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win64: Remove support from ffi.c

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This commit is contained in:
Richard Henderson
2014-10-23 23:57:06 -07:00
parent 99db4d42ac
commit ebd82769de
1 changed files with 8 additions and 204 deletions
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212
src/x86/ffi.c
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@@ -28,18 +28,12 @@
DEALINGS IN THE SOFTWARE.
----------------------------------------------------------------------- */
#if !defined(__x86_64__) || defined(_WIN64) || defined(__CYGWIN__)
#ifdef _WIN64
#include <windows.h>
#endif
#ifndef __x86_64__
#include <ffi.h>
#include <ffi_common.h>
#include <stdlib.h>
/* ffi_prep_args is called by the assembly routine once stack space
has been allocated for the function's arguments */
@@ -50,26 +44,17 @@ unsigned int ffi_prep_args(char *stack, extended_cif *ecif)
register void **p_argv;
register char *argp;
register ffi_type **p_arg;
#ifndef X86_WIN64
const int cabi = ecif->cif->abi;
const int dir = (cabi == FFI_PASCAL || cabi == FFI_REGISTER) ? -1 : +1;
unsigned int stack_args_count = 0;
void *p_stack_data[3];
char *argp2 = stack;
#else
#define dir 1
#endif
argp = stack;
if ((ecif->cif->flags == FFI_TYPE_STRUCT
|| ecif->cif->flags == FFI_TYPE_MS_STRUCT)
#ifdef X86_WIN64
&& ((ecif->cif->rtype->size & (1 | 2 | 4 | 8)) == 0)
#endif
)
|| ecif->cif->flags == FFI_TYPE_MS_STRUCT))
{
#ifndef X86_WIN64
/* For fastcall/thiscall/register this is first register-passed
argument. */
if (cabi == FFI_THISCALL || cabi == FFI_FASTCALL || cabi == FFI_REGISTER)
@@ -77,7 +62,6 @@ unsigned int ffi_prep_args(char *stack, extended_cif *ecif)
p_stack_data[stack_args_count] = argp;
++stack_args_count;
}
#endif
*(void **) argp = ecif->rvalue;
argp += sizeof(void*);
@@ -105,24 +89,6 @@ unsigned int ffi_prep_args(char *stack, extended_cif *ecif)
size_t z = (*p_arg)->size;
#ifdef X86_WIN64
if (z > FFI_SIZEOF_ARG
|| ((*p_arg)->type == FFI_TYPE_STRUCT
&& (z & (1 | 2 | 4 | 8)) == 0)
#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
|| ((*p_arg)->type == FFI_TYPE_LONGDOUBLE)
#endif
)
{
z = FFI_SIZEOF_ARG;
*(void **)argp = *p_argv;
}
else if ((*p_arg)->type == FFI_TYPE_FLOAT)
{
memcpy(argp, *p_argv, z);
}
else
#endif
if (z < FFI_SIZEOF_ARG)
{
z = FFI_SIZEOF_ARG;
@@ -165,7 +131,6 @@ unsigned int ffi_prep_args(char *stack, extended_cif *ecif)
memcpy(argp, *p_argv, z);
}
#ifndef X86_WIN64
/* For thiscall/fastcall/register convention register-passed arguments
are the first two none-floating-point arguments with a size
smaller or equal to sizeof (void*). */
@@ -188,18 +153,13 @@ unsigned int ffi_prep_args(char *stack, extended_cif *ecif)
p_stack_data[stack_args_count] = argp;
++stack_args_count;
}
#endif
#ifdef X86_WIN64
argp += (z + sizeof(void*) - 1) & ~(sizeof(void*) - 1);
#else
argp += z;
#endif
}
#ifndef X86_WIN64
/* We need to move the register-passed arguments for thiscall/fastcall/register
on top of stack, so that those can be moved to registers by call-handler. */
/* We need to move the register-passed arguments for thiscall,
fastcall, register on top of stack, so that those can be moved
to registers by call-handler. */
if (stack_args_count > 0)
{
if (dir < 0 && stack_args_count > 1)
@@ -225,7 +185,6 @@ unsigned int ffi_prep_args(char *stack, extended_cif *ecif)
}
return stack_args_count;
#endif
return 0;
}
@@ -243,25 +202,16 @@ ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
case FFI_TYPE_UINT16:
case FFI_TYPE_SINT8:
case FFI_TYPE_SINT16:
#ifdef X86_WIN64
case FFI_TYPE_UINT32:
case FFI_TYPE_SINT32:
#endif
case FFI_TYPE_SINT64:
case FFI_TYPE_FLOAT:
case FFI_TYPE_DOUBLE:
#ifndef X86_WIN64
#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
case FFI_TYPE_LONGDOUBLE:
#endif
#endif
cif->flags = (unsigned) cif->rtype->type;
