<div dir="auto"><div><br><div class="gmail_extra"><br><div class="gmail_quote">On Jun 20, 2017 1:20 AM, "Denis Obrezkov" <<a href="mailto:denisobrezkov@gmail.com">denisobrezkov@gmail.com</a>> wrote:<br type="attribution"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="elided-text"><div class="gmail_quote">2017-06-20 4:00 GMT+03:00 Joel Sherrill <span dir="ltr"><<a href="mailto:joel@rtems.org" target="_blank">joel@rtems.org</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><span><div><br><div class="gmail_extra"><br><div class="gmail_quote">On Jun 19, 2017 5:37 PM, "Denis Obrezkov" <<a href="mailto:denisobrezkov@gmail.com" target="_blank">denisobrezkov@gmail.com</a>> wrote:<br type="attribution"><blockquote class="m_-5519462856291815519m_3835299892009649757quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="m_-5519462856291815519m_3835299892009649757elided-text"><div class="gmail_quote">2017-06-20 1:23 GMT+03:00 Hesham Almatary <span dir="ltr"><<a href="mailto:heshamelmatary@gmail.com" target="_blank">heshamelmatary@gmail.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><br><div class="gmail_extra"><br><div class="gmail_quote"><span>On Tue, Jun 20, 2017 at 7:33 AM, Denis Obrezkov <span dir="ltr"><<a href="mailto:denisobrezkov@gmail.com" target="_blank">denisobrezkov@gmail.com</a>></span> wrote:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><span class="m_-5519462856291815519m_3835299892009649757m_-363544439721966365m_3115160688977774507gmail-">2017-06-20 0:19 GMT+03:00 Joel Sherrill <span dir="ltr"><<a href="mailto:joel@rtems.org" target="_blank">joel@rtems.org</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto">Check the value in gdb without loading it on a target.<div dir="auto"><br></div><div dir="auto">Gdb hello.exe</div><div dir="auto"><br></div><div dir="auto">p symbol </div></div></blockquote><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div dir="auto"><br></div><div dir="auto">Since it is a constant, it should be as expected. If it is, you have a code loading issue.</div></div></blockquote></span><div>Yes, it is 512 in gdb, as expected. So, is the problem with linkcmd file? </div><span class="m_-5519462856291815519m_3835299892009649757m_-363544439721966365m_3115160688977774507gmail-"><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="auto"><div dir="auto"><br></div><div dir="auto">Is that value by any chance an instruction? </div></div></blockquote></span></div></div></div></blockquote></span><div>No don't think so.<br> <br></div><span><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>How to check whether it is an instruction or not?</div><div><br></div></div></div></div></blockquote></span><div>You can check if this value might match with any riscv32 instruction encodings (I believe it doesn't). See Chapter 19 (RV32/64G Instruction Set Listings) user-level riscv-spec 2.3-draft. You can also use riscv32-rtems4.12-objdump on your binary and search for this value.<br><br></div><span><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left:1px solid rgb(204,204,204);padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div></div><div>I was also able to run gdb, connect to the target, change the value of the variable to 512,</div><div>reconnect to the target, make loading and read the value equal to 512.</div></div><span class="m_-5519462856291815519m_3835299892009649757m_-363544439721966365m_3115160688977774507gmail-HOEnZb"><font color="#888888"><br><br clear="all"><div><br></div>-- <br><div class="m_-5519462856291815519m_3835299892009649757m_-363544439721966365m_3115160688977774507gmail-m_6857958987714243169gmail_signature">Regards, Denis Obrezkov</div>
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</blockquote></div><div class="gmail_extra"><br></div></div>I didn't find this value in objdump<br>I think that .data section wasn't properly initialized, does it look reasonable?</div></div></blockquote></div></div></div><div dir="auto"><br></div></span><div dir="auto">I suspect it means that the image is not properly loaded into memory. Download but don't execute. Then check the address. </div><div dir="auto"><br></div><div dir="auto">If it correct on download, then binary search with breakpoints and checking the memory. Or set a hardware watchpoint on a write to that address.</div><div dir="auto"><br></div><div dir="auto">Hesham.. does the crt code have to copy a secondary copy of the .data initial values into place on this bsp?</div><div dir="auto"><br></div><div dir="auto"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="m_-5519462856291815519m_3835299892009649757quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><font color="#888888"><br clear="all"><span class="m_-5519462856291815519HOEnZb"><font color="#888888"><div><br></div>-- <br><div class="m_-5519462856291815519m_3835299892009649757m_-363544439721966365gmail_signature" data-smartmail="gmail_signature">Regards, Denis Obrezkov</div>
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</blockquote></div></div>The wrong value is present right after loading, before the execution.</div></div></blockquote></div></div></div><div dir="auto"><br></div><div dir="auto">That sounds like either a memory map problem, a download format problem or something more bizarre. </div><div dir="auto"><br></div><div dir="auto">Can you run programs compiled with the bare elf toolset? If so, then there is a discrepancy between your linkcmds, download format, etc from the bare metal toolset.</div><div dir="auto"><div class="gmail_extra"><div class="gmail_quote"><blockquote class="quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><font color="#888888"><br clear="all"><div><br></div>-- <br><div class="m_-5519462856291815519gmail_signature" data-smartmail="gmail_signature">Regards, Denis Obrezkov</div>
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