* Re: [edk2-devel] [PATCH] Use C99 flexible arrays
@ 2023-08-21 16:56 ehaouas
2023-08-22 15:28 ` Andrew Fish via groups.io
0 siblings, 1 reply; 9+ messages in thread
From: ehaouas @ 2023-08-21 16:56 UTC (permalink / raw)
To: Yao, Jiewen, devel@edk2.groups.io; +Cc: Yao, Jiewen
[-- Attachment #1: Type: text/plain, Size: 12742 bytes --]
Hi,
No, I didn't.
De : "Yao, Jiewen"
A : "devel@edk2.groups.io" ,"ehaouas@noos.fr" ,"Yao, Jiewen"
Envoyé: lundi 21 Août 2023 16:35
Objet : RE: [edk2-devel] [PATCH] Use C99 flexible arrays
Hi
This fix breaks the compatibility.
Have you tested all features that depends on this data structure?
Thank you
Yao, Jiewen
> -----Original Message-----
> From: devel@edk2.groups.io On Behalf Of Elyes Haouas
> Sent: Sunday, August 20, 2023 8:07 PM
> To: devel@edk2.groups.io
> Cc: Elyes Haouas
> Subject: [edk2-devel] [PATCH] Use C99 flexible arrays
>
> Use C99 flexible arrays instead of older style of one-element or
> zero-length arrays.
> It allows the compiler to generate errors when the flexible array does
> not occur at the end in the structure.
>
> Signed-off-by: Elyes Haouas
> ---
> EmbeddedPkg/Include/fdt.h | 4 ++--
> .../Library/FrameBufferBltLib/FrameBufferBltLib.c | 2 +-
> MdePkg/Include/IndustryStandard/IpmiNetFnApp.h | 8 ++++----
> MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h | 4 ++--
> MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h | 6 +++---
> MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h | 8 ++++----
> MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h | 8 ++++----
> MdePkg/Include/IndustryStandard/TcgStorageCore.h | 6 +++---
> MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h | 2 +-
> MdePkg/Include/Protocol/NvdimmLabel.h | 2 +-
> UefiPayloadPkg/Include/Coreboot.h | 10 +++++-----
> 11 files changed, 30 insertions(+), 30 deletions(-)
>
> diff --git a/EmbeddedPkg/Include/fdt.h b/EmbeddedPkg/Include/fdt.h
> index 120dbc8bc6..f64695da5c 100644
> --- a/EmbeddedPkg/Include/fdt.h
> +++ b/EmbeddedPkg/Include/fdt.h
> @@ -81,14 +81,14 @@ struct fdt_reserve_entry {
>
>
> struct fdt_node_header {
>
> fdt32_t tag;
>
> - char name[0];
>
> + char name[];
>
> };
>
>
>
> struct fdt_property {
>
> fdt32_t tag;
>
> fdt32_t len;
>
> fdt32_t nameoff;
>
> - char data[0];
>
> + char data[];
>
> };
>
>
>
> #endif /* !__ASSEMBLY */
>
> diff --git a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> b/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> index 432577bcfd..5fc5779e16 100644
> --- a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> +++ b/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> @@ -24,7 +24,7 @@ struct FRAME_BUFFER_CONFIGURE {
> EFI_PIXEL_BITMASK PixelMasks;
>
> INT8 PixelShl[4]; // R-G-B-Rsvd
>
> INT8 PixelShr[4]; // R-G-B-Rsvd
>
> - UINT8 LineBuffer[0];
>
> + UINT8 LineBuffer[];
>
> };
>
>
>
> CONST EFI_PIXEL_BITMASK mRgbPixelMasks = {
>
> diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> index b6bc91f46c..b5174a5042 100644
> --- a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> @@ -433,7 +433,7 @@ typedef union {
> typedef struct {
>
> UINT8 CompletionCode;
>
> IPMI_GET_MESSAGE_CHANNEL_NUMBER ChannelNumber;
>
> - UINT8 MessageData[0];
>
> + UINT8 MessageData[];
>
> } IPMI_GET_MESSAGE_RESPONSE;
>
>
>
> //
>