break;
case FFI_TYPE_UINT64:
#ifdef X86_WIN64
case FFI_TYPE_POINTER:
#endif
cif->flags = FFI_TYPE_SINT64;
break;
@@ -277,11 +227,7 @@ ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
}
else if (cif->rtype->size == 4)
{
#ifdef X86_WIN64
cif->flags = FFI_TYPE_SMALL_STRUCT_4B;
#else
cif->flags = FFI_TYPE_INT; /* same as int type */
#endif
}
else if (cif->rtype->size == 8)
{
@@ -302,14 +248,7 @@ ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
break;
default:
#ifdef X86_WIN64
cif->flags = FFI_TYPE_SINT64;
break;
case FFI_TYPE_INT:
cif->flags = FFI_TYPE_SINT32;
#else
cif->flags = FFI_TYPE_INT;
#endif
break;
}
@@ -320,32 +259,19 @@ ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
cif->bytes += (unsigned)ALIGN((*ptr)->size, FFI_SIZEOF_ARG);
}
#ifdef X86_WIN64
/* ensure space for storing four registers */
cif->bytes += 4 * FFI_SIZEOF_ARG;
#endif
#ifndef X86_WIN32
#ifndef X86_WIN64
if (cif->abi == FFI_SYSV || cif->abi == FFI_UNIX64)
#endif
cif->bytes = (cif->bytes + 15) & ~0xF;
#endif
return FFI_OK;
}
#ifdef X86_WIN64
extern int
ffi_call_win64(unsigned int (*)(char *, extended_cif *), extended_cif *,
unsigned, unsigned, unsigned *, void (*fn)(void));
#else
extern void
ffi_call_win32(unsigned int (*)(char *, extended_cif *), extended_cif *,
unsigned, unsigned, unsigned, unsigned *, void (*fn)(void));
extern void ffi_call_SYSV(void (*)(char *, extended_cif *), extended_cif *,
unsigned, unsigned, unsigned *, void (*fn)(void));
#endif
void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
{
@@ -357,33 +283,18 @@ void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
/* If the return value is a struct and we don't have a return */
/* value address then we need to make one */
#ifdef X86_WIN64
if (rvalue == NULL
&& cif->flags == FFI_TYPE_STRUCT
&& ((cif->rtype->size & (1 | 2 | 4 | 8)) == 0))
{
ecif.rvalue = alloca((cif->rtype->size + 0xF) & ~0xF);
}
#else
if (rvalue == NULL
&& (cif->flags == FFI_TYPE_STRUCT
|| cif->flags == FFI_TYPE_MS_STRUCT))
{
ecif.rvalue = alloca(cif->rtype->size);
}
#endif
else
ecif.rvalue = rvalue;
switch (cif->abi)
{
#ifdef X86_WIN64
case FFI_WIN64:
ffi_call_win64(ffi_prep_args, &ecif, cif->bytes,
cif->flags, ecif.rvalue, fn);
break;
#else
#ifndef X86_WIN32
case FFI_SYSV:
ffi_call_SYSV(ffi_prep_args, &ecif, cif->bytes, cif->flags, ecif.rvalue,
@@ -401,7 +312,6 @@ void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
ffi_call_win32(ffi_prep_args, &ecif, cif->abi, cif->bytes, cif->flags,
ecif.rvalue, fn);
break;
#endif
default:
FFI_ASSERT(0);
break;
@@ -427,47 +337,13 @@ void FFI_HIDDEN ffi_closure_raw_SYSV (ffi_raw_closure *)
void FFI_HIDDEN ffi_closure_raw_THISCALL (ffi_raw_closure *)
__attribute__ ((regparm(1)));
#endif
#ifndef X86_WIN64
void FFI_HIDDEN ffi_closure_STDCALL (ffi_closure *);
void FFI_HIDDEN ffi_closure_THISCALL (ffi_closure *);
void FFI_HIDDEN ffi_closure_FASTCALL (ffi_closure *);
void FFI_HIDDEN ffi_closure_REGISTER (ffi_closure *);
#else
void FFI_HIDDEN ffi_closure_win64 (ffi_closure *);
#endif
/* This function is jumped to by the trampoline */
#ifdef X86_WIN64
void * FFI_HIDDEN
ffi_closure_win64_inner (ffi_closure *closure, void *args) {
ffi_cif *cif;
void **arg_area;
void *result;
void *resp = &result;
cif = closure->cif;
arg_area = (void**) alloca (cif->nargs * sizeof (void*));
/* this call will initialize ARG_AREA, such that each
* element in that array points to the corresponding
* value on the stack; and if the function returns
* a structure, it will change RESP to point to the
* structure return address. */
ffi_prep_incoming_args(args, &resp, arg_area, cif);
(closure->fun) (cif, resp, arg_area, closure->user_data);
/* The result is returned in rax. This does the right thing for
result types except for floats; we have to 'mov xmm0, rax' in the
caller to correct this.
