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-rw-r--r--libffi/src/avr32/ffi.c421
-rw-r--r--libffi/src/avr32/ffitarget.h50
-rw-r--r--libffi/src/avr32/sysv.S208
3 files changed, 679 insertions, 0 deletions
diff --git a/libffi/src/avr32/ffi.c b/libffi/src/avr32/ffi.c
new file mode 100644
index 000000000..39fba2b03
--- /dev/null
+++ b/libffi/src/avr32/ffi.c
@@ -0,0 +1,421 @@
+/* -----------------------------------------------------------------------
+ ffi.c - Copyright (c) 2009 Bradley Smith <brad@brad-smith.co.uk>
+
+ AVR32 Foreign Function Interface
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ ``Software''), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be included
+ in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ DEALINGS IN THE SOFTWARE.
+ ----------------------------------------------------------------------- */
+
+#include <ffi.h>
+#include <ffi_common.h>
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <unistd.h>
+#include <asm/unistd.h>
+
+/* #define DEBUG */
+
+extern void ffi_call_SYSV(void (*)(char *, extended_cif *), extended_cif *,
+ unsigned int, unsigned int, unsigned int*, unsigned int,
+ void (*fn)(void));
+extern void ffi_closure_SYSV (ffi_closure *);
+
+unsigned int pass_struct_on_stack(ffi_type *type)
+{
+ if(type->type != FFI_TYPE_STRUCT)
+ return 0;
+
+ if(type->alignment < type->size &&
+ !(type->size == 4 || type->size == 8) &&
+ !(type->size == 8 && type->alignment >= 4))
+ return 1;
+
+ if(type->size == 3 || type->size == 5 || type->size == 6 ||
+ type->size == 7)
+ return 1;
+
+ return 0;
+}
+
+/* ffi_prep_args is called by the assembly routine once stack space
+ * has been allocated for the function's arguments
+ *
+ * This is annoyingly complex since we need to keep track of used
+ * registers.
+ */
+
+void ffi_prep_args(char *stack, extended_cif *ecif)
+{
+ unsigned int i;
+ void **p_argv;
+ ffi_type **p_arg;
+ char *reg_base = stack;
+ char *stack_base = stack + 20;
+ unsigned int stack_offset = 0;
+ unsigned int reg_mask = 0;
+
+ p_argv = ecif->avalue;
+
+ /* If cif->flags is struct then we know it's not passed in registers */
+ if(ecif->cif->flags == FFI_TYPE_STRUCT)
+ {
+ *(void**)reg_base = ecif->rvalue;
+ reg_mask |= 1;
+ }
+
+ for(i = 0, p_arg = ecif->cif->arg_types; i < ecif->cif->nargs;
+ i++, p_arg++)
+ {
+ size_t z = (*p_arg)->size;
+ int alignment = (*p_arg)->alignment;
+ int type = (*p_arg)->type;
+ char *addr = 0;
+
+ if(z % 4 != 0)
+ z += (4 - z % 4);
+
+ if(reg_mask != 0x1f)
+ {
+ if(pass_struct_on_stack(*p_arg))
+ {
+ addr = stack_base + stack_offset;
+ stack_offset += z;
+ }
+ else if(z == sizeof(int))
+ {
+ char index = 0;
+
+ while((reg_mask >> index) & 1)
+ index++;
+
+ addr = reg_base + (index * 4);
+ reg_mask |= (1 << index);
+ }
+ else if(z == 2 * sizeof(int))
+ {
+ if(!((reg_mask >> 1) & 1))
+ {
+ addr = reg_base + 4;
+ reg_mask |= (3 << 1);
+ }
+ else if(!((reg_mask >> 3) & 1))
+ {
+ addr = reg_base + 12;
+ reg_mask |= (3 << 3);
+ }
+ }
+ }
+
+ if(!addr)
+ {
+ addr = stack_base + stack_offset;
+ stack_offset += z;
+ }
+
