FreeCalypso > hg > freecalypso-tools
view target-utils/buzplayer/main.c @ 965:2969032bdfac
fcup-smsend[mult]: fix buglet in K&R C NULL pointer passing
The only 100% safe way to pass a NULL pointer as a function argument
in K&R C is to cast 0 to a pointer type; failing to do so may cause
mysterious bugs (invalid stack frames or garbage in argument registers)
on 64-bit machines. This issue has already been fixed in most of
FC host tools, but I just found some missed spots: passing of NULL UDH
to PDU encoding functions in fcup-smsend[mult] in the case of single
(not concatenated) SMS.
author | Mychaela Falconia <falcon@freecalypso.org> |
---|---|
date | Fri, 01 Sep 2023 07:33:51 +0000 |
parents | 9092ff68e37d |
children |
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line source
#include "types.h" #include "melody.h" extern char _end[]; struct melentry *melody_buf_start, *melody_buf_tailptr; int melody_mode; main() { uart_select_init(); printf("FreeCalypso buzzer player running\n"); print_boot_rom_info(); *(volatile u16 *)0xfffe4806 = 0xFFF3; /* enable ARMIO clock */ timer_init(); melody_buf_start = (struct melentry *) _end; melody_buf_tailptr = melody_buf_start; for (;;) { putchar('='); if (command_entry()) command_dispatch(); } }