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Unified Diff: Modules/_ctypes/libffi_ios/aarch64/sysv_arm64.S

Issue 23670: Modifications to support iOS as a development platform
Patch Set: Created 3 years, 8 months ago
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000
+++ b/Modules/_ctypes/libffi_ios/aarch64/sysv_arm64.S Wed Mar 02 00:01:35 2016 +0000
@@ -0,0 +1,443 @@
+#ifdef __arm64__
+
+/* Copyright (c) 2009, 2010, 2011, 2012 ARM Ltd.
+
+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>
+#include <ffi_cfi.h>
+#include "internal.h"
+
+#ifdef HAVE_MACHINE_ASM_H
+#include <machine/asm.h>
+#else
+#ifdef __USER_LABEL_PREFIX__
+#define CONCAT1(a, b) CONCAT2(a, b)
+#define CONCAT2(a, b) a ## b
+
+/* Use the right prefix for global labels. */
+#define CNAME(x) CONCAT1 (__USER_LABEL_PREFIX__, x)
+#else
+#define CNAME(x) x
+#endif
+#endif
+
+#ifdef __AARCH64EB__
+# define BE(X) X
+#else
+# define BE(X) 0
+#endif
+
+#ifdef __ILP32__
+#define PTR_REG(n) w##n
+#else
+#define PTR_REG(n) x##n
+#endif
+
+#ifdef __ILP32__
+#define PTR_SIZE 4
+#else
+#define PTR_SIZE 8
+#endif
+
+ .text
+ .align 4
+
+/* ffi_call_SYSV
+ extern void ffi_call_SYSV (void *stack, void *frame,
+ void (*fn)(void), void *rvalue,
+ int flags, void *closure);
+
+ Therefore on entry we have:
+
+ x0 stack
+ x1 frame
+ x2 fn
+ x3 rvalue
+ x4 flags
+ x5 closure
+*/
+
+ cfi_startproc
+CNAME(ffi_call_SYSV):
+ /* Use a stack frame allocated by our caller. */
+ cfi_def_cfa(x1, 32);
+ stp x29, x30, [x1]
+ mov x29, x1
+ mov sp, x0
+ cfi_def_cfa_register(x29)
+ cfi_rel_offset (x29, 0)
+ cfi_rel_offset (x30, 8)
+
+ mov x9, x2 /* save fn */
+ mov x8, x3 /* install structure return */
+#ifdef FFI_GO_CLOSURES
+ mov x18, x5 /* install static chain */
+#endif
+ stp x3, x4, [x29, #16] /* save rvalue and flags */
+
+ /* Load the vector argument passing registers, if necessary. */
+ tbz w4, #AARCH64_FLAG_ARG_V_BIT, 1f
+ ldp q0, q1, [sp, #0]
+ ldp q2, q3, [sp, #32]
+ ldp q4, q5, [sp, #64]
+ ldp q6, q7, [sp, #96]
+1:
+ /* Load the core argument passing registers, including
+ the structure return pointer. */
+ ldp x0, x1, [sp, #16*N_V_ARG_REG + 0]
+ ldp x2, x3, [sp, #16*N_V_ARG_REG + 16]
+ ldp x4, x5, [sp, #16*N_V_ARG_REG + 32]
+ ldp x6, x7, [sp, #16*N_V_ARG_REG + 48]
+
+ /* Deallocate the context, leaving the stacked arguments. */
+ add sp, sp, #CALL_CONTEXT_SIZE
+
+ blr x9 /* call fn */
+
+ ldp x3, x4, [x29, #16] /* reload rvalue and flags */
+
+ /* Partially deconstruct the stack frame. */
+ mov sp, x29
+ cfi_def_cfa_register (sp)
+ ldp x29, x30, [x29]
+
+ /* Save the return value as directed. */
+ adr x5, 0f
+ and w4, w4, #AARCH64_RET_MASK
+ add x5, x5, x4, lsl #3
+ br x5
+
+ /* Note that each table entry is 2 insns, and thus 8 bytes.
