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      1 /* -----------------------------------------------------------------------
      2    sysv.h - Copyright (c) 2003 Jakub Jelinek <jakub (at) redhat.com>
      3 	    Copyright (c) 2008 Red Hat, Inc.
      4 
      5    PowerPC64 Assembly glue.
      6 
      7    Permission is hereby granted, free of charge, to any person obtaining
      8    a copy of this software and associated documentation files (the
      9    ``Software''), to deal in the Software without restriction, including
     10    without limitation the rights to use, copy, modify, merge, publish,
     11    distribute, sublicense, and/or sell copies of the Software, and to
     12    permit persons to whom the Software is furnished to do so, subject to
     13    the following conditions:
     14 
     15    The above copyright notice and this permission notice shall be included
     16    in all copies or substantial portions of the Software.
     17 
     18    THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND,
     19    EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
     20    MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
     21    NONINFRINGEMENT.  IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
     22    HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
     23    WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
     24    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
     25    DEALINGS IN THE SOFTWARE.
     26    ----------------------------------------------------------------------- */
     27 
     28 #define LIBFFI_ASM
     29 #include <fficonfig.h>
     30 #include <ffi.h>
     31 
     32 #ifdef __powerpc64__
     33 	.hidden	ffi_call_LINUX64, .ffi_call_LINUX64
     34 	.globl	ffi_call_LINUX64, .ffi_call_LINUX64
     35 	.section	".opd","aw"
     36 	.align	3
     37 ffi_call_LINUX64:
     38 	.quad	.ffi_call_LINUX64,.TOC.@tocbase,0
     39 	.size	ffi_call_LINUX64,24
     40 	.type	.ffi_call_LINUX64,@function
     41 	.text
     42 .ffi_call_LINUX64:
     43 .LFB1:
     44 	mflr	%r0
     45 	std	%r28, -32(%r1)
     46 	std	%r29, -24(%r1)
     47 	std	%r30, -16(%r1)
     48 	std	%r31, -8(%r1)
     49 	std	%r0, 16(%r1)
     50 
     51 	mr	%r28, %r1	/* our AP.  */
     52 .LCFI0:
     53 	stdux	%r1, %r1, %r4
     54 	mr	%r31, %r5	/* flags, */
     55 	mr	%r30, %r6	/* rvalue, */
     56 	mr	%r29, %r7	/* function address.  */
     57 	std	%r2, 40(%r1)
     58 
     59 	/* Call ffi_prep_args64.  */
     60 	mr	%r4, %r1
     61 	bl	.ffi_prep_args64
     62 
     63 	ld	%r0, 0(%r29)
     64 	ld	%r2, 8(%r29)
     65 	ld	%r11, 16(%r29)
     66 
     67 	/* Now do the call.  */
     68 	/* Set up cr1 with bits 4-7 of the flags.  */
     69 	mtcrf	0x40, %r31
     70 
     71 	/* Get the address to call into CTR.  */
     72 	mtctr	%r0
     73 	/* Load all those argument registers.  */
     74 	ld	%r3, -32-(8*8)(%r28)
     75 	ld	%r4, -32-(7*8)(%r28)
     76 	ld	%r5, -32-(6*8)(%r28)
     77 	ld	%r6, -32-(5*8)(%r28)
     78 	bf-	5, 1f
     79 	ld	%r7, -32-(4*8)(%r28)
     80 	ld	%r8, -32-(3*8)(%r28)
     81 	ld	%r9, -32-(2*8)(%r28)
     82 	ld	%r10, -32-(1*8)(%r28)
     83 1:
     84 
     85 	/* Load all the FP registers.  */
