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-rw-r--r--libffi/src/kvx/asm.h5
-rw-r--r--libffi/src/kvx/ffi.c273
-rw-r--r--libffi/src/kvx/ffitarget.h75
-rw-r--r--libffi/src/kvx/sysv.S127
4 files changed, 480 insertions, 0 deletions
diff --git a/libffi/src/kvx/asm.h b/libffi/src/kvx/asm.h
new file mode 100644
index 0000000..4edba41
--- /dev/null
+++ b/libffi/src/kvx/asm.h
@@ -0,0 +1,5 @@
+/* args are passed on registers from r0 up to r11 => 12*8 bytes */
+#define REG_ARGS_SIZE (12*8)
+#define KVX_REGISTER_SIZE (8)
+#define KVX_ABI_SLOT_SIZE (KVX_REGISTER_SIZE)
+#define KVX_ABI_MAX_AGGREGATE_IN_REG_SIZE (4*KVX_ABI_SLOT_SIZE)
diff --git a/libffi/src/kvx/ffi.c b/libffi/src/kvx/ffi.c
new file mode 100644
index 0000000..58f6aef
--- /dev/null
+++ b/libffi/src/kvx/ffi.c
@@ -0,0 +1,273 @@
+/* Copyright (c) 2020 Kalray
+
+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. */
+
+#if defined(__kvx__)
+#include <stdio.h>
+#include <stdlib.h>
+#include <stdint.h>
+#include <fficonfig.h>
+#include <ffi.h>
+#include "ffi_common.h"
+#include "asm.h"
+
+#define ALIGN(x, a) ALIGN_MASK(x, (typeof(x))(a) - 1)
+#define ALIGN_MASK(x, mask) (((x) + (mask)) & ~(mask))
+#define KVX_ABI_STACK_ALIGNMENT (32)
+#define KVX_ABI_STACK_ARG_ALIGNMENT (8)
+#define max(a,b) ((a) > (b) ? (a) : (b))
+
+#ifdef FFI_DEBUG
+#define DEBUG_PRINT(...) do{ fprintf( stderr, __VA_ARGS__ ); } while(0)
+#else
+#define DEBUG_PRINT(...)
+#endif
+
+struct ret_value {
+ unsigned long int r0;
+ unsigned long int r1;
+ unsigned long int r2;
+ unsigned long int r3;
+};
+
+extern struct ret_value ffi_call_SYSV(unsigned total_size,
+ unsigned size,
+ extended_cif *ecif,
+ unsigned *rvalue_addr,
+ void *fn,
+ unsigned int_ext_method);
+
+/* Perform machine dependent cif processing */
+ffi_status ffi_prep_cif_machdep(ffi_cif *cif)
+{
+ cif->flags = cif->rtype->size;
+ return FFI_OK;
+}
+
+/* ffi_prep_args is called by the assembly routine once stack space
+ has been allocated for the function's arguments */
+
+void *ffi_prep_args(char *stack, unsigned int arg_slots_size, extended_cif *ecif)
+{
+ char *stacktemp = stack;
+ char *current_arg_passed_by_value = stack + arg_slots_size;
+ int i, s;
+ ffi_type **arg;
+ int count = 0;
+ ffi_cif *cif = ecif->cif;
+ void **argv = ecif->avalue;
+
+ arg = cif->arg_types;
+
+ DEBUG_PRINT("stack: %p\n", stack);
+ DEBUG_PRINT("arg_slots_size: %u\n", arg_slots_size);
+ DEBUG_PRINT("current_arg_passed_by_value: %p\n", current_arg_passed_by_value);
+ DEBUG_PRINT("ecif: %p\n", ecif);
+ DEBUG_PRINT("ecif->avalue: %p\n", ecif->avalue);
+
+ for (i = 0; i < cif->nargs; i++) {
+
+ s = KVX_ABI_SLOT_SIZE;
+ switch((*arg)->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_FLOAT:
+ case FFI_TYPE_DOUBLE:
+ case FFI_TYPE_UINT64:
+ case FFI_TYPE_SINT64:
+ case FFI_TYPE_POINTER:
+ DEBUG_PRINT("INT64/32/16/8/FLOAT/DOUBLE or POINTER @%p\n", stack);
+ *(uint64_t *) stack = *(uint64_t *)(* argv);
+ break;
+
+ case FFI_TYPE_COMPLEX:
+ if ((*arg)->size == 8)
+ *(_Complex float *) stack = *(_Complex float *)(* argv);
+ else if ((*arg)->size == 16) {
+ *(_Complex double *) stack = *(_Complex double *)(* argv);
+ s = 16;
+ } else
+ abort();
+ break;
+ case FFI_TYPE_STRUCT: {
+ char *value;
+ unsigned int written_size = 0;
+ DEBUG_PRINT("struct by value @%p\n", stack);
+ if ((*arg)->size > KVX_ABI_MAX_AGGREGATE_IN_REG_SIZE) {
+ DEBUG_PRINT("big struct\n");
+ *(uint64_t *) stack = (uintptr_t)current_arg_passed_by_value;
+ value = current_arg_passed_by_value;
+ current_arg_passed_by_value += (*arg)->size;
+ written_size = KVX_ABI_SLOT_SIZE;
+ } else {
+ value = stack;
+ written_size = (*arg)->size;
+ }
+ memcpy(value, *argv, (*arg)->size);
+ s = ALIGN(written_size, KVX_ABI_STACK_ARG_ALIGNMENT);
+ break;
+ }
+ default:
+ printf("Error: unsupported arg type %d\n", (*arg)->type);
+ abort();
+ break;
+
+ }
+ stack += s;
+ count += s;
+ argv++;
+ arg++;
+ }
+#ifdef FFI_DEBUG
+ FFI_ASSERT(((intptr_t)(stacktemp + REG_ARGS_SIZE) & (KVX_ABI_STACK_ALIGNMENT-1)) == 0);
+#endif
+ return stacktemp + REG_ARGS_SIZE;
+}
+
+/* Perform machine dependent cif processing when we have a variadic function */
+
+ffi_status ffi_prep_cif_machdep_var(ffi_cif *cif, unsigned int nfixedargs,
+ unsigned int ntotalargs)
+{
+ cif->flags = cif->rtype->size;
+ return FFI_OK;
+}
+
+static unsigned long handle_small_int_ext(kvx_intext_method *int_ext_method,
+ const ffi_type *rtype)
+{
+ switch (rtype->type) {
+ case FFI_TYPE_SINT8:
+ *int_ext_method = KVX_RET_SXBD;
+ return KVX_REGISTER_SIZE;
+
+ case FFI_TYPE_SINT16:
+ *int_ext_method = KVX_RET_SXHD;
+ return KVX_REGISTER_SIZE;
+
+ case FFI_TYPE_SINT32:
+ *int_ext_method = KVX_RET_SXWD;
+ return KVX_REGISTER_SIZE;
+
+ case FFI_TYPE_UINT8:
+ *int_ext_method = KVX_RET_ZXBD;
+ return KVX_REGISTER_SIZE;
+
+ case FFI_TYPE_UINT16:
+ *int_ext_method = KVX_RET_ZXHD;
+ return KVX_REGISTER_SIZE;
+
+ case FFI_TYPE_UINT32:
+ *int_ext_method = KVX_RET_ZXWD;
+ return KVX_REGISTER_SIZE;
+
+ default:
+ *int_ext_method = KVX_RET_NONE;
+ return rtype->size;
+ }
+}
+
+void ffi_call(ffi_cif *cif, void (*fn)(void), void *rvalue, void **avalue)
+{
+ int i;
+ unsigned long int slot_fitting_args_size = 0;
+ unsigned long int total_size = 0;
+ unsigned long int big_struct_size = 0;
+ kvx_intext_method int_extension_method;
+ ffi_type **arg;
+ struct ret_value local_rvalue = {0};
+ size_t wb_size;
+
+
+ /* Calculate size to allocate on stack */
+ for (i = 0, arg = cif->arg_types; i < cif->nargs; i++, arg++) {
+ DEBUG_PRINT("argument %d, type %d, size %lu\n", i, (*arg)->type, (*arg)->size);
+ if (((*arg)->type == FFI_TYPE_STRUCT) || ((*arg)->type == FFI_TYPE_COMPLEX)) {
