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/* -----------------------------------------------------------------------
n32.S - Copyright (c) 1996, 1998, 2005, 2007, 2009, 2010 Red Hat, Inc.
MIPS 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>
/* Only build this code if we are compiling for n32 */
#if defined(FFI_MIPS_N32)
#define callback a0
#define bytes a2
#define flags a3
#define raddr a4
#define fn a5
#define SIZEOF_FRAME ( 8 * FFI_SIZEOF_ARG )
#ifdef __GNUC__
.abicalls
#endif
.set mips4
.text
.align 2
.globl ffi_call_N32
.ent ffi_call_N32
ffi_call_N32:
.LFB3:
.frame $fp, SIZEOF_FRAME, ra
.mask 0xc0000000,-FFI_SIZEOF_ARG
.fmask 0x00000000,0
# Prologue
SUBU $sp, SIZEOF_FRAME # Frame size
.LCFI0:
REG_S $fp, SIZEOF_FRAME - 2*FFI_SIZEOF_ARG($sp) # Save frame pointer
REG_S ra, SIZEOF_FRAME - 1*FFI_SIZEOF_ARG($sp) # Save return address
.LCFI1:
move $fp, $sp
.LCFI3:
move t9, callback # callback function pointer
REG_S bytes, 2*FFI_SIZEOF_ARG($fp) # bytes
REG_S flags, 3*FFI_SIZEOF_ARG($fp) # flags
REG_S raddr, 4*FFI_SIZEOF_ARG($fp) # raddr
REG_S fn, 5*FFI_SIZEOF_ARG($fp) # fn
# Allocate at least 4 words in the argstack
move v0, bytes
bge bytes, 4 * FFI_SIZEOF_ARG, bigger
LI v0, 4 * FFI_SIZEOF_ARG
b sixteen
bigger:
ADDU t4, v0, 2 * FFI_SIZEOF_ARG -1 # make sure it is aligned
and v0, t4, -2 * FFI_SIZEOF_ARG # to a proper boundry.
sixteen:
SUBU $sp, $sp, v0 # move the stack pointer to reflect the
# arg space
move a0, $sp # 4 * FFI_SIZEOF_ARG
ADDU a3, $fp, 3 * FFI_SIZEOF_ARG
# Call ffi_prep_args
jal t9
# Copy the stack pointer to t9
move t9, $sp
# Fix the stack if there are more than 8 64bit slots worth
# of arguments.
# Load the number of bytes
REG_L t6, 2*FFI_SIZEOF_ARG($fp)
# Is it bigger than 8 * FFI_SIZEOF_ARG?
daddiu t8, t6, -(8 * FFI_SIZEOF_ARG)
bltz t8, loadregs
ADDU t9, t9, t8
loadregs:
REG_L t6, 3*FFI_SIZEOF_ARG($fp) # load the flags word into t6.
and t4, t6, ((1<<FFI_FLAG_BITS)-1)
REG_L a0, 0*FFI_SIZEOF_ARG(t9)
