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c2a6859012d928b67a83619bd5087674a96b9254
libffi/src/aarch64/win64_armasm.S
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Paul Monson c2a6859012 fix mingw build and crashing bugs for Python Windows ARM64 (#496) 
* fix mingw build and crashing bugs for Python Windows ARM64

* Fix issues found in PR review
2019-08-07 14:57:45 -04:00

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ArmAsm
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/* 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"
OPT 2 /*disable listing */
/* For some macros to add unwind information */
#include "ksarm64.h"
OPT 1 /*re-enable listing */
#define BE(X) 0
#define PTR_REG(n) x##n
#define PTR_SIZE 8
IMPORT ffi_closure_SYSV_inner
EXPORT ffi_call_SYSV
EXPORT ffi_closure_SYSV_V
EXPORT ffi_closure_SYSV
EXPORT extend_hfa_type
EXPORT compress_hfa_type
#ifdef FFI_GO_CLOSURES
EXPORT ffi_go_closure_SYSV_V
EXPORT ffi_go_closure_SYSV
#endif
TEXTAREA, ALLIGN=8
/* 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
*/
NESTED_ENTRY ffi_call_SYSV_fake
/* For unwind information, Windows has to store fp and lr */
PROLOG_SAVE_REG_PAIR x29, x30, #-32!
ALTERNATE_ENTRY ffi_call_SYSV
/* Use a stack frame allocated by our caller. */
stp x29, x30, [x1]
mov x29, x1
mov sp, x0
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 x4, #AARCH64_FLAG_ARG_V_BIT, ffi_call_SYSV_L1
ldp q0, q1, [sp, #0]
ldp q2, q3, [sp, #32]
ldp q4, q5, [sp, #64]
ldp q6, q7, [sp, #96]
ffi_call_SYSV_L1
/* 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
ldp x29, x30, [x29]
/* Save the return value as directed. */
adr x5, ffi_call_SYSV_return
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
ffi_call_SYSV_return
ret /* VOID */
nop
str x0, [x3] /* INT64 */
ret
stp x0, x1, [x3] /* INT128 */
ret
brk #1000 /* UNUSED */
ret
brk #1000 /* UNUSED */
ret
brk #1000 /* UNUSED */
ret
brk #1000 /* UNUSED */
ret
brk #1000 /* UNUSED */
ret
st4 { v0.s, v1.s, v2.s, v3.s }[0], [x3] /* S4 */
ret
st3 { v0.s, v1.s, v2.s }[0], [x3] /* S3 */
ret
stp s0, s1, [x3] /* S2 */
ret
str s0, [x3] /* S1 */
ret
st4 { v0.d, v1.d, v2.d, v3.d }[0], [x3] /* D4 */
ret
st3 { v0.d, v1.d, v2.d }[0], [x3] /* D3 */
ret
stp d0, d1, [x3] /* D2 */
ret
str d0, [x3] /* D1 */
ret
str q3, [x3, #48] /* Q4 */
nop
str q2, [x3, #32] /* Q3 */
nop
stp q0, q1, [x3] /* Q2 */
ret
str q0, [x3] /* Q1 */
ret
uxtb w0, w0 /* UINT8 */
str x0, [x3]
ret /* reserved */
nop
uxth w0, w0 /* UINT16 */
str x0, [x3]
ret /* reserved */
nop
mov w0, w0 /* UINT32 */
str x0, [x3]
ret /* reserved */
nop
sxtb x0, w0 /* SINT8 */
str x0, [x3]
ret /* reserved */
nop
sxth x0, w0 /* SINT16 */
str x0, [x3]
ret /* reserved */
nop
sxtw x0, w0 /* SINT32 */
str x0, [x3]
ret /* reserved */
nop
NESTED_END ffi_call_SYSV_fake
/* 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)
NESTED_ENTRY ffi_closure_SYSV_V
PROLOG_SAVE_REG_PAIR x29, x30, #-ffi_closure_SYSV_FS!
