b29: S18 poll-epilogue router

2026-09-13 12:23:15 +00:00
parent 0863405819
commit b7de1d80e0
5 changed files with 122 additions and 1 deletions
@@ -692,6 +692,21 @@ static void saimaa_machine_init(MachineState *machine)
                    cpu_physical_memory_write(0x08006C88 + k, &word, 4);
                }
            }
+            /* S18 stublet at 0x08006D22 (10B, b29): poll-epilogue router.
+             * movw/movt ip + bx ip to sbl_main 0x802f6a9. */
+            {
+                static const uint8_t s18[] = {
+                    0x4f, 0xf2, 0xa9, 0x6c, 0xc0, 0xf6, 0x02, 0x0c,
+                    0x60, 0x47,
+                };
+                size_t k;
+                for (k = 0; k < sizeof(s18); k += 4) {
+                    uint32_t word = 0;
+                    size_t n = sizeof(s18) - k < 4 ? sizeof(s18) - k : 4;
+                    __builtin_memcpy(&word, &s18[k], n);
+                    cpu_physical_memory_write(0x08006D22 + k, &word, 4);
+                }
+            }
            /* S17 safe-logger (50B @0x08006CF0, b26): print r1-string
             * via UARTDM-TF iff r1 in rodata [0x804B800,0x8058000);
             * pop-return (no leak). Replaces S8 silence with logs. */