beqz t4, arg1_next
bne t4, FFI_TYPE_FLOAT, arg1_doublep
l.s $f12, 0*FFI_SIZEOF_ARG(t9)
b arg1_next
arg1_doublep:
l.d $f12, 0*FFI_SIZEOF_ARG(t9)
arg1_next:
SRL t4, t6, 1*FFI_FLAG_BITS
and t4, ((1<<FFI_FLAG_BITS)-1)
REG_L a1, 1*FFI_SIZEOF_ARG(t9)
beqz t4, arg2_next
bne t4, FFI_TYPE_FLOAT, arg2_doublep
l.s $f13, 1*FFI_SIZEOF_ARG(t9)
b arg2_next
arg2_doublep:
l.d $f13, 1*FFI_SIZEOF_ARG(t9)
arg2_next:
SRL t4, t6, 2*FFI_FLAG_BITS
and t4, ((1<<FFI_FLAG_BITS)-1)
REG_L a2, 2*FFI_SIZEOF_ARG(t9)
beqz t4, arg3_next
bne t4, FFI_TYPE_FLOAT, arg3_doublep
l.s $f14, 2*FFI_SIZEOF_ARG(t9)
b arg3_next
arg3_doublep:
l.d $f14, 2*FFI_SIZEOF_ARG(t9)
arg3_next:
SRL t4, t6, 3*FFI_FLAG_BITS
and t4, ((1<<FFI_FLAG_BITS)-1)
REG_L a3, 3*FFI_SIZEOF_ARG(t9)
beqz t4, arg4_next
bne t4, FFI_TYPE_FLOAT, arg4_doublep
l.s $f15, 3*FFI_SIZEOF_ARG(t9)
b arg4_next
arg4_doublep:
l.d $f15, 3*FFI_SIZEOF_ARG(t9)
arg4_next:
SRL t4, t6, 4*FFI_FLAG_BITS
and t4, ((1<<FFI_FLAG_BITS)-1)
REG_L a4, 4*FFI_SIZEOF_ARG(t9)
beqz t4, arg5_next
bne t4, FFI_TYPE_FLOAT, arg5_doublep
l.s $f16, 4*FFI_SIZEOF_ARG(t9)
b arg5_next
arg5_doublep:
l.d $f16, 4*FFI_SIZEOF_ARG(t9)
arg5_next:
SRL t4, t6, 5*FFI_FLAG_BITS
and t4, ((1<<FFI_FLAG_BITS)-1)
REG_L a5, 5*FFI_SIZEOF_ARG(t9)
beqz t4, arg6_next
bne t4, FFI_TYPE_FLOAT, arg6_doublep
l.s $f17, 5*FFI_SIZEOF_ARG(t9)
b arg6_next
arg6_doublep:
l.d $f17, 5*FFI_SIZEOF_ARG(t9)
arg6_next:
SRL t4, t6, 6*FFI_FLAG_BITS
and t4, ((1<<FFI_FLAG_BITS)-1)
REG_L a6, 6*FFI_SIZEOF_ARG(t9)
beqz t4, arg7_next
bne t4, FFI_TYPE_FLOAT, arg7_doublep
l.s $f18, 6*FFI_SIZEOF_ARG(t9)
b arg7_next
arg7_doublep:
l.d $f18, 6*FFI_SIZEOF_ARG(t9)
arg7_next:
SRL t4, t6, 7*FFI_FLAG_BITS
and t4, ((1<<FFI_FLAG_BITS)-1)
REG_L a7, 7*FFI_SIZEOF_ARG(t9)
beqz t4, arg8_next
bne t4, FFI_TYPE_FLOAT, arg8_doublep
l.s $f19, 7*FFI_SIZEOF_ARG(t9)
b arg8_next
arg8_doublep:
l.d $f19, 7*FFI_SIZEOF_ARG(t9)
arg8_next:
callit:
# Load the function pointer
REG_L t9, 5*FFI_SIZEOF_ARG($fp)