+ if(type == FFI_TYPE_STRUCT && (*p_arg)->elements[1] == NULL)
+ type = (*p_arg)->elements[0]->type;
+
+ switch(type)
+ {
+ case FFI_TYPE_UINT8:
+ *(unsigned int *)addr = (unsigned int)*(UINT8 *)(*p_argv);
+ break;
+ case FFI_TYPE_SINT8:
+ *(signed int *)addr = (signed int)*(SINT8 *)(*p_argv);
+ break;
+ case FFI_TYPE_UINT16:
+ *(unsigned int *)addr = (unsigned int)*(UINT16 *)(*p_argv);
+ break;
+ case FFI_TYPE_SINT16:
+ *(signed int *)addr = (signed int)*(SINT16 *)(*p_argv);
+ break;
+ default:
+ memcpy(addr, *p_argv, z);
+ }
+
+ p_argv++;
+ }
+
+#ifdef DEBUG
+ /* Debugging */
+ for(i = 0; i < 5; i++)
+ {
+ if((reg_mask & (1 << i)) == 0)
+ printf("r%d: (unused)\n", 12 - i);
+ else
+ printf("r%d: 0x%08x\n", 12 - i, ((unsigned int*)reg_base)[i]);
+ }
+
+ for(i = 0; i < stack_offset / 4; i++)
+ {
+ printf("sp+%d: 0x%08x\n", i*4, ((unsigned int*)stack_base)[i]);
+ }
+#endif
+}
+
+/* Perform machine dependent cif processing */
+ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
+{
+ /* Round the stack up to a multiple of 8 bytes. This isn't needed
+ * everywhere, but it is on some platforms, and it doesn't harm
+ * anything when it isn't needed. */
+ cif->bytes = (cif->bytes + 7) & ~7;
+
+ /* Flag to indicate that he return value is in fact a struct */
+ cif->rstruct_flag = 0;
+
+ /* Set the return type flag */
+ switch(cif->rtype->type)
+ {
+ case FFI_TYPE_SINT8:
+ case FFI_TYPE_UINT8:
+ cif->flags = (unsigned)FFI_TYPE_UINT8;
+ break;
+ case FFI_TYPE_SINT16:
+ case FFI_TYPE_UINT16:
+ cif->flags = (unsigned)FFI_TYPE_UINT16;
+ break;
+ case FFI_TYPE_FLOAT:
+ case FFI_TYPE_SINT32:
+ case FFI_TYPE_UINT32:
+ case FFI_TYPE_POINTER:
+ cif->flags = (unsigned)FFI_TYPE_UINT32;
+ break;
+ case FFI_TYPE_DOUBLE:
+ case FFI_TYPE_SINT64:
+ case FFI_TYPE_UINT64:
+ cif->flags = (unsigned)FFI_TYPE_UINT64;
+ break;
+ case FFI_TYPE_STRUCT:
+ cif->rstruct_flag = 1;
+ if(!pass_struct_on_stack(cif->rtype))
+ {
+ if(cif->rtype->size <= 1)
+ cif->flags = (unsigned)FFI_TYPE_UINT8;
+ else if(cif->rtype->size <= 2)
+ cif->flags = (unsigned)FFI_TYPE_UINT16;
+ else if(cif->rtype->size <= 4)
+ cif->flags = (unsigned)FFI_TYPE_UINT32;
+ else if(cif->rtype->size <= 8)
+ cif->flags = (unsigned)FFI_TYPE_UINT64;
+ else
+ cif->flags = (unsigned)cif->rtype->type;
+ }
+ else
+ cif->flags = (unsigned)cif->rtype->type;
+ break;
+ default:
+ cif->flags = (unsigned)cif->rtype->type;
+ break;
+ }
+
+ return FFI_OK;
+}
+
+void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
+{
+ extended_cif ecif;
+
+ unsigned int size = 0, i = 0;
+ ffi_type **p_arg;
+
+ ecif.cif = cif;
+ ecif.avalue = avalue;
+
+ for(i = 0, p_arg = cif->arg_types; i < cif->nargs; i++, p_arg++)
+ size += (*p_arg)->size + (4 - (*p_arg)->size % 4);
+
+ /* If the return value is a struct and we don't have a return value
+ * address then we need to make one */
+
+ /* If cif->flags is struct then it's not suitable for registers */
+ if((rvalue == NULL) && (cif->flags == FFI_TYPE_STRUCT))
+ ecif.rvalue = alloca(cif->rtype->size);
+ else
+ ecif.rvalue = rvalue;
+
+ switch(cif->abi)
+ {
+ case FFI_SYSV:
