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/* -----------------------------------------------------------------------
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>
.text
#ifndef __s390x__
# r2: frame
# r3: ret_type
# r4: ret_addr
# r5: fun
# r6: closure
# This assumes we are using gas.
.balign 8
.globl ffi_call_SYSV
FFI_HIDDEN(ffi_call_SYSV)
.type ffi_call_SYSV,%function
ffi_call_SYSV:
.cfi_startproc
st %r6,44(%r2) # Save registers
stm %r12,%r14,48(%r2)
lr %r13,%r2 # Install frame pointer
.cfi_rel_offset r6, 44
.cfi_rel_offset r12, 48
.cfi_rel_offset r13, 52
.cfi_rel_offset r14, 56
.cfi_def_cfa_register r13
st %r2,0(%r15) # Set up back chain
sla %r3,3 # ret_type *= 8
lr %r12,%r4 # Save ret_addr
lr %r1,%r5 # Save fun
lr %r0,%r6 # Install static chain
# Set return address, so that there is only one indirect jump.
#ifdef HAVE_AS_S390_ZARCH
larl %r14,.Ltable
ar %r14,%r3
#else
basr %r14,0
0: la %r14,.Ltable-0b(%r14,%r3)
#endif
lm %r2,%r6,8(%r13) # Load arguments
ld %f0,64(%r13)
ld %f2,72(%r13)
br %r1 # ... and call function
.balign 8
.Ltable:
# FFI390_RET_DOUBLE
std %f0,0(%r12)
j .Ldone
.balign 8
# FFI390_RET_FLOAT
ste %f0,0(%r12)
j .Ldone
.balign 8
# FFI390_RET_INT64
st %r3,4(%r12)
nop
# fallthru
.balign 8
# FFI390_RET_INT32
st %r2,0(%r12)
nop
# fallthru
.balign 8
# FFI390_RET_VOID
.Ldone:
l %r14,56(%r13)
l %r12,48(%r13)
l %r6,44(%r13)
l %r13,52(%r13)
.cfi_restore 14
.cfi_restore 13
.cfi_restore 12
.cfi_restore 6
.cfi_def_cfa r15, 96
br %r14
.cfi_endproc
.size ffi_call_SYSV,.-ffi_call_SYSV
.balign 8
.globl ffi_go_closure_SYSV
FFI_HIDDEN(ffi_go_closure_SYSV)
.type ffi_go_closure_SYSV,%function
ffi_go_closure_SYSV:
.cfi_startproc
stm %r2,%r6,8(%r15) # Save arguments
lr %r4,%r0 # Load closure -> user_data
l %r2,4(%r4) # ->cif
l %r3,8(%r4) # ->fun
j .Ldoclosure
.cfi_endproc
.balign 8
.globl ffi_closure_SYSV
FFI_HIDDEN(ffi_closure_SYSV)
.type ffi_closure_SYSV,%function
ffi_closure_SYSV:
.cfi_startproc
stm %r2,%r6,8(%r15) # Save arguments
lr %r4,%r0 # Closure
l %r2,16(%r4) # ->cif
l %r3,20(%r4) # ->fun
l %r4,24(%r4) # ->user_data
.Ldoclosure:
stm %r12,%r15,48(%r15) # Save registers
lr %r12,%r15
.cfi_def_cfa_register r12
.cfi_rel_offset r6, 24
.cfi_rel_offset r12, 48
.cfi_rel_offset r13, 52
.cfi_rel_offset r14, 56
.cfi_rel_offset r15, 60
#ifndef HAVE_AS_S390_ZARCH
basr %r13,0 # Set up base register
.Lcbase:
l %r1,.Lchelper-.Lcbase(%r13) # Get helper function
#endif
ahi %r15,-96-8 # Set up stack frame
st %r12,0(%r15) # Set up back chain
std %f0,64(%r12) # Save fp arguments
std %f2,72(%r12)
la %r5,96(%r12) # Overflow
st %r5,96(%r15)
la %r6,64(%r12) # FPRs
la %r5,8(%r12) # GPRs
#ifdef HAVE_AS_S390_ZARCH
brasl %r14,ffi_closure_helper_SYSV
#else
bas %r14,0(%r1,%r13) # Call helper
#endif
lr %r15,%r12
.cfi_def_cfa_register r15
lm %r12,%r14,48(%r12) # Restore saved registers
l %r6,24(%r15)
ld %f0,64(%r15) # Load return registers
lm %r2,%r3,8(%r15)
br %r14
.cfi_endproc
#ifndef HAVE_AS_S390_ZARCH
.align 4
.Lchelper:
.long ffi_closure_helper_SYSV-.Lcbase
#endif
.size ffi_closure_SYSV,.-ffi_closure_SYSV
#else
# r2: frame
# r3: ret_type
# r4: ret_addr
# r5: fun
# r6: closure
# This assumes we are using gas.
.balign 8
.globl ffi_call_SYSV
FFI_HIDDEN(ffi_call_SYSV)
.type ffi_call_SYSV,%function
ffi_call_SYSV:
.cfi_startproc
stg %r6,88(%r2) # Save registers
stmg %r12,%r14,96(%r2)
lgr %r13,%r2 # Install frame pointer
.cfi_rel_offset r6, 88
.cfi_rel_offset r12, 96
.cfi_rel_offset r13, 104
.cfi_rel_offset r14, 112
.cfi_def_cfa_register r13
stg %r2,0(%r15) # Set up back chain
larl %r14,.Ltable # Set up return address
slag %r3,%r3,3 # ret_type *= 8
lgr %r12,%r4 # Save ret_addr
lgr %r1,%r5 # Save fun
lgr %r0,%r6 # Install static chain
agr %r14,%r3
lmg %r2,%r6,16(%r13) # Load arguments
ld %f0,128(%r13)
ld %f2,136(%r13)
ld %f4,144(%r13)
ld %f6,152(%r13)
br %r1 # ... and call function
.balign 8
.Ltable:
# FFI390_RET_DOUBLE
std %f0,0(%r12)
j .Ldone
.balign 8
# FFI390_RET_DOUBLE
ste %f0,0(%r12)
j .Ldone
.balign 8
# FFI390_RET_INT64
stg %r2,0(%r12)
.balign 8
# FFI390_RET_INT32
# Never used, as we always store type ffi_arg.
# But the stg above is 6 bytes and we cannot
# jump around this case, so fall through.
nop
nop
.balign 8
# FFI390_RET_VOID
.Ldone:
lg %r14,112(%r13)
lg %r12,96(%r13)
lg %r6,88(%r13)
lg %r13,104(%r13)
.cfi_restore r14
.cfi_restore r13
.cfi_restore r12
.cfi_restore r6
.cfi_def_cfa r15, 160
br %r14
.cfi_endproc
.size ffi_call_SYSV,.-ffi_call_SYSV
.balign 8
.globl ffi_go_closure_SYSV
FFI_HIDDEN(ffi_go_closure_SYSV)
.type ffi_go_closure_SYSV,%function
ffi_go_closure_SYSV:
.cfi_startproc
stmg %r2,%r6,16(%r15) # Save arguments
lgr %r4,%r0 # Load closure -> user_data
lg %r2,8(%r4) # ->cif
lg %r3,16(%r4) # ->fun
j .Ldoclosure
.cfi_endproc
.size ffi_go_closure_SYSV,.-ffi_go_closure_SYSV
.balign 8
.globl ffi_closure_SYSV
FFI_HIDDEN(ffi_closure_SYSV)
.type ffi_closure_SYSV,%function
ffi_closure_SYSV:
.cfi_startproc
stmg %r2,%r6,16(%r15) # Save arguments
lgr %r4,%r0 # Load closure
lg %r2,32(%r4) # ->cif
lg %r3,40(%r4) # ->fun
lg %r4,48(%r4) # ->user_data
.Ldoclosure:
stmg %r13,%r15,104(%r15) # Save registers
lgr %r13,%r15
.cfi_def_cfa_register r13
.cfi_rel_offset r6, 48
.cfi_rel_offset r13, 104
.cfi_rel_offset r14, 112
.cfi_rel_offset r15, 120
aghi %r15,-160-16 # Set up stack frame
stg %r13,0(%r15) # Set up back chain
std %f0,128(%r13) # Save fp arguments
std %f2,136(%r13)
std %f4,144(%r13)
std %f6,152(%r13)
la %r5,160(%r13) # Overflow
stg %r5,160(%r15)
la %r6,128(%r13) # FPRs
la %r5,16(%r13) # GPRs
brasl %r14,ffi_closure_helper_SYSV # Call helper
lgr %r15,%r13
.cfi_def_cfa_register r15
lmg %r13,%r14,104(%r13) # Restore saved registers
lg %r6,48(%r15)
ld %f0,128(%r15) # Load return registers
lg %r2,16(%r15)
br %r14
.cfi_endproc
.size ffi_closure_SYSV,.-ffi_closure_SYSV
#endif /* !s390x */
#if defined __ELF__ && defined __linux__
.section .note.GNU-stack,"",@progbits
#endif
|
