gas/
* dwarf2dbg.c (out_sleb128): Delete. (size_fixed_inc_line_addr, emit_fixed_inc_line_addr): New. (out_fixed_inc_line_addr): Delete. (relax_inc_line_addr, dwarf2dbg_estimate_size_before_relax): Call new size_fixed_inc_line_addr if DWARF2_USE_FIXED_ADVANCE_PC is set. (dwarf2dbg_convert_frag): Likewise for emit_fixed_inc_line_addr. (process_entries): Remove calls to out_fixed_inc_line_addr. When DWARF2_USE_FIXED_ADVANCE_PC is set, call relax_inc_line_addr. * read.h (emit_expr_fix): New prototype. * read.c (emit_expr): Move code to emit_expr_fix and use it here. (emit_expr_fix): New. testsuite/ * gas/lns/lns.exp: Run new lns-big-delta test for targets that set DWARF2_USE_FIXED_ADVANCE_PC. * gas/lns/lns-big-delta.s: New. * gas/lns/lns-big-delta.d: New.
This commit is contained in:
Bob Wilson
parent
39d5313e31
commit
7ddd14deff
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@ -1,3 +1,17 @@
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2008-01-09 Bob Wilson <bob.wilson@acm.org>
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* dwarf2dbg.c (out_sleb128): Delete.
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(size_fixed_inc_line_addr, emit_fixed_inc_line_addr): New.
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(out_fixed_inc_line_addr): Delete.
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(relax_inc_line_addr, dwarf2dbg_estimate_size_before_relax): Call new
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size_fixed_inc_line_addr if DWARF2_USE_FIXED_ADVANCE_PC is set.
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(dwarf2dbg_convert_frag): Likewise for emit_fixed_inc_line_addr.
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(process_entries): Remove calls to out_fixed_inc_line_addr. When
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DWARF2_USE_FIXED_ADVANCE_PC is set, call relax_inc_line_addr.
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* read.h (emit_expr_fix): New prototype.
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* read.c (emit_expr): Move code to emit_expr_fix and use it here.
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(emit_expr_fix): New.
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2008-01-09 H.J. Lu <hongjiu.lu@intel.com>
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* config/tc-i386.c (match_template): Check register size
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159
gas/dwarf2dbg.c
159
gas/dwarf2dbg.c
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@ -1,5 +1,5 @@
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/* dwarf2dbg.c - DWARF2 debug support
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Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
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Copyright 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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Free Software Foundation, Inc.
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Contributed by David Mosberger-Tang <davidm@hpl.hp.com>
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@ -198,13 +198,13 @@ static void out_two (int);
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static void out_four (int);
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static void out_abbrev (int, int);
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static void out_uleb128 (addressT);
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static void out_sleb128 (addressT);
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static offsetT get_frag_fix (fragS *, segT);
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static void out_set_addr (symbolS *);
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static int size_inc_line_addr (int, addressT);
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static void emit_inc_line_addr (int, addressT, char *, int);
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static int size_fixed_inc_line_addr (int, addressT);
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static void emit_fixed_inc_line_addr (int, addressT, fragS *, char *, int);
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static void out_inc_line_addr (int, addressT);
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static void out_fixed_inc_line_addr (int, symbolS *, symbolS *);
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static void relax_inc_line_addr (int, symbolS *, symbolS *);
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static void process_entries (segT, struct line_entry *);
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static void out_file_list (void);
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@ -762,14 +762,6 @@ out_uleb128 (addressT value)
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output_leb128 (frag_more (sizeof_leb128 (value, 0)), value, 0);
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}
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/* Emit a signed "little-endian base 128" number. */
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static void
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out_sleb128 (addressT value)
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{
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output_leb128 (frag_more (sizeof_leb128 (value, 1)), value, 1);
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}
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/* Emit a tuple for .debug_abbrev. */
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static inline void
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@ -1005,41 +997,103 @@ out_inc_line_addr (int line_delta, addressT addr_delta)
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/* Write out an alternative form of line and address skips using
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DW_LNS_fixed_advance_pc opcodes. This uses more space than the default
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line and address information, but it helps support linker relaxation that
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changes the code offsets. */
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line and address information, but it is required if linker relaxation
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could change the code offsets. The following two routines *must* be
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kept in sync. */
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static void
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out_fixed_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym)
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static int
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size_fixed_inc_line_addr (int line_delta, addressT addr_delta)
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{
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expressionS expr;
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int len = 0;
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/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */
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if (line_delta == INT_MAX)
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{
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out_opcode (DW_LNS_fixed_advance_pc);
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expr.X_op = O_subtract;
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expr.X_add_symbol = to_sym;
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expr.X_op_symbol = from_sym;
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expr.X_add_number = 0;
