ppc32 starts using the stack for integer arg passing when we run out
of integer arg passing registers. Similarly, we start using the stack
for floating point args when we run out of floating point registers.
The decision on where an integer arg goes does not depend on number of
floating point args, nor does the decision on where a floating point
arg goes depend on number of integer args. Alignment of stack args
also simply depends on number of stack args.
This patch untangles the horrible mess we had, with intarg_count being
wrongly used to count both integer args and stack words.
* src/powerpc/ffi_sysv.c (ffi_prep_cif_sysv_core): Count fprs,
gprs, and stack words separately.
(ffi_prep_args_SYSV): Similarly.
Add a new calling convention FFI_EFI64, alias FFI_WIN64, on all X86_64
platforms. This allows libffi compiled on a 64-bit x86 platform to call
EFI functions.
Compile in ffiw64.c and win64.S on all X86_64 platforms. When compiled
for a platform other than X86_WIN64, ffiw64.c suffixes its functions
with _efi64, to avoid conflict with the platform's actual
implementations of those functions.
Declare a local variable to match the type of the struct field assigned
to it, rather than adding unsigned to the type. Fixes a -Wpointer-sign
warning.
Non-WIN64 versions of the GNU assembler don't support the .seh_*
directives for structured exception handling, so wrap them in a macro
that compiles to nothing.
Handle the registers used for the non-Windows x86-64 calling convention
when on a non-Windows platform. Distinguish between cases that should
refer to the native argument registers (defined as arg0, arg1, arg2, and
arg3) and cases that should always refer to the Windows argument
registers.
* /bin/as requires .type fn,#function instead of @function.
* /bin/as doesn't support .macro/.endm. I'm using preprocessor macros
instead to implement E in src/sparc/v[89].S.
* Solaris/x86 /bin/as doesn't support .org, so I've just disabled the
uses in src/x86/{sysv, unix64}.S, as on Darwin.
* Solaris/x86 needs to use EH_FRAME_FLAGS so manually and compiler
generated .eh_frame sections match, otherwise libffi.so fails to link:
* Solaris/x86 /bin/as has different COMDAT syntax; I've disabled it for
the moment.
