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Lup Yuen Lee 2024-07-05 10:40:08 +08:00
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@ -71,7 +71,7 @@ Our Emulator crashes at a strange address...
# `auipc` Overflow in Boot Code # `auipc` Overflow in Boot Code
When we __Boot our Emulator__ with SG2000 NuttX, it crashes... When we __Boot our Emulator__ with SG2000 NuttX, it crashes (pic above)...
```bash ```bash
$ sg2000-emulator/temu nuttx.cfg $ sg2000-emulator/temu nuttx.cfg
@ -121,7 +121,7 @@ _Maybe auipc has a problem?_
We verify with the [__RISC-V Online Assembler__](https://riscvasm.lucasteske.dev/#). We verify with the [__RISC-V Online Assembler__](https://riscvasm.lucasteske.dev/#).
When we assemble the __`auipc`__ instruction above, the Online Assembler fails with an error... When we assemble the __`auipc`__ instruction above, the Online Assembler fails with an error (pic below)...
```yaml ```yaml
Error: lui expression not in range 0..1048575 Error: lui expression not in range 0..1048575
@ -137,7 +137,7 @@ Remember that RISC-V is a __RISC Platform__ after all. Some operations won't fit
We upsize to 8 bytes of Machine Code... We upsize to 8 bytes of Machine Code...
TODO: Pic of RISC-V Online Assembler ![TODO](https://lupyuen.github.io/images/sg2000b-asm1.png)
# Change `auipc` to `li` in Boot Code # Change `auipc` to `li` in Boot Code