kc3-lang/libffi/src/pa/hpux32.S

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• Hash : 8eb2d2b0
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  Date : 2020-02-24T10:29:20
  

  Revamp PA_LINUX and PA_HPUX target closures to use function descriptors. 2020-02-23 John David Anglin <danglin@gcc.gnu.org> * include/ffi.h.in (FFI_CLOSURE_PTR, FFI_RESTORE_PTR): Define. * src/closures.c (ffi_closure_alloc): Convert closure pointer return by malloc to function pointer. (ffi_closure_free): Convert function pointer back to malloc pointer. * src/pa/ffi.c (ffi_closure_inner_pa32): Use union to double word align return address on stack. Adjust statements referencing return address. Convert closure argument from function pointer to standard closure pointer. (ffi_prep_closure_loc): Likewise convert closure argument back to closure pointer. Remove assembler trampolines. Setup simulated function descriptor as on ia64. src/pa/ffitarget.h (FFI_TRAMPOLINE_SIZE): Reduce to 12. src/pa/hpux32.S (ffi_closure_pa32): Retrieve closure pointer and real gp from fake gp value in register %r19. src/pa/linux.S (ffi_closure_pa32): Likewise.

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• src/pa/hpux32.S

• /* -----------------------------------------------------------------------
     hpux32.S - Copyright (c) 2006 Free Software Foundation, Inc.
  	                (c) 2008 Red Hat, Inc.
     based on src/pa/linux.S
  
     HP-UX PA 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 AUTHOR 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>
  
  	.LEVEL 1.1
  	.SPACE	$PRIVATE$
  	.IMPORT	$global$,DATA
  	.IMPORT	$$dyncall,MILLICODE
  	.SUBSPA	$DATA$
  	.align	4
  
  	/* void ffi_call_pa32(void (*)(char *, extended_cif *),
  			       extended_cif *ecif,
  			       unsigned bytes,
  			       unsigned flags,
  			       unsigned *rvalue,
  			       void (*fn)(void));
  	 */
  
  	.export	ffi_call_pa32,ENTRY,PRIV_LEV=3
  	.import	ffi_prep_args_pa32,CODE
  
  	.SPACE	$TEXT$
  	.SUBSPA $CODE$
  	.align	4
  
  L$FB1
  ffi_call_pa32
  	.proc
  	.callinfo	FRAME=64,CALLS,SAVE_RP,SAVE_SP,ENTRY_GR=4
  	.entry
  	stw	%rp, -20(%sp)
  	copy	%r3, %r1
  L$CFI11
  	copy	%sp, %r3
  L$CFI12
  
  	/* Setup the stack for calling prep_args...
  	   We want the stack to look like this:
  
  	   [ Previous stack                            ] <- %r3
  
  	   [ 64-bytes register save area               ] <- %r4
  
  	   [ Stack space for actual call, passed as    ] <- %arg0
  	   [     arg0 to ffi_prep_args_pa32           ]
  
  	   [ Stack for calling prep_args               ] <- %sp
  	 */
  
  	stwm	%r1, 64(%sp)
  	stw	%r4, 12(%r3)
  L$CFI13
  	copy	%sp, %r4
  
  	addl	%arg2, %r4, %arg0	; arg stack
  	stw	%arg3, -48(%r3)		; save flags we need it later
  
  	/* Call prep_args:
  	   %arg0(stack) -- set up above
  	   %arg1(ecif)  -- same as incoming param
  	   %arg2(bytes) -- same as incoming param */
  	bl	ffi_prep_args_pa32,%r2
  	ldo	64(%arg0), %sp
  	ldo	-64(%sp), %sp
  
  	/* now %sp should point where %arg0 was pointing.  */
  
  	/* Load the arguments that should be passed in registers
  	   The fp args are loaded by the prep_args function.  */
  	ldw	-36(%sp), %arg0
  	ldw	-40(%sp), %arg1
  	ldw	-44(%sp), %arg2
  	ldw	-48(%sp), %arg3
  
  	/* in case the function is going to return a structure
  	   we need to give it a place to put the result.  */
  	ldw	-52(%r3), %ret0		; %ret0 <- rvalue
  	ldw	-56(%r3), %r22		; %r22 <- function to call
  	bl	$$dyncall, %r31		; Call the user function
  	copy	%r31, %rp
  
  	/* Prepare to store the result; we need to recover flags and rvalue.  */
  	ldw	-48(%r3), %r21		; r21 <- flags
  	ldw	-52(%r3), %r20		; r20 <- rvalue
  
