解决relocation truncated to fit: R_PPC_ADDR24 的问题

 

将BSP包makefile中的RAM_HIGH_ADRS 修改为 0x08000000

 

编译时会报以下错误：

intALib.o(.text+0x1fc): relocation truncated to fit: R_PPC_ADDR24 noActionIntEnt

详细问题表述见http://www.vxworksos.info/ae-problem-building-a-bootapp-with-ram_high_adrs-higher-than-0x03f00000

 

问题描述：

I’m trying to build a bootApp in Tornado AE of a custom BSP (A
modified version of ads860 BSP).  My board needs to have ROM_BASE_ADRS
= 0×00000000 and LOCAL_MEM_LOCAL_ADRS = 0×50000000.  I set
RAM_HIGH_ADRS = 0×50300000, RAM_LOW_ADRS = 0×50010000, ROM_TEXT_ADRS =
0×00000100 and ROM_SIZE = 0×00280000 in both 00bsp.cdf and makefile.
When I try to build the bootApp, I always received the following
error:

ldppc -X -e usrInit -Ttext 50300000 $/(PRJ_OBJS/) $/(bootKernel_OBJS/)
-o bootApp_reloc
C:/Tornado_AE/target/lib/objPPC860gnuvx/excConnectALib.o: In function
`excConnectCode’:
C:/Tornado_AE/target/lib/objPPC860gnuvx/excConnectALib.o(.data+0×28):
relocation truncated to fit: R_PPC_ADDR24 excEnt
C:/Tornado_AE/target/lib/objPPC860gnuvx/excConnectALib.o(.data+0×34):
relocation truncated to fit: R_PPC_ADDR24 excExcHandle
C:/Tornado_AE/target/lib/objPPC860gnuvx/excConnectALib.o(.data+0x3c):
relocation truncated to fit: R_PPC_ADDR24 excExit
C:/Tornado_AE/target/lib/objPPC860gnuvx/excConnectALib.o(.data+0×48):
relocation truncated to fit: R_PPC_ADDR24 excEnt
C:/Tornado_AE/target/lib/objPPC860gnuvx/excConnectALib.o(.data+0×54):
relocation truncated to fit: R_PPC_ADDR24 excExcHandle
C:/Tornado_AE/target/lib/objPPC860gnuvx/excConnectALib.o(.data+0x5c):
relocation truncated to fit: R_PPC_ADDR24 excExit
C:/Tornado_AE/target/lib/objPPC860gnuvx/excConnectALib.o(.data+0×68):
relocation truncated to fit: R_PPC_ADDR24 excEnt
C:/Tornado_AE/target/lib/objPPC860gnuvx/excConnectALib.o(.data+0×74):
relocation truncated to fit: R_PPC_ADDR24 excExcHandle
C:/Tornado_AE/target/lib/objPPC860gnuvx/excConnectALib.o(.data+0x7c):
relocation truncated to fit: R_PPC_ADDR24 excExit

make[1]: *** [bootApp_reloc] Error 0×1
make[1]: Leaving directory `R:/bootApp/test_ads/PPC860gnu_romCopy’
make: Leaving directory `R:/bootApp/test_ads’
make: *** [bootApp_romCopy] Error 0×2

It seems that I cannot modified RAM_LOW_ADRS and RAM_HIGH_ADRS to be
higher than 0x03F00000 approximately.

Is their anyone that have an idea about the nature of my problem?

Thanks.

David

 

 

解决办法1：

My hunch is that the assembly language module excConnectALib.s, which sounds
like it provides support for connecting to the exception vectors in low
memory, uses instructions with 24-bit effective address operands. Relocating
the code where you did makes this exceed the 24 bits available to generate
the effective address.

If you have the source code, you should be able to see and possibly correct
the problem; otherwise, you are restricted to addresses below 0x00ffffff.

Out of curiosit