+ For integer data, note that we're storing into ffi_arg
+ and therefore we want to extend to 64 bits; these types
+ have two consecutive entries allocated for them. */
+ .align 4
+0: ret /* VOID */
+ nop
+1: str x0, [x3] /* INT64 */
+ ret
+2: stp x0, x1, [x3] /* INT128 */
+ ret
+3: brk #1000 /* UNUSED */
+ ret
+4: brk #1000 /* UNUSED */
+ ret
+5: brk #1000 /* UNUSED */
+ ret
+6: brk #1000 /* UNUSED */
+ ret
+7: brk #1000 /* UNUSED */
+ ret
+8: st4 { v0.s, v1.s, v2.s, v3.s }[0], [x3] /* S4 */
+ ret
+9: st3 { v0.s, v1.s, v2.s }[0], [x3] /* S3 */
+ ret
+10: stp s0, s1, [x3] /* S2 */
+ ret
+11: str s0, [x3] /* S1 */
+ ret
+12: st4 { v0.d, v1.d, v2.d, v3.d }[0], [x3] /* D4 */
+ ret
+13: st3 { v0.d, v1.d, v2.d }[0], [x3] /* D3 */
+ ret
+14: stp d0, d1, [x3] /* D2 */
+ ret
+15: str d0, [x3] /* D1 */
+ ret
+16: str q3, [x3, #48] /* Q4 */
+ nop
+17: str q2, [x3, #32] /* Q3 */
+ nop
+18: stp q0, q1, [x3] /* Q2 */
+ ret
+19: str q0, [x3] /* Q1 */
+ ret
+20: uxtb w0, w0 /* UINT8 */
+ str x0, [x3]
+21: ret /* reserved */
+ nop
+22: uxth w0, w0 /* UINT16 */
+ str x0, [x3]
+23: ret /* reserved */
+ nop
+24: mov w0, w0 /* UINT32 */
+ str x0, [x3]
+25: ret /* reserved */
+ nop
+26: sxtb x0, w0 /* SINT8 */
+ str x0, [x3]
+27: ret /* reserved */
+ nop
+28: sxth x0, w0 /* SINT16 */
+ str x0, [x3]
+29: ret /* reserved */
+ nop
+30: sxtw x0, w0 /* SINT32 */
+ str x0, [x3]
+31: ret /* reserved */
+ nop
+
+ cfi_endproc
+
+ .globl CNAME(ffi_call_SYSV)
+#ifdef __ELF__
+ .type CNAME(ffi_call_SYSV), #function
+ .hidden CNAME(ffi_call_SYSV)
+ .size CNAME(ffi_call_SYSV), .-CNAME(ffi_call_SYSV)
+#endif
+
+/* ffi_closure_SYSV
+
+ Closure invocation glue. This is the low level code invoked directly by
+ the closure trampoline to setup and call a closure.
+
+ On entry x17 points to a struct ffi_closure, x16 has been clobbered
+ all other registers are preserved.
+
+ We allocate a call context and save the argument passing registers,
+ then invoked the generic C ffi_closure_SYSV_inner() function to do all
+ the real work, on return we load the result passing registers back from
+ the call context.
+*/
+
+#define ffi_closure_SYSV_FS (8*2 + CALL_CONTEXT_SIZE + 64)
+
+ .align 4
+CNAME(ffi_closure_SYSV_V):
+ cfi_startproc
+ stp x29, x30, [sp, #-ffi_closure_SYSV_FS]!
+ cfi_adjust_cfa_offset (ffi_closure_SYSV_FS)
+ cfi_rel_offset (x29, 0)
+ cfi_rel_offset (x30, 8)
+
+ /* Save the argument passing vector registers. */
+ stp q0, q1, [sp, #16 + 0]
+ stp q2, q3, [sp, #16 + 32]
+ stp q4, q5, [sp, #16 + 64]
+ stp q6, q7, [sp, #16 + 96]
+ b 0f
+ cfi_endproc
+
+ .globl CNAME(ffi_closure_SYSV_V)
+#ifdef __ELF__
+ .type CNAME(ffi_closure_SYSV_V), #function
+ .hidden CNAME(ffi_closure_SYSV_V)
+ .size CNAME(ffi_closure_SYSV_V), . - CNAME(ffi_closure_SYSV_V)
+#endif
+
+ .align 4
+ cfi_startproc
+CNAME(ffi_closure_SYSV):
+ stp x29, x30, [sp, #-ffi_closure_SYSV_FS]!
