banner stub: preserve lr, pop-return to caller

2026-09-11 07:15:31 +00:00
parent 61ddf9de6b
commit e473826732
2 changed files with 10 additions and 12 deletions
@@ -440,17 +440,13 @@ static void saimaa_machine_init(MachineState *machine)
                }
            }
            /* Banner stub at 0x08062150: print r0 string via UARTDM
-             * (b16 redirects 0x802f690 blx here). Built from qemu/banner.S */
+             * (b16 redirects 0x802f690 blx here). Built from qemu/banner.S:
+             * push/pop frame, preserves lr, returns r0=0 to caller. */
            {
                static const uint8_t bn[] = {
-                    0x4f, 0xf2, 0x00, 0x03, /* movw r3,#0xf000 */
-                    0xc0, 0xf2, 0x8a, 0x73, /* movt r3,#0x78a */
-                    0x10, 0xf8, 0x01, 0x1b, /* ldrb r1,[r0],#1 */
-                    0x09, 0xb1,             /* cbz r1,done */
-                    0x19, 0x67,             /* str r1,[r3,#0x70] */
-                    0xfa, 0xe7,             /* b loop */
-                    0x00, 0x20,             /* movs r0,#0 */
-                    0x70, 0x47,             /* bx lr */
+                    0x10, 0xb5, 0x4f, 0xf2, 0x00, 0x03, 0xc0, 0xf2,
+                    0x8a, 0x73, 0x10, 0xf8, 0x01, 0x1b, 0x09, 0xb1,
+                    0x19, 0x67, 0xfa, 0xe7, 0x00, 0x20, 0x10, 0xbd,
                };
                size_t k;
                for (k = 0; k < sizeof(bn); k += 4) {