TODO: structure sizes of 3 5 6 7 are returned by reference, too!!!
*/
return cif->rtype->size > sizeof(void *) ? resp : *(void **)resp;
}
#else
unsigned int FFI_HIDDEN __attribute__ ((regparm(1)))
ffi_closure_SYSV_inner (ffi_closure *closure, void **respp, void *args)
{
@@ -514,7 +390,6 @@ ffi_closure_WIN32_inner (ffi_closure *closure, void **respp, void *args)
return ret;
}
#endif /* !X86_WIN64 */
static unsigned int
ffi_prep_incoming_args(char *stack, void **rvalue, void **avalue,
@@ -524,7 +399,6 @@ ffi_prep_incoming_args(char *stack, void **rvalue, void **avalue,
register void **p_argv;
register char *argp;
register ffi_type **p_arg;
#ifndef X86_WIN64
const int cabi = cif->abi;
const int dir = (cabi == FFI_PASCAL || cabi == FFI_REGISTER) ? -1 : +1;
const unsigned int max_stack_count = (cabi == FFI_THISCALL) ? 1
@@ -533,37 +407,25 @@ ffi_prep_incoming_args(char *stack, void **rvalue, void **avalue,
: 0;
unsigned int passed_regs = 0;
void *p_stack_data[3] = { stack - 1 };
#else
#define dir 1
#endif
argp = stack;
#ifndef X86_WIN64
argp += max_stack_count * FFI_SIZEOF_ARG;
#endif
if ((cif->flags == FFI_TYPE_STRUCT
|| cif->flags == FFI_TYPE_MS_STRUCT)
#ifdef X86_WIN64
&& ((cif->rtype->size & (1 | 2 | 4 | 8)) == 0)
#endif
)
|| cif->flags == FFI_TYPE_MS_STRUCT))
{
#ifndef X86_WIN64
if (passed_regs < max_stack_count)
{
*rvalue = *(void**) (stack + (passed_regs*FFI_SIZEOF_ARG));
++passed_regs;
}
else
#endif
{
*rvalue = *(void **) argp;
argp += sizeof(void *);
}
}
#ifndef X86_WIN64
/* Do register arguments first */
for (i = 0, p_arg = cif->arg_types;
i < cif->nargs && passed_regs < max_stack_count;
@@ -581,7 +443,6 @@ ffi_prep_incoming_args(char *stack, void **rvalue, void **avalue,
avalue[i] = stack + (passed_regs*FFI_SIZEOF_ARG);
++passed_regs;
}
#endif
p_arg = cif->arg_types;
p_argv = avalue;
@@ -605,20 +466,6 @@ ffi_prep_incoming_args(char *stack, void **rvalue, void **avalue,
size_t z = (*p_arg)->size;
#ifdef X86_WIN64
if (z > FFI_SIZEOF_ARG
|| ((*p_arg)->type == FFI_TYPE_STRUCT
&& (z & (1 | 2 | 4 | 8)) == 0)
#if FFI_TYPE_DOUBLE != FFI_TYPE_LONGDOUBLE
|| ((*p_arg)->type == FFI_TYPE_LONGDOUBLE)
#endif
)
{
z = FFI_SIZEOF_ARG;
*p_argv = *(void **)argp;
}
else
#else
if (passed_regs > 0
&& z <= FFI_SIZEOF_ARG
&& (p_argv == p_stack_data[0]
@@ -629,40 +476,17 @@ ffi_prep_incoming_args(char *stack, void **rvalue, void **avalue,
continue;
}
else
#endif
{
/* because we're little endian, this is what it turns into. */
*p_argv = (void*) argp;
}
#ifdef X86_WIN64
argp += (z + sizeof(void*) - 1) & ~(sizeof(void*) - 1);
#else
argp += z;
#endif
}
