/* ----------------------------------------------------------------------- win32.S - Copyright (c) 1996, 1998, 2001, 2002 Red Hat, Inc. Copyright (c) 2001 John Beniton Copyright (c) 2002 Ranjit Mathew X86 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 CYGNUS SOLUTIONS 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 .globl ffi_prep_args # This assumes we are using gas. .balign 16 .globl _ffi_call_SYSV _ffi_call_SYSV: pushl %ebp movl %esp,%ebp # Make room for all of the new args. movl 16(%ebp),%ecx subl %ecx,%esp movl %esp,%eax # Place all of the ffi_prep_args in position pushl 12(%ebp) pushl %eax call *8(%ebp) # Return stack to previous state and call the function addl $8,%esp # FIXME: Align the stack to a 128-bit boundary to avoid # potential performance hits. call *28(%ebp) # Remove the space we pushed for the args movl 16(%ebp),%ecx addl %ecx,%esp # Load %ecx with the return type code movl 20(%ebp),%ecx # If the return value pointer is NULL, assume no return value. cmpl $0,24(%ebp) jne retint # Even if there is no space for the return value, we are # obliged to handle floating-point values. cmpl $FFI_TYPE_FLOAT,%ecx jne noretval fstp %st(0) jmp epilogue retint: cmpl $FFI_TYPE_INT,%ecx jne retfloat # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx movl %eax,0(%ecx) jmp epilogue retfloat: cmpl $FFI_TYPE_FLOAT,%ecx jne retdouble # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx fstps (%ecx) jmp epilogue retdouble: cmpl $FFI_TYPE_DOUBLE,%ecx jne retlongdouble # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx fstpl (%ecx) jmp epilogue retlongdouble: cmpl $FFI_TYPE_LONGDOUBLE,%ecx jne retint64 # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx fstpt (%ecx) jmp epilogue retint64: cmpl $FFI_TYPE_SINT64,%ecx jne retstruct1b # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx movl %eax,0(%ecx) movl %edx,4(%ecx) retstruct1b: cmpl $FFI_TYPE_SINT8,%ecx jne retstruct2b # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx movb %al,0(%ecx) jmp epilogue retstruct2b: cmpl $FFI_TYPE_SINT16,%ecx jne retstruct # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx movw %ax,0(%ecx) jmp epilogue retstruct: # Nothing to do! noretval: epilogue: movl %ebp,%esp popl %ebp ret .ffi_call_SYSV_end: # This assumes we are using gas. .balign 16 .globl _ffi_call_STDCALL _ffi_call_STDCALL: pushl %ebp movl %esp,%ebp # Make room for all of the new args. movl 16(%ebp),%ecx subl %ecx,%esp movl %esp,%eax # Place all of the ffi_prep_args in position pushl 12(%ebp) pushl %eax call *8(%ebp) # Return stack to previous state and call the function addl $8,%esp # FIXME: Align the stack to a 128-bit boundary to avoid # potential performance hits. call *28(%ebp) # stdcall functions pop arguments off the stack themselves # Load %ecx with the return type code movl 20(%ebp),%ecx # If the return value pointer is NULL, assume no return value. cmpl $0,24(%ebp) jne sc_retint # Even if there is no space for the return value, we are # obliged to handle floating-point values. cmpl $FFI_TYPE_FLOAT,%ecx jne sc_noretval fstp %st(0) jmp sc_epilogue sc_retint: cmpl $FFI_TYPE_INT,%ecx jne sc_retfloat # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx movl %eax,0(%ecx) jmp sc_epilogue sc_retfloat: cmpl $FFI_TYPE_FLOAT,%ecx jne sc_retdouble # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx fstps (%ecx) jmp sc_epilogue sc_retdouble: cmpl $FFI_TYPE_DOUBLE,%ecx jne sc_retlongdouble # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx fstpl (%ecx) jmp sc_epilogue sc_retlongdouble: cmpl $FFI_TYPE_LONGDOUBLE,%ecx jne sc_retint64 # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx fstpt (%ecx) jmp sc_epilogue sc_retint64: cmpl $FFI_TYPE_SINT64,%ecx jne sc_retstruct1b # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx movl %eax,0(%ecx) movl %edx,4(%ecx) sc_retstruct1b: cmpl $FFI_TYPE_SINT8,%ecx jne sc_retstruct2b # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx movb %al,0(%ecx) jmp sc_epilogue sc_retstruct2b: cmpl $FFI_TYPE_SINT16,%ecx jne sc_retstruct # Load %ecx with the pointer to storage for the return value movl 24(%ebp),%ecx movw %ax,0(%ecx) jmp sc_epilogue sc_retstruct: # Nothing to do! sc_noretval: sc_epilogue: movl %ebp,%esp popl %ebp ret .ffi_call_STDCALL_end: .globl _ffi_closure_SYSV _ffi_closure_SYSV: pushl %ebp movl %esp, %ebp subl $40, %esp leal -24(%ebp), %edx movl %edx, -12(%ebp) /* resp */ leal 8(%ebp), %edx movl %edx, 4(%esp) /* args = __builtin_dwarf_cfa () */ leal -12(%ebp), %edx movl %edx, (%esp) /* &resp */ call _ffi_closure_SYSV_inner movl -12(%ebp), %ecx cmpl $FFI_TYPE_INT, %eax je .Lcls_retint cmpl $FFI_TYPE_FLOAT, %eax je .Lcls_retfloat cmpl $FFI_TYPE_DOUBLE, %eax je .Lcls_retdouble cmpl $FFI_TYPE_LONGDOUBLE, %eax je .Lcls_retldouble cmpl $FFI_TYPE_SINT64, %eax je .Lcls_retllong cmpl $FFI_TYPE_SINT8, %eax /* 1-byte struct */ je .Lcls_retstruct1 cmpl $FFI_TYPE_SINT16, %eax /* 2-bytes struct */ je .Lcls_retstruct2 .Lcls_epilogue: movl %ebp, %esp popl %ebp ret .Lcls_retint: movl (%ecx), %eax jmp .Lcls_epilogue .Lcls_retfloat: flds (%ecx) jmp .Lcls_epilogue .Lcls_retdouble: fldl (%ecx) jmp .Lcls_epilogue .Lcls_retldouble: fldt (%ecx) jmp .Lcls_epilogue .Lcls_retllong: movl (%ecx), %eax movl 4(%ecx), %edx jmp .Lcls_epilogue .Lcls_retstruct1: movsbl (%ecx), %eax jmp .Lcls_epilogue .Lcls_retstruct2: movswl (%ecx), %eax jmp .Lcls_epilogue .ffi_closure_SYSV_end: #if !FFI_NO_RAW_API #define RAW_CLOSURE_CIF_OFFSET ((FFI_TRAMPOLINE_SIZE + 3) & ~3) #define RAW_CLOSURE_FUN_OFFSET (RAW_CLOSURE_CIF_OFFSET + 4) #define RAW_CLOSURE_USER_DATA_OFFSET (RAW_CLOSURE_FUN_OFFSET + 4) #define CIF_FLAGS_OFFSET 20 .balign 16 .globl _ffi_closure_raw_SYSV _ffi_closure_raw_SYSV: pushl %ebp movl %esp, %ebp pushl %esi subl $36, %esp movl RAW_CLOSURE_CIF_OFFSET(%eax), %esi /* closure->cif */ movl RAW_CLOSURE_USER_DATA_OFFSET(%eax), %edx /* closure->user_data */ movl %edx, 12(%esp) /* user_data */ leal 8(%ebp), %edx /* __builtin_dwarf_cfa () */ movl %edx, 8(%esp) /* raw_args */ leal -24(%ebp), %edx movl %edx, 4(%esp) /* &res */ movl %esi, (%esp) /* cif */ call *RAW_CLOSURE_FUN_OFFSET(%eax) /* closure->fun */ movl CIF_FLAGS_OFFSET(%esi), %eax /* rtype */ cmpl $FFI_TYPE_INT, %eax je .Lrcls_retint cmpl $FFI_TYPE_FLOAT, %eax je .Lrcls_retfloat cmpl $FFI_TYPE_DOUBLE, %eax je .Lrcls_retdouble cmpl $FFI_TYPE_LONGDOUBLE, %eax je .Lrcls_retldouble cmpl $FFI_TYPE_SINT64, %eax je .Lrcls_retllong .Lrcls_epilogue: addl $36, %esp popl %esi popl %ebp ret .Lrcls_retint: movl -24(%ebp), %eax jmp .Lrcls_epilogue .Lrcls_retfloat: flds -24(%ebp) jmp .Lrcls_epilogue .Lrcls_retdouble: fldl -24(%ebp) jmp .Lrcls_epilogue .Lrcls_retldouble: fldt -24(%ebp) jmp .Lrcls_epilogue .Lrcls_retllong: movl -24(%ebp), %eax movl -20(%ebp), %edx jmp .Lrcls_epilogue .ffi_closure_raw_SYSV_end: #endif