+ cfi_adjust_cfa_offset (ffi_closure_SYSV_FS)
+ cfi_rel_offset (x29, 0)
+ cfi_rel_offset (x30, 8)
+0:
+ mov x29, sp
+
+ /* Save the argument passing core registers. */
+ stp x0, x1, [sp, #16 + 16*N_V_ARG_REG + 0]
+ stp x2, x3, [sp, #16 + 16*N_V_ARG_REG + 16]
+ stp x4, x5, [sp, #16 + 16*N_V_ARG_REG + 32]
+ stp x6, x7, [sp, #16 + 16*N_V_ARG_REG + 48]
+
+ /* Load ffi_closure_inner arguments. */
+ ldp PTR_REG(0), PTR_REG(1), [x17, #FFI_TRAMPOLINE_CLOSURE_OFFSET] /* load cif, fn */
+ ldr PTR_REG(2), [x17, #FFI_TRAMPOLINE_CLOSURE_OFFSET+PTR_SIZE*2] /* load user_data */
+.Ldo_closure:
+ add x3, sp, #16 /* load context */
+ add x4, sp, #ffi_closure_SYSV_FS /* load stack */
+ add x5, sp, #16+CALL_CONTEXT_SIZE /* load rvalue */
+ mov x6, x8 /* load struct_rval */
+ bl CNAME(ffi_closure_SYSV_inner)
+
+ /* Load the return value as directed. */
+ adr x1, 0f
+ and w0, w0, #AARCH64_RET_MASK
+ add x1, x1, x0, lsl #3
+ add x3, sp, #16+CALL_CONTEXT_SIZE
+ br x1
+
+ /* Note that each table entry is 2 insns, and thus 8 bytes. */
+ .align 4
+0: b 99f /* VOID */
+ nop
+1: ldr x0, [x3] /* INT64 */
+ b 99f
+2: ldp x0, x1, [x3] /* INT128 */
+ b 99f
+3: brk #1000 /* UNUSED */
+ nop
+4: brk #1000 /* UNUSED */
+ nop
+5: brk #1000 /* UNUSED */
+ nop
+6: brk #1000 /* UNUSED */
+ nop
+7: brk #1000 /* UNUSED */
+ nop
+8: ldr s3, [x3, #12] /* S4 */
+ nop
+9: ldr s2, [x2, #8] /* S3 */
+ nop
+10: ldp s0, s1, [x3] /* S2 */
+ b 99f
+11: ldr s0, [x3] /* S1 */
+ b 99f
+12: ldr d3, [x3, #24] /* D4 */
+ nop
+13: ldr d2, [x3, #16] /* D3 */
+ nop
+14: ldp d0, d1, [x3] /* D2 */
+ b 99f
+15: ldr d0, [x3] /* D1 */
+ b 99f
+16: ldr q3, [x3, #48] /* Q4 */
+ nop
+17: ldr q2, [x3, #32] /* Q3 */
+ nop
+18: ldp q0, q1, [x3] /* Q2 */
+ b 99f
+19: ldr q0, [x3] /* Q1 */
+ b 99f
+20: ldrb w0, [x3, #BE(7)] /* UINT8 */
+ b 99f
+21: brk #1000 /* reserved */
+ nop
+22: ldrh w0, [x3, #BE(6)] /* UINT16 */
+ b 99f
+23: brk #1000 /* reserved */
+ nop
+24: ldr w0, [x3, #BE(4)] /* UINT32 */
+ b 99f
+25: brk #1000 /* reserved */
+ nop
+26: ldrsb x0, [x3, #BE(7)] /* SINT8 */
+ b 99f
+27: brk #1000 /* reserved */
+ nop
+28: ldrsh x0, [x3, #BE(6)] /* SINT16 */
+ b 99f
+29: brk #1000 /* reserved */
+ nop
+30: ldrsw x0, [x3, #BE(4)] /* SINT32 */
+ nop
+31: /* reserved */
+99: ldp x29, x30, [sp], #ffi_closure_SYSV_FS
+ cfi_adjust_cfa_offset (-ffi_closure_SYSV_FS)
+ cfi_restore (x29)
+ cfi_restore (x30)
+ ret
+ cfi_endproc
+
+ .globl CNAME(ffi_closure_SYSV)
+#ifdef __ELF__
+ .type CNAME(ffi_closure_SYSV), #function
