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I am evaluating VisualGDB for use with MSP430 and STM32F4xx processors and have a question regarding the linker and memory map of the MSP430. Currently, I am porting an MSP430 application developed using TI CCSv5 to work with VisualGDB. We have a custom Bootloader (BSL) running that launches the application and the BSL executes from address 0x4400 (default). When the MSP430F5528 starts up, the BSL determines if a valid application is present and remaps the Interrupt Vector table from the application flash (0x6800) into RAM and calls the application Reset Vector (0x687E) that points to the main() function of the application sitting at address 0x6880. Is it possible to modify the linker memory map in VisualGDB or can I pass the compiler/linker the existing memory map from CCSv5? In CCSv5 it is a lnk_msp430f5528.cmd file.
Below is an excerpt from the linker file with the remapped addresses:
/****************************************************************************/ /* SPECIFY THE SYSTEM MEMORY MAP */ /****************************************************************************/ MEMORY { SFR : origin = 0x0000, length = 0x0010 PERIPHERALS_8BIT : origin = 0x0010, length = 0x00F0 PERIPHERALS_16BIT : origin = 0x0100, length = 0x0100 BSLRAM : origin = 0x2400, length = 0x0002 FRAM : origin = 0x2402, length = 0x0002 RAM : origin = 0x2404, length = 0x1F7C RAMINTVEC : origin = 0x4380, length = 0x0080 INFOA : origin = 0x1980, length = 0x0080 INFOB : origin = 0x1900, length = 0x0080 INFOD : origin = 0x1800, length = 0x0100 BSL : origin = 0x4400, length = 0x2380 UNIT_DATA : origin = 0x6780, length = 0x0080 INT00 : origin = 0x6800, length = 0x0002 INT01 : origin = 0x6802, length = 0x0002 INT02 : origin = 0x6804, length = 0x0002 INT03 : origin = 0x6806, length = 0x0002 INT04 : origin = 0x6808, length = 0x0002 INT05 : origin = 0x680A, length = 0x0002 INT06 : origin = 0x680C, length = 0x0002 INT07 : origin = 0x680E, length = 0x0002 INT08 : origin = 0x6810, length = 0x0002 INT09 : origin = 0x6812, length = 0x0002 INT10 : origin = 0x6814, length = 0x0002 INT11 : origin = 0x6816, length = 0x0002 INT12 : origin = 0x6818, length = 0x0002 INT13 : origin = 0x681A, length = 0x0002 INT14 : origin = 0x681C, length = 0x0002 INT15 : origin = 0x681E, length = 0x0002 INT16 : origin = 0x6820, length = 0x0002 INT17 : origin = 0x6822, length = 0x0002 INT18 : origin = 0x6824, length = 0x0002 INT19 : origin = 0x6826, length = 0x0002 INT20 : origin = 0x6828, length = 0x0002 INT21 : origin = 0x682A, length = 0x0002 INT22 : origin = 0x682C, length = 0x0002 INT23 : origin = 0x682E, length = 0x0002 INT24 : origin = 0x6830, length = 0x0002 INT25 : origin = 0x6832, length = 0x0002 INT26 : origin = 0x6834, length = 0x0002 INT27 : origin = 0x6836, length = 0x0002 INT28 : origin = 0x6838, length = 0x0002 INT29 : origin = 0x683A, length = 0x0002 INT30 : origin = 0x683C, length = 0x0002 INT31 : origin = 0x683E, length = 0x0002 INT32 : origin = 0x6840, length = 0x0002 INT33 : origin = 0x6842, length = 0x0002 INT34 : origin = 0x6844, length = 0x0002 INT35 : origin = 0x6846, length = 0x0002 INT36 : origin = 0x6848, length = 0x0002 INT37 : origin = 0x684A, length = 0x0002 INT38 : origin = 0x684C, length = 0x0002 INT39 : origin = 0x684E, length = 0x0002 INT40 : origin = 0x6850, length = 0x0002 INT41 : origin = 0x6852, length = 0x0002 INT42 : origin = 0x6854, length = 0x0002 INT43 : origin = 0x6856, length = 0x0002 INT44 : origin = 0x6858, length = 0x0002 INT45 : origin = 0x685A, length = 0x0002 INT46 : origin = 0x685C, length = 0x0002 INT47 : origin = 0x685E, length = 0x0002 INT48 : origin = 0x6860, length = 0x0002 INT49 : origin = 0x6862, length = 0x0002 INT50 : origin = 0x6864, length = 0x0002 INT51 : origin = 