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ffi.h.in: Enable FFI_CLOSURES for x86_64.

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2003-01-28  Andrew Haley  <aph@redhat.com>

        * include/ffi.h.in: Enable FFI_CLOSURES for x86_64.
        * src/x86/ffi64.c (ffi_prep_closure): New.
        (ffi_closure_UNIX64_inner): New.
        * src/x86/unix64.S (ffi_closure_UNIX64): New.

From-SVN: r61978
This commit is contained in:
Andrew Haley 2003-01-28 15:54:28 +00:00 committed by Andrew Haley
parent 447ff38fba
commit fd2e49b2ac
4 changed files with 240 additions and 1 deletions
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7
libffi/ChangeLog
View File

@ -1,3 +1,10 @@
2003-01-28 Andrew Haley <aph@redhat.com>
* include/ffi.h.in: Enable FFI_CLOSURES for x86_64.
* src/x86/ffi64.c (ffi_prep_closure): New.
(ffi_closure_UNIX64_inner): New.
* src/x86/unix64.S (ffi_closure_UNIX64): New.
2003-01-27 Alexandre Oliva <aoliva@redhat.com>
* configure.in (toolexecdir, toolexeclibdir): Set and AC_SUBST.

6
libffi/include/ffi.h.in
View File

@ -471,6 +471,12 @@ struct ffi_ia64_trampoline_struct {
#define FFI_TRAMPOLINE_SIZE 16
#define FFI_NATIVE_RAW_API 0
#elif defined(__x86_64__)
#define FFI_CLOSURES 1
#define FFI_TRAMPOLINE_SIZE 24
#define FFI_NATIVE_RAW_API 0
#else
#define FFI_CLOSURES 0

132
libffi/src/x86/ffi64.c
View File

@ -27,6 +27,7 @@
#include <ffi_common.h>
#include <stdlib.h>
#include <stdarg.h>
/* ffi_prep_args is called by the assembly routine once stack space
has been allocated for the function's arguments */
@ -571,4 +572,135 @@ void ffi_call(/*@dependent@*/ ffi_cif *cif,
}
}
extern void ffi_closure_UNIX64(void);
ffi_status
ffi_prep_closure (ffi_closure* closure,
ffi_cif* cif,
void (*fun)(ffi_cif*, void*, void**, void*),
void *user_data)
{
volatile unsigned short *tramp;
/* FFI_ASSERT (cif->abi == FFI_OSF); */
tramp = (volatile unsigned short *) &closure->tramp[0];
tramp[0] = 0xbb49; /* mov <code>, %r11 */
tramp[5] = 0xba49; /* mov <data>, %r10 */
tramp[10] = 0xff49; /* jmp *%r11 */
tramp[11] = 0x00e3;
*(void * volatile *) &tramp[1] = ffi_closure_UNIX64;
*(void * volatile *) &tramp[6] = closure;
closure->cif = cif;
closure->fun = fun;
closure->user_data = user_data;
return FFI_OK;
}
int
ffi_closure_UNIX64_inner(ffi_closure *closure, va_list l, void *rp)
{
ffi_cif *cif;
void **avalue;
ffi_type **arg_types;
long i, avn, argn;
cif = closure->cif;
avalue = alloca(cif->nargs * sizeof(void *));
argn = 0;
i = 0;
avn = cif->nargs;
arg_types = cif->arg_types;
/* Grab the addresses of the arguments from the stack frame. */
while (i < avn)
{
switch (arg_types[i]->type)
{
case FFI_TYPE_SINT8:
case FFI_TYPE_UINT8:
case FFI_TYPE_SINT16:
case FFI_TYPE_UINT16:
case FFI_TYPE_SINT32:
case FFI_TYPE_UINT32:
case FFI_TYPE_SINT64:
case FFI_TYPE_UINT64:
case FFI_TYPE_POINTER:
{
if (l->gp_offset > 48-8)
{
avalue[i] = l->overflow_arg_area;
l->overflow_arg_area = (char *)l->overflow_arg_area + 8;
}
else
{
avalue[i] = (char *)l->reg_save_area + l->gp_offset;
l->gp_offset += 8;
}
}
break;
case FFI_TYPE_STRUCT:
/* FIXME */
FFI_ASSERT(0);
break;
case FFI_TYPE_DOUBLE:
{
if (l->fp_offset > 176-16)
{
avalue[i] = l->overflow_arg_area;
l->overflow_arg_area = (char *)l->overflow_arg_area + 8;
}
else
{
avalue[i] = (char *)l->reg_save_area + l->fp_offset;
l->fp_offset += 16;
}
}
#if DEBUG_FFI
fprintf (stderr, "double arg %d = %g\n", i, *(double *)avalue[i]);
#endif
break;
case FFI_TYPE_FLOAT:
{
if (l->fp_offset > 176-16)
{
avalue[i] = l->overflow_arg_area;
l->overflow_arg_area = (char *)l->overflow_arg_area + 8;
}
else
{
avalue[i] = (char *)l->reg_save_area + l->fp_offset;
l->fp_offset += 16;
}
}
#if DEBUG_FFI
fprintf (stderr, "float arg %d = %g\n", i, *(float *)avalue[i]);
#endif
break;
default:
FFI_ASSERT(0);
}
argn += ALIGN(arg_types[i]->size, SIZEOF_ARG) / SIZEOF_ARG;
i++;
}
/* Invoke the closure. */
(closure->fun) (cif, rp, avalue, closure->user_data);
/* FIXME: Structs not supported. */
FFI_ASSERT(cif->rtype->type != FFI_TYPE_STRUCT);
/* Tell ffi_closure_UNIX64 how to perform return type promotions. */
return cif->rtype->type;
}
#endif /* ifndef __x86_64__ */

