From ac63b415ed08521cf3636aca19edf7a3a9818d09 Mon Sep 17 00:00:00 2001 From: Paul Menzel Date: Thu, 31 Aug 2017 06:47:38 +0200 Subject: vendorcode/amd/agesa: Fix variable length array declaration MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit Definition of S_PSTATE only allowed PStateStruct[0], while it is effectively used as a flexible array. Since sizeof(S_PSTATE) is reduced here by sizeof(S_PSTATE_VALUES), we have to account for that when calculating PStateLevelingSizeOfBytes. In S_PSTATE context, PStateStruct[PStateMaxValue] is valid reference. GCC 7.2.0 warns about an out of bounds array subscript. ``` CC libagesa/vendorcode/amd/agesa/f14/Proc/CPU/Feature/cpuPstateLeveling.o src/vendorcode/amd/agesa/f14/Proc/CPU/Feature/cpuPstateLeveling.c: In function 'PStateLevelingMain': src/vendorcode/amd/agesa/f14/Proc/CPU/Feature/cpuPstateLeveling.c:524:65: error: array subscript is above array bounds [-Werror=array-bounds] PStateBufferPtrTmp->PStateCoreStruct[0].PStateStruct[k].PStateEnable = 0; ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~^~~ [1] https://gcc.gnu.org/onlinedocs/gcc/Zero-Length.html Change-Id: If9598a951c6b882432689b677a956c44650c7083 Found-by: gcc (Debian 7.2.0-2) 7.2.0 Signed-off-by: Paul Menzel Signed-off-by: Kyösti Mälkki Reviewed-on: https://review.coreboot.org/21297 Reviewed-by: Patrick Georgi Tested-by: build bot (Jenkins) --- src/vendorcode/amd/agesa/f12/Proc/CPU/Feature/cpuPstateTables.h | 2 +- 1 file changed, 1 insertion(+), 1 deletion(-) (limited to 'src/vendorcode/amd/agesa/f12/Proc/CPU/Feature/cpuPstateTables.h') diff --git a/src/vendorcode/amd/agesa/f12/Proc/CPU/Feature/cpuPstateTables.h b/src/vendorcode/amd/agesa/f12/Proc/CPU/Feature/cpuPstateTables.h index 0ff75856f6..1944b32168 100644 --- a/src/vendorcode/amd/agesa/f12/Proc/CPU/Feature/cpuPstateTables.h +++ b/src/vendorcode/amd/agesa/f12/Proc/CPU/Feature/cpuPstateTables.h @@ -78,7 +78,7 @@ typedef struct { IN OUT UINT8 HtcCapable; ///< Htc capable IN OUT UINT8 LocalApicId; ///< Local Apic Id IN OUT UINT8 NumberOfBoostedStates; ///< Number of boost P-states - IN OUT S_PSTATE_VALUES PStateStruct[1]; ///< P state struc + IN OUT S_PSTATE_VALUES PStateStruct[]; ///< P state struc } S_PSTATE; /// P-state structure for each node -- cgit v1.2.3