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Fix .debug_line prologue header length calculation for 64-bit DWARF

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The header_length field is the number of bytes following the field to
the first byte of the line number program.  The hard-coded constants
previously here (4 + 2 + 4) were correct only for 32-bit DWARF.

Sponsored by:	DARPA, AFRL
This commit is contained in:
Ed Maste 2013-10-17 17:25:00 +00:00
parent e49341e87c
commit 1b182736a6
1 changed files with 8 additions and 10 deletions
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18
contrib/binutils/gas/dwarf2dbg.c
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@ -1271,6 +1271,7 @@ out_debug_line (segT line_seg)
symbolS *line_end;
struct line_seg *s;
enum dwarf2_format d2f;
int sizeof_initial_length;
int sizeof_offset;
subseg_set (line_seg, 0);
@ -1287,27 +1288,24 @@ out_debug_line (segT line_seg)
d2f = DWARF2_FORMAT ();
if (d2f == dwarf2_format_32bit)
{
expr.X_add_number = -4;
emit_expr (&expr, 4);
sizeof_offset = 4;
sizeof_initial_length = sizeof_offset = 4;
}
else if (d2f == dwarf2_format_64bit)
{
expr.X_add_number = -12;
out_four (-1);
emit_expr (&expr, 8);
sizeof_initial_length = 12;
sizeof_offset = 8;
out_four (-1);
}
else if (d2f == dwarf2_format_64bit_irix)
{
expr.X_add_number = -8;
emit_expr (&expr, 8);
sizeof_offset = 8;
sizeof_initial_length = sizeof_offset = 8;
}
else
{
as_fatal (_("internal error: unknown dwarf2 format"));
}
expr.X_add_number = -sizeof_initial_length;
emit_expr (&expr, sizeof_offset);
/* Version. */
out_two (2);
@ -1316,7 +1314,7 @@ out_debug_line (segT line_seg)
expr.X_op = O_subtract;
expr.X_add_symbol = prologue_end;
expr.X_op_symbol = line_start;
expr.X_add_number = - (4 + 2 + 4);
expr.X_add_number = - (sizeof_initial_length + 2 + sizeof_offset);
emit_expr (&expr, sizeof_offset);
/* Parameters of the state machine. */