diff options
Diffstat (limited to 'ext/ffi_c/libffi/src/moxie/ffi.c')
| -rw-r--r-- | ext/ffi_c/libffi/src/moxie/ffi.c | 82 |
1 files changed, 39 insertions, 43 deletions
diff --git a/ext/ffi_c/libffi/src/moxie/ffi.c b/ext/ffi_c/libffi/src/moxie/ffi.c index 54cbbb9..540a042 100644 --- a/ext/ffi_c/libffi/src/moxie/ffi.c +++ b/ext/ffi_c/libffi/src/moxie/ffi.c @@ -1,5 +1,5 @@ /* ----------------------------------------------------------------------- - ffi.c - Copyright (C) 2009 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++) @@ -56,17 +62,6 @@ void *ffi_prep_args(char *stack, extended_cif *ecif) z = sizeof(void*); *(void **) argp = *p_argv; } - /* if ((*p_arg)->type == FFI_TYPE_FLOAT) - { - if (count > 24) - { - // This is going on the stack. Turn it into a double. - *(double *) argp = (double) *(float*)(* p_argv); - z = sizeof(double); - } - else - *(void **) argp = *(void **)(* p_argv); - } */ else if (z < sizeof(int)) { z = sizeof(int); @@ -147,8 +142,7 @@ void ffi_call(ffi_cif *cif, } else ecif.rvalue = rvalue; - - + switch (cif->abi) { case FFI_EABI: @@ -165,19 +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 $r7. We must save this pointer in a place that will persist while we do our work. */ - register ffi_closure *creg __asm__ ("gr7"); + register ffi_closure *creg __asm__ ("$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; + register char *frame_pointer __asm__ ("$fp"); + + /* 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; @@ -185,6 +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 *)®ister_args[1]; + } + /* Find the address of each argument. */ for (i = 0; i < cif->nargs; i++) { @@ -201,6 +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: @@ -216,30 +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 == ®ister_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__("gr3"); - (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)); } } @@ -250,27 +248,25 @@ 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; closure->user_data = user_data; - /* Cache flushing. */ - for (i = 0; i < FFI_TRAMPOLINE_SIZE; i++) - __asm__ volatile ("dcf @(%0,%1)\n\tici @(%2,%1)" :: "r" (tramp), "r" (i), - "r" (codeloc)); - return FFI_OK; } |