boot2

commit e7a073b8699c74f2e9c025078fb275323711a8e1
parent 67b8fdb86aedb707c973b5f8849f2bf2304a1e0a
Author: Ryan Sepassi <rsepassi@gmail.com>
Date:   Sun,  3 May 2026 19:28:36 -0700

hex2pp.P1: fix BSS arena overlap on >1 MiB inputs

The cumulative-offset hex literals for output_buf / text_buf / labels
had the high digit in the wrong byte position, so they decoded as ~1/2/3
MiB offsets instead of the intended 16/144/152 MiB. input_buf (sized for
16 MiB) overlapped output_buf, and pass 2's emit_byte clobbered the
unread tail of input as it wrote — surfacing as "byte stream: incomplete
digits" once the scanner read freshly-emitted output bytes. Inputs ≤1 MiB
fit before the overlap and were unaffected.

Unblocks the tcc-boot2 link (combined.M1pp ~4.6 MiB).

Diffstat:
M
hex2pp/hex2pp.P1
 | 
10
+++++++---

1 file changed, 7 insertions(+), 3 deletions(-)
diff --git a/hex2pp/hex2pp.P1 b/hex2pp/hex2pp.P1
@@ -77,10 +77,14 @@ DEFINE H2_OFF_other_buf      4021000000000000
 DEFINE H2_OFF_pat_buf        4031000000000000
 DEFINE H2_OFF_ev_bytes       4041000000000000
 DEFINE H2_OFF_df_byte        5041000000000000
+## input_buf:  0x004200 + 16 MiB
+## output_buf: 0x1004200 + 128 MiB
+## text_buf:   0x9004200 + 8 MiB
+## labels:     0x9804200 + 32 MiB (end at ~184 MiB; ELF p_memsz is 512 MiB).
 DEFINE H2_OFF_input_buf      0042000000000000
-DEFINE H2_OFF_output_buf     0042100000000000
-DEFINE H2_OFF_text_buf       0042200000000000
-DEFINE H2_OFF_labels         0042300000000000
+DEFINE H2_OFF_output_buf     0042000100000000
+DEFINE H2_OFF_text_buf       0042000900000000
+DEFINE H2_OFF_labels         0042800900000000
 
 ## --- p1_main: argv parse -> load input -> two passes -> write -> exit ------