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https://github.com/partic2/libffi
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Initial commit
This commit is contained in:
Anthony Green
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/* -----------------------------------------------------------------------
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darwin.S - Copyright (c) 2000 John Hornkvist
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Copyright (c) 2004 Free Software Foundation, Inc.
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PowerPC Assembly glue.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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``Software''), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be included
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in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED ``AS IS'', WITHOUT WARRANTY OF ANY KIND, EXPRESS
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OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY CLAIM, DAMAGES OR
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OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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ARISING FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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OTHER DEALINGS IN THE SOFTWARE.
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----------------------------------------------------------------------- */
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#if defined(__ppc64__)
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#define MODE_CHOICE(x, y) y
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#else
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#define MODE_CHOICE(x, y) x
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#endif
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#define g_long MODE_CHOICE(long, quad) /* usage is ".g_long" */
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#define LOG2_GPR_BYTES MODE_CHOICE(2,3) /* log2(GPR_BYTES) */
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#define LIBFFI_ASM
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#include <fficonfig.h>
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#include <ffi.h>
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#define JUMPTARGET(name) name
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#define L(x) x
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.text
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.align 2
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.globl _ffi_prep_args
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.text
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.align 2
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.globl _ffi_call_DARWIN
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.text
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.align 2
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_ffi_call_DARWIN:
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LFB0:
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mr r12,r8 /* We only need r12 until the call,
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so it doesn't have to be saved. */
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LFB1:
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/* Save the old stack pointer as AP. */
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mr r8,r1
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LCFI0:
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/* Allocate the stack space we need. */
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stwux r1,r1,r4
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/* Save registers we use. */
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mflr r9
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stw r28,-16(r8)
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stw r29,-12(r8)
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stw r30,-8(r8)
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stw r31,-4(r8)
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stw r9,8(r8)
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stw r2,20(r1)
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LCFI1:
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/* Save arguments over call. */
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mr r31,r5 /* flags, */
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mr r30,r6 /* rvalue, */
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mr r29,r7 /* function address, */
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mr r28,r8 /* our AP. */
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LCFI2:
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/* Call ffi_prep_args. */
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mr r4,r1
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li r9,0
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mtctr r12 /* r12 holds address of _ffi_prep_args. */
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bctrl
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lwz r2,20(r1)
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/* Now do the call.
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Set up cr1 with bits 4-7 of the flags. */
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mtcrf 0x40,r31
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/* Get the address to call into CTR. */
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mtctr r29
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/* Load all those argument registers.
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We have set up a nice stack frame, just load it into registers. */
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lwz r3,20+(1*4)(r1)
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lwz r4,20+(2*4)(r1)
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lwz r5,20+(3*4)(r1)
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lwz r6,20+(4*4)(r1)
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nop
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lwz r7,20+(5*4)(r1)
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lwz r8,20+(6*4)(r1)
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lwz r9,20+(7*4)(r1)
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lwz r10,20+(8*4)(r1)
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L1:
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/* Load all the FP registers. */
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bf 6,L2 /* No floats to load. */
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lfd f1,-16-(13*8)(r28)
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lfd f2,-16-(12*8)(r28)
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lfd f3,-16-(11*8)(r28)
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lfd f4,-16-(10*8)(r28)
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nop
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lfd f5,-16-(9*8)(r28)
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lfd f6,-16-(8*8)(r28)
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lfd f7,-16-(7*8)(r28)
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lfd f8,-16-(6*8)(r28)
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nop
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lfd f9,-16-(5*8)(r28)
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lfd f10,-16-(4*8)(r28)
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lfd f11,-16-(3*8)(r28)
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lfd f12,-16-(2*8)(r28)
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nop
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lfd f13,-16-(1*8)(r28)
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L2:
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mr r12,r29 /* Put the target address in r12 as specified. */
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mtctr r12
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nop
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nop