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emit_expr (&expr, 2);
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if (line_delta != INT_MAX)
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len = 1 + sizeof_leb128 (line_delta, 1);
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out_opcode (DW_LNS_extended_op);
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out_byte (1);
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out_opcode (DW_LNE_end_sequence);
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return;
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if (addr_delta > 50000)
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{
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/* DW_LNS_extended_op */
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len += 1 + sizeof_leb128 (sizeof_address + 1, 0);
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/* DW_LNE_set_address */
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len += 1 + sizeof_address;
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}
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else
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/* DW_LNS_fixed_advance_pc */
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len += 3;
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if (line_delta == INT_MAX)
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/* DW_LNS_extended_op + DW_LNE_end_sequence */
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len += 3;
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else
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/* DW_LNS_copy */
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len += 1;
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return len;
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}
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static void
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emit_fixed_inc_line_addr (int line_delta, addressT addr_delta, fragS *frag,
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char *p, int len)
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{
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expressionS *exp;
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segT line_seg;
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char *end = p + len;
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/* Line number sequences cannot go backward in addresses. This means
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we've incorrectly ordered the statements in the sequence. */
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assert ((offsetT) addr_delta >= 0);
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/* INT_MAX is a signal that this is actually a DW_LNE_end_sequence. */
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if (line_delta != INT_MAX)
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{
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*p++ = DW_LNS_advance_line;
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p += output_leb128 (p, line_delta, 1);
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}
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out_opcode (DW_LNS_advance_line);
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out_sleb128 (line_delta);
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exp = symbol_get_value_expression (frag->fr_symbol);
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line_seg = subseg_get (".debug_line", 0);
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out_opcode (DW_LNS_fixed_advance_pc);
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expr.X_op = O_subtract;
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expr.X_add_symbol = to_sym;
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expr.X_op_symbol = from_sym;
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expr.X_add_number = 0;
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emit_expr (&expr, 2);
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/* The DW_LNS_fixed_advance_pc opcode has a 2-byte operand so it can
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advance the address by at most 64K. Linker relaxation (without
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which this function would not be used) could change the operand by
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an unknown amount. If the address increment is getting close to
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the limit, just reset the address. */
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if (addr_delta > 50000)
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{
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symbolS *to_sym;
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expressionS expr;
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out_opcode (DW_LNS_copy);
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assert (exp->X_op = O_subtract);
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to_sym = exp->X_add_symbol;
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*p++ = DW_LNS_extended_op;
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p += output_leb128 (p, sizeof_address + 1, 0);
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*p++ = DW_LNE_set_address;
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expr.X_op = O_symbol;
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expr.X_add_symbol = to_sym;
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expr.X_add_number = 0;
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subseg_change (line_seg, 0);
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emit_expr_fix (&expr, sizeof_address, frag, p);
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p += sizeof_address;
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}
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else
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{
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*p++ = DW_LNS_fixed_advance_pc;
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subseg_change (line_seg, 0);
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emit_expr_fix (exp, 2, frag, p);
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p += 2;
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}
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if (line_delta == INT_MAX)
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{
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*p++ = DW_LNS_extended_op;
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*p++ = 1;
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*p++ = DW_LNE_end_sequence;
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}
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else
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*p++ = DW_LNS_copy;
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assert (p == end);
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}
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/* Generate a variant frag that we can use to relax address/line
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@ -1058,7 +1112,11 @@ relax_inc_line_addr (int line_delta, symbolS *to_sym, symbolS *from_sym)
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/* The maximum size of the frag is the line delta with a maximum
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sized address delta. */
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max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH);
