zero. - (It would be nice to present these cases as expressions yielding - a single piece, with in_reg clear, so that callers need not - distinguish between the no-DW_OP_piece and one-DW_OP_piece cases. - But expressions with no DW_OP_piece operations have no value to - place in a piece's 'size' field; the size comes from the - surrounding data. So the two cases need to be handled - separately.) */ - int num_pieces; - struct dwarf_expr_piece *pieces; -}; - - -/* A piece of an object, as recorded by DW_OP_piece. */ -struct dwarf_expr_piece -{ - /* If IN_REG is zero, then the piece is in memory, and VALUE is its address. - If IN_REG is non-zero, then the piece is in a register, and VALUE - is the register number. */ - int in_reg; - - /* This piece's address or register number. */ - CORE_ADDR value; - - /* The length of the piece, in bytes. */ - ULONGEST size; -}; - -struct dwarf_expr_context *new_dwarf_expr_context (void); -void free_dwarf_expr_context (struct dwarf_expr_context *ctx); - -void dwarf_expr_push (struct dwarf_expr_context *ctx, CORE_ADDR value); -void dwarf_expr_pop (struct dwarf_expr_context *ctx); -void dwarf_expr_eval (struct dwarf_expr_context *ctx, unsigned char *addr, - size_t len); -CORE_ADDR dwarf_expr_fetch (struct dwarf_expr_context *ctx, int n); - - -gdb_byte *read_uleb128 (gdb_byte *buf, gdb_byte *buf_end, ULONGEST * r); -gdb_byte *read_sleb128 (gdb_byte *buf, gdb_byte *buf_end, LONGEST * r); -CORE_ADDR dwarf2_read_address (gdb_byte *buf, gdb_byte *buf_end, - int *bytes_read); - -#endif /* dwarf2expr.h */ |