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Fix .debug_line prologue header length calculation for 64-bit DWARF
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
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parent
e49341e87c
commit
1b182736a6
Notes:
svn2git
2020-12-20 02:59:44 +00:00
svn path=/head/; revision=256692
@ -1271,6 +1271,7 @@ out_debug_line (segT line_seg)
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symbolS *line_end;
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struct line_seg *s;
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enum dwarf2_format d2f;
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int sizeof_initial_length;
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int sizeof_offset;
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subseg_set (line_seg, 0);
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@ -1287,27 +1288,24 @@ out_debug_line (segT line_seg)
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d2f = DWARF2_FORMAT ();
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if (d2f == dwarf2_format_32bit)
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{
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expr.X_add_number = -4;
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emit_expr (&expr, 4);
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sizeof_offset = 4;
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sizeof_initial_length = sizeof_offset = 4;
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}
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else if (d2f == dwarf2_format_64bit)
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{
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expr.X_add_number = -12;
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out_four (-1);
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emit_expr (&expr, 8);
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sizeof_initial_length = 12;
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sizeof_offset = 8;
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out_four (-1);
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}
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else if (d2f == dwarf2_format_64bit_irix)
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{
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expr.X_add_number = -8;
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emit_expr (&expr, 8);
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sizeof_offset = 8;
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sizeof_initial_length = sizeof_offset = 8;
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}
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else
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{
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as_fatal (_("internal error: unknown dwarf2 format"));
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}
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expr.X_add_number = -sizeof_initial_length;
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emit_expr (&expr, sizeof_offset);
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/* Version. */
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out_two (2);
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@ -1316,7 +1314,7 @@ out_debug_line (segT line_seg)
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expr.X_op = O_subtract;
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expr.X_add_symbol = prologue_end;
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expr.X_op_symbol = line_start;
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expr.X_add_number = - (4 + 2 + 4);
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expr.X_add_number = - (sizeof_initial_length + 2 + sizeof_offset);
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emit_expr (&expr, sizeof_offset);
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/* Parameters of the state machine. */
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