+ .hidden CNAME(ffi_closure_SYSV)
+ .size CNAME(ffi_closure_SYSV), . - CNAME(ffi_closure_SYSV)
+#endif
+
+#if FFI_EXEC_TRAMPOLINE_TABLE
+
+#ifdef __MACH__
+#include <mach/vm_param.h>
+ .align PAGE_MAX_SHIFT
+CNAME(ffi_closure_trampoline_table_page):
+ .rept PAGE_MAX_SIZE / FFI_TRAMPOLINE_SIZE
+ adr x16, -PAGE_MAX_SIZE
+ ldp x17, x16, [x16]
+ br x16
+ nop /* each entry in the trampoline config page is 2*sizeof(void*) so the trampoline itself cannot be smaller that 16 bytes */
+ .endr
+
+ .globl CNAME(ffi_closure_trampoline_table_page)
+ #ifdef __ELF__
+ .type CNAME(ffi_closure_trampoline_table_page), #function
+ .hidden CNAME(ffi_closure_trampoline_table_page)
+ .size CNAME(ffi_closure_trampoline_table_page), . - CNAME(ffi_closure_trampoline_table_page)
+ #endif
+#endif
+
+#endif /* FFI_EXEC_TRAMPOLINE_TABLE */
+
+#ifdef FFI_GO_CLOSURES
+ .align 4
+CNAME(ffi_go_closure_SYSV_V):
+ cfi_startproc
+ stp x29, x30, [sp, #-ffi_closure_SYSV_FS]!
+ cfi_adjust_cfa_offset (ffi_closure_SYSV_FS)
+ cfi_rel_offset (x29, 0)
+ cfi_rel_offset (x30, 8)
+
+ /* Save the argument passing vector registers. */
+ stp q0, q1, [sp, #16 + 0]
+ stp q2, q3, [sp, #16 + 32]
+ stp q4, q5, [sp, #16 + 64]
+ stp q6, q7, [sp, #16 + 96]
+ b 0f
+ cfi_endproc
+
+ .globl CNAME(ffi_go_closure_SYSV_V)
+#ifdef __ELF__
+ .type CNAME(ffi_go_closure_SYSV_V), #function
+ .hidden CNAME(ffi_go_closure_SYSV_V)
+ .size CNAME(ffi_go_closure_SYSV_V), . - CNAME(ffi_go_closure_SYSV_V)
+#endif
+
+ .align 4
+ cfi_startproc
+CNAME(ffi_go_closure_SYSV):
+ stp x29, x30, [sp, #-ffi_closure_SYSV_FS]!
+ cfi_adjust_cfa_offset (ffi_closure_SYSV_FS)
+ cfi_rel_offset (x29, 0)
+ cfi_rel_offset (x30, 8)
+0:
+ mov x29, sp
+
+ /* Save the argument passing core registers. */
+ stp x0, x1, [sp, #16 + 16*N_V_ARG_REG + 0]
+ stp x2, x3, [sp, #16 + 16*N_V_ARG_REG + 16]
+ stp x4, x5, [sp, #16 + 16*N_V_ARG_REG + 32]
+ stp x6, x7, [sp, #16 + 16*N_V_ARG_REG + 48]
+
+ /* Load ffi_closure_inner arguments. */
+ ldp PTR_REG(0), PTR_REG(1), [x18, #PTR_SIZE]/* load cif, fn */
+ mov x2, x18 /* load user_data */
+ b .Ldo_closure
+ cfi_endproc
+
+ .globl CNAME(ffi_go_closure_SYSV)
+#ifdef __ELF__
+ .type CNAME(ffi_go_closure_SYSV), #function
+ .hidden CNAME(ffi_go_closure_SYSV)
+ .size CNAME(ffi_go_closure_SYSV), . - CNAME(ffi_go_closure_SYSV)
+#endif
+#endif /* FFI_GO_CLOSURES */
+
+#if defined __ELF__ && defined __linux__
+ .section .note.GNU-stack,"",%progbits
+#endif
+
+
+
+#endif
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