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Support the WIN64/EFI64 calling convention on all X86_64 platforms

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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.
This commit is contained in:
Josh Triplett
2015-07-26 17:18:16 -07:00
parent 6de51f3e04
commit 1f6b5a91f4
4 changed files with 44 additions and 8 deletions
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src/x86/ffi64.c
+32
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@@ -388,6 +388,9 @@ examine_argument (ffi_type *type, enum x86_64_reg_class classes[MAX_CLASSES],
/* Perform machine dependent cif processing. */
extern ffi_status
ffi_prep_cif_machdep_efi64(ffi_cif *cif);
ffi_status
ffi_prep_cif_machdep (ffi_cif *cif)
{
@@ -396,6 +399,8 @@ ffi_prep_cif_machdep (ffi_cif *cif)
size_t bytes, n, rtype_size;
ffi_type *rtype;
if (cif->abi == FFI_EFI64)
return ffi_prep_cif_machdep_efi64(cif);
if (cif->abi != FFI_UNIX64)
return FFI_BAD_ABI;
@@ -657,22 +662,41 @@ ffi_call_int (ffi_cif *cif, void (*fn)(void), void *rvalue,
flags, rvalue, fn);
}
extern void
ffi_call_efi64(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue);
void
ffi_call (ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
{
if (cif->abi == FFI_EFI64)
return ffi_call_efi64(cif, fn, rvalue, avalue);
ffi_call_int (cif, fn, rvalue, avalue, NULL);
}
extern void
ffi_call_go_efi64(ffi_cif *cif, void (*fn)(void), void *rvalue,
void **avalue, void *closure);
void
ffi_call_go (ffi_cif *cif, void (*fn)(void), void *rvalue,
void **avalue, void *closure)
{
if (cif->abi == FFI_EFI64)
ffi_call_go_efi64(cif, fn, rvalue, avalue, closure);
ffi_call_int (cif, fn, rvalue, avalue, closure);
}
extern void ffi_closure_unix64(void) FFI_HIDDEN;
extern void ffi_closure_unix64_sse(void) FFI_HIDDEN;
extern ffi_status
ffi_prep_closure_loc_efi64(ffi_closure* closure,
ffi_cif* cif,
void (*fun)(ffi_cif*, void*, void**, void*),
void *user_data,
void *codeloc);
ffi_status
ffi_prep_closure_loc (ffi_closure* closure,
ffi_cif* cif,
@@ -691,6 +715,8 @@ ffi_prep_closure_loc (ffi_closure* closure,
void (*dest)(void);
char *tramp = closure->tramp;
if (cif->abi == FFI_EFI64)
return ffi_prep_closure_loc_efi64(closure, cif, fun, user_data, codeloc);
if (cif->abi != FFI_UNIX64)
return FFI_BAD_ABI;
@@ -805,10 +831,16 @@ ffi_closure_unix64_inner(ffi_cif *cif,
extern void ffi_go_closure_unix64(void) FFI_HIDDEN;
extern void ffi_go_closure_unix64_sse(void) FFI_HIDDEN;
extern ffi_status
ffi_prep_go_closure_efi64(ffi_go_closure* closure, ffi_cif* cif,
void (*fun)(ffi_cif*, void*, void**, void*));
ffi_status
ffi_prep_go_closure (ffi_go_closure* closure, ffi_cif* cif,
void (*fun)(ffi_cif*, void*, void**, void*))
{
if (cif->abi == FFI_EFI64)
return ffi_prep_go_closure_efi64(closure, cif, fun);
if (cif->abi != FFI_UNIX64)
return FFI_BAD_ABI;