# If the return value pointer is NULL, assume no return value.
REG_L t5, 4*FFI_SIZEOF_ARG($fp)
beqz t5, noretval
# Shift the return type flag over
SRL t6, 8*FFI_FLAG_BITS
beq t6, FFI_TYPE_SINT32, retint
bne t6, FFI_TYPE_INT, retfloat
retint:
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
REG_S v0, 0(t4)
b epilogue
retfloat:
bne t6, FFI_TYPE_FLOAT, retdouble
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
s.s $f0, 0(t4)
b epilogue
retdouble:
bne t6, FFI_TYPE_DOUBLE, retstruct_d
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
s.d $f0, 0(t4)
b epilogue
retstruct_d:
bne t6, FFI_TYPE_STRUCT_D, retstruct_f
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
s.d $f0, 0(t4)
b epilogue
retstruct_f:
bne t6, FFI_TYPE_STRUCT_F, retstruct_d_d
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
s.s $f0, 0(t4)
b epilogue
retstruct_d_d:
bne t6, FFI_TYPE_STRUCT_DD, retstruct_f_f
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
s.d $f0, 0(t4)
s.d $f2, 8(t4)
b epilogue
retstruct_f_f:
bne t6, FFI_TYPE_STRUCT_FF, retstruct_d_f
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
s.s $f0, 0(t4)
s.s $f2, 4(t4)
b epilogue
retstruct_d_f:
bne t6, FFI_TYPE_STRUCT_DF, retstruct_f_d
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
s.d $f0, 0(t4)
s.s $f2, 8(t4)
b epilogue
retstruct_f_d:
bne t6, FFI_TYPE_STRUCT_FD, retstruct_d_soft
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
s.s $f0, 0(t4)
s.d $f2, 8(t4)
b epilogue
retstruct_d_soft:
bne t6, FFI_TYPE_STRUCT_D_SOFT, retstruct_f_soft
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
sd v0, 0(t4)
b epilogue
retstruct_f_soft:
bne t6, FFI_TYPE_STRUCT_F_SOFT, retstruct_d_d_soft
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
sw v0, 0(t4)
b epilogue
retstruct_d_d_soft:
bne t6, FFI_TYPE_STRUCT_DD_SOFT, retstruct_f_f_soft
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
sd v0, 0(t4)
sd v1, 8(t4)
b epilogue
retstruct_f_f_soft:
bne t6, FFI_TYPE_STRUCT_FF_SOFT, retstruct_d_f_soft
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
sw v0, 0(t4)
sw v1, 4(t4)
b epilogue
retstruct_d_f_soft:
bne t6, FFI_TYPE_STRUCT_DF_SOFT, retstruct_f_d_soft
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
sd v0, 0(t4)
sw v1, 8(t4)
b epilogue
retstruct_f_d_soft:
bne t6, FFI_TYPE_STRUCT_FD_SOFT, retstruct_small
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
sw v0, 0(t4)
sd v1, 8(t4)
b epilogue
retstruct_small:
bne t6, FFI_TYPE_STRUCT_SMALL, retstruct_small2
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
REG_S v0, 0(t4)
b epilogue
retstruct_small2:
bne t6, FFI_TYPE_STRUCT_SMALL2, retstruct
jal t9
REG_L t4, 4*FFI_SIZEOF_ARG($fp)
REG_S v0, 0(t4)
REG_S v1, 8(t4)
b epilogue
retstruct:
noretval:
jal t9
# Epilogue
epilogue:
move $sp, $fp
REG_L $fp, SIZEOF_FRAME - 2*FFI_SIZEOF_ARG($sp) # Restore frame pointer
REG_L ra, SIZEOF_FRAME - 1*FFI_SIZEOF_ARG($sp) # Restore return address
ADDU $sp, SIZEOF_FRAME # Fix stack pointer
j ra
.LFE3:
.end ffi_call_N32
/* ffi_closure_N32. Expects address of the passed-in ffi_closure in t0
($12). Stores any arguments passed in registers onto the stack,
then calls ffi_closure_mips_inner_N32, which then decodes
them.