+ ffi_call_SYSV(ffi_prep_args, &ecif, size, cif->flags,
+ ecif.rvalue, cif->rstruct_flag, fn);
+ break;
+ default:
+ FFI_ASSERT(0);
+ break;
+ }
+}
+
+static void ffi_prep_incoming_args_SYSV(char *stack, void **rvalue,
+ void **avalue, ffi_cif *cif)
+{
+ register unsigned int i, reg_mask = 0;
+ register void **p_argv;
+ register ffi_type **p_arg;
+ register char *reg_base = stack;
+ register char *stack_base = stack + 20;
+ register unsigned int stack_offset = 0;
+
+#ifdef DEBUG
+ /* Debugging */
+ for(i = 0; i < cif->nargs + 7; i++)
+ {
+ printf("sp+%d: 0x%08x\n", i*4, ((unsigned int*)stack)[i]);
+ }
+#endif
+
+ /* If cif->flags is struct then we know it's not passed in registers */
+ if(cif->flags == FFI_TYPE_STRUCT)
+ {
+ *rvalue = *(void **)reg_base;
+ reg_mask |= 1;
+ }
+
+ p_argv = avalue;
+
+ for(i = 0, p_arg = cif->arg_types; i < cif->nargs; i++, p_arg++)
+ {
+ size_t z = (*p_arg)->size;
+ int alignment = (*p_arg)->alignment;
+
+ *p_argv = 0;
+
+ if(z % 4 != 0)
+ z += (4 - z % 4);
+
+ if(reg_mask != 0x1f)
+ {
+ if(pass_struct_on_stack(*p_arg))
+ {
+ *p_argv = (void*)stack_base + stack_offset;
+ stack_offset += z;
+ }
+ else if(z <= sizeof(int))
+ {
+ char index = 0;
+
+ while((reg_mask >> index) & 1)
+ index++;
+
+ *p_argv = (void*)reg_base + (index * 4);
+ reg_mask |= (1 << index);
+ }
+ else if(z == 2 * sizeof(int))
+ {
+ if(!((reg_mask >> 1) & 1))
+ {
+ *p_argv = (void*)reg_base + 4;
+ reg_mask |= (3 << 1);
+ }
+ else if(!((reg_mask >> 3) & 1))
+ {
+ *p_argv = (void*)reg_base + 12;
+ reg_mask |= (3 << 3);
+ }
+ }
+ }
+
+ if(!*p_argv)
+ {
+ *p_argv = (void*)stack_base + stack_offset;
+ stack_offset += z;
+ }
+
+ if((*p_arg)->type != FFI_TYPE_STRUCT ||
+ (*p_arg)->elements[1] == NULL)
+ {
+ if(alignment == 1)
+ **(unsigned int**)p_argv <<= 24;
+ else if(alignment == 2)
+ **(unsigned int**)p_argv <<= 16;
+ }
+
+ p_argv++;
+ }
+
+#ifdef DEBUG
+ /* Debugging */
+ for(i = 0; i < cif->nargs; i++)
+ {
+ printf("sp+%d: 0x%08x\n", i*4, *(((unsigned int**)avalue)[i]));
+ }
+#endif
+}
+
+/* This function is jumped to by the trampoline */
+
+unsigned int ffi_closure_SYSV_inner(ffi_closure *closure, void **respp,
+ void *args)
+{
+ ffi_cif *cif;
+ void **arg_area;
+ unsigned int i, size = 0;
+ ffi_type **p_arg;
+
+ cif = closure->cif;
+
+ for(i = 0, p_arg = cif->arg_types; i < cif->nargs; i++, p_arg++)
+ size += (*p_arg)->size + (4 - (*p_arg)->size % 4);
+
+ arg_area = (void **)alloca(size);
+
+ /* 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 re-set RESP to point to the
+ * structure return address. */
+
+ ffi_prep_incoming_args_SYSV(args, respp, arg_area, cif);
+
+ (closure->fun)(cif, *respp, arg_area, closure->user_data);
+
+ return cif->flags;
+}
+
+ffi_status ffi_prep_closure_loc(ffi_closure* closure, ffi_cif* cif,
+ void (*fun)(ffi_cif*, void*, void**, void*), void *user_data,
+ void *codeloc)
+{
+ FFI_ASSERT(cif->abi == FFI_SYSV);
+
+ unsigned char *__tramp = (unsigned char*)(&closure->tramp[0]);
+ unsigned int __fun = (unsigned int)(&ffi_closure_SYSV);
+ unsigned int __ctx = (unsigned int)(codeloc);