0x6866, length = 0x0002 INT52 : origin = 0x6868, length = 0x0002 INT53 : origin = 0x686A, length = 0x0002 INT54 : origin = 0x686C, length = 0x0002 INT55 : origin = 0x686E, length = 0x0002 INT56 : origin = 0x6870, length = 0x0002 INT57 : origin = 0x6872, length = 0x0002 INT58 : origin = 0x6874, length = 0x0002 INT59 : origin = 0x6876, length = 0x0002 INT60 : origin = 0x6878, length = 0x0002 INT61 : origin = 0x687A, length = 0x0002 INT62 : origin = 0x687C, length = 0x0002 RESET : origin = 0x687E, length = 0x0002 FLASH : origin = 0x6880, length = 0x9580 RSVDBOOTVEC : origin = 0xFE00, length = 0x0200 FLASH2 : origin = 0x10000,length = 0x14400 } /****************************************************************************/ /* SPECIFY THE SECTIONS ALLOCATION INTO MEMORY */ /****************************************************************************/ SECTIONS { .bss : {} > RAM /* GLOBAL & STATIC VARS */ .sysmem : {} > RAM /* DYNAMIC MEMORY ALLOCATION AREA */ .stack : {} > RAM (HIGH) /* SOFTWARE SYSTEM STACK */ .keys : {} > BSLRAM /* BSL Update Keys */ .fram : {} > FRAM /* Flash password */ .unitdata : {} > UNIT_DATA /* THE UNIT INFO */ .text : {} > FLASH | FLASH2 /* CODE */ .text:_isr : {} > FLASH /* ISR CODE SPACE */ .cinit : {} > FLASH /* INITIALIZATION TABLES */ .const : {} > FLASH | FLASH2 /* CONSTANT DATA */ .cio : {} > RAM /* C I/O BUFFER */ .pinit : {} > FLASH /* C++ CONSTRUCTOR TABLES */ .infoA : {} > INFOA /* MSP430 INFO FLASH MEMORY SEGMENTS */ .infoB : {} > INFOB .infoC : {} > INFOD .infoD : {} > INFOD .motordata : {} > INFOD .int00 : {} > INT00 /* MSP430 INTERRUPT VECTORS */ .int01 : {} > INT01 .int02 : {} > INT02 .int03 : {} > INT03 .int04 : {} > INT04 .int05 : {} > INT05 .int06 : {} > INT06 .int07 : {} > INT07 .int08 : {} > INT08 .int09 : {} > INT09 .int10 : {} > INT10 .int11 : {} > INT11 .int12 : {} > INT12 .int13 : {} > INT13 .int14 : {} > INT14 .int15 : {} > INT15 .int16 : {} > INT16 .int17 : {} > INT17 .int18 : {} > INT18 .int19 : {} > INT19 .int20 : {} > INT20 .int21 : {} > INT21 .int22 : {} > INT22 .int23 : {} > INT23 .int24 : {} > INT24 .int25 : {} > INT25 .int26 : {} > INT26 .int27 : {} > INT27 .int28 : {} > INT28 .int29 : {} > INT29 .int30 : {} > INT30 .int31 : {} > INT31 .int32 : {} > INT32 .int33 : {} > INT33 .int34 : {} > INT34 .int35 : {} > INT35 .int36 : {} > INT36 .int37 : {} > INT37 .int38 : {} > INT38 .int39 : {} > INT39 .int40 : {} > INT40 .int41 : {} > INT41 .int42 : {} > INT42 .int43 : {} > INT43 .int44 : {} > INT44 .int45 : {} > INT45 .int46 : {} > INT46 .int47 : {} > INT47 .int48 : {} > INT48 .int49 : {} > INT49 .int50 : {} > INT50 .int51 : {} > INT51 .int52 : {} > INT52 .int53 : {} > INT53 .int54 : {} > INT54 .int55 : {} > INT55 .int56 : {} > INT56 .int57 : {} > INT57 .int58 : {} > INT58 .int59 : {} > INT59 .int60 : {} > INT60 .int61 : {} > INT61 .int62 : {} > INT62 .reset : {} > RESET /* MSP430 RESET VECTOR */ } /****************************************************************************/ /* INCLUDE PERIPHERALS MEMORY MAP */ /****************************************************************************/ -l msp430f5528.cmdHi,
You should be able to modify the original mspgcc linker script. Normally mspgcc uses the msp430.x script located in <SysGCC>\msp430\msp430\lib\ldscripts that in turn includes msp430f5528\memory.x and msp430f5528\periph.x for device-specific data. You can make your own script based on msp430.x and specify it via the -T linker flag (i.e. add -Tc:/path/to/my-script.x to LDFLAGS).
You can also try reusing the script from Code Composer, however you may need to adjust it to compensate for the differences in interrupt handling (.vectors section vs .intXX sections) and to include peripheral address definitions from periph.x.
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