  	/* Store the result according to the return type.  The most
  	   likely types should come first.  */
  
  L$checkint
  	comib,<>,n FFI_TYPE_INT, %r21, L$checkint8
  	b	L$done
  	stw	%ret0, 0(%r20)
  
  L$checkint8
  	comib,<>,n FFI_TYPE_UINT8, %r21, L$checkint16
  	b	L$done
  	stb	%ret0, 0(%r20)
  
  L$checkint16
  	comib,<>,n FFI_TYPE_UINT16, %r21, L$checkdbl
  	b	L$done
  	sth	%ret0, 0(%r20)
  
  L$checkdbl
  	comib,<>,n FFI_TYPE_DOUBLE, %r21, L$checkfloat
  	b	L$done
  	fstd	%fr4,0(%r20)
  
  L$checkfloat
  	comib,<>,n FFI_TYPE_FLOAT, %r21, L$checkll
  	b	L$done
  	fstw	%fr4L,0(%r20)
  
  L$checkll
  	comib,<>,n FFI_TYPE_UINT64, %r21, L$checksmst2
  	stw	%ret0, 0(%r20)
  	b	L$done
  	stw	%ret1, 4(%r20)
  
  L$checksmst2
  	comib,<>,n FFI_TYPE_SMALL_STRUCT2, %r21, L$checksmst3
  	/* 2-byte structs are returned in ret0 as ????xxyy.  */
  	extru	%ret0, 23, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	b	L$done
  	stb	%ret0, 0(%r20)
  
  L$checksmst3
  	comib,<>,n FFI_TYPE_SMALL_STRUCT3, %r21, L$checksmst4
  	/* 3-byte structs are returned in ret0 as ??xxyyzz.  */
  	extru	%ret0, 15, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret0, 23, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	b	L$done
  	stb	%ret0, 0(%r20)
  
  L$checksmst4
  	comib,<>,n FFI_TYPE_SMALL_STRUCT4, %r21, L$checksmst5
  	/* 4-byte structs are returned in ret0 as wwxxyyzz.  */
  	extru	%ret0, 7, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret0, 15, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret0, 23, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	b	L$done
  	stb	%ret0, 0(%r20)
  
  L$checksmst5
  	comib,<>,n FFI_TYPE_SMALL_STRUCT5, %r21, L$checksmst6
  	/* 5 byte values are returned right justified:
  	      ret0     ret1
  	   5: ??????aa bbccddee */
  	stbs,ma	%ret0, 1(%r20)
  	extru	%ret1, 7, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret1, 15, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret1, 23, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	b	L$done
  	stb	%ret1, 0(%r20)
  
  L$checksmst6
  	comib,<>,n FFI_TYPE_SMALL_STRUCT6, %r21, L$checksmst7
  	/* 6 byte values are returned right justified:
  	      ret0     ret1
  	   6: ????aabb ccddeeff */
  	extru	%ret0, 23, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	stbs,ma	%ret0, 1(%r20)
  	extru	%ret1, 7, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret1, 15, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret1, 23, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	b	L$done
  	stb	%ret1, 0(%r20)
  
  L$checksmst7
  	comib,<>,n FFI_TYPE_SMALL_STRUCT7, %r21, L$checksmst8
  	/* 7 byte values are returned right justified:
  	      ret0     ret1
  	   7: ??aabbcc ddeeffgg */
  	extru	%ret0, 15, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret0, 23, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	stbs,ma	%ret0, 1(%r20)
  	extru	%ret1, 7, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret1, 15, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret1, 23, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	b	L$done
  	stb	%ret1, 0(%r20)
  
  L$checksmst8
  	comib,<>,n FFI_TYPE_SMALL_STRUCT8, %r21, L$done
  	/* 8 byte values are returned right justified:
  	      ret0     ret1
  	   8: aabbccdd eeffgghh */
  	extru	%ret0, 7, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret0, 15, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret0, 23, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	stbs,ma	%ret0, 1(%r20)
  	extru	%ret1, 7, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret1, 15, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	extru	%ret1, 23, 8, %r22
  	stbs,ma	%r22, 1(%r20)
  	stb	%ret1, 0(%r20)
  
  L$done
  	/* all done, return */
  	copy	%r4, %sp	; pop arg stack
  	ldw	12(%r3), %r4
  	ldwm	-64(%sp), %r3	; .. and pop stack
  	ldw	-20(%sp), %rp
  	bv	%r0(%rp)
  	nop
  	.exit
  	.procend
  L$FE1
  
