hello Nick:
thank you for your prompt response. i have seen your crt0.S.
- the first file to be linked is an ARM assembly .s file
that contains the ARM vector table and handler addresses.
the vector table is in a separate section called .VhaInit.
Did you know that you can use the KEEP directive in a linker script (or
a linker script fragment) in order to make sure that the .VhaInit
section is not garbage collected ?
yes. i avoided using a linker script. i use objcopy and move the
LMA as needed for ROM programs.
- when i add code to access .VhaInit entries from .text to prevent the
garbage collection of .VhaInit, Thumb Interworking code is ZERO. the
entries are present, but no interworking code is present.
What sort of code are you adding and how are you adding it ?
.section .VhaInit, "a"
.align 0
AppTextVha:
@ V: ARM Vectors
ResetVec: LDR PC, ResetAddr @ Reset
[...]
@ HA: our Handler Addresses
ResetAddr: .word ResetHandler @ Reset
[...]
AppTextVStart:
@ UH: our Unused Handlers
ResetHolder: B . @ Reset
LDR R1, =AppTextVha
LDR R1, =AppTextVStart
- when i remove code that accesses .VhaInit, Interworking code is
correct.
You try to isolate whether this really is a linker bug. (It
certainly sounds like it is). If you can reproduce the problem
just using assembler source files then please file a bug report
with the binutils project (at http://sourceware.org/bugzilla).
Including a *small* test case will really help.
okay. i will send you one.
thank you once again,
Aaron
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