/* 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 ffi_closure_SYSV_save_argument
NESTED_END ffi_closure_SYSV_V
NESTED_ENTRY ffi_closure_SYSV
PROLOG_SAVE_REG_PAIR x29, x30, #-ffi_closure_SYSV_FS!
ffi_closure_SYSV_save_argument
/* 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 */
do_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 ffi_closure_SYSV_inner
/* Load the return value as directed. */
adr x1, ffi_closure_SYSV_return_base
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 8
ffi_closure_SYSV_return_base
b ffi_closure_SYSV_epilog /* VOID */
nop
ldr x0, [x3] /* INT64 */
b ffi_closure_SYSV_epilog
ldp x0, x1, [x3] /* INT128 */
b ffi_closure_SYSV_epilog
brk #1000 /* UNUSED */
nop
brk #1000 /* UNUSED */
nop
brk #1000 /* UNUSED */
nop
brk #1000 /* UNUSED */
nop
brk #1000 /* UNUSED */
nop
ldr s3, [x3, #12] /* S4 */
nop
ldr s2, [x3, #8] /* S3 */
nop
ldp s0, s1, [x3] /* S2 */
b ffi_closure_SYSV_epilog
ldr s0, [x3] /* S1 */
b ffi_closure_SYSV_epilog
ldr d3, [x3, #24] /* D4 */
nop
ldr d2, [x3, #16] /* D3 */
nop
ldp d0, d1, [x3] /* D2 */
b ffi_closure_SYSV_epilog
ldr d0, [x3] /* D1 */
b ffi_closure_SYSV_epilog
ldr q3, [x3, #48] /* Q4 */
nop
ldr q2, [x3, #32] /* Q3 */
nop
ldp q0, q1, [x3] /* Q2 */
b ffi_closure_SYSV_epilog
ldr q0, [x3] /* Q1 */
b ffi_closure_SYSV_epilog
ldrb w0, [x3, #BE(7)] /* UINT8 */
b ffi_closure_SYSV_epilog
brk #1000 /* reserved */
nop
ldrh w0, [x3, #BE(6)] /* UINT16 */
b ffi_closure_SYSV_epilog
brk #1000 /* reserved */
nop
ldr w0, [x3, #BE(4)] /* UINT32 */
b ffi_closure_SYSV_epilog
brk #1000 /* reserved */
nop
ldrsb x0, [x3, #BE(7)] /* SINT8 */
b ffi_closure_SYSV_epilog
brk #1000 /* reserved */
nop
ldrsh x0, [x3, #BE(6)] /* SINT16 */
b ffi_closure_SYSV_epilog
brk #1000 /* reserved */
nop
ldrsw x0, [x3, #BE(4)] /* SINT32 */
nop
/* reserved */
ffi_closure_SYSV_epilog
EPILOG_RESTORE_REG_PAIR x29, x30, #ffi_closure_SYSV_FS!
EPILOG_RETURN
NESTED_END ffi_closure_SYSV
#ifdef FFI_GO_CLOSURES
NESTED_ENTRY ffi_go_closure_SYSV_V
PROLOG_SAVE_REG_PAIR x29, x30, #-ffi_closure_SYSV_FS!
/* 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 ffi_go_closure_SYSV_save_argument
NESTED_END ffi_go_closure_SYSV_V
NESTED_ENTRY ffi_go_closure_SYSV
PROLOG_SAVE_REG_PAIR x29, x30, #-ffi_closure_SYSV_FS!