return (size_t)argp - (size_t)stack;
}
#define FFI_INIT_TRAMPOLINE_WIN64(TRAMP,FUN,CTX,MASK) \
{ unsigned char *__tramp = (unsigned char*)(TRAMP); \
void* __fun = (void*)(FUN); \
void* __ctx = (void*)(CTX); \
*(unsigned char*) &__tramp[0] = 0x41; \
*(unsigned char*) &__tramp[1] = 0xbb; \
*(unsigned int*) &__tramp[2] = MASK; /* mov $mask, %r11 */ \
*(unsigned char*) &__tramp[6] = 0x48; \
*(unsigned char*) &__tramp[7] = 0xb8; \
*(void**) &__tramp[8] = __ctx; /* mov __ctx, %rax */ \
*(unsigned char *) &__tramp[16] = 0x49; \
*(unsigned char *) &__tramp[17] = 0xba; \
*(void**) &__tramp[18] = __fun; /* mov __fun, %r10 */ \
*(unsigned char *) &__tramp[26] = 0x41; \
*(unsigned char *) &__tramp[27] = 0xff; \
*(unsigned char *) &__tramp[28] = 0xe2; /* jmp %r10 */ \
}
/* How to make a trampoline. Derived from gcc/config/i386/i386.c. */
#define FFI_INIT_TRAMPOLINE(TRAMP,FUN,CTX) \
@@ -723,18 +547,6 @@ ffi_prep_closure_loc (ffi_closure* closure,
void *user_data,
void *codeloc)
{
#ifdef X86_WIN64
#define ISFLOAT(IDX) (cif->arg_types[IDX]->type == FFI_TYPE_FLOAT || cif->arg_types[IDX]->type == FFI_TYPE_DOUBLE)
#define FLAG(IDX) (cif->nargs>(IDX)&&ISFLOAT(IDX)?(1<<(IDX)):0)
if (cif->abi == FFI_WIN64)
{
int mask = FLAG(0)|FLAG(1)|FLAG(2)|FLAG(3);
FFI_INIT_TRAMPOLINE_WIN64 (&closure->tramp[0],
&ffi_closure_win64,
codeloc, mask);
/* make sure we can execute here */
}
#else
if (cif->abi == FFI_SYSV)
{
FFI_INIT_TRAMPOLINE (&closure->tramp[0],
@@ -773,7 +585,6 @@ ffi_prep_closure_loc (ffi_closure* closure,
(void*)codeloc);
}
#endif /* X86_WIN32 */
#endif /* !X86_WIN64 */
else
{
return FFI_BAD_ABI;
@@ -843,7 +654,6 @@ ffi_prep_args_raw(char *stack, extended_cif *ecif)
const ffi_cif *cif = ecif->cif;
unsigned int i, passed_regs = 0;
#ifndef X86_WIN64
const unsigned int abi = cif->abi;
const unsigned int max_regs = (abi == FFI_THISCALL) ? 1
: (abi == FFI_FASTCALL) ? 2
@@ -865,7 +675,6 @@ ffi_prep_args_raw(char *stack, extended_cif *ecif)
++passed_regs;
}
#endif
memcpy (stack, ecif->avalue, cif->bytes);
return passed_regs;
@@ -909,7 +718,6 @@ ffi_raw_call(ffi_cif *cif, void (*fn)(void), void *rvalue, ffi_raw *fake_avalue)
case FFI_SYSV:
case FFI_MS_CDECL:
#endif
#ifndef X86_WIN64
case FFI_STDCALL:
case FFI_THISCALL:
case FFI_FASTCALL:
@@ -918,14 +726,10 @@ ffi_raw_call(ffi_cif *cif, void (*fn)(void), void *rvalue, ffi_raw *fake_avalue)
ffi_call_win32(ffi_prep_args_raw, &ecif, cif->abi, cif->bytes, cif->flags,
ecif.rvalue, fn);
break;
#endif
default:
FFI_ASSERT(0);
break;
}
}
#endif
#endif /* !__x86_64__ || X86_WIN64 */
#endif /* !FFI_NO_RAW_API */
#endif /* !__x86_64__ */