Messages in this thread | | | Date | Mon, 23 Feb 2015 13:27:37 +0000 | From | Catalin Marinas <> | Subject | Re: some question about aarch32 for ARM64 |
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On Mon, Feb 23, 2015 at 12:28:57PM +0000, loody wrote: > I follow below instructions to compile a simple c file as aarch32 but in vain. > > https://gcc.gnu.org/onlinedocs/gcc-4.9.1/gcc/AArch64-Options.html#AArch64-Options
On the above link, there are no instructions on how to compile an AArch32 application with the AArch64 compiler. You need an AArch32 gcc (e.g. arm-linux-gnu-gcc, not aarch64-linux-gnu-gcc).
> I saw there are aarch32 support in arm64 kernel porting.
Yes, that's to support AArch32 binaries (ARMv8/v7/...).
> Would you mind to let us know how to get aarch32 ELF for running on > ARM64 processors?
Just use the right compiler.
> PS:Below is my compile error message: > #aarch64-linux-gnu-gcc -mabi=ilp32 test.c
-mabi=ilp32 is entirely different from an AArch32 compiler. The above still generates AArch64 but with the ILP32 ABI (sizeof int/long/pointer is 32-bit).
-- Catalin
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