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/* Make the call. */
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bctrl
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/* Now, deal with the return value. */
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mtcrf 0x01,r31
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bt 30,L(done_return_value)
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bt 29,L(fp_return_value)
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stw r3,0(r30)
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bf 28,L(done_return_value)
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stw r4,4(r30)
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/* Fall through. */
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L(done_return_value):
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/* Restore the registers we used and return. */
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lwz r9,8(r28)
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lwz r31,-4(r28)
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mtlr r9
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lwz r30,-8(r28)
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lwz r29,-12(r28)
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lwz r28,-16(r28)
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lwz r1,0(r1)
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blr
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L(fp_return_value):
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/* Do we have long double to store? */
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bf 31,L(fd_return_value)
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stfd f1,0(r30)
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stfd f2,8(r30)
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b L(done_return_value)
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L(fd_return_value):
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/* Do we have double to store? */
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bf 28,L(float_return_value)
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stfd f1,0(r30)
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b L(done_return_value)
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L(float_return_value):
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/* We only have a float to store. */
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stfs f1,0(r30)
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b L(done_return_value)
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LFE1:
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/* END(_ffi_call_DARWIN) */
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/* Provide a null definition of _ffi_call_AIX. */
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.text
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.align 2
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.globl _ffi_call_AIX
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.text
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.align 2
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_ffi_call_AIX:
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blr
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/* END(_ffi_call_AIX) */
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.data
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.section __TEXT,__eh_frame,coalesced,no_toc+strip_static_syms
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EH_frame1:
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.set L$set$0,LECIE1-LSCIE1
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.long L$set$0 ; Length of Common Information Entry
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LSCIE1:
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.long 0x0 ; CIE Identifier Tag
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.byte 0x1 ; CIE Version
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.ascii "zR\0" ; CIE Augmentation
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.byte 0x1 ; uleb128 0x1; CIE Code Alignment Factor
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.byte 0x7c ; sleb128 -4; CIE Data Alignment Factor
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.byte 0x41 ; CIE RA Column
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.byte 0x1 ; uleb128 0x1; Augmentation size
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.byte 0x90 ; FDE Encoding (indirect pcrel)
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.byte 0xc ; DW_CFA_def_cfa
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.byte 0x1 ; uleb128 0x1
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.byte 0x0 ; uleb128 0x0
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.align LOG2_GPR_BYTES
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LECIE1:
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.globl _ffi_call_DARWIN.eh
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_ffi_call_DARWIN.eh:
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LSFDE1:
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.set L$set$1,LEFDE1-LASFDE1
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.long L$set$1 ; FDE Length
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LASFDE1:
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.long LASFDE1-EH_frame1 ; FDE CIE offset
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.g_long LLFB0$non_lazy_ptr-. ; FDE initial location
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.set L$set$3,LFE1-LFB0
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.g_long L$set$3 ; FDE address range
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.byte 0x0 ; uleb128 0x0; Augmentation size
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.byte 0x4 ; DW_CFA_advance_loc4
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.set L$set$4,LCFI0-LFB1
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.long L$set$4
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.byte 0xd ; DW_CFA_def_cfa_register
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.byte 0x08 ; uleb128 0x08
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.byte 0x4 ; DW_CFA_advance_loc4
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.set L$set$5,LCFI1-LCFI0
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.long L$set$5
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.byte 0x11 ; DW_CFA_offset_extended_sf
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.byte 0x41 ; uleb128 0x41
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.byte 0x7e ; sleb128 -2
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.byte 0x9f ; DW_CFA_offset, column 0x1f
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.byte 0x1 ; uleb128 0x1
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.byte 0x9e ; DW_CFA_offset, column 0x1e
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.byte 0x2 ; uleb128 0x2
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.byte 0x9d ; DW_CFA_offset, column 0x1d
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.byte 0x3 ; uleb128 0x3
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.byte 0x9c ; DW_CFA_offset, column 0x1c
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.byte 0x4 ; uleb128 0x4
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.byte 0x4 ; DW_CFA_advance_loc4
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.set L$set$6,LCFI2-LCFI1
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.long L$set$6
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.byte 0xd ; DW_CFA_def_cfa_register
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.byte 0x1c ; uleb128 0x1c
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.align LOG2_GPR_BYTES
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LEFDE1:
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.data
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.align LOG2_GPR_BYTES
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LLFB0$non_lazy_ptr:
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.g_long LFB0
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