[PATCH V2] mkimage: fix segfault on MacOS arm64

[Sergey V. Lobanov]

CC: Jessica Clarke

> On 17 Jan 2022, at 02:07, Sergey V. Lobanov <sergey at lobanov.in> wrote:
> 
> mkimage segfaults due ASLR mechasim on MacOS arm64
> 
> It is required to use _dyld_get_image_vmaddr_slide()
> to prevent segfault on MacOS arm64
> 
> This patch ased on the discussion
> https://github.com/u-boot/u-boot/commit/3b142045e8a7f0ab17b6099e9226296af45967d0
> 
> Thanks to Ronny Kotzschmar and ptpt52 github user
> 
> Signed-off-by: Sergey V. Lobanov <sergey at lobanov.in>
> ---
> tools/imagetool.h | 2 ++
> 1 file changed, 2 insertions(+)
> 
> diff --git a/tools/imagetool.h b/tools/imagetool.h
> index e229a34ffc..a0985d93d2 100644
> --- a/tools/imagetool.h
> +++ b/tools/imagetool.h
> @@ -271,11 +271,13 @@ int rockchip_copy_image(int fd, struct image_tool_params *mparams);
>  *  b) we need a API call to get the respective section symbols */
> #if defined(__MACH__)
> #include <mach-o/getsect.h>
> +#include <mach-o/dyld.h>
> 
> #define INIT_SECTION(name)  do {					\
> 		unsigned long name ## _len;				\
> 		char *__cat(pstart_, name) = getsectdata("__DATA",	\
> 			#name, &__cat(name, _len));			\
> +		__cat(pstart_, name) += _dyld_get_image_vmaddr_slide(0);\
> 		char *__cat(pstop_, name) = __cat(pstart_, name) +	\
> 			__cat(name, _len);				\
> 		__cat(__start_, name) = (void *)__cat(pstart_, name);	\
> -- 
> 2.32.0 (Apple Git-132)
>