+ if ((*arg)->size <= KVX_ABI_MAX_AGGREGATE_IN_REG_SIZE) {
+ slot_fitting_args_size += ALIGN((*arg)->size, KVX_ABI_SLOT_SIZE);
+ } else {
+ slot_fitting_args_size += KVX_ABI_SLOT_SIZE; /* aggregate passed by reference */
+ big_struct_size += ALIGN((*arg)->size, KVX_ABI_SLOT_SIZE);
+ }
+ } else if ((*arg)->size <= KVX_ABI_SLOT_SIZE) {
+ slot_fitting_args_size += KVX_ABI_SLOT_SIZE;
+ } else {
+ printf("Error: unsupported arg size %ld arg type %d\n", (*arg)->size, (*arg)->type);
+ abort(); /* should never happen? */
+ }
+ }
+
+ extended_cif ecif;
+ ecif.cif = cif;
+ ecif.avalue = avalue;
+ ecif.rvalue = rvalue;
+
+ /* This implementation allocates anyway for all register based args */
+ slot_fitting_args_size = max(slot_fitting_args_size, REG_ARGS_SIZE);
+ total_size = slot_fitting_args_size + big_struct_size;
+ total_size = ALIGN(total_size, KVX_ABI_STACK_ALIGNMENT);
+
+ /* wb_size: write back size, the size we will need to write back to user
+ * provided buffer. In theory it should always be cif->flags which is
+ * cif->rtype->size. But libffi API mandates that for integral types
+ * of size <= system register size, then we *MUST* write back
+ * the size of system register size.
+ * in our case, if size <= 8 bytes we must write back 8 bytes.
+ * floats, complex and structs are not affected, only integrals.
+ */
+ wb_size = handle_small_int_ext(&int_extension_method, cif->rtype);
+
+ switch (cif->abi) {
+ case FFI_SYSV:
+ DEBUG_PRINT("total_size: %lu\n", total_size);
+ DEBUG_PRINT("slot fitting args size: %lu\n", slot_fitting_args_size);
+ DEBUG_PRINT("rvalue: %p\n", rvalue);
+ DEBUG_PRINT("fn: %p\n", fn);
+ DEBUG_PRINT("rsize: %u\n", cif->flags);
+ DEBUG_PRINT("wb_size: %u\n", wb_size);
+ DEBUG_PRINT("int_extension_method: %u\n", int_extension_method);
+ local_rvalue = ffi_call_SYSV(total_size, slot_fitting_args_size,
+ &ecif, rvalue, fn, int_extension_method);
+ if ((cif->flags <= KVX_ABI_MAX_AGGREGATE_IN_REG_SIZE)
+ && (cif->rtype->type != FFI_TYPE_VOID))
+ memcpy(rvalue, &local_rvalue, wb_size);
+ break;
+ default:
+ abort();
+ break;
+ }
+}
+
+/* Closures not supported yet */
+ffi_status
+ffi_prep_closure_loc (ffi_closure* closure,
+ ffi_cif* cif,
+ void (*fun)(ffi_cif*,void*,void**,void*),
+ void *user_data,
+ void *codeloc)
+{
+ return FFI_BAD_ABI;
+}
+
+#endif /* (__kvx__) */
diff --git a/libffi/src/kvx/ffitarget.h b/libffi/src/kvx/ffitarget.h
new file mode 100644
index 0000000..8df8735
--- /dev/null
+++ b/libffi/src/kvx/ffitarget.h
@@ -0,0 +1,75 @@
+/* -----------------------------------------------------------------------
+ ffitarget.h - Copyright (c) 2020 Kalray
+
+ KVX Target configuration macros
+
+ 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_H
+#error "Please do not include ffitarget.h directly into your source. Use ffi.h instead."
