/* ———————————————————————–
o32.S - Copyright (c) 1996, 1998, 2005 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 o32 */
if defined(FFI_MIPS_O32)
define callback a0 define bytes a2 define flags a3
define SIZEOF_FRAME (4 * FFI_SIZEOF_ARG + 2 * FFI_SIZEOF_ARG) define A3_OFF (SIZEOF_FRAME + 3 * FFI_SIZEOF_ARG) define FP_OFF (SIZEOF_FRAME - 2 * FFI_SIZEOF_ARG) define RA_OFF (SIZEOF_FRAME - 1 * FFI_SIZEOF_ARG)
.abicalls .text .align 2 .globl ffi_call_O32 .ent ffi_call_O32
ffi_call_O32:
$LFB0:
# Prologue SUBU $sp, SIZEOF_FRAME # Frame size
$LCFI00:
REG_S $fp, FP_OFF($sp) # Save frame pointer
$LCFI01:
REG_S ra, RA_OFF($sp) # Save return address
$LCFI02:
move $fp, $sp
$LCFI03:
move t9, callback # callback function pointer REG_S flags, A3_OFF($fp) # flags # Allocate at least 4 words in the argstack LI v0, 4 * FFI_SIZEOF_ARG blt bytes, v0, sixteen ADDU v0, bytes, 7 # make sure it is aligned and v0, -8 # to an 8 byte boundry
sixteen:
SUBU $sp, v0 # move the stack pointer to reflect the
# arg space
ADDU a0, $sp, 4 * FFI_SIZEOF_ARG
jalr t9
REG_L t0, A3_OFF($fp) # load the flags word
SRL t2, t0, 4 # shift our arg info
and t0, ((1<<4)-1) # mask out the return type
ADDU $sp, 4 * FFI_SIZEOF_ARG # adjust $sp to new args
ifndef __mips_soft_float
bnez t0, pass_d # make it quick for int
endif
REG_L a0, 0*FFI_SIZEOF_ARG($sp) # just go ahead and load the REG_L a1, 1*FFI_SIZEOF_ARG($sp) # four regs. REG_L a2, 2*FFI_SIZEOF_ARG($sp) REG_L a3, 3*FFI_SIZEOF_ARG($sp) b call_it
ifndef __mips_soft_float pass_d:
bne t0, FFI_ARGS_D, pass_f l.d $f12, 0*FFI_SIZEOF_ARG($sp) # load $fp regs from args REG_L a2, 2*FFI_SIZEOF_ARG($sp) # passing a double REG_L a3, 3*FFI_SIZEOF_ARG($sp) b call_it
pass_f:
bne t0, FFI_ARGS_F, pass_d_d l.s $f12, 0*FFI_SIZEOF_ARG($sp) # load $fp regs from args REG_L a1, 1*FFI_SIZEOF_ARG($sp) # passing a float REG_L a2, 2*FFI_SIZEOF_ARG($sp) REG_L a3, 3*FFI_SIZEOF_ARG($sp) b call_it
pass_d_d:
bne t0, FFI_ARGS_DD, pass_f_f l.d $f12, 0*FFI_SIZEOF_ARG($sp) # load $fp regs from args l.d $f14, 2*FFI_SIZEOF_ARG($sp) # passing two doubles b call_it
pass_f_f:
bne t0, FFI_ARGS_FF, pass_d_f l.s $f12, 0*FFI_SIZEOF_ARG($sp) # load $fp regs from args l.s $f14, 1*FFI_SIZEOF_ARG($sp) # passing two floats REG_L a2, 2*FFI_SIZEOF_ARG($sp) REG_L a3, 3*FFI_SIZEOF_ARG($sp) b call_it
pass_d_f:
bne t0, FFI_ARGS_DF, pass_f_d l.d $f12, 0*FFI_SIZEOF_ARG($sp) # load $fp regs from args l.s $f14, 2*FFI_SIZEOF_ARG($sp) # passing double and float REG_L a3, 3*FFI_SIZEOF_ARG($sp) b call_it
pass_f_d:
# assume that the only other combination must be float then double # bne t0, FFI_ARGS_F_D, call_it l.s $f12, 0*FFI_SIZEOF_ARG($sp) # load $fp regs from args l.d $f14, 2*FFI_SIZEOF_ARG($sp) # passing double and float
endif
call_it:
# Load the static chain pointer REG_L t7, SIZEOF_FRAME + 6*FFI_SIZEOF_ARG($fp) # Load the function pointer REG_L t9, SIZEOF_FRAME + 5*FFI_SIZEOF_ARG($fp) # If the return value pointer is NULL, assume no return value. REG_L t1, SIZEOF_FRAME + 4*FFI_SIZEOF_ARG($fp) beqz t1, noretval and t1, t2, ((1<<4)-1) bne t1, FFI_TYPE_INT, retlonglong jalr t9 REG_L t0, SIZEOF_FRAME + 4*FFI_SIZEOF_ARG($fp) REG_S v0, 0(t0) b epilogue
retlonglong:
# Really any 64-bit int, signed or not. bne t1, FFI_TYPE_UINT64, retfloat jalr t9 REG_L t0, SIZEOF_FRAME + 4*FFI_SIZEOF_ARG($fp) REG_S v1, 4(t0) REG_S v0, 0(t0) b epilogue
retfloat:
bne t1, FFI_TYPE_FLOAT, retdouble jalr t9 REG_L t0, SIZEOF_FRAME + 4*FFI_SIZEOF_ARG($fp)
ifndef __mips_soft_float
s.s $f0, 0(t0)
else
REG_S v0, 0(t0)
endif
b epilogue
retdouble:
bne t1, FFI_TYPE_DOUBLE, retcomplex jalr t9 REG_L t0, SIZEOF_FRAME + 4*FFI_SIZEOF_ARG($fp)
ifndef __mips_soft_float
s.d $f0, 0(t0)
else
REG_S v1, 4(t0) REG_S v0, 0(t0)
endif
b epilogue
retcomplex:
# mask out the complex elements type. # the struct of flags (bits): # 0-1: arg0 # 2-3: arg1 # 4-7: return type # 8-11: rtype elements type: for complex # Note here: t2 is flags>>4 bne t1, FFI_TYPE_COMPLEX, noretval jalr t9 REG_L t0, SIZEOF_FRAME + 4*FFI_SIZEOF_ARG($fp) REG_L t1, A3_OFF($fp) # load the flags word SRL t1, t1, 8 li t3, 3 beq t1, t3, 3f # double li t3, 2 beq t1, t3, 2f # float # FIXME: long double slti t3, t1, 5 beqz t3, 5f # (u)int8/16/32/64
2: ifndef __mips_soft_float
s.s $f0, 0(t0) s.s $f2, 4(t0)
else
# FIXME: do nothing can pass all of the testsuite
endif
b epilogue
3: ifndef __mips_soft_float
s.d $f0, 0(t0) s.d $f2, 8(t0)
else
# FIXME: do nothing can pass all of the testsuite
endif
b epilogue
5:
REG_S v1, 4(t0) REG_S v0, 0(t0) b epilogue
noretval:
jalr t9 # Epilogue
epilogue:
move $sp, $fp REG_L $fp, FP_OFF($sp) # Restore frame pointer REG_L ra, RA_OFF($sp) # Restore return address ADDU $sp, SIZEOF_FRAME # Fix stack pointer j ra
$LFE0:
.end ffi_call_O32
/* ffi_closure_O32. Expects address of the passed-in ffi_closure
in t4 ($12). Stores any arguments passed in registers onto the stack, then calls ffi_closure_mips_inner_O32, which then decodes them. Stack layout: 3 - a3 save 2 - a2 save 1 - a1 save 0 - a0 save, original sp -1 - ra save -2 - fp save -3 - $16 (s0) save -4 - cprestore -5 - return value high (v1) -6 - return value low (v0) -7 - f14 (le high, be low) -8 - f14 (le low, be high) -9 - f12 (le high, be low) -10 - f12 (le low, be high) -11 - Called function a5 save -12 - Called function a4 save -13 - Called function a3 save -14 - Called function a2 save -15 - Called function a1 save -16 - Called function a0 save, our sp and fp point here */
define SIZEOF_FRAME2 (16 * FFI_SIZEOF_ARG) define A3_OFF2 (SIZEOF_FRAME2 + 3 * FFI_SIZEOF_ARG) define A2_OFF2 (SIZEOF_FRAME2 + 2 * FFI_SIZEOF_ARG) define A1_OFF2 (SIZEOF_FRAME2 + 1 * FFI_SIZEOF_ARG) define A0_OFF2 (SIZEOF_FRAME2 + 0 * FFI_SIZEOF_ARG) define RA_OFF2 (SIZEOF_FRAME2 - 1 * FFI_SIZEOF_ARG) define FP_OFF2 (SIZEOF_FRAME2 - 2 * FFI_SIZEOF_ARG) define S0_OFF2 (SIZEOF_FRAME2 - 3 * FFI_SIZEOF_ARG) define GP_OFF2 (SIZEOF_FRAME2 - 4 * FFI_SIZEOF_ARG) define V1_OFF2 (SIZEOF_FRAME2 - 5 * FFI_SIZEOF_ARG) define V0_OFF2 (SIZEOF_FRAME2 - 6 * FFI_SIZEOF_ARG) define FA_1_1_OFF2 (SIZEOF_FRAME2 - 7 * FFI_SIZEOF_ARG) define FA_1_0_OFF2 (SIZEOF_FRAME2 - 8 * FFI_SIZEOF_ARG) define FA_0_1_OFF2 (SIZEOF_FRAME2 - 9 * FFI_SIZEOF_ARG) define FA_0_0_OFF2 (SIZEOF_FRAME2 - 10 * FFI_SIZEOF_ARG) define CALLED_A5_OFF2 (SIZEOF_FRAME2 - 11 * FFI_SIZEOF_ARG) define CALLED_A4_OFF2 (SIZEOF_FRAME2 - 12 * FFI_SIZEOF_ARG)
.text .align 2 .globl ffi_go_closure_O32 .ent ffi_go_closure_O32
ffi_go_closure_O32: $LFB1:
# Prologue .frame $fp, SIZEOF_FRAME2, ra .set noreorder .cpload t9 .set reorder SUBU $sp, SIZEOF_FRAME2 .cprestore GP_OFF2
$LCFI10:
REG_S $16, S0_OFF2($sp) # Save s0 REG_S $fp, FP_OFF2($sp) # Save frame pointer REG_S ra, RA_OFF2($sp) # Save return address
$LCFI11:
move $fp, $sp
$LCFI12:
REG_S a0, A0_OFF2($fp) REG_S a1, A1_OFF2($fp) REG_S a2, A2_OFF2($fp) REG_S a3, A3_OFF2($fp) # Load ABI enum to s0 REG_L $16, 4($15) # cif REG_L $16, 0($16) # abi is first member. li $13, 1 # FFI_O32 bne $16, $13, 1f # Skip fp save if FFI_O32_SOFT_FLOAT
ifndef __mips_soft_float
# Store all possible float/double registers. s.d $f12, FA_0_0_OFF2($fp) s.d $f14, FA_1_0_OFF2($fp)
endif 1:
# prepare arguments for ffi_closure_mips_inner_O32 REG_L a0, 4($15) # cif REG_L a1, 8($15) # fun move a2, $15 # user_data = go closure addu a3, $fp, V0_OFF2 # rvalue addu t9, $fp, A0_OFF2 # ar REG_S t9, CALLED_A4_OFF2($fp) addu t9, $fp, FA_0_0_OFF2 #fpr REG_S t9, CALLED_A5_OFF2($fp) b $do_closure
$LFE1:
.end ffi_go_closure_O32 .align 2 .globl ffi_closure_O32 .ent ffi_closure_O32
ffi_closure_O32: $LFB2:
# Prologue .frame $fp, SIZEOF_FRAME2, ra .set noreorder .cpload t9 .set reorder SUBU $sp, SIZEOF_FRAME2 .cprestore GP_OFF2
$LCFI20:
REG_S $16, S0_OFF2($sp) # Save s0 REG_S $fp, FP_OFF2($sp) # Save frame pointer REG_S ra, RA_OFF2($sp) # Save return address
$LCFI21:
move $fp, $sp
$LCFI22:
# Store all possible argument registers. If there are more than # four arguments, then they are stored above where we put a3. REG_S a0, A0_OFF2($fp) REG_S a1, A1_OFF2($fp) REG_S a2, A2_OFF2($fp) REG_S a3, A3_OFF2($fp) # Load ABI enum to s0 REG_L $16, 20($12) # cif pointer follows tramp. REG_L $16, 0($16) # abi is first member. li $13, 1 # FFI_O32 bne $16, $13, 1f # Skip fp save if FFI_O32_SOFT_FLOAT
ifndef __mips_soft_float
# Store all possible float/double registers. s.d $f12, FA_0_0_OFF2($fp) s.d $f14, FA_1_0_OFF2($fp)
endif 1:
# prepare arguments for ffi_closure_mips_inner_O32 REG_L a0, 20($12) # cif pointer follows tramp. REG_L a1, 24($12) # fun REG_L a2, 28($12) # user_data addu a3, $fp, V0_OFF2 # rvalue addu t9, $fp, A0_OFF2 # ar REG_S t9, CALLED_A4_OFF2($fp) addu t9, $fp, FA_0_0_OFF2 #fpr REG_S t9, CALLED_A5_OFF2($fp)
$do_closure:
la t9, ffi_closure_mips_inner_O32 # Call ffi_closure_mips_inner_O32 to do the work. jalr t9 # Load the return value into the appropriate register. move $8, $2 li $9, FFI_TYPE_VOID beq $8, $9, closure_done li $13, 1 # FFI_O32 bne $16, $13, 1f # Skip fp restore if FFI_O32_SOFT_FLOAT
ifndef __mips_soft_float
li $9, FFI_TYPE_FLOAT l.s $f0, V0_OFF2($fp) beq $8, $9, closure_done li $9, FFI_TYPE_DOUBLE l.d $f0, V0_OFF2($fp) beq $8, $9, closure_done li $9, FFI_TYPE_COMPLEX bne $8, $9, 1f li $9, 8 l.s $f0, V0_OFF2($fp) l.s $f2, V1_OFF2($fp) beq $3, $9, closure_done li $9, 16 l.d $f0, V0_OFF2($fp) l.d $f2, (V0_OFF2+8)($fp) beq $3, $9, closure_done
endif 1:
REG_L $3, V1_OFF2($fp) REG_L $2, V0_OFF2($fp)
closure_done:
# Epilogue move $sp, $fp REG_L $16, S0_OFF2($sp) # Restore s0 REG_L $fp, FP_OFF2($sp) # Restore frame pointer REG_L ra, RA_OFF2($sp) # Restore return address ADDU $sp, SIZEOF_FRAME2 j ra
$LFE2:
.end ffi_closure_O32
/* DWARF-2 unwind info. */
.section .eh_frame,"a",@progbits
$Lframe0:
.4byte $LECIE0-$LSCIE0 # Length of Common Information Entry
$LSCIE0:
.4byte 0x0 # CIE Identifier Tag .byte 0x1 # CIE Version .ascii "zR\0" # CIE Augmentation .uleb128 0x1 # CIE Code Alignment Factor .sleb128 4 # CIE Data Alignment Factor .byte 0x1f # CIE RA Column .uleb128 0x1 # Augmentation size .byte 0x00 # FDE Encoding (absptr) .byte 0xc # DW_CFA_def_cfa .uleb128 0x1d .uleb128 0x0 .align 2
$LECIE0:
$LSFDE0:
.4byte $LEFDE0-$LASFDE0 # FDE Length
$LASFDE0:
.4byte $LASFDE0-$Lframe0 # FDE CIE offset .4byte $LFB0 # FDE initial location .4byte $LFE0-$LFB0 # FDE address range .uleb128 0x0 # Augmentation size .byte 0x4 # DW_CFA_advance_loc4 .4byte $LCFI00-$LFB0 .byte 0xe # DW_CFA_def_cfa_offset .uleb128 0x18 .byte 0x4 # DW_CFA_advance_loc4 .4byte $LCFI01-$LCFI00 .byte 0x11 # DW_CFA_offset_extended_sf .uleb128 0x1e # $fp .sleb128 -2 # SIZEOF_FRAME2 - 2*FFI_SIZEOF_ARG($sp) .byte 0x11 # DW_CFA_offset_extended_sf .uleb128 0x1f # $ra .sleb128 -1 # SIZEOF_FRAME2 - 1*FFI_SIZEOF_ARG($sp) .byte 0x4 # DW_CFA_advance_loc4 .4byte $LCFI02-$LCFI01 .byte 0xc # DW_CFA_def_cfa .uleb128 0x1e .uleb128 0x18 .align 2
$LEFDE0:
$LSFDE1:
.4byte $LEFDE1-$LASFDE1 # FDE Length
$LASFDE1:
.4byte $LASFDE1-$Lframe0 # FDE CIE offset .4byte $LFB1 # FDE initial location .4byte $LFE1-$LFB1 # FDE address range .uleb128 0x0 # Augmentation size .byte 0x4 # DW_CFA_advance_loc4 .4byte $LCFI10-$LFB1 .byte 0xe # DW_CFA_def_cfa_offset .uleb128 SIZEOF_FRAME2 .byte 0x4 # DW_CFA_advance_loc4 .4byte $LCFI11-$LCFI10 .byte 0x11 # DW_CFA_offset_extended_sf .uleb128 0x10 # $16 .sleb128 -3 # SIZEOF_FRAME2 - 3*FFI_SIZEOF_ARG($sp) .byte 0x11 # DW_CFA_offset_extended_sf .uleb128 0x1e # $fp .sleb128 -2 # SIZEOF_FRAME2 - 2*FFI_SIZEOF_ARG($sp) .byte 0x11 # DW_CFA_offset_extended_sf .uleb128 0x1f # $ra .sleb128 -1 # SIZEOF_FRAME2 - 1*FFI_SIZEOF_ARG($sp) .byte 0x4 # DW_CFA_advance_loc4 .4byte $LCFI12-$LCFI11 .byte 0xc # DW_CFA_def_cfa .uleb128 0x1e .uleb128 SIZEOF_FRAME2 .align 2
$LEFDE1:
$LSFDE2:
.4byte $LEFDE2-$LASFDE2 # FDE Length
$LASFDE2:
.4byte $LASFDE2-$Lframe0 # FDE CIE offset .4byte $LFB2 # FDE initial location .4byte $LFE2-$LFB2 # FDE address range .uleb128 0x0 # Augmentation size .byte 0x4 # DW_CFA_advance_loc4 .4byte $LCFI20-$LFB2 .byte 0xe # DW_CFA_def_cfa_offset .uleb128 SIZEOF_FRAME2 .byte 0x4 # DW_CFA_advance_loc4 .4byte $LCFI21-$LCFI20 .byte 0x11 # DW_CFA_offset_extended_sf .uleb128 0x10 # $16 .sleb128 -3 # SIZEOF_FRAME2 - 3*FFI_SIZEOF_ARG($sp) .byte 0x11 # DW_CFA_offset_extended_sf .uleb128 0x1e # $fp .sleb128 -2 # SIZEOF_FRAME2 - 2*FFI_SIZEOF_ARG($sp) .byte 0x11 # DW_CFA_offset_extended_sf .uleb128 0x1f # $ra .sleb128 -1 # SIZEOF_FRAME2 - 1*FFI_SIZEOF_ARG($sp) .byte 0x4 # DW_CFA_advance_loc4 .4byte $LCFI22-$LCFI21 .byte 0xc # DW_CFA_def_cfa .uleb128 0x1e .uleb128 SIZEOF_FRAME2 .align 2
$LEFDE2:
endif
if defined __ELF__ && defined __linux__
.section .note.GNU-stack,"",%progbits
endif