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if (DWARF2_USE_FIXED_ADVANCE_PC)
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max_chars = size_fixed_inc_line_addr (line_delta,
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-DWARF2_LINE_MIN_INSN_LENGTH);
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else
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max_chars = size_inc_line_addr (line_delta, -DWARF2_LINE_MIN_INSN_LENGTH);
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frag_var (rs_dwarf2dbg, max_chars, max_chars, 1,
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make_expr_symbol (&expr), line_delta, NULL);
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@ -1075,7 +1133,10 @@ dwarf2dbg_estimate_size_before_relax (fragS *frag)
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int size;
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addr_delta = resolve_symbol_value (frag->fr_symbol);
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size = size_inc_line_addr (frag->fr_offset, addr_delta);
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if (DWARF2_USE_FIXED_ADVANCE_PC)
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size = size_fixed_inc_line_addr (frag->fr_offset, addr_delta);
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else
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size = size_inc_line_addr (frag->fr_offset, addr_delta);
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frag->fr_subtype = size;
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@ -1113,8 +1174,13 @@ dwarf2dbg_convert_frag (fragS *frag)
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course, have allocated enough memory earlier. */
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assert (frag->fr_var >= (int) frag->fr_subtype);
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emit_inc_line_addr (frag->fr_offset, addr_diff,
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frag->fr_literal + frag->fr_fix, frag->fr_subtype);
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if (DWARF2_USE_FIXED_ADVANCE_PC)
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emit_fixed_inc_line_addr (frag->fr_offset, addr_diff, frag,
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frag->fr_literal + frag->fr_fix,
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frag->fr_subtype);
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else
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emit_inc_line_addr (frag->fr_offset, addr_diff,
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frag->fr_literal + frag->fr_fix, frag->fr_subtype);
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frag->fr_fix += frag->fr_subtype;
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frag->fr_type = rs_fill;
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@ -1192,9 +1258,7 @@ process_entries (segT seg, struct line_entry *e)
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out_set_addr (lab);
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out_inc_line_addr (line_delta, 0);
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}
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else if (DWARF2_USE_FIXED_ADVANCE_PC)
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out_fixed_inc_line_addr (line_delta, lab, last_lab);
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else if (frag == last_frag)
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else if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC)
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out_inc_line_addr (line_delta, frag_ofs - last_frag_ofs);
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else
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relax_inc_line_addr (line_delta, lab, last_lab);
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@ -1213,12 +1277,7 @@ process_entries (segT seg, struct line_entry *e)
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/* Emit a DW_LNE_end_sequence for the end of the section. */
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frag = last_frag_for_seg (seg);
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frag_ofs = get_frag_fix (frag, seg);
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if (DWARF2_USE_FIXED_ADVANCE_PC)
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{
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lab = symbol_temp_new (seg, frag_ofs, frag);
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out_fixed_inc_line_addr (INT_MAX, lab, last_lab);
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}
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else if (frag == last_frag)
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if (frag == last_frag && ! DWARF2_USE_FIXED_ADVANCE_PC)
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out_inc_line_addr (INT_MAX, frag_ofs - last_frag_ofs);
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else
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{
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62
gas/read.c
62
gas/read.c
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@ -1,6 +1,6 @@
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/* read.c - read a source file -
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Copyright 1986, 1987, 1990, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
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1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007
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1998, 1999, 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008
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Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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@ -4175,41 +4175,45 @@ emit_expr (expressionS *exp, unsigned int nbytes)
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}
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}
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else
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{
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memset (p, 0, nbytes);
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emit_expr_fix (exp, nbytes, frag_now, p);
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}
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/* Now we need to generate a fixS to record the symbol value. */
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void
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emit_expr_fix (expressionS *exp, unsigned int nbytes, fragS *frag, char *p)
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{
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memset (p, 0, nbytes);
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/* Generate a fixS to record the symbol value. */
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#ifdef TC_CONS_FIX_NEW
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TC_CONS_FIX_NEW (frag_now, p - frag_now->fr_literal, nbytes, exp);
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TC_CONS_FIX_NEW (frag, p - frag->fr_literal, nbytes, exp);
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#else
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{
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bfd_reloc_code_real_type r;
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{
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bfd_reloc_code_real_type r;
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switch (nbytes)
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{
