[This isn't really something that should be reviewed under global
reviewership, but if it's either that or nothing, I'll do it anyway...]
Christophe Lyon <christophe.l...@st.com> writes:
> 2019-XX-XX Christophe Lyon <christophe.l...@st.com>
> Mickaël Guêné <mickael.gu...@st.com>
>
> gcc/
> * config/arm/arm.opt: Add -mfdpic option.
> * doc/invoke.texi: Add documentation for -mfdpic.
>
> Change-Id: I0eabd1d11c9406fd4a43c4333689ebebbfcc4fe8
>
> diff --git a/gcc/config/arm/arm.opt b/gcc/config/arm/arm.opt
> index 9067d49..2ed3bd5 100644
> --- a/gcc/config/arm/arm.opt
> +++ b/gcc/config/arm/arm.opt
> @@ -306,3 +306,7 @@ Cost to assume for a branch insn.
> mgeneral-regs-only
> Target Report RejectNegative Mask(GENERAL_REGS_ONLY) Save
> Generate code which uses the core registers only (r0-r14).
> +
> +mfdpic
> +Target Report Mask(FDPIC)
> +Enable Function Descriptor PIC mode.
> diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
> index 29585cf..805d7cc 100644
> --- a/gcc/doc/invoke.texi
> +++ b/gcc/doc/invoke.texi
> @@ -703,7 +703,8 @@ Objective-C and Objective-C++ Dialects}.
> -mrestrict-it @gol
> -mverbose-cost-dump @gol
> -mpure-code @gol
> --mcmse}
> +-mcmse @gol
> +-mfdpic}
>
> @emph{AVR Options}
> @gccoptlist{-mmcu=@var{mcu} -mabsdata -maccumulate-args @gol
> @@ -17912,6 +17913,23 @@ MOVT instruction.
> Generate secure code as per the "ARMv8-M Security Extensions: Requirements on
> Development Tools Engineering Specification", which can be found on
>
> @url{http://infocenter.arm.com/help/topic/com.arm.doc.ecm0359818/ECM0359818_armv8m_security_extensions_reqs_on_dev_tools_1_0.pdf}.
> +
> +@item -mfdpic
> +@itemx -mno-fdpic
> +@opindex mfdpic
> +@opindex mno-fdpic
> +Select the FDPIC ABI, which uses function descriptors to represent
Maybe "64-bit function descriptors"? Just a suggestion, might not be useful.
OK with that change, thanks.
Richard
> +pointers to functions. When the compiler is configured for
> +@code{arm-*-uclinuxfdpiceabi} targets, this option is on by default
> +and implies @option{-fPIE} if none of the PIC/PIE-related options is
> +provided. On other targets, it only enables the FDPIC-specific code
> +generation features, and the user should explicitly provide the
> +PIC/PIE-related options as needed.
> +
> +The opposite @option{-mno-fdpic} option is useful (and required) to
> +build the Linux kernel using the same (@code{arm-*-uclinuxfdpiceabi})
> +toolchain as the one used to build the userland programs.
> +
> @end table
>
> @node AVR Options
