Mercurial > pub > dyncall > dyncall
view dyncallback/dyncall_callback_ppc32.S @ 127:645443fcfb47
- doc and todo update to reflect working mips64 n64 big endian support
author | cslag |
---|---|
date | Tue, 05 Jul 2016 14:30:56 +0200 |
parents | 3e629dc19168 |
children | c04be81f4874 |
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/* Package: dyncall Library: dyncallback File: dyncallback/dyncall_callback_ppc32.S Description: Callback Thunk Entry for PowerPC 32-bit System V Big-Endian ABI License: Copyright (c) 2015 Daniel Adler <dadler@uni-goettingen.de> Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "../portasm/portasm-ppc.S" .machine ppc .text .align 2 /* Struct DCCallback */ DCB_THUNK = 0 DCB_HANDLER = 24 DCB_CLEANUP = 28 DCB_USERDATA = 32 /* Struct DCArgs */ ARGS_IREGS = 0 ARGS_FREGS = ARGS_IREGS + 4*8 ARGS_SP = ARGS_FREGS + 8*13 ARGS_ICNT = ARGS_SP + 4 ARGS_FCNT = ARGS_ICNT + 4 ARGS_SIZE = ARGS_FCNT + 4 /* Struct DCValue */ RESULT_SIZE = 8 /* Stack Offsets: */ SP_PREV = 0 SP_LR = (SP_PREV + 4) SP_PAR = SP_LR + 4 PAR_SZ = 0 SP_ARGS = SP_PAR + PAR_SZ SP_IREGS = SP_ARGS + ARGS_IREGS SP_FREGS = SP_ARGS + ARGS_FREGS SP_SP = SP_ARGS + ARGS_SP SP_ICNT = SP_ARGS + ARGS_ICNT SP_FCNT = SP_ARGS + ARGS_FCNT SP_RESULT = SP_ARGS + ARGS_SIZE SP_SIZE = SP_RESULT + RESULT_SIZE #define ALIGN(M,X) ( M+(X-1) & (-X) ) FRAMESIZE = ALIGN(SP_SIZE,16) GLOBAL_C(dcCallbackThunkEntry) ENTRY_C(dcCallbackThunkEntry) /* -------------------------------------------------------------------------- Input: r1 Stack Pointer r3-r10 Integer Arguments f1-f8 Floating-point Arguments r11 Thunk Pointer */ /* prolog */ mflr r0 stw r0, SP_LR(r1) /* store return address */ addi r12, r1, SP_PAR /* temporary r12: parameter area on callers stack frame */ stwu r1, -FRAMESIZE(r1) stw r3, SP_IREGS + 0*4(r1) /* spill 8 integer parameter registers */ stw r4, SP_IREGS + 1*4(r1) stw r5, SP_IREGS + 2*4(r1) stw r6, SP_IREGS + 3*4(r1) stw r7, SP_IREGS + 4*4(r1) stw r8, SP_IREGS + 5*4(r1) stw r9, SP_IREGS + 6*4(r1) stw r10,SP_IREGS + 7*4(r1) stfd f1, SP_FREGS + 0*8(r1) /* spill 8 (of 13) float parameter registers */ stfd f2, SP_FREGS + 1*8(r1) stfd f3, SP_FREGS + 2*8(r1) stfd f4, SP_FREGS + 3*8(r1) stfd f5, SP_FREGS + 4*8(r1) stfd f6, SP_FREGS + 5*8(r1) stfd f7, SP_FREGS + 6*8(r1) stfd f8, SP_FREGS + 7*8(r1) stw r12, SP_SP(r1) /* init stack pointer */ xor r0, r0, r0 /* init register counters */ stw r0, SP_ICNT(r1) stw r0, SP_FCNT(r1) stw r0, SP_RESULT(r1) /* init result object */ stw r0, SP_RESULT + 4(r1) /* invoke callback handler */ mr r3, r11 /* arg 1: DCCallback* pcb (r11 is thunk pointer) */ addi r4, r1, SP_ARGS /* arg 2: DCArgs* args */ addi r5, r1, SP_RESULT /* arg 3: DCValue* result */ lwz r6, DCB_USERDATA(r11) /* arg 4: void* userdata */ /* branch-and-link to DCCallback.handler */ lwz r12, DCB_HANDLER(r11) mtctr r12 bctrl /* check result type */ cmpi cr0, r3, 'f beq .f32 cmpi cr0, r3, 'd beq .f64 .i64: lwz r3, SP_RESULT (r1) lwz r4, SP_RESULT + 4 (r1) .end: lwz r1, SP_PREV(r1) /* restore stack pointer */ lwz r0, SP_LR(r1) /* load link register with return address */ mtlr r0 blr /* branch back to link register */ .f32: lfs f1, SP_RESULT(r1) b .end .f64: lfd f1, SP_RESULT(r1) b .end