+ unsigned int __rstruct_flag = (unsigned int)(cif->rstruct_flag);
+ unsigned int __inner = (unsigned int)(&ffi_closure_SYSV_inner);
+ *(unsigned int*) &__tramp[0] = 0xebcd1f00; /* pushm r8-r12 */
+ *(unsigned int*) &__tramp[4] = 0xfefc0010; /* ld.w r12, pc[16] */
+ *(unsigned int*) &__tramp[8] = 0xfefb0010; /* ld.w r11, pc[16] */
+ *(unsigned int*) &__tramp[12] = 0xfefa0010; /* ld.w r10, pc[16] */
+ *(unsigned int*) &__tramp[16] = 0xfeff0010; /* ld.w pc, pc[16] */
+ *(unsigned int*) &__tramp[20] = __ctx;
+ *(unsigned int*) &__tramp[24] = __rstruct_flag;
+ *(unsigned int*) &__tramp[28] = __inner;
+ *(unsigned int*) &__tramp[32] = __fun;
+ syscall(__NR_cacheflush, 0, (&__tramp[0]), 36);
+
+ closure->cif = cif;
+ closure->user_data = user_data;
+ closure->fun = fun;
+
+ return FFI_OK;
+}
+
diff --git a/libffi/src/avr32/ffitarget.h b/libffi/src/avr32/ffitarget.h
new file mode 100644
index 000000000..1c799b1de
--- /dev/null
+++ b/libffi/src/avr32/ffitarget.h
@@ -0,0 +1,50 @@
+/* -----------------------------------------------------------------*-C-*-
+ ffitarget.h - Copyright (c) 2009 Bradley Smith <brad@brad-smith.co.uk>
+ Target configuration macros for AVR32.
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ ``Software''), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be included
+ in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
+ NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
+ HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
+ WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+ OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ DEALINGS IN THE SOFTWARE.
+
+ ----------------------------------------------------------------------- */
+
+#ifndef LIBFFI_TARGET_H
+#define LIBFFI_TARGET_H
+
+#ifndef LIBFFI_ASM
+typedef unsigned long ffi_arg;
+typedef signed long ffi_sarg;
+
+typedef enum ffi_abi {
+ FFI_FIRST_ABI = 0,
+ FFI_SYSV,
+ FFI_DEFAULT_ABI = FFI_SYSV,
+ FFI_LAST_ABI = FFI_DEFAULT_ABI + 1
+} ffi_abi;
+#endif
+
+#define FFI_EXTRA_CIF_FIELDS unsigned int rstruct_flag
+
+/* Definitions for closures */
+
+#define FFI_CLOSURES 1
+#define FFI_TRAMPOLINE_SIZE 36
+#define FFI_NATIVE_RAW_API 0
+
+#endif
diff --git a/libffi/src/avr32/sysv.S b/libffi/src/avr32/sysv.S
new file mode 100644
index 000000000..a984b3c88
--- /dev/null
+++ b/libffi/src/avr32/sysv.S
@@ -0,0 +1,208 @@
+/* -----------------------------------------------------------------------
+ sysv.S - Copyright (c) 2009 Bradley Smith <brad@brad-smith.co.uk>
+
+ AVR32 Foreign Function Interface
+
+ Permission is hereby granted, free of charge, to any person obtaining
+ a copy of this software and associated documentation files (the
+ ``Software''), to deal in the Software without restriction, including
+ without limitation the rights to use, copy, modify, merge, publish,
+ distribute, sublicense, and/or sell copies of the Software, and to
+ permit persons to whom the Software is furnished to do so, subject to
+ the following conditions:
+
+ The above copyright notice and this permission notice shall be included
+ in all copies or substantial portions of the Software.
