ada4a003f9
REF:https://bugzilla.tianocore.org/show_bug.cgi?id=1091 Previously, when compiling NASM source files, BaseTools did not support including files outside of the NASM source file directory. As a result, we duplicated multiple copies of "StuffRsb.inc" files in UefiCpuPkg. Those INC files contain the common logic to stuff the Return Stack Buffer and are identical. After the fix of BZ 1085: https://bugzilla.tianocore.org/show_bug.cgi?id=1085 The above support was introduced. Thus, this commit will merge all the StuffRsb.inc files in UefiCpuPkg into one file. The merged file will be named 'StuffRsbNasm.inc' and be placed under folder UefiCpuPkg/Include/. Cc: Ruiyu Ni <ruiyu.ni@intel.com> Contributed-under: TianoCore Contribution Agreement 1.1 Signed-off-by: Hao Wu <hao.a.wu@intel.com> Reviewed-by: Eric Dong <eric.dong@intel.com> Reviewed-by: Laszlo Ersek <lersek@redhat.com>
57 lines
1.6 KiB
PHP
57 lines
1.6 KiB
PHP
;------------------------------------------------------------------------------
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;
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; Copyright (c) 2018, Intel Corporation. All rights reserved.<BR>
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; This program and the accompanying materials
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; are licensed and made available under the terms and conditions of the BSD License
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; which accompanies this distribution. The full text of the license may be found at
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; http://opensource.org/licenses/bsd-license.php.
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;
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; THE PROGRAM IS DISTRIBUTED UNDER THE BSD LICENSE ON AN "AS IS" BASIS,
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; WITHOUT WARRANTIES OR REPRESENTATIONS OF ANY KIND, EITHER EXPRESS OR IMPLIED.
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;
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; Abstract:
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;
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; This file provides macro definitions for stuffing the Return Stack Buffer (RSB)
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; for NASM files.
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;
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;------------------------------------------------------------------------------
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%define RSB_STUFF_ENTRIES 0x20
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;
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; parameters:
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; @param 1: register to use as counter (e.g. IA32:eax, X64:rax)
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; @param 2: stack pointer to restore (IA32:esp, X64:rsp)
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; @param 3: the size of a stack frame (IA32:4, X64:8)
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;
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%macro StuffRsb 3
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mov %1, RSB_STUFF_ENTRIES / 2
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%%Unroll1:
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call %%Unroll2
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%%SpecTrap1:
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pause
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lfence
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jmp %%SpecTrap1
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%%Unroll2:
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call %%StuffLoop
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%%SpecTrap2:
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pause
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lfence
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jmp %%SpecTrap2
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%%StuffLoop:
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dec %1
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jnz %%Unroll1
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add %2, RSB_STUFF_ENTRIES * %3 ; Restore the stack pointer
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%endmacro
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;
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; RSB stuffing macros for IA32 and X64
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;
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%macro StuffRsb32 0
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StuffRsb eax, esp, 4
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%endmacro
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%macro StuffRsb64 0
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StuffRsb rax, rsp, 8
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%endmacro
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