Re: [Qemu-arm] [RFC PATCH for semihosting-tests] semihosting tests: add v7m tests

[Alex Bennée]

Alex Bennée <address@hidden> writes:

> M-profile has yet another way of triggering semihosting calls using
> the BKPT instruction. To support this we need to add a M-profile setup
> so we use the nice and simple microbit model which has a Cortex-M0 in
> it.
>
> Signed-off-by: Alex Bennée <address@hidden>
> ---
>  Makefile         | 24 ++++++++++++++++++++---
>  microbit.lds     | 32 ++++++++++++++++++++++++++++++
<snip>
> --- /dev/null
> +++ b/microbit.lds
> @@ -0,0 +1,32 @@
> +/*
> + * microbit.lds : simple linker script for baremetal ARM-M test cases
> + *
> + * Copyright (C) 2019 Linaro Limited. All rights reserved.
> + *
> + * Memory layout is for the BBC Microbit board which puts RAM at 0x20000000
> + */
> +
> +RAMSTART = 0x20000000;
> +STACKTOP = 0x20004000;
> +
> +ENTRY(exc_reset_thumb)
> +
> +SECTIONS
> +{
> +    . = 0x0;
> +    .text : {
> +        *(.text)
> +    }
> +    .data : {
> +        *(.data)
> +    }
> +    .rodata : {
> +        *(.rodata)
> +    }
> +    .bss : {
> +        *(.bss)
> +    }
> +    /DISCARD/ : {
> +        *(.ARM.attributes)
> +    }
> +}

And it would help of course if data was is the read/write area.

-    .data : {
-        *(.data)
-    }
     .rodata : {
         *(.rodata)
     }
+    . = RAMSTART;
+    .data : {
+        *(.data)
+    }
     .bss : {
         *(.bss)
     }

--
Alex Bennée