     86 	bf-	6, 2f
     87 	lfd	%f1, -32-(21*8)(%r28)
     88 	lfd	%f2, -32-(20*8)(%r28)
     89 	lfd	%f3, -32-(19*8)(%r28)
     90 	lfd	%f4, -32-(18*8)(%r28)
     91 	lfd	%f5, -32-(17*8)(%r28)
     92 	lfd	%f6, -32-(16*8)(%r28)
     93 	lfd	%f7, -32-(15*8)(%r28)
     94 	lfd	%f8, -32-(14*8)(%r28)
     95 	lfd	%f9, -32-(13*8)(%r28)
     96 	lfd	%f10, -32-(12*8)(%r28)
     97 	lfd	%f11, -32-(11*8)(%r28)
     98 	lfd	%f12, -32-(10*8)(%r28)
     99 	lfd	%f13, -32-(9*8)(%r28)
    100 2:
    101 
    102 	/* Make the call.  */
    103 	bctrl
    104 
    105 	/* This must follow the call immediately, the unwinder
    106 	   uses this to find out if r2 has been saved or not.  */
    107 	ld	%r2, 40(%r1)
    108 
    109 	/* Now, deal with the return value.  */
    110 	mtcrf	0x01, %r31
    111 	bt-	30, .Ldone_return_value
    112 	bt-	29, .Lfp_return_value
    113 	std	%r3, 0(%r30)
    114 	/* Fall through...  */
    115 
    116 .Ldone_return_value:
    117 	/* Restore the registers we used and return.  */
    118 	mr	%r1, %r28
    119 	ld	%r0, 16(%r28)
    120 	ld	%r28, -32(%r1)
    121 	mtlr	%r0
    122 	ld	%r29, -24(%r1)
    123 	ld	%r30, -16(%r1)
    124 	ld	%r31, -8(%r1)
    125 	blr
    126 
    127 .Lfp_return_value:
    128 	bf	28, .Lfloat_return_value
    129 	stfd	%f1, 0(%r30)
    130 	mtcrf	0x02, %r31 /* cr6  */
    131 	bf	27, .Ldone_return_value
    132 	stfd	%f2, 8(%r30)
    133 	b	.Ldone_return_value
    134 .Lfloat_return_value:
    135 	stfs	%f1, 0(%r30)
    136 	b	.Ldone_return_value
    137 .LFE1:
    138 	.long	0
    139 	.byte	0,12,0,1,128,4,0,0
    140 	.size	.ffi_call_LINUX64,.-.ffi_call_LINUX64
    141 
    142 	.section	.eh_frame,EH_FRAME_FLAGS,@progbits
    143 .Lframe1:
    144 	.4byte	.LECIE1-.LSCIE1	 # Length of Common Information Entry
    145 .LSCIE1:
    146 	.4byte	0x0	 # CIE Identifier Tag
    147 	.byte	0x1	 # CIE Version
    148 	.ascii "zR\0"	 # CIE Augmentation
    149 	.uleb128 0x1	 # CIE Code Alignment Factor
    150 	.sleb128 -8	 # CIE Data Alignment Factor
    151 	.byte	0x41	 # CIE RA Column
    152 	.uleb128 0x1	 # Augmentation size
    153 	.byte	0x14	 # FDE Encoding (pcrel udata8)
    154 	.byte	0xc	 # DW_CFA_def_cfa
    155 	.uleb128 0x1
    156 	.uleb128 0x0
    157 	.align 3
    158 .LECIE1:
    159 .LSFDE1:
    160 	.4byte	.LEFDE1-.LASFDE1	 # FDE Length
    161 .LASFDE1:
    162 	.4byte	.LASFDE1-.Lframe1	 # FDE CIE offset
    163 	.8byte	.LFB1-.	 # FDE initial location
    164 	.8byte	.LFE1-.LFB1	 # FDE address range
    165 	.uleb128 0x0	 # Augmentation size
    166 	.byte	0x2	 # DW_CFA_advance_loc1
    167 	.byte	.LCFI0-.LFB1
    168 	.byte	0xd	 # DW_CFA_def_cfa_register
    169 	.uleb128 0x1c
    170 	.byte	0x11	 # DW_CFA_offset_extended_sf
    171 	.uleb128 0x41
    172 	.sleb128 -2
    173 	.byte	0x9f	 # DW_CFA_offset, column 0x1f
    174 	.uleb128 0x1
    175 	.byte	0x9e	 # DW_CFA_offset, column 0x1e
    176 	.uleb128 0x2
    177 	.byte	0x9d	 # DW_CFA_offset, column 0x1d
    178 	.uleb128 0x3
    179 	.byte	0x9c	 # DW_CFA_offset, column 0x1c
    180 	.uleb128 0x4
    181 	.align 3
    182 .LEFDE1:
    183 #endif
    184 
    185 #if defined __ELF__ && defined __linux__
    186 	.section	.note.GNU-stack,"",@progbits
    187 #endif
    188