+#endif
+
+/* ---- System specific configurations ----------------------------------- */
+
+#ifndef LIBFFI_ASM
+typedef unsigned long ffi_arg;
+typedef signed long ffi_sarg;
+
+typedef enum ffi_abi {
+ FFI_FIRST_ABI = 0,
+ FFI_SYSV,
+ FFI_LAST_ABI,
+ FFI_DEFAULT_ABI = FFI_SYSV
+} ffi_abi;
+
+/* Those values are set depending on return type
+ * they are used in the assembly code in sysv.S
+ */
+typedef enum kvx_intext_method {
+ KVX_RET_NONE = 0,
+ KVX_RET_SXBD = 1,
+ KVX_RET_SXHD = 2,
+ KVX_RET_SXWD = 3,
+ KVX_RET_ZXBD = 4,
+ KVX_RET_ZXHD = 5,
+ KVX_RET_ZXWD = 6
+} kvx_intext_method;
+
+#endif
+
+/* ---- Definitions for closures ----------------------------------------- */
+
+/* This is only to allow Python to compile
+ * but closures are not supported yet
+ */
+#define FFI_CLOSURES 1
+#define FFI_TRAMPOLINE_SIZE 0
+
+#define FFI_NATIVE_RAW_API 0
+#define FFI_TARGET_SPECIFIC_VARIADIC 1
+#define FFI_TARGET_HAS_COMPLEX_TYPE
+
+#endif
+
diff --git a/libffi/src/kvx/sysv.S b/libffi/src/kvx/sysv.S
new file mode 100644
index 0000000..952afc7
--- /dev/null
+++ b/libffi/src/kvx/sysv.S
@@ -0,0 +1,127 @@
+/* Copyright (c) 2020 Kalray
+
+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. */
+
+#if defined(__kvx__)
+#define LIBFFI_ASM
+#include <fficonfig.h>
+#include <ffi.h>
+#include <ffi_cfi.h>
+#include <kvx/asm.h>
+
+.text
+.global ffi_call_SYSV
+.type ffi_call_SYSV, @function
+.type ffi_prep_args, @function
+.align 8
+
+/* ffi_call_SYSV
+
+ r0: total size to allocate on stack
+ r1: size of arg slots
+ r2: extended cif structure, DO NOT REMOVE: it is used by ffi_prep_args()
+ r3: return value address
+ r4: function to call
+ r5: integer sign extension method to be used
+*/
+ffi_call_SYSV:
+ addd $r12 = $r12, -64
+ so (-32)[$r12] = $r20r21r22r23
+ ;;
+ sd (0)[$r12] = $r24
+ ;;
+ get $r23 = $ra
+ copyd $r20 = $r12
+ sbfd $r12 = $r0, $r12
+ ;;
+ copyd $r0 = $r12
+ copyd $r21 = $r3
+ copyd $r22 = $r4
+ copyd $r24 = $r5
+ call ffi_prep_args
+ ;;
+ lo $r8r9r10r11 = (64)[$r12]
+ ;;
+ lo $r4r5r6r7 = (32)[$r12]
+ ;;
+ lo $r0r1r2r3 = (0)[$r12]
+ copyd $r12 = $r0
+ /* $r15 is the register used by the ABI to return big (>32 bytes)
+ * structs by value.
+ * It is also referred to as the "struct register" in the ABI.
+ */
+ copyd $r15 = $r21
+ icall $r22
+ ;;
+ pcrel $r4 = @pcrel(.Ltable)
+ cb.deqz $r24 ? .Lend
+ ;;
+ addx8d $r24 = $r24, $r4
+ ;;
+ igoto $r24
+ ;;
+.Ltable:
+0: /* we should never arrive here */
+ goto .Lerror
+ nop
+ ;;
+1: /* Sign extend byte to double */
+ sxbd $r0 = $r0
+ goto .Lend
+ ;;
+2: /* Sign extend half to double */
+ sxhd $r0 = $r0
+ goto .Lend
+ ;;
+3: /* Sign extend word to double */
+ sxwd $r0 = $r0
+ goto .Lend
+ ;;
+4: /* Zero extend byte to double */
+ zxbd $r0 = $r0
+ goto .Lend
+ ;;
+5: /* Zero extend half to double */
+ zxhd $r0 = $r0
+ goto .Lend
+ ;;
+6: /* Zero extend word to double */
+ zxwd $r0 = $r0
+ /* Fallthrough to .Lend */
+ ;;
+.Lend:
+ ld $r24 = (0)[$r12]
+ ;;
+ set $ra = $r23
+ lo $r20r21r22r23 = (32)[$r20]
+ addd $r12 = $r20, 64
+ ;;
+ ret
+ ;;
+.Lerror:
+ errop
+ ;;
+
+#endif /* __kvx__ */
+
+#if defined __ELF__ && defined __linux__
+ .section .note.GNU-stack,"",%progbits
+#endif
+
generated by cgit v1.1 at 2024-08-16 11:38:08 +0000