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case 1:
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r = BFD_RELOC_8;
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break;
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case 2:
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r = BFD_RELOC_16;
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break;
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case 4:
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r = BFD_RELOC_32;
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break;
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case 8:
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r = BFD_RELOC_64;
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break;
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default:
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as_bad (_("unsupported BFD relocation size %u"), nbytes);
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r = BFD_RELOC_32;
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break;
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}
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fix_new_exp (frag_now, p - frag_now->fr_literal, (int) nbytes, exp,
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0, r);
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switch (nbytes)
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{
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case 1:
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r = BFD_RELOC_8;
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break;
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case 2:
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r = BFD_RELOC_16;
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break;
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case 4:
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r = BFD_RELOC_32;
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break;
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case 8:
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r = BFD_RELOC_64;
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break;
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default:
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as_bad (_("unsupported BFD relocation size %u"), nbytes);
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r = BFD_RELOC_32;
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break;
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}
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fix_new_exp (frag, p - frag->fr_literal, (int) nbytes, exp,
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0, r);
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}
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#endif
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}
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}
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#ifdef BITFIELD_CONS_EXPRESSIONS
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@ -1,6 +1,6 @@
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/* read.h - of read.c
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Copyright 1986, 1990, 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999,
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2000, 2001, 2002, 2003, 2004, 2005, 2007
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2000, 2001, 2002, 2003, 2004, 2005, 2007, 2008
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Free Software Foundation, Inc.
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This file is part of GAS, the GNU Assembler.
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@ -111,6 +111,7 @@ extern void add_include_dir (char *path);
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extern void cons (int nbytes);
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extern void demand_empty_rest_of_line (void);
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extern void emit_expr (expressionS *exp, unsigned int nbytes);
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extern void emit_expr_fix (expressionS *, unsigned int, fragS *, char *);
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extern void equals (char *sym_name, int reassign);
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extern void float_cons (int float_type);
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extern void ignore_rest_of_line (void);
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|
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@ -1,3 +1,10 @@
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2008-01-09 Bob Wilson <bob.wilson@acm.org>
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* gas/lns/lns.exp: Run new lns-big-delta test for targets that set
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DWARF2_USE_FIXED_ADVANCE_PC.
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* gas/lns/lns-big-delta.s: New.
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* gas/lns/lns-big-delta.d: New.
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2008-01-08 John David Anglin <dave.anglin@nrc-cnrc.gc.ca>
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PR gas/5322
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@ -0,0 +1,14 @@
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#source: lns-big-delta.s
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#readelf: -wl
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#name: lns-big-delta
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Dump of debug contents of section \.debug_line:
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#...
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Line Number Statements:
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Extended opcode 2: set Address to .*
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Copy
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Advance Line by 1 to 2
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Extended opcode 2: set Address to .*
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Copy
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Advance PC by fixed size amount 0 to .*
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Extended opcode 1: End of Sequence
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#pass
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@ -0,0 +1,5 @@
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.file 1 "foo.c"
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.loc 1 1 0
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.loc 1 2 0
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.space 75000
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.loc 1 3 0
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@ -22,6 +22,7 @@ if {
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# Use alternate file for targets using DW_LNS_fixed_advance_pc opcodes.
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if { [istarget xtensa-*-*] } {
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run_dump_test "lns-common-1-alt"
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run_dump_test "lns-big-delta"
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} elseif { [istarget ia64*-*-*] } {
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run_dump_test "lns-common-1" { { source "lns-common-1-ia64.s" } }
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} else {
|
||||
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|
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Reference in New Issue