  	/* void ffi_closure_pa32(void);
  	   Called with closure argument in %r19 */
  
  	.SPACE $TEXT$
  	.SUBSPA $CODE$
  	.export ffi_closure_pa32,ENTRY,PRIV_LEV=3,RTNVAL=GR
  	.import ffi_closure_inner_pa32,CODE
  	.align 4
  L$FB2
  ffi_closure_pa32
  	.proc
  	.callinfo FRAME=64,CALLS,SAVE_RP,SAVE_SP,ENTRY_GR=3
  	.entry
  
  	stw	%rp, -20(%sp)
  	copy	%r3, %r1
  L$CFI21
  	copy	%sp, %r3
  L$CFI22
  	stwm	%r1, 64(%sp)
  
  	/* Put arguments onto the stack and call ffi_closure_inner.  */
  	stw	%arg0, -36(%r3)
  	stw	%arg1, -40(%r3)
  	stw	%arg2, -44(%r3)
  	stw	%arg3, -48(%r3)
  
  	/* Retrieve closure pointer and real gp.  */
  	copy	%r19, %arg0
  	ldw	8(%r19), %r19
  	bl	ffi_closure_inner_pa32, %r2
  	copy    %r3, %arg1
  	ldwm	-64(%sp), %r3
  	ldw	-20(%sp), %rp
  	ldw	-36(%sp), %ret0
  	bv	%r0(%rp)
  	ldw	-40(%sp), %ret1
  	.exit
  	.procend
  L$FE2:
  
  	.SPACE $PRIVATE$
  	.SUBSPA $DATA$
  
  	.align 4
  	.EXPORT _GLOBAL__F_ffi_call_pa32,DATA
  _GLOBAL__F_ffi_call_pa32
  L$frame1:
  	.word   L$ECIE1-L$SCIE1 ;# Length of Common Information Entry
  L$SCIE1:
  	.word   0x0     ;# CIE Identifier Tag
  	.byte   0x1     ;# CIE Version
  	.ascii "\0"     ;# CIE Augmentation
  	.uleb128 0x1    ;# CIE Code Alignment Factor
  	.sleb128 4      ;# CIE Data Alignment Factor
  	.byte   0x2     ;# CIE RA Column
  	.byte   0xc     ;# DW_CFA_def_cfa
  	.uleb128 0x1e
  	.uleb128 0x0
  	.align 4
  L$ECIE1:
  L$SFDE1:
  	.word   L$EFDE1-L$ASFDE1        ;# FDE Length
  L$ASFDE1:
  	.word   L$ASFDE1-L$frame1       ;# FDE CIE offset
  	.word   L$FB1   ;# FDE initial location
  	.word   L$FE1-L$FB1     ;# FDE address range
  
  	.byte   0x4     ;# DW_CFA_advance_loc4
  	.word   L$CFI11-L$FB1
  	.byte	0x83	;# DW_CFA_offset, column 0x3
  	.uleb128 0x0
  	.byte   0x11    ;# DW_CFA_offset_extended_sf; save r2 at [r30-20]
  	.uleb128 0x2
  	.sleb128 -5
  
  	.byte   0x4     ;# DW_CFA_advance_loc4
  	.word   L$CFI12-L$CFI11
  	.byte   0xd     ;# DW_CFA_def_cfa_register = r3
  	.uleb128 0x3
  
  	.byte   0x4     ;# DW_CFA_advance_loc4
  	.word   L$CFI13-L$CFI12
  	.byte	0x84	;# DW_CFA_offset, column 0x4
  	.uleb128 0x3
  
  	.align 4
  L$EFDE1:
  
  L$SFDE2:
  	.word   L$EFDE2-L$ASFDE2        ;# FDE Length
  L$ASFDE2:
  	.word   L$ASFDE2-L$frame1       ;# FDE CIE offset
  	.word   L$FB2   ;# FDE initial location
  	.word   L$FE2-L$FB2     ;# FDE address range
  	.byte   0x4     ;# DW_CFA_advance_loc4
  	.word   L$CFI21-L$FB2
  	.byte   0x83    ;# DW_CFA_offset, column 0x3
  	.uleb128 0x0
  	.byte   0x11    ;# DW_CFA_offset_extended_sf
  	.uleb128 0x2
  	.sleb128 -5
  
  	.byte   0x4     ;# DW_CFA_advance_loc4
  	.word   L$CFI22-L$CFI21
  	.byte   0xd     ;# DW_CFA_def_cfa_register = r3
  	.uleb128 0x3
  
  	.align 4
  L$EFDE2:
  

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