Stack layout:
20 - Start of parameters, original sp
19 - Called function a7 save
18 - Called function a6 save
17 - Called function a5 save
16 - Called function a4 save
15 - Called function a3 save
14 - Called function a2 save
13 - Called function a1 save
12 - Called function a0 save
11 - Called function f19
10 - Called function f18
9 - Called function f17
8 - Called function f16
7 - Called function f15
6 - Called function f14
5 - Called function f13
4 - Called function f12
3 - return value high (v1 or $f2)
2 - return value low (v0 or $f0)
1 - ra save
0 - gp save our sp points here
*/
#define SIZEOF_FRAME2 (20 * FFI_SIZEOF_ARG)
#define A7_OFF2 (19 * FFI_SIZEOF_ARG)
#define A6_OFF2 (18 * FFI_SIZEOF_ARG)
#define A5_OFF2 (17 * FFI_SIZEOF_ARG)
#define A4_OFF2 (16 * FFI_SIZEOF_ARG)
#define A3_OFF2 (15 * FFI_SIZEOF_ARG)
#define A2_OFF2 (14 * FFI_SIZEOF_ARG)
#define A1_OFF2 (13 * FFI_SIZEOF_ARG)
#define A0_OFF2 (12 * FFI_SIZEOF_ARG)
#define F19_OFF2 (11 * FFI_SIZEOF_ARG)
#define F18_OFF2 (10 * FFI_SIZEOF_ARG)
#define F17_OFF2 (9 * FFI_SIZEOF_ARG)
#define F16_OFF2 (8 * FFI_SIZEOF_ARG)
#define F15_OFF2 (7 * FFI_SIZEOF_ARG)
#define F14_OFF2 (6 * FFI_SIZEOF_ARG)
#define F13_OFF2 (5 * FFI_SIZEOF_ARG)
#define F12_OFF2 (4 * FFI_SIZEOF_ARG)
#define V1_OFF2 (3 * FFI_SIZEOF_ARG)
#define V0_OFF2 (2 * FFI_SIZEOF_ARG)
#define RA_OFF2 (1 * FFI_SIZEOF_ARG)
#define GP_OFF2 (0 * FFI_SIZEOF_ARG)
.align 2
.globl ffi_closure_N32
.ent ffi_closure_N32
ffi_closure_N32:
.LFB2:
.frame $sp, SIZEOF_FRAME2, ra
.mask 0x90000000,-(SIZEOF_FRAME2 - RA_OFF2)
.fmask 0x00000000,0
SUBU $sp, SIZEOF_FRAME2
.LCFI5:
.cpsetup t9, GP_OFF2, ffi_closure_N32
REG_S ra, RA_OFF2($sp) # Save return address
.LCFI6:
# Store all possible argument registers. If there are more than
# fit in registers, then they were stored on the stack.
REG_S a0, A0_OFF2($sp)
REG_S a1, A1_OFF2($sp)
REG_S a2, A2_OFF2($sp)
REG_S a3, A3_OFF2($sp)
REG_S a4, A4_OFF2($sp)
REG_S a5, A5_OFF2($sp)
REG_S a6, A6_OFF2($sp)
REG_S a7, A7_OFF2($sp)
# Store all possible float/double registers.
s.d $f12, F12_OFF2($sp)
s.d $f13, F13_OFF2($sp)
s.d $f14, F14_OFF2($sp)
s.d $f15, F15_OFF2($sp)
s.d $f16, F16_OFF2($sp)
s.d $f17, F17_OFF2($sp)
s.d $f18, F18_OFF2($sp)
s.d $f19, F19_OFF2($sp)
# Call ffi_closure_mips_inner_N32 to do the real work.
LA t9, ffi_closure_mips_inner_N32
move a0, $12 # Pointer to the ffi_closure
ADDU a1, $sp, V0_OFF2
ADDU a2, $sp, A0_OFF2
ADDU a3, $sp, F12_OFF2
jalr t9
# Return flags are in v0
bne v0, FFI_TYPE_SINT32, cls_retint
lw v0, V0_OFF2($sp)
b cls_epilogue
cls_retint:
bne v0, FFI_TYPE_INT, cls_retfloat
REG_L v0, V0_OFF2($sp)
b cls_epilogue
cls_retfloat:
bne v0, FFI_TYPE_FLOAT, cls_retdouble
l.s $f0, V0_OFF2($sp)
b cls_epilogue