ffi_go_closure_SYSV_save_argument
/* 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 do_closure
NESTED_END ffi_go_closure_SYSV
#endif /* FFI_GO_CLOSURES */
/* void extend_hfa_type (void *dest, void *src, int h) */
LEAF_ENTRY extend_hfa_type
adr x3, extend_hfa_type_jump_base
and w2, w2, #AARCH64_RET_MASK
sub x2, x2, #AARCH64_RET_S4
add x3, x3, x2, lsl #4
br x3
ALIGN 4
extend_hfa_type_jump_base
ldp s16, s17, [x1] /* S4 */
ldp s18, s19, [x1, #8]
b extend_hfa_type_store_4
nop
ldp s16, s17, [x1] /* S3 */
ldr s18, [x1, #8]
b extend_hfa_type_store_3
nop
ldp s16, s17, [x1] /* S2 */
b extend_hfa_type_store_2
nop
nop
ldr s16, [x1] /* S1 */
b extend_hfa_type_store_1
nop
nop
ldp d16, d17, [x1] /* D4 */
ldp d18, d19, [x1, #16]
b extend_hfa_type_store_4
nop
ldp d16, d17, [x1] /* D3 */
ldr d18, [x1, #16]
b extend_hfa_type_store_3
nop
ldp d16, d17, [x1] /* D2 */
b extend_hfa_type_store_2
nop
nop
ldr d16, [x1] /* D1 */
b extend_hfa_type_store_1
nop
nop
ldp q16, q17, [x1] /* Q4 */
ldp q18, q19, [x1, #16]
b extend_hfa_type_store_4
nop
ldp q16, q17, [x1] /* Q3 */
ldr q18, [x1, #16]
b extend_hfa_type_store_3
nop
ldp q16, q17, [x1] /* Q2 */
b extend_hfa_type_store_2
nop
nop
ldr q16, [x1] /* Q1 */
b extend_hfa_type_store_1
extend_hfa_type_store_4
str q19, [x0, #48]
extend_hfa_type_store_3
str q18, [x0, #32]
extend_hfa_type_store_2
str q17, [x0, #16]
extend_hfa_type_store_1
str q16, [x0]
ret
LEAF_END extend_hfa_type
/* void compress_hfa_type (void *dest, void *reg, int h) */
LEAF_ENTRY compress_hfa_type
adr x3, compress_hfa_type_jump_base
and w2, w2, #AARCH64_RET_MASK
sub x2, x2, #AARCH64_RET_S4
add x3, x3, x2, lsl #4
br x3
ALIGN 4
compress_hfa_type_jump_base
ldp q16, q17, [x1] /* S4 */
ldp q18, q19, [x1, #32]
st4 { v16.s, v17.s, v18.s, v19.s }[0], [x0]
ret
ldp q16, q17, [x1] /* S3 */
ldr q18, [x1, #32]
st3 { v16.s, v17.s, v18.s }[0], [x0]
ret
ldp q16, q17, [x1] /* S2 */
st2 { v16.s, v17.s }[0], [x0]
ret
nop
ldr q16, [x1] /* S1 */
st1 { v16.s }[0], [x0]
ret
nop
ldp q16, q17, [x1] /* D4 */
ldp q18, q19, [x1, #32]
st4 { v16.d, v17.d, v18.d, v19.d }[0], [x0]
ret
ldp q16, q17, [x1] /* D3 */
ldr q18, [x1, #32]
st3 { v16.d, v17.d, v18.d }[0], [x0]
ret
ldp q16, q17, [x1] /* D2 */
st2 { v16.d, v17.d }[0], [x0]
ret
nop
ldr q16, [x1] /* D1 */
st1 { v16.d }[0], [x0]
ret
nop
ldp q16, q17, [x1] /* Q4 */
ldp q18, q19, [x1, #32]
b compress_hfa_type_store_q4
nop
ldp q16, q17, [x1] /* Q3 */
ldr q18, [x1, #32]
b compress_hfa_type_store_q3
nop
ldp q16, q17, [x1] /* Q2 */
stp q16, q17, [x0]
ret
nop
ldr q16, [x1] /* Q1 */
str q16, [x0]
ret
compress_hfa_type_store_q4
str q19, [x0, #48]
compress_hfa_type_store_q3
str q18, [x0, #32]
stp q16, q17, [x0]
ret
LEAF_END compress_hfa_type
END
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