+
+ THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
+ EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
+ MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
+ IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY
+ CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT,
+ TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE
+ SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ --------------------------------------------------------------------- */
+
+#define LIBFFI_ASM
+#include <fficonfig.h>
+#include <ffi.h>
+
+ /* r12: ffi_prep_args
+ * r11: &ecif
+ * r10: size
+ * r9: cif->flags
+ * r8: ecif.rvalue
+ * sp+0: cif->rstruct_flag
+ * sp+4: fn */
+
+ .text
+ .align 1
+ .globl ffi_call_SYSV
+ .type ffi_call_SYSV, @function
+ffi_call_SYSV:
+ stm --sp, r0,r1,lr
+ stm --sp, r8-r12
+ mov r0, sp
+
+ /* Make room for all of the new args. */
+ sub sp, r10
+ /* Pad to make way for potential skipped registers */
+ sub sp, 20
+
+ /* Call ffi_prep_args(stack, &ecif). */
+ /* r11 already set */
+ mov r1, r12
+ mov r12, sp
+ icall r1
+
+ /* Save new argument size */
+ mov r1, r12
+
+ /* Move first 5 parameters in registers. */
+ ldm sp++, r8-r12
+
+ /* call (fn) (...). */
+ ld.w r1, r0[36]
+ icall r1
+
+ /* Remove the space we pushed for the args. */
+ mov sp, r0
+
+ /* Load r1 with the rstruct flag. */
+ ld.w r1, sp[32]
+
+ /* Load r9 with the return type code. */
+ ld.w r9, sp[12]
+
+ /* Load r8 with the return value pointer. */
+ ld.w r8, sp[16]
+
+ /* If the return value pointer is NULL, assume no return value. */
+ cp.w r8, 0
+ breq .Lend
+
+ /* Check if return type is actually a struct */
+ cp.w r1, 0
+ breq 1f
+
+ /* Return 8bit */
+ cp.w r9, FFI_TYPE_UINT8
+ breq .Lstore8
+
+ /* Return 16bit */
+ cp.w r9, FFI_TYPE_UINT16
+ breq .Lstore16
+
+1:
+ /* Return 32bit */
+ cp.w r9, FFI_TYPE_UINT32
+ breq .Lstore32
+ cp.w r9, FFI_TYPE_UINT16
+ breq .Lstore32
+ cp.w r9, FFI_TYPE_UINT8
+ breq .Lstore32
+
+ /* Return 64bit */
+ cp.w r9, FFI_TYPE_UINT64
+ breq .Lstore64
+
+ /* Didn't match anything */
+ bral .Lend
+
+.Lstore64:
+ st.w r8[0], r11
+ st.w r8[4], r10
+ bral .Lend
+
+.Lstore32:
+ st.w r8[0], r12
+ bral .Lend
+
+.Lstore16:
+ st.h r8[0], r12
+ bral .Lend
+
+.Lstore8:
+ st.b r8[0], r12
+ bral .Lend
+
+.Lend:
+ sub sp, -20
+ ldm sp++, r0,r1,pc
+
+ .size ffi_call_SYSV, . - ffi_call_SYSV
+
+
+ /* r12: __ctx
+ * r11: __rstruct_flag
+ * r10: __inner */
+
+ .align 1
+ .globl ffi_closure_SYSV
+ .type ffi_closure_SYSV, @function
+ffi_closure_SYSV:
+ stm --sp, r0,lr
+ mov r0, r11
+ mov r8, r10
+ sub r10, sp, -8
+ sub sp, 12
+ st.w sp[8], sp
+ sub r11, sp, -8
+ icall r8
+
+ /* Check if return type is actually a struct */
+ cp.w r0, 0
+ breq 1f
+
+ /* Return 8bit */
+ cp.w r12, FFI_TYPE_UINT8
+ breq .Lget8
+
+ /* Return 16bit */
+ cp.w r12, FFI_TYPE_UINT16
+ breq .Lget16
+
+1:
+ /* Return 32bit */
+ cp.w r12, FFI_TYPE_UINT32
+ breq .Lget32
+ cp.w r12, FFI_TYPE_UINT16
+ breq .Lget32
+ cp.w r12, FFI_TYPE_UINT8
+ breq .Lget32
+
+ /* Return 64bit */
+ cp.w r12, FFI_TYPE_UINT64
+ breq .Lget64
+
+ /* Didn't match anything */
+ bral .Lclend
+
+.Lget64:
+ ld.w r11, sp[0]
+ ld.w r10, sp[4]
+ bral .Lclend
+
+.Lget32:
+ ld.w r12, sp[0]
+ bral .Lclend
+
+.Lget16:
+ ld.uh r12, sp[0]
+ bral .Lclend
+
+.Lget8:
+ ld.ub r12, sp[0]
+ bral .Lclend
+
+.Lclend:
+ sub sp, -12
+ ldm sp++, r0,lr
+ sub sp, -20
+ mov pc, lr
+
+ .size ffi_closure_SYSV, . - ffi_closure_SYSV
+
+#if defined __ELF__ && defined __linux__
+ .section .note.GNU-stack,"",@progbits
+#endif
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