96
libffi/src/x86/unix64.S
View File

@ -162,7 +162,81 @@ sse2floatfloat:
movaps (%rdi), %xmm0
movq %xmm0, (%rsi)
ret
.align 2
.globl ffi_closure_UNIX64
.type ffi_closure_UNIX64,@function
ffi_closure_UNIX64:
.LFB2:
pushq %rbp
.LCFI10:
movq %rsp, %rbp
.LCFI11:
subq $240, %rsp
.LCFI12:
movq %rdi, -176(%rbp)
movq %rsi, -168(%rbp)
movq %rdx, -160(%rbp)
movq %rcx, -152(%rbp)
movq %r8, -144(%rbp)
movq %r9, -136(%rbp)
/* FIXME: We can avoid all this stashing of XMM registers by
(in ffi_prep_closure) computing the number of
floating-point args and moving it into %rax before calling
this function. Once this is done, uncomment the next few
lines and only the essential XMM registers will be written
to memory. This is a significant saving. */
/* movzbl %al, %eax */
/* movq %rax, %rdx */
/* leaq 0(,%rdx,4), %rax */
/* leaq 2f(%rip), %rdx */
/* subq %rax, %rdx */
leaq -1(%rbp), %rax
/* jmp *%rdx */
movaps %xmm7, -15(%rax)
movaps %xmm6, -31(%rax)
movaps %xmm5, -47(%rax)
movaps %xmm4, -63(%rax)
movaps %xmm3, -79(%rax)
movaps %xmm2, -95(%rax)
movaps %xmm1, -111(%rax)
movaps %xmm0, -127(%rax)
2:
movl %edi, -180(%rbp)
movl $0, -224(%rbp)
movl $48, -220(%rbp)
leaq 16(%rbp), %rax
movq %rax, -216(%rbp)
leaq -176(%rbp), %rdx
movq %rdx, -208(%rbp)
leaq -224(%rbp), %rsi
movq %r10, %rdi
movq %rsp, %rdx
call ffi_closure_UNIX64_inner@PLT
cmpl $FFI_TYPE_FLOAT, %eax
je 1f
cmpl $FFI_TYPE_DOUBLE, %eax
je 2f
cmpl $FFI_TYPE_LONGDOUBLE, %eax
je 3f
cmpl $FFI_TYPE_STRUCT, %eax
je 4f
popq %rax
leave
ret
1:
2:
3:
movaps -240(%rbp), %xmm0
leave
ret
4:
leave
ret
.LFE2:
.section .eh_frame,"a",@progbits
.Lframe0:
.long .LECIE1-.LSCIE1
@ -204,5 +278,25 @@ sse2floatfloat:
.uleb128 0x6
.align 8
.LEFDE1:
.LSFDE3:
.long .LEFDE3-.LASFDE3 # FDE Length
.LASFDE3:
.long .LASFDE3-.Lframe0 # FDE CIE offset
.long .LFB2-. # FDE initial location
.long .LFE2-.LFB2 # FDE address range
.uleb128 0x0 # Augmentation size
.byte 0x4 # DW_CFA_advance_loc4
.long .LCFI10-.LFB2
.byte 0xe # DW_CFA_def_cfa_offset
.uleb128 0x10
.byte 0x86 # DW_CFA_offset, column 0x6
.uleb128 0x2
.byte 0x4 # DW_CFA_advance_loc4
.long .LCFI11-.LCFI10
.byte 0xd # DW_CFA_def_cfa_register
.uleb128 0x6
.align 8
.LEFDE3:
#endif /* __x86_64__ */