-----------------------------------------------------------------------
sysv.S - Copyright (c) 2000 Software AG
         Copyright (c) 2008 Red Hat, Inc.

S390 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>

ifndef s390x

.text

# r2:   cif->bytes
# r3:   &ecif
# r4:   ffi_prep_args
# r5:   ret_type
# r6:   ecif.rvalue
# ov:   fn 

# This assumes we are using gas.
.globl  ffi_call_SYSV
.type   ffi_call_SYSV,%function

ffi_call_SYSV: .LFB1:

stm     %r6,%r15,24(%r15)               # Save registers

.LCFI0:

basr    %r13,0                          # Set up base register

.Lbase:

lr      %r11,%r15                       # Set up frame pointer

.LCFI1:

sr      %r15,%r2
ahi     %r15,-96-48                     # Allocate stack
lr      %r8,%r6                         # Save ecif.rvalue
sr      %r9,%r9
ic      %r9,.Ltable-.Lbase(%r13,%r5)    # Load epilog address
l       %r7,96(%r11)                    # Load function address
st      %r11,0(%r15)                    # Set up back chain
ahi     %r11,-48                        # Register save area

.LCFI2:

la      %r2,96(%r15)                    # Save area
                                        # r3 already holds &ecif
basr    %r14,%r4                        # Call ffi_prep_args

lm      %r2,%r6,0(%r11)                 # Load arguments
ld      %f0,32(%r11)
ld      %f2,40(%r11)
la      %r14,0(%r13,%r9)                # Set return address
br      %r7                             # ... and call function

.LretNone: # Return void

l       %r4,48+56(%r11)
lm      %r6,%r15,48+24(%r11)
br      %r4

.LretFloat:

l       %r4,48+56(%r11)
ste     %f0,0(%r8)                      # Return float
lm      %r6,%r15,48+24(%r11)
br      %r4

.LretDouble:

l       %r4,48+56(%r11)
std     %f0,0(%r8)                      # Return double
lm      %r6,%r15,48+24(%r11)
br      %r4

.LretInt32:

l       %r4,48+56(%r11)
st      %r2,0(%r8)                      # Return int
lm      %r6,%r15,48+24(%r11)
br      %r4

.LretInt64:

l       %r4,48+56(%r11)
stm     %r2,%r3,0(%r8)                  # Return long long
lm      %r6,%r15,48+24(%r11)
br      %r4

.Ltable:

.byte   .LretNone-.Lbase                # FFI390_RET_VOID
.byte   .LretNone-.Lbase                # FFI390_RET_STRUCT
.byte   .LretFloat-.Lbase               # FFI390_RET_FLOAT
.byte   .LretDouble-.Lbase              # FFI390_RET_DOUBLE
.byte   .LretInt32-.Lbase               # FFI390_RET_INT32
.byte   .LretInt64-.Lbase               # FFI390_RET_INT64

.LFE1: .ffi_call_SYSV_end:

.size    ffi_call_SYSV,.ffi_call_SYSV_end-ffi_call_SYSV

.globl  ffi_closure_SYSV
.type   ffi_closure_SYSV,%function

ffi_closure_SYSV: .LFB2:

stm     %r12,%r15,48(%r15)              # Save registers

.LCFI10:

basr    %r13,0                          # Set up base register

.Lcbase:

stm     %r2,%r6,8(%r15)                 # Save arguments
std     %f0,64(%r15)
std     %f2,72(%r15)
lr      %r1,%r15                        # Set up stack frame
ahi     %r15,-96

.LCFI11:

l       %r12,.Lchelper-.Lcbase(%r13)    # Get helper function
lr      %r2,%r0                         # Closure
la      %r3,8(%r1)                      # GPRs
la      %r4,64(%r1)                     # FPRs
la      %r5,96(%r1)                     # Overflow
st      %r1,0(%r15)                     # Set up back chain

bas     %r14,0(%r12,%r13)               # Call helper

l       %r4,96+56(%r15)
ld      %f0,96+64(%r15)                 # Load return registers
lm      %r2,%r3,96+8(%r15)
lm      %r12,%r15,96+48(%r15)
br      %r4

.align 4

.Lchelper:

.long   ffi_closure_helper_SYSV-.Lcbase

.LFE2:

.ffi_closure_SYSV_end:

.size    ffi_closure_SYSV,.ffi_closure_SYSV_end-ffi_closure_SYSV

.section        .eh_frame,EH_FRAME_FLAGS,@progbits

.Lframe1:

.4byte  .LECIE1-.LSCIE1 # Length of Common Information Entry

.LSCIE1:

.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   0xe     # CIE RA Column
.uleb128 0x1    # Augmentation size
.byte   0x1b    # FDE Encoding (pcrel sdata4)
.byte   0xc     # DW_CFA_def_cfa
.uleb128 0xf
.uleb128 0x60
.align  4

