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// TITLE("POSIX Thunks")//++//// Copyright (c) 1991 Microsoft Corporation// Copyright (c) 1993 Digital Equipment Corporation//// Module Name://// psxthunk.s//// Abstract://// Author://// Ellena Aycock-Wright (ellena) 11-Jan-1991//// Revision History://// Thomas Van Baak (tvb) 11-Dec-1992//// Adapted for Alpha AXP.////--
#include "ksalpha.h"
SBTTL("Call Null Api")//++//// The following code is never executed. Its purpose is to support unwinding// through the call to the null API function. The instructions below are read// by virtual unwind to restore the context of the calling function.////--
NESTED_ENTRY(PdxNullApiCall, ContextFrameLength, zero)
.set noreorder .set noat stq sp, CxIntSp(sp) // stack pointer stq ra, CxIntRa(sp) // return address stq ra, CxFir(sp) // continuation address stq gp, CxIntGp(sp) // integer register gp
stq s0, CxIntS0(sp) // integer registers s0 - s5 stq s1, CxIntS1(sp) // stq s2, CxIntS2(sp) // stq s3, CxIntS3(sp) // stq s4, CxIntS4(sp) // stq s5, CxIntS5(sp) // stq fp, CxIntFp(sp) // integer register fp
stt f2, CxFltF2(sp) // floating registers f2 - f9 stt f3, CxFltF3(sp) // stt f4, CxFltF4(sp) // stt f5, CxFltF5(sp) // stt f6, CxFltF6(sp) // stt f7, CxFltF7(sp) // stt f8, CxFltF8(sp) // stt f9, CxFltF9(sp) // .set at .set reorder
PROLOGUE_END
ALTERNATE_ENTRY(_PdxNullApiCaller)
mov sp, a0 // set address of context record bsr ra, PdxNullApiCaller // call null api caller
.end PdxNullApiCaller SBTTL("Call Signal Deliverer")//++//// The following code is never executed. Its purpose is to support unwinding// through the call to the signal deliverer. The instructions below are read// by virtual unwind to restore the context of the calling function.////--
NESTED_ENTRY(PdxSignalDeliver, ContextFrameLength, zero)
.set noreorder .set noat stq sp, CxIntSp(sp) // stack pointer stq ra, CxIntRa(sp) // return address stq ra, CxFir(sp) // continuation address stq gp, CxIntGp(sp) // integer register gp
stq s0, CxIntS0(sp) // integer registers s0 - s5 stq s1, CxIntS1(sp) // stq s2, CxIntS2(sp) // stq s3, CxIntS3(sp) // stq s4, CxIntS4(sp) // stq s5, CxIntS5(sp) // stq fp, CxIntFp(sp) // integer register fp
stt f2, CxFltF2(sp) // floating registers f2 - f9 stt f3, CxFltF3(sp) // stt f4, CxFltF4(sp) // stt f5, CxFltF5(sp) // stt f6, CxFltF6(sp) // stt f7, CxFltF7(sp) // stt f8, CxFltF8(sp) // stt f9, CxFltF9(sp) // .set at .set reorder
PROLOGUE_END
//++//// VOID// _PdxSignalDeliverer (// IN PCONTEXT Context,// IN sigset_t Mask,// IN int Signal,// IN _handler Handler// )//// Routine Description://// The following routine provides linkage to POSIX client routines to// perform signal delivery.//// Arguments://// s0 - s5 - Supply parameter values.//// sp - Supplies the address of a context record.//// Return Value://// There is no return from these routines.////--
ALTERNATE_ENTRY(_PdxSignalDeliverer)
mov sp, a0 // set address of context record mov s1, a1 // set previous block mask mov s2, a2 // set signal number mov s3, a3 // set signal handler
bsr ra, PdxSignalDeliverer // deliver signal to POSIX client
.end _PsxSignalDeliverer
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