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jlechner |
/* -----------------------------------------------------------------------
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eabi.S - Copyright (c) 2004 Anthony Green
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FR-V Assembly glue.
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$Id: eabi.S,v 1.1.1.1 2007/08/18 13:58:58 jeunes2 Exp $
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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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#define LIBFFI_ASM
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#include
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#include
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.globl ffi_prep_args_EABI
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.text
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.p2align 4
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.globl ffi_call_EABI
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.type ffi_call_EABI, @function
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# gr8 : ffi_prep_args
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# gr9 : &ecif
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# gr10: cif->bytes
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# gr11: fig->flags
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# gr12: ecif.rvalue
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# gr13: fn
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ffi_call_EABI:
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addi sp, #-80, sp
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sti fp, @(sp, #24)
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addi sp, #24, fp
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movsg lr, gr5
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/* Make room for the new arguments. */
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/* subi sp, fp, gr10 */
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/* Store return address and incoming args on stack. */
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sti gr5, @(fp, #8)
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sti gr8, @(fp, #-4)
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sti gr9, @(fp, #-8)
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sti gr10, @(fp, #-12)
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sti gr11, @(fp, #-16)
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sti gr12, @(fp, #-20)
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sti gr13, @(fp, #-24)
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sub sp, gr10, sp
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/* Call ffi_prep_args. */
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ldi @(fp, #-4), gr4
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addi sp, #0, gr8
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ldi @(fp, #-8), gr9
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#ifdef __FRV_FDPIC__
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ldd @(gr4, gr0), gr14
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calll @(gr14, gr0)
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#else
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calll @(gr4, gr0)
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#endif
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/* ffi_prep_args returns the new stack pointer. */
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mov gr8, gr4
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ldi @(sp, #0), gr8
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ldi @(sp, #4), gr9
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ldi @(sp, #8), gr10
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ldi @(sp, #12), gr11
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ldi @(sp, #16), gr12
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ldi @(sp, #20), gr13
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/* Always copy the return value pointer into the hidden
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parameter register. This is only strictly necessary
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when we're returning an aggregate type, but it doesn't
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hurt to do this all the time, and it saves a branch. */
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ldi @(fp, #-20), gr3
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/* Use the ffi_prep_args return value for the new sp. */
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mov gr4, sp
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/* Call the target function. */
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ldi @(fp, -24), gr4
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#ifdef __FRV_FDPIC__
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ldd @(gr4, gr0), gr14
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calll @(gr14, gr0)
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#else
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calll @(gr4, gr0)
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#endif
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/* Store the result. */
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ldi @(fp, #-16), gr10 /* fig->flags */
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ldi @(fp, #-20), gr4 /* ecif.rvalue */
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/* Is the return value stored in two registers? */
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cmpi gr10, #8, icc0
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bne icc0, 0, .L2
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/* Yes, save them. */
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sti gr8, @(gr4, #0)
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sti gr9, @(gr4, #4)
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bra .L3
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.L2:
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/* Is the return value a structure? */
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cmpi gr10, #-1, icc0
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beq icc0, 0, .L3
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/* No, save a 4 byte return value. */
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sti gr8, @(gr4, #0)
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.L3:
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/* Restore the stack, and return. */
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ldi @(fp, 8), gr5
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ld @(fp, gr0), fp
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addi sp,#80,sp
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jmpl @(gr5,gr0)
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.size ffi_call_EABI, .-ffi_call_EABI
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