> @@ -457,12 +457,12 @@ typedef union {
> typedef struct {
>
> UINT8 CompletionCode;
>
> IPMI_SEND_MESSAGE_CHANNEL_NUMBER ChannelNumber;
>
> - UINT8 MessageData[0];
>
> + UINT8 MessageData[];
>
> } IPMI_SEND_MESSAGE_REQUEST;
>
>
>
> typedef struct {
>
> UINT8 CompletionCode;
>
> - UINT8 ResponseData[0];
>
> + UINT8 ResponseData[];
>
> } IPMI_SEND_MESSAGE_RESPONSE;
>
>
>
> //
>
> @@ -906,7 +906,7 @@ typedef union {
> typedef struct {
>
> IPMI_SET_USER_PASSWORD_USER_ID UserId;
>
> IPMI_SET_USER_PASSWORD_OPERATION Operation;
>
> - UINT8 PasswordData[0]; // 16 or 20 bytes, depending on the
> 'PasswordSize' field
>
> + UINT8 PasswordData[]; // 16 or 20 bytes, depending on the
> 'PasswordSize' field
>
> } IPMI_SET_USER_PASSWORD_REQUEST;
>
>
>
> //
>
> diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> b/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> index e3b8a62105..44024da69c 100644
> --- a/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> @@ -183,7 +183,7 @@ typedef union {
>
>
> typedef struct {
>
> IPMI_SET_BOOT_OPTIONS_PARAMETER_VALID ParameterValid;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_SET_BOOT_OPTIONS_REQUEST;
>
>
>
> typedef struct {
>
> @@ -415,7 +415,7 @@ typedef struct {
> UINT8 CompletionCode;
>
> IPMI_GET_BOOT_OPTIONS_PARAMETER_VERSION ParameterVersion;
>
> IPMI_GET_BOOT_OPTIONS_PARAMETER_VALID ParameterValid;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_GET_BOOT_OPTIONS_RESPONSE;
>
>
>
> //
>
> diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> b/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> index 553a69a472..755bcb67e5 100644
> --- a/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> @@ -76,7 +76,7 @@ typedef struct {
> typedef struct {
>
> UINT8 CompletionCode;
>
> UINT8 CountReturned;
>
> - UINT8 Data[0];
>
> + UINT8 Data[];
>
> } IPMI_READ_FRU_DATA_RESPONSE;
>
>
>
> //
>
> @@ -95,7 +95,7 @@ typedef struct {
> typedef struct {
>
> UINT8 DeviceId;
>
> UINT16 InventoryOffset;
>
> - UINT8 Data[0];
>
> + UINT8 Data[];
>
> } IPMI_WRITE_FRU_DATA_REQUEST;
>
>
>
> typedef struct {
>
> @@ -594,7 +594,7 @@ typedef struct {
> UINT16 RecordId;
>
> UINT8 OffsetIntoRecord;
>
> UINT8 InProgress;
>
> - UINT8 RecordData[0];
>
> + UINT8 RecordData[];
>
> } IPMI_PARTIAL_ADD_SEL_ENTRY_REQUEST;
>
>
>
> typedef struct {
>
> diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> b/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> index 2024c35f7f..273a162552 100644
> --- a/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> @@ -313,7 +313,7 @@ typedef union {
> typedef struct {
>
> IPMI_SET_LAN_CONFIG_CHANNEL_NUM ChannelNumber;
>
> UINT8 ParameterSelector;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_SET_LAN_CONFIGURATION_PARAMETERS_COMMAND_REQUEST;
>
>
>
> //
>
> @@ -343,7 +343,7 @@ typedef struct {
> typedef struct {
>
> UINT8 CompletionCode;
>
> UINT8 ParameterRevision;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_GET_LAN_CONFIGURATION_PARAMETERS_RESPONSE;
>
>
>
> //
>
> @@ -879,7 +879,7 @@ typedef union {
> typedef struct {
>
> IPMI_SET_SOL_CONFIG_PARAM_CHANNEL_NUM ChannelNumber;
>
> UINT8 ParameterSelector;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_SET_SOL_CONFIGURATION_PARAMETERS_REQUEST;
>
>
>
> //
>
> @@ -909,7 +909,7 @@ typedef struct {
