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Type:
Bug
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Resolution: Duplicate
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Priority:
Not Prioritized
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Code Generation Tools
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CODEGEN-12508
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C2000_22.6.1.LTS
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default
The attached file.c has these lines.
__attribute__((retain, location(0xC001))) int TEST_FirstVariable = 0xABCD; __attribute__((retain, location(0xC002))) long TEST_SecondVariable = 0x12345678; __attribute__((retain, location(0xC004))) long TEST_ThirdVariable = 0xE9F0A1B2;
Build it, then create the disassembly.
$ cl2000 --abi=eabi file.c -z -o file.out -m file.map lnk.cmd $ dis2000 --all file.out > file_dis.txt
Inspect the disassembly. Find these lines ...
000800f2 0001 .word 0x0001 000800f3 0000 .word 0x0000 000800f4 0002 .word 0x0002 000800f5 0000 .word 0x0000 000800f6 abcd .word 0xabcd 000800f7 0000 .word 0x0000 000800f8 __TI_Handler_Table_Base: 000800f8 0002 .word 0x0002 000800f9 0008 .word 0x0008 000800fa 00cd .word 0x00cd 000800fb 0008 .word 0x0008 000800fc __TI_Handler_Table_Limit: 000800fc __TI_CINIT_Base: 000800fc 00dc .word 0x00dc 000800fd 0008 .word 0x0008 000800fe c006 .word 0xc006 000800ff 0000 .word 0x0000 00080100 00e6 .word 0x00e6 00080101 0008 .word 0x0008 00080102 c002 .word 0xc002 00080103 0000 .word 0x0000 00080104 00ec .word 0x00ec 00080105 0008 .word 0x0008 00080106 c004 .word 0xc004 00080107 0000 .word 0x0000 00080108 00f2 .word 0x00f2 00080109 0008 .word 0x0008 0008010a c001 .word 0xc001 0008010b 0000 .word 0x0000
The .cinit record that begins at 00080108 is for the variable Test_FirstVariable (address 0000c001). The source data for this record begins at 000800f2. The first word of the source data contains an index value of 1, which means this is a decompressed data record. The second word is padding. The next 2 words form a 32-bit value that is the number of 16-bit words to copy. It contains 2, when it should contain 1. This is followed by one word of data, and a final word of padding. To be specific, 000800f4 contains 2, when it should contain 1.
When the startup code processes these records, Test_SecondVariable (a long) is initialized before Test_FirstVariable (an int). The initialization of Test_FirstVariable, by writing 1 word more than it should, overwrites the first word of Test_SecondVariable.
