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Add moxie support. Release 3.0.12.

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This commit is contained in:
Anthony Green
2013-02-11 14:25:13 -05:00
parent 4ea22e54e3
commit f308faf1ea
15 changed files with 219 additions and 111 deletions
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src/moxie/ffi.c
+38 -26
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@@ -1,5 +1,5 @@
/* -----------------------------------------------------------------------
ffi.c - Copyright (C) 2012 Anthony Green
ffi.c - Copyright (C) 2012, 2013 Anthony Green
Moxie Foreign Function Interface
@@ -43,6 +43,12 @@ void *ffi_prep_args(char *stack, extended_cif *ecif)
p_argv = ecif->avalue;
argp = stack;
if (ecif->cif->rtype->type == FFI_TYPE_STRUCT)
{
*(void **) argp = ecif->rvalue;
argp += 4;
}
for (i = ecif->cif->nargs, p_arg = ecif->cif->arg_types;
(i != 0);
i--, p_arg++)
@@ -136,8 +142,7 @@ void ffi_call(ffi_cif *cif,
}
else
ecif.rvalue = rvalue;
switch (cif->abi)
{
case FFI_EABI:
@@ -154,19 +159,25 @@ void ffi_closure_eabi (unsigned arg1, unsigned arg2, unsigned arg3,
unsigned arg4, unsigned arg5, unsigned arg6)
{
/* This function is called by a trampoline. The trampoline stows a
pointer to the ffi_closure object in gr7. We must save this
pointer to the ffi_closure object in $r7. We must save this
pointer in a place that will persist while we do our work. */
register ffi_closure *creg __asm__ ("$r7");
register ffi_closure *creg __asm__ ("$r12");
ffi_closure *closure = creg;
/* Arguments that don't fit in registers are found on the stack
at a fixed offset above the current frame pointer. */
register char *frame_pointer __asm__ ("$fp");
char *stack_args = frame_pointer + 16;
/* Pointer to a struct return value. */
void *struct_rvalue = (void *) arg1;
/* 6 words reserved for register args + 3 words from jsr */
char *stack_args = frame_pointer + 9*4;
/* Lay the register arguments down in a continuous chunk of memory. */
unsigned register_args[6] =
{ arg1, arg2, arg3, arg4, arg5, arg6 };
char *register_args_ptr = (char *) register_args;
ffi_cif *cif = closure->cif;
ffi_type **arg_types = cif->arg_types;
@@ -174,6 +185,12 @@ void ffi_closure_eabi (unsigned arg1, unsigned arg2, unsigned arg3,
char *ptr = (char *) register_args;
int i;
/* preserve struct type return pointer passing */
if ((cif->rtype != NULL) && (cif->rtype->type == FFI_TYPE_STRUCT)) {
ptr += 4;
register_args_ptr = (char *)&register_args[1];
}
/* Find the address of each argument. */
for (i = 0; i < cif->nargs; i++)
{
@@ -190,6 +207,7 @@ void ffi_closure_eabi (unsigned arg1, unsigned arg2, unsigned arg3,
case FFI_TYPE_SINT32:
case FFI_TYPE_UINT32:
case FFI_TYPE_FLOAT:
case FFI_TYPE_POINTER:
avalue[i] = ptr;
break;
case FFI_TYPE_STRUCT:
@@ -205,30 +223,21 @@ void ffi_closure_eabi (unsigned arg1, unsigned arg2, unsigned arg3,
/* If we've handled more arguments than fit in registers,
start looking at the those passed on the stack. */
if (ptr == ((char *)register_args + (6*4)))
if (ptr == &register_args[6])
ptr = stack_args;
}
/* Invoke the closure. */
if (cif->rtype->type == FFI_TYPE_STRUCT)
if (cif->rtype && (cif->rtype->type == FFI_TYPE_STRUCT))
{
/* The caller allocates space for the return structure, and
passes a pointer to this space in gr3. Use this value directly
as the return value. */
register void *return_struct_ptr __asm__("$r0");
(closure->fun) (cif, return_struct_ptr, avalue, closure->user_data);
(closure->fun) (cif, struct_rvalue, avalue, closure->user_data);
}
else
{
/* Allocate space for the return value and call the function. */
long long rvalue;
(closure->fun) (cif, &rvalue, avalue, closure->user_data);
/* Functions return 4-byte or smaller results in gr8. 8-byte
values also use gr9. We fill the both, even for small return
values, just to avoid a branch. */ /*
asm ("ldi @(%0, #0), gr8" : : "r" (&rvalue));
asm ("ldi @(%0, #0), gr9" : : "r" (&((int *) &rvalue)[1])); */
asm ("mov $r12, %0\n ld.l $r0, ($r12)\n ldo.l $r1, 4($r12)" : : "r" (&rvalue));
}
}
@@ -239,18 +248,21 @@ ffi_prep_closure_loc (ffi_closure* closure,
void *user_data,
void *codeloc)
{
unsigned int *tramp = (unsigned int *) &closure->tramp[0];
unsigned short *tramp = (unsigned short *) &closure->tramp[0];
unsigned long fn = (long) ffi_closure_eabi;
unsigned long cls = (long) codeloc;
int i;
if (cif->abi != FFI_EABI)
return FFI_BAD_ABI;
fn = (unsigned long) ffi_closure_eabi;
tramp[0] = 0x8cfc0000 + (fn & 0xffff); /* setlos lo(fn), gr6 */
tramp[1] = 0x8efc0000 + (cls & 0xffff); /* setlos lo(cls), gr7 */
tramp[2] = 0x8cf80000 + (fn >> 16); /* sethi hi(fn), gr6 */
tramp[3] = 0x8ef80000 + (cls >> 16); /* sethi hi(cls), gr7 */
tramp[4] = 0x80300006; /* jmpl @(gr0, gr6) */
tramp[0] = 0x01e0; /* ldi.l $r7, .... */
tramp[1] = cls >> 16;
tramp[2] = cls & 0xffff;
tramp[3] = 0x1a00; /* jmpa .... */
tramp[4] = fn >> 16;
tramp[5] = fn & 0xffff;
closure->cif = cif;
closure->fun = fun;