mirror of https://github.com/acidanthera/audk.git
326 lines
8.4 KiB
ArmAsm
326 lines
8.4 KiB
ArmAsm
//++
|
|
// Copyright (c) 2004, Intel Corporation. All rights reserved.<BR>
|
|
// This program and the accompanying materials
|
|
// are licensed and made available under the terms and conditions of the BSD License
|
|
// which accompanies this distribution. The full text of the license may be found at
|
|
// http://opensource.org/licenses/bsd-license.php
|
|
//
|
|
// THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
|
|
// WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
|
|
//
|
|
// Module Name:
|
|
//
|
|
// setjmp.s
|
|
//
|
|
// Abstract:
|
|
//
|
|
// Contains an implementation of setjmp and longjmp for the
|
|
// Itanium-based architecture.
|
|
//
|
|
//
|
|
//
|
|
// Revision History:
|
|
//
|
|
//--
|
|
|
|
.file "setjmp.s"
|
|
|
|
#include <Asm.h>
|
|
#include <Ia_64Gen.h>
|
|
|
|
// int SetJump(struct jmp_buffer save)
|
|
//
|
|
// Setup a non-local goto.
|
|
//
|
|
// Description:
|
|
//
|
|
// SetJump stores the current register set in the area pointed to
|
|
// by "save". It returns zero. Subsequent calls to "LongJump" will
|
|
// restore the registers and return non-zero to the same location.
|
|
//
|
|
// On entry, r32 contains the pointer to the jmp_buffer
|
|
//
|
|
|
|
PROCEDURE_ENTRY(SetJump)
|
|
//
|
|
// Make sure buffer is aligned at 16byte boundary
|
|
//
|
|
mov r32 = r33
|
|
|
|
add r10 = -0x10,r0 ;; // mask the lower 4 bits
|
|
and r32 = r32, r10;;
|
|
add r32 = 0x10, r32;; // move to next 16 byte boundary
|
|
|
|
add r10 = J_PREDS, r32 // skip Unats & pfs save area
|
|
add r11 = J_BSP, r32
|
|
//
|
|
// save immediate context
|
|
//
|
|
mov r2 = ar.bsp // save backing store pointer
|
|
mov r3 = pr // save predicates
|
|
;;
|
|
//
|
|
// save user Unat register
|
|
//
|
|
mov r16 = ar.lc // save loop count register
|
|
mov r14 = ar.unat // save user Unat register
|
|
|
|
st8 [r10] = r3, J_LC-J_PREDS
|
|
st8 [r11] = r2, J_R4-J_BSP
|
|
;;
|
|
st8 [r10] = r16, J_R5-J_LC
|
|
st8 [r32] = r14, J_NATS // Note: Unat at the
|
|
// beginning of the save area
|
|
mov r15 = ar.pfs
|
|
;;
|
|
//
|
|
// save preserved general registers & NaT's
|
|
//
|
|
st8.spill [r11] = r4, J_R6-J_R4
|
|
;;
|
|
st8.spill [r10] = r5, J_R7-J_R5
|
|
;;
|
|
st8.spill [r11] = r6, J_SP-J_R6
|
|
;;
|
|
st8.spill [r10] = r7, J_F3-J_R7
|
|
;;
|
|
st8.spill [r11] = sp, J_F2-J_SP
|
|
;;
|
|
//
|
|
// save spilled Unat and pfs registers
|
|
//
|
|
mov r2 = ar.unat // save Unat register after spill
|
|
;;
|
|
st8 [r32] = r2, J_PFS-J_NATS // save unat for spilled regs
|
|
;;
|
|
st8 [r32] = r15 // save pfs
|
|
//
|
|
// save floating registers
|
|
//
|
|
stf.spill [r11] = f2, J_F4-J_F2
|
|
stf.spill [r10] = f3, J_F5-J_F3
|
|
;;
|
|
stf.spill [r11] = f4, J_F16-J_F4
|
|
stf.spill [r10] = f5, J_F17-J_F5
|
|
;;
|
|
stf.spill [r11] = f16, J_F18-J_F16
|
|
stf.spill [r10] = f17, J_F19-J_F17
|
|
;;
|
|
stf.spill [r11] = f18, J_F20-J_F18
|
|
stf.spill [r10] = f19, J_F21-J_F19
|
|
;;
|
|
stf.spill [r11] = f20, J_F22-J_F20
|
|
stf.spill [r10] = f21, J_F23-J_F21
|
|
;;
|
|
stf.spill [r11] = f22, J_F24-J_F22
|
|
stf.spill [r10] = f23, J_F25-J_F23
|
|
;;
|
|
stf.spill [r11] = f24, J_F26-J_F24
|
|
stf.spill [r10] = f25, J_F27-J_F25
|
|
;;
|
|
stf.spill [r11] = f26, J_F28-J_F26
|
|
stf.spill [r10] = f27, J_F29-J_F27
|
|
;;
|
|
stf.spill [r11] = f28, J_F30-J_F28
|
|
stf.spill [r10] = f29, J_F31-J_F29
|
|
;;
|
|
stf.spill [r11] = f30, J_FPSR-J_F30
|
|
stf.spill [r10] = f31, J_B0-J_F31 // size of f31 + fpsr
|
|
//
|
|
// save FPSR register & branch registers
|
|
//
|
|
mov r2 = ar.fpsr // save fpsr register
|
|
mov r3 = b0
|
|
;;
|
|
st8 [r11] = r2, J_B1-J_FPSR
|
|
st8 [r10] = r3, J_B2-J_B0
|
|
mov r2 = b1
|
|
mov r3 = b2
|
|
;;
|
|
st8 [r11] = r2, J_B3-J_B1
|
|
st8 [r10] = r3, J_B4-J_B2
|
|
mov r2 = b3
|
|
mov r3 = b4
|
|
;;
|
|
st8 [r11] = r2, J_B5-J_B3
|
|
st8 [r10] = r3
|
|
mov r2 = b5
|
|
;;
|
|
st8 [r11] = r2
|
|
;;
|
|
//
|
|
// return
|
|
//
|
|
mov r8 = r0 // return 0 from setjmp
|
|
mov ar.unat = r14 // restore unat
|
|
br.ret.sptk b0
|
|
|
|
PROCEDURE_EXIT(SetJump)
|
|
|
|
|
|
//
|
|
// void LongJump(struct jmp_buffer *)
|
|
//
|
|
// Perform a non-local goto.
|
|
//
|
|
// Description:
|
|
//
|
|
// LongJump initializes the register set to the values saved by a
|
|
// previous 'SetJump' and jumps to the return location saved by that
|
|
// 'SetJump'. This has the effect of unwinding the stack and returning
|
|
// for a second time to the 'SetJump'.
|
|
//
|
|
|
|
PROCEDURE_ENTRY(LongJump)
|
|
//
|
|
// Make sure buffer is aligned at 16byte boundary
|
|
//
|
|
mov r32 = r33
|
|
|
|
add r10 = -0x10,r0 ;; // mask the lower 4 bits
|
|
and r32 = r32, r10;;
|
|
add r32 = 0x10, r32;; // move to next 16 byte boundary
|
|
|
|
//
|
|
// caching the return value as we do invala in the end
|
|
//
|
|
/// mov r8 = r33 // return value
|
|
mov r8 = 1 // For now return hard coded 1
|
|
|
|
//
|
|
// get immediate context
|
|
//
|
|
mov r14 = ar.rsc // get user RSC conf
|
|
add r10 = J_PFS, r32 // get address of pfs
|
|
add r11 = J_NATS, r32
|
|
;;
|
|
ld8 r15 = [r10], J_BSP-J_PFS // get pfs
|
|
ld8 r2 = [r11], J_LC-J_NATS // get unat for spilled regs
|
|
;;
|
|
mov ar.unat = r2
|
|
;;
|
|
ld8 r16 = [r10], J_PREDS-J_BSP // get backing store pointer
|
|
mov ar.rsc = r0 // put RSE in enforced lazy
|
|
mov ar.pfs = r15
|
|
;;
|
|
|
|
//
|
|
// while returning from longjmp the BSPSTORE and BSP needs to be
|
|
// same and discard all the registers allocated after we did
|
|
// setjmp. Also, we need to generate the RNAT register since we
|
|
// did not flushed the RSE on setjmp.
|
|
//
|
|
mov r17 = ar.bspstore // get current BSPSTORE
|
|
;;
|
|
cmp.ltu p6,p7 = r17, r16 // is it less than BSP of
|
|
(p6) br.spnt.few .flush_rse
|
|
mov r19 = ar.rnat // get current RNAT
|
|
;;
|
|
loadrs // invalidate dirty regs
|
|
br.sptk.many .restore_rnat // restore RNAT
|
|
|
|
.flush_rse:
|
|
flushrs
|
|
;;
|
|
mov r19 = ar.rnat // get current RNAT
|
|
mov r17 = r16 // current BSPSTORE
|
|
;;
|
|
.restore_rnat:
|
|
//
|
|
// check if RNAT is saved between saved BSP and curr BSPSTORE
|
|
//
|
|
dep r18 = -1,r16,3,6 // get RNAT address
|
|
;;
|
|
cmp.ltu p8,p9 = r18, r17 // RNAT saved on RSE
|
|
;;
|
|
(p8) ld8 r19 = [r18] // get RNAT from RSE
|
|
;;
|
|
mov ar.bspstore = r16 // set new BSPSTORE
|
|
;;
|
|
mov ar.rnat = r19 // restore RNAT
|
|
mov ar.rsc = r14 // restore RSC conf
|
|
|
|
|
|
ld8 r3 = [r11], J_R4-J_LC // get lc register
|
|
ld8 r2 = [r10], J_R5-J_PREDS // get predicates
|
|
;;
|
|
mov pr = r2, -1
|
|
mov ar.lc = r3
|
|
//
|
|
// restore preserved general registers & NaT's
|
|
//
|
|
ld8.fill r4 = [r11], J_R6-J_R4
|
|
;;
|
|
ld8.fill r5 = [r10], J_R7-J_R5
|
|
ld8.fill r6 = [r11], J_SP-J_R6
|
|
;;
|
|
ld8.fill r7 = [r10], J_F2-J_R7
|
|
ld8.fill sp = [r11], J_F3-J_SP
|
|
;;
|
|
//
|
|
// restore floating registers
|
|
//
|
|
ldf.fill f2 = [r10], J_F4-J_F2
|
|
ldf.fill f3 = [r11], J_F5-J_F3
|
|
;;
|
|
ldf.fill f4 = [r10], J_F16-J_F4
|
|
ldf.fill f5 = [r11], J_F17-J_F5
|
|
;;
|
|
ldf.fill f16 = [r10], J_F18-J_F16
|
|
ldf.fill f17 = [r11], J_F19-J_F17
|
|
;;
|
|
ldf.fill f18 = [r10], J_F20-J_F18
|
|
ldf.fill f19 = [r11], J_F21-J_F19
|
|
;;
|
|
ldf.fill f20 = [r10], J_F22-J_F20
|
|
ldf.fill f21 = [r11], J_F23-J_F21
|
|
;;
|
|
ldf.fill f22 = [r10], J_F24-J_F22
|
|
ldf.fill f23 = [r11], J_F25-J_F23
|
|
;;
|
|
ldf.fill f24 = [r10], J_F26-J_F24
|
|
ldf.fill f25 = [r11], J_F27-J_F25
|
|
;;
|
|
ldf.fill f26 = [r10], J_F28-J_F26
|
|
ldf.fill f27 = [r11], J_F29-J_F27
|
|
;;
|
|
ldf.fill f28 = [r10], J_F30-J_F28
|
|
ldf.fill f29 = [r11], J_F31-J_F29
|
|
;;
|
|
ldf.fill f30 = [r10], J_FPSR-J_F30
|
|
ldf.fill f31 = [r11], J_B0-J_F31 ;;
|
|
|
|
//
|
|
// restore branch registers and fpsr
|
|
//
|
|
ld8 r16 = [r10], J_B1-J_FPSR // get fpsr
|
|
ld8 r17 = [r11], J_B2-J_B0 // get return pointer
|
|
;;
|
|
mov ar.fpsr = r16
|
|
mov b0 = r17
|
|
ld8 r2 = [r10], J_B3-J_B1
|
|
ld8 r3 = [r11], J_B4-J_B2
|
|
;;
|
|
mov b1 = r2
|
|
mov b2 = r3
|
|
ld8 r2 = [r10], J_B5-J_B3
|
|
ld8 r3 = [r11]
|
|
;;
|
|
mov b3 = r2
|
|
mov b4 = r3
|
|
ld8 r2 = [r10]
|
|
ld8 r21 = [r32] // get user unat
|
|
;;
|
|
mov b5 = r2
|
|
mov ar.unat = r21
|
|
|
|
//
|
|
// invalidate ALAT
|
|
//
|
|
invala ;;
|
|
|
|
br.ret.sptk b0
|
|
PROCEDURE_EXIT(LongJump)
|
|
|
|
|