On Mon, Sep 25, 2017 at 12:41 PM, Segher Boessenkool <segher@xxxxxxxxxxxxxxxxxxx> wrote: > On Mon, Sep 25, 2017 at 04:01:55PM +0000, David Laight wrote: >> From: Segher Boessenkool >> > The compiler puts this item in .sdata, for 32-bit. There is no .srodata, >> > so if it wants to use a small data section, it must use .sdata . >> > >> > Non-external, non-referenced symbols are not put in .sdata, that is the >> > difference you see with the "static". >> > >> > I don't think there is a bug here. If you think there is, please open >> > a GCC bug. >> >> The .sxxx sections are for 'small' data that can be accessed (typically) >> using small offsets from a global register. >> This means that all sections must be adjacent in the image. >> So you can't really have readonly small data. >> >> My guess is that the linker script is putting .srodata in with .sdata. > > .srodata does not *exist* (in the ABI). So, I still think this is a bug. The variable is marked const: this is not a _suggestion_. :) If the compiler produces output where the variable is writable, that's a bug. I can't tell if this bug is related: https://gcc.gnu.org/bugzilla/show_bug.cgi?id=9571 -Kees -- Kees Cook Pixel Security -- To unsubscribe, send a message with 'unsubscribe linux-mm' in the body to majordomo@xxxxxxxxx. For more info on Linux MM, see: http://www.linux-mm.org/ . Don't email: <a href=mailto:"dont@xxxxxxxxx";> email@xxxxxxxxx </a>
