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plan9 debuginfo: fix case where pc change is > 64 * inst quanta

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This commit is contained in:
Jacob G-W
2022-01-06 22:46:55 -05:00
parent 77f230ebd8
commit 4d6849ceb8
1 changed files with 10 additions and 1 deletions
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11
src/arch/x86_64/Isel.zig
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@@ -753,7 +753,16 @@ fn dbgAdvancePCAndLine(isel: *Isel, line: u32, column: u32) InnerError!void {
const d_pc_p9 = @intCast(i64, delta_pc) - quant;
if (d_pc_p9 > 0) {
// minus one because if its the last one, we want to leave space to change the line which is one quanta
try dbg_out.dbg_line.append(@intCast(u8, @divExact(d_pc_p9, quant) + 128) - quant);
var diff = @divExact(d_pc_p9, quant) - quant;
while (diff > 0) {
if (diff < 64) {
try dbg_out.dbg_line.append(@intCast(u8, diff + 128));
diff = 0;
} else {
try dbg_out.dbg_line.append(@intCast(u8, 64 + 128));
diff -= 64;
}
}
if (dbg_out.pcop_change_index.*) |pci|
dbg_out.dbg_line.items[pci] += 1;
dbg_out.pcop_change_index.* = @intCast(u32, dbg_out.dbg_line.items.len - 1);