cls_retdouble:
bne v0, FFI_TYPE_DOUBLE, cls_retstruct_d
l.d $f0, V0_OFF2($sp)
b cls_epilogue
cls_retstruct_d:
bne v0, FFI_TYPE_STRUCT_D, cls_retstruct_f
l.d $f0, V0_OFF2($sp)
b cls_epilogue
cls_retstruct_f:
bne v0, FFI_TYPE_STRUCT_F, cls_retstruct_d_d
l.s $f0, V0_OFF2($sp)
b cls_epilogue
cls_retstruct_d_d:
bne v0, FFI_TYPE_STRUCT_DD, cls_retstruct_f_f
l.d $f0, V0_OFF2($sp)
l.d $f2, V1_OFF2($sp)
b cls_epilogue
cls_retstruct_f_f:
bne v0, FFI_TYPE_STRUCT_FF, cls_retstruct_d_f
l.s $f0, V0_OFF2($sp)
l.s $f2, V1_OFF2($sp)
b cls_epilogue
cls_retstruct_d_f:
bne v0, FFI_TYPE_STRUCT_DF, cls_retstruct_f_d
l.d $f0, V0_OFF2($sp)
l.s $f2, V1_OFF2($sp)
b cls_epilogue
cls_retstruct_f_d:
bne v0, FFI_TYPE_STRUCT_FD, cls_retstruct_small2
l.s $f0, V0_OFF2($sp)
l.d $f2, V1_OFF2($sp)
b cls_epilogue
cls_retstruct_small2:
REG_L v0, V0_OFF2($sp)
REG_L v1, V1_OFF2($sp)
# Epilogue
cls_epilogue:
REG_L ra, RA_OFF2($sp) # Restore return address
.cpreturn
ADDU $sp, SIZEOF_FRAME2
j ra
.LFE2:
.end ffi_closure_N32
#ifdef __GNUC__
.section .eh_frame,"aw",@progbits
.Lframe1:
.4byte .LECIE1-.LSCIE1 # length
.LSCIE1:
.4byte 0x0 # CIE
.byte 0x1 # Version 1
.ascii "\000" # Augmentation
.uleb128 0x1 # Code alignment 1
.sleb128 -4 # Data alignment -4
.byte 0x1f # Return Address $31
.byte 0xc # DW_CFA_def_cfa
.uleb128 0x1d # in $sp
.uleb128 0x0 # offset 0
.align EH_FRAME_ALIGN
.LECIE1:
.LSFDE1:
.4byte .LEFDE1-.LASFDE1 # length.
.LASFDE1:
.4byte .LASFDE1-.Lframe1 # CIE_pointer.
FDE_ADDR_BYTES .LFB3 # initial_location.
FDE_ADDR_BYTES .LFE3-.LFB3 # address_range.
.byte 0x4 # DW_CFA_advance_loc4
.4byte .LCFI0-.LFB3 # to .LCFI0
.byte 0xe # DW_CFA_def_cfa_offset
.uleb128 SIZEOF_FRAME # adjust stack.by SIZEOF_FRAME
.byte 0x4 # DW_CFA_advance_loc4
.4byte .LCFI1-.LCFI0 # to .LCFI1
.byte 0x9e # DW_CFA_offset of $fp
.uleb128 2*FFI_SIZEOF_ARG/4 #
.byte 0x9f # DW_CFA_offset of ra
.uleb128 1*FFI_SIZEOF_ARG/4 #
.byte 0x4 # DW_CFA_advance_loc4
.4byte .LCFI3-.LCFI1 # to .LCFI3
.byte 0xd # DW_CFA_def_cfa_register
.uleb128 0x1e # in $fp
.align EH_FRAME_ALIGN
.LEFDE1:
.LSFDE3:
.4byte .LEFDE3-.LASFDE3 # length
.LASFDE3:
.4byte .LASFDE3-.Lframe1 # CIE_pointer.
FDE_ADDR_BYTES .LFB2 # initial_location.
FDE_ADDR_BYTES .LFE2-.LFB2 # address_range.
.byte 0x4 # DW_CFA_advance_loc4
.4byte .LCFI5-.LFB2 # to .LCFI5
.byte 0xe # DW_CFA_def_cfa_offset
.uleb128 SIZEOF_FRAME2 # adjust stack.by SIZEOF_FRAME
.byte 0x4 # DW_CFA_advance_loc4
.4byte .LCFI6-.LCFI5 # to .LCFI6
.byte 0x9c # DW_CFA_offset of $gp ($28)
.uleb128 (SIZEOF_FRAME2 - GP_OFF2)/4
.byte 0x9f # DW_CFA_offset of ra ($31)
.uleb128 (SIZEOF_FRAME2 - RA_OFF2)/4
.align EH_FRAME_ALIGN
.LEFDE3:
#endif /* __GNUC__ */
#endif
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