[edk2-devel] [PATCH v2] IntelFsp2Pkg: Fix NASM X64 build warnings.

[Ashraf Ali S]

Hi., Chasel

RAX holds the FsptImageBaseAddress, the AND operation is performed to clear the upper 32bits of RAX registers.
Don't we have to clear the upper 32bit of RAX registers?

-----Original Message-----
From: devel at edk2.groups.io <devel at edk2.groups.io> On Behalf Of Chiu, Chasel
Sent: Friday, March 17, 2023 10:51 PM
To: devel at edk2.groups.io
Cc: Chiu, Chasel <chasel.chiu at intel.com>; Desimone, Nathaniel L <nathaniel.l.desimone at intel.com>; Zeng, Star <star.zeng at intel.com>
Subject: [edk2-devel] [PATCH v2] IntelFsp2Pkg: Fix NASM X64 build warnings.

REF: https://bugzilla.tianocore.org/show_bug.cgi?id=4377

Fix below warnings generated by NASM X64 build:
/X64/FspHelper.iii:26: warning: signed dword value exceeds bounds
/X64/FspHelper.iii:35: warning: signed dword value exceeds bounds
/X64/FspApiEntryT.iii:320: warning: dword data exceeds bounds

Cc: Nate DeSimone <nathaniel.l.desimone at intel.com>
Cc: Star Zeng <star.zeng at intel.com>
Signed-off-by: Chasel Chiu <chasel.chiu at intel.com>
---
 IntelFsp2Pkg/FspSecCore/X64/FspApiEntryT.nasm | 4 ++--
 IntelFsp2Pkg/FspSecCore/X64/FspHelper.nasm    | 4 ++--
 2 files changed, 4 insertions(+), 4 deletions(-)

diff --git a/IntelFsp2Pkg/FspSecCore/X64/FspApiEntryT.nasm b/IntelFsp2Pkg/FspSecCore/X64/FspApiEntryT.nasm
index cdebe90fab..56d6abaea6 100644
--- a/IntelFsp2Pkg/FspSecCore/X64/FspApiEntryT.nasm
+++ b/IntelFsp2Pkg/FspSecCore/X64/FspApiEntryT.nasm
@@ -317,7 +317,7 @@ Done:
    xor   eax, eax    cmp   edx, 0    jnz   Exit2-   mov   eax, 0800000000000000Eh+   mov   rax, 0800000000000000Eh  Exit2:    jmp   rbp@@ -464,7 +464,7 @@ ParamValid:
   ; Sec Platform Init   ;   CALL_YMM  ASM_PFX(SecPlatformInit)-  cmp       eax, 0+  cmp       rax, 0   jnz       TempRamInitExit    ; Load microcodediff --git a/IntelFsp2Pkg/FspSecCore/X64/FspHelper.nasm b/IntelFsp2Pkg/FspSecCore/X64/FspHelper.nasm
index 71624a3aad..ec9140b73c 100644
--- a/IntelFsp2Pkg/FspSecCore/X64/FspHelper.nasm
+++ b/IntelFsp2Pkg/FspSecCore/X64/FspHelper.nasm
@@ -23,7 +23,7 @@ ASM_PFX(AsmGetFspInfoHeader):
 global ASM_PFX(FspInfoHeaderRelativeOff) ASM_PFX(FspInfoHeaderRelativeOff):    DD    0x12345678               ; This value must be patched by the build script-   and   rax, 0xffffffff+   mov   eax, eax                 ; equal to and rax, 0xFFFFFFFF    ret  global ASM_PFX(AsmGetFspInfoHeaderNoStack)@@ -32,5 +32,5 @@ ASM_PFX(AsmGetFspInfoHeaderNoStack):
    lea   rcx, [ASM_PFX(FspInfoHeaderRelativeOff)]    mov   ecx, [rcx]    sub   rax, rcx-   and   rax, 0xffffffff+   mov   eax, eax                 ; equal to and rax, 0xFFFFFFFF    jmp   rdi-- 
2.35.0.windows.1



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