FreeCalypso > hg > fc-magnetite
annotate src/cs/system/bootloader/inc/serial.h @ 516:1ed9de6c90bd
src/g23m-gsm/sms/sms_for.c: bogus malloc removed
The new error handling code that was not present in TCS211 blob version
contains a malloc call that is bogus for 3 reasons:
1) The memory allocation in question is not needed in the first place;
2) libc malloc is used instead of one of the firmware's proper ways;
3) The memory allocation is made inside a function and then never freed,
i.e., a memory leak.
This bug was caught in gcc-built FreeCalypso fw projects (Citrine
and Selenite) because our gcc environment does not allow any use of
libc malloc (any reference to malloc produces a link failure),
but this code from TCS3.2 is wrong even for Magnetite: if this code
path is executed repeatedly over a long time, the many small allocations
made by this malloc call without a subsequent free will eventually
exhaust the malloc heap provided by the TMS470 environment, malloc will
start returning NULL, and the bogus code will treat it as an error.
Because the memory allocation in question is not needed at all,
the fix entails simply removing it.
| author | Mychaela Falconia <falcon@freecalypso.org> |
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| date | Sun, 22 Jul 2018 06:04:49 +0000 |
| parents | 945cf7f506b2 |
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| rev | line source |
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1 /******************************************************************************* |
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2 * |
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3 * SERIAL.H |
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4 * |
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5 * This module contains functions to send or receive commands on the USART 8251. |
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6 * Only polled mode is used. |
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7 * |
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8 * (C) Texas Instruments 1998 |
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9 * |
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10 ******************************************************************************/ |
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11 |
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12 #ifndef __SERIAL_H__ |
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13 #define __SERIAL_H__ |
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14 |
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15 #include "main/sys_types.h" |
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16 |
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17 /* |
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18 * ser_receive_command and ser_receive_char have 2 modes: |
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19 * SER_INFINITE : Waits until a command is received. |
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20 * SER_IMMEDIATE: Returns imediately even if no character is received. |
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21 */ |
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22 |
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23 enum { |
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24 SER_INFINITE, |
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25 SER_IMMEDIATE |
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26 }; |
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27 |
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28 /* |
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29 * Return values of ser_receive_data_for_flash. |
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30 */ |
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31 |
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32 enum { |
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33 SER_DATA_READY, |
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34 SER_DATA_ERROR, |
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35 SER_END_OF_FILE |
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36 }; |
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37 |
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38 extern void ser_wait_no_activity (SYS_UWORD8 device_id); |
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39 extern long ser_send_command (SYS_UWORD8 *command, SYS_UWORD8 device_id); |
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40 extern SYS_UWORD8 ser_receive_command (SYS_UWORD8 *command, int mode); |
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41 extern long ser_receive_data_for_flash (SYS_UWORD32 *address, SYS_UWORD16 *data, SYS_UWORD8 device_id); |
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42 extern void ser_initialize_flash_data_detection (void); |
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43 extern void ser_initialize_serial_link (void); |
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44 extern void ser_wait_last_character_sent (SYS_UWORD8 device_id); |
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45 |
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46 #endif /* __SERIAL_H__ */ |
