Stack pointer check with Keil toolchain

Sysprogs forums › Forums › VisualGDB › Stack pointer check with Keil toolchain

Log In Register Lost Password
Viewing 3 posts - 1 through 3 (of 3 total)
  • Author
    Posts
  • March 13, 2017 at 21:05 #10653
    mmoore
    Participant

    I’m configuring a project to use VS/VisualGDB and the Keil toolchain.  I am working through various issues and have been mostly successful.  The project will build, load and debug.  I am able to hit breakpoints and read memory and registers.  One of the few remaining issues is this error when I load a debug session:

    Cannot resolve the address of _estack. Skipping stack pointer validity check.

    The keil toolchain uses the symbol __initial_sp for the stack pointer.  I would assume _estack to be the GCC equivalent?  Is there an XML file that I can tweak to get the check working and squelch the warning?  Or an ELF file edit for the Makefile?  If not, would you consider adding support for this?

    March 13, 2017 at 21:36 #10654
    mmoore
    Participant

    I may have answered my own question.  I modified the ELF config command as follows:

    ifeq ($(TARGETTYPE),APP)

    ROM_SECTION_NAME := ER_IROM1

    $(BINARYDIR)/$(TARGETNAME): $(all_objs) $(EXTERNAL_LIBS)

    $(LD) -o $(@:.elf=.axf) $(LDFLAGS) $(START_GROUP) $(all_objs) $(LIBRARY_LDFLAGS) $(END_GROUP)

    $(FROMELF) –bin –output $(@:.elf=.bin) $(@:.elf=.axf)

    $(OBJCOPY) –redefine-sym __initial_sp=_estack \

    –remove-section $(ROM_SECTION_NAME) \

    –add-section $(ROM_SECTION_NAME)=$(@:.elf=.bin) \

    –set-section-flags \

    $(ROM_SECTION_NAME)=CONTENTS,ALLOC,LOAD,READONLY,CODE \

    –change-section-address $(ROM_SECTION_NAME)=0x00029000 \

    $(@:.elf=.axf) $@

    endif

    The –redefine-sym __initial_sp=_estack argument renames the stack pointer symbol.  This appears to satisfy the debugger, as it no longer complains.  Are there any negative ramifications to this approach?

    March 15, 2017 at 04:57 #10660
    support
    Keymaster

    Hi,

    The solution you have found should work. You can also override the _estack symbol name by editing the .vgdbsettings file (search for the ‘EndOfStackSymbol’ element).

  • Author
    Posts
Log In Register Lost Password
Viewing 3 posts - 1 through 3 (of 3 total)
  • You must be logged in to reply to this topic.