.LECIE1: .LSFDE1:

.4byte  .LEFDE1-.LASFDE1        # FDE Length

.LASFDE1:

.4byte  .LASFDE1-.Lframe1       # 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  .LCFI0-.LFB1
.byte   0x8f    # DW_CFA_offset, column 0xf
.uleb128 0x9
.byte   0x8e    # DW_CFA_offset, column 0xe
.uleb128 0xa
.byte   0x8d    # DW_CFA_offset, column 0xd
.uleb128 0xb
.byte   0x8c    # DW_CFA_offset, column 0xc
.uleb128 0xc
.byte   0x8b    # DW_CFA_offset, column 0xb
.uleb128 0xd
.byte   0x8a    # DW_CFA_offset, column 0xa
.uleb128 0xe
.byte   0x89    # DW_CFA_offset, column 0x9
.uleb128 0xf
.byte   0x88    # DW_CFA_offset, column 0x8
.uleb128 0x10
.byte   0x87    # DW_CFA_offset, column 0x7
.uleb128 0x11
.byte   0x86    # DW_CFA_offset, column 0x6
.uleb128 0x12
.byte   0x4     # DW_CFA_advance_loc4
.4byte  .LCFI1-.LCFI0
.byte   0xd     # DW_CFA_def_cfa_register
.uleb128 0xb
.byte   0x4     # DW_CFA_advance_loc4
.4byte  .LCFI2-.LCFI1
.byte   0xe     # DW_CFA_def_cfa_offset
.uleb128 0x90
.align  4

.LEFDE1: .LSFDE2:

.4byte  .LEFDE2-.LASFDE2        # FDE Length

.LASFDE2:

.4byte  .LASFDE2-.Lframe1       # 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  .LCFI10-.LFB2
.byte   0x8f    # DW_CFA_offset, column 0xf
.uleb128 0x9
.byte   0x8e    # DW_CFA_offset, column 0xe
.uleb128 0xa
.byte   0x8d    # DW_CFA_offset, column 0xd
.uleb128 0xb
.byte   0x8c    # DW_CFA_offset, column 0xc
.uleb128 0xc
.byte   0x4     # DW_CFA_advance_loc4
.4byte  .LCFI11-.LCFI10
.byte   0xe     # DW_CFA_def_cfa_offset
.uleb128 0xc0
.align  4

.LEFDE2:

else

.text

# r2:   cif->bytes
# r3:   &ecif
# r4:   ffi_prep_args
# r5:   ret_type
# r6:   ecif.rvalue
# ov:   fn 

# This assumes we are using gas.
.globl  ffi_call_SYSV
.type   ffi_call_SYSV,%function

ffi_call_SYSV: .LFB1:

stmg    %r6,%r15,48(%r15)               # Save registers

.LCFI0:

larl    %r13,.Lbase                     # Set up base register
lgr     %r11,%r15                       # Set up frame pointer

.LCFI1:

sgr     %r15,%r2
aghi    %r15,-160-80                    # Allocate stack
lgr     %r8,%r6                         # Save ecif.rvalue
llgc    %r9,.Ltable-.Lbase(%r13,%r5)    # Load epilog address
lg      %r7,160(%r11)                   # Load function address
stg     %r11,0(%r15)                    # Set up back chain
aghi    %r11,-80                        # Register save area

.LCFI2:

la      %r2,160(%r15)                   # Save area
                                        # r3 already holds &ecif
basr    %r14,%r4                        # Call ffi_prep_args

lmg     %r2,%r6,0(%r11)                 # Load arguments
ld      %f0,48(%r11)
ld      %f2,56(%r11)
ld      %f4,64(%r11)
ld      %f6,72(%r11)
la      %r14,0(%r13,%r9)                # Set return address
br      %r7                             # ... and call function

.Lbase: .LretNone: # Return void

lg      %r4,80+112(%r11)
lmg     %r6,%r15,80+48(%r11)
br      %r4

.LretFloat:

lg      %r4,80+112(%r11)
ste     %f0,0(%r8)                      # Return float
lmg     %r6,%r15,80+48(%r11)
br      %r4

.LretDouble:

lg      %r4,80+112(%r11)
std     %f0,0(%r8)                      # Return double
lmg     %r6,%r15,80+48(%r11)
br      %r4

.LretInt32:

lg      %r4,80+112(%r11)
st      %r2,0(%r8)                      # Return int
lmg     %r6,%r15,80+48(%r11)
br      %r4

.LretInt64:

lg      %r4,80+112(%r11)
stg     %r2,0(%r8)                      # Return long
lmg     %r6,%r15,80+48(%r11)
br      %r4

.Ltable:

.byte   .LretNone-.Lbase                # FFI390_RET_VOID
.byte   .LretNone-.Lbase                # FFI390_RET_STRUCT
.byte   .LretFloat-.Lbase               # FFI390_RET_FLOAT
.byte   .LretDouble-.Lbase              # FFI390_RET_DOUBLE
.byte   .LretInt32-.Lbase               # FFI390_RET_INT32
.byte   .LretInt64-.Lbase               # FFI390_RET_INT64

.LFE1: .ffi_call_SYSV_end:

.size    ffi_call_SYSV,.ffi_call_SYSV_end-ffi_call_SYSV

.globl  ffi_closure_SYSV
.type   ffi_closure_SYSV,%function

ffi_closure_SYSV: .LFB2:

stmg    %r14,%r15,112(%r15)             # Save registers

.LCFI10:

stmg    %r2,%r6,16(%r15)                # Save arguments
std     %f0,128(%r15)
std     %f2,136(%r15)
std     %f4,144(%r15)
std     %f6,152(%r15)
lgr     %r1,%r15                        # Set up stack frame
aghi    %r15,-160

.LCFI11:

lgr     %r2,%r0                         # Closure
la      %r3,16(%r1)                     # GPRs
la      %r4,128(%r1)                    # FPRs
la      %r5,160(%r1)                    # Overflow
stg     %r1,0(%r15)                     # Set up back chain

brasl   %r14,ffi_closure_helper_SYSV    # Call helper

lg      %r14,160+112(%r15)
ld      %f0,160+128(%r15)               # Load return registers
lg      %r2,160+16(%r15)
la      %r15,160(%r15)
br      %r14

.LFE2:

.ffi_closure_SYSV_end:

.size    ffi_closure_SYSV,.ffi_closure_SYSV_end-ffi_closure_SYSV

.section        .eh_frame,EH_FRAME_FLAGS,@progbits

.Lframe1:

.4byte  .LECIE1-.LSCIE1 # Length of Common Information Entry

.LSCIE1:

.4byte  0x0     # CIE Identifier Tag
.byte   0x1     # CIE Version
.ascii "zR\0"   # CIE Augmentation
.uleb128 0x1    # CIE Code Alignment Factor
.sleb128 -8     # CIE Data Alignment Factor
.byte   0xe     # CIE RA Column
.uleb128 0x1    # Augmentation size
.byte   0x1b    # FDE Encoding (pcrel sdata4)
.byte   0xc     # DW_CFA_def_cfa
.uleb128 0xf
.uleb128 0xa0
.align  8

.LECIE1: .LSFDE1:

.4byte  .LEFDE1-.LASFDE1        # FDE Length

.LASFDE1:

.4byte  .LASFDE1-.Lframe1       # 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  .LCFI0-.LFB1
.byte   0x8f    # DW_CFA_offset, column 0xf
.uleb128 0x5
.byte   0x8e    # DW_CFA_offset, column 0xe
.uleb128 0x6
.byte   0x8d    # DW_CFA_offset, column 0xd
.uleb128 0x7
.byte   0x8c    # DW_CFA_offset, column 0xc
.uleb128 0x8
.byte   0x8b    # DW_CFA_offset, column 0xb
.uleb128 0x9
.byte   0x8a    # DW_CFA_offset, column 0xa
.uleb128 0xa
.byte   0x89    # DW_CFA_offset, column 0x9
.uleb128 0xb
.byte   0x88    # DW_CFA_offset, column 0x8
.uleb128 0xc
.byte   0x87    # DW_CFA_offset, column 0x7
.uleb128 0xd
.byte   0x86    # DW_CFA_offset, column 0x6
.uleb128 0xe
.byte   0x4     # DW_CFA_advance_loc4
.4byte  .LCFI1-.LCFI0
.byte   0xd     # DW_CFA_def_cfa_register
.uleb128 0xb
.byte   0x4     # DW_CFA_advance_loc4
.4byte  .LCFI2-.LCFI1
.byte   0xe     # DW_CFA_def_cfa_offset
.uleb128 0xf0
.align  8

.LEFDE1: .LSFDE2:

.4byte  .LEFDE2-.LASFDE2        # FDE Length

.LASFDE2:

.4byte  .LASFDE2-.Lframe1       # 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  .LCFI10-.LFB2
.byte   0x8f    # DW_CFA_offset, column 0xf
.uleb128 0x5
.byte   0x8e    # DW_CFA_offset, column 0xe
.uleb128 0x6
.byte   0x4     # DW_CFA_advance_loc4
.4byte  .LCFI11-.LCFI10
.byte   0xe     # DW_CFA_def_cfa_offset
.uleb128 0x140
.align  8

.LEFDE2:

endif

if defined __ELF__ && defined __linux__

.section        .note.GNU-stack,"",@progbits

endif