> typedef struct {
>
> UINT8 CompletionCode;
>
> UINT8 ParameterRevision;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_GET_SOL_CONFIGURATION_PARAMETERS_RESPONSE;
>
>
>
> #pragma pack()
>
> diff --git a/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> b/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> index 9b7a5e838e..3e72812ea7 100644
> --- a/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> +++ b/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> @@ -92,7 +92,7 @@ typedef struct {
> typedef struct {
>
> UINT32 NextDataTransferHandle;
>
> UINT8 TransferFlag;
>
> - UINT8 Table[0];
>
> + UINT8 Table[];
>
> } PLDM_GET_SMBIOS_STRUCTURE_TABLE_RESPONSE;
>
>
>
> typedef struct {
>
> @@ -106,7 +106,7 @@ typedef struct {
> typedef struct {
>
> UINT32 DataTransferHandle;
>
> UINT8 TransferFlag;
>
> - UINT8 Table[0];
>
> + UINT8 Table[];
>
> } PLDM_SET_SMBIOS_STRUCTURE_TABLE_REQUEST;
>
>
>
> typedef struct {
>
> @@ -143,7 +143,7 @@ typedef struct {
> typedef struct {
>
> UINT32 NextDataTransferHandle;
>
> UINT8 TransferFlag;
>
> - UINT8 Table[0];
>
> + UINT8 Table[];
>
> } PLDM_GET_SMBIOS_STRUCTURE_BY_TYPE_RESPONSE;
>
>
>
> typedef struct {
>
> @@ -171,7 +171,7 @@ typedef struct {
> typedef struct {
>
> UINT32 NextDataTransferHandle;
>
> UINT8 TransferFlag;
>
> - UINT8 Table[0];
>
> + UINT8 Table[];
>
> } PLDM_GET_SMBIOS_STRUCTURE_BY_HANDLE_RESPONSE;
>
>
>
> typedef struct {
>
> diff --git a/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> b/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> index 1fae7b6e84..7502e3d46c 100644
> --- a/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> +++ b/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> @@ -38,7 +38,7 @@ typedef struct {
> UINT32 OutstandingDataBE;
>
> UINT32 MinTransferBE;
>
> UINT32 LengthBE;
>
> - UINT8 Payload[0];
>
> + UINT8 Payload[];
>
> } TCG_COM_PACKET;
>
>
>
> typedef struct {
>
> @@ -49,7 +49,7 @@ typedef struct {
> UINT16 AckTypeBE;
>
> UINT32 AcknowledgementBE;
>
> UINT32 LengthBE;
>
> - UINT8 Payload[0];
>
> + UINT8 Payload[];
>
> } TCG_PACKET;
>
>
>
> #define TCG_SUBPACKET_ALIGNMENT 4// 4-byte alignment per spec
>
> @@ -58,7 +58,7 @@ typedef struct {
> UINT8 ReservedBE[6];
>
> UINT16 KindBE;
>
> UINT32 LengthBE;
>
> - UINT8 Payload[0];
>
> + UINT8 Payload[];
>
> } TCG_SUB_PACKET;
>
>
>
> #define SUBPACKET_KIND_DATA 0x0000
>
> diff --git a/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> b/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> index 78acb4ddae..85d904ca9c 100644
> --- a/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> +++ b/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> @@ -101,7 +101,7 @@ struct undiconfig_table {
> struct {
>
> VOID *NII_InterfacePointer; ///< Pointer to the NII interface structure.
>
> VOID *DevicePathPointer; ///< Pointer to the device path for this NIC.
>
> - } NII_entry[1];
>
> + } NII_entry[];
>
> };
>
>
>
> extern EFI_GUID gEfiNetworkInterfaceIdentifierProtocolGuid;
>
> diff --git a/MdePkg/Include/Protocol/NvdimmLabel.h
> b/MdePkg/Include/Protocol/NvdimmLabel.h
> index e46999a3ab..91a9b675f9 100644
> --- a/MdePkg/Include/Protocol/NvdimmLabel.h
> +++ b/MdePkg/Include/Protocol/NvdimmLabel.h
> @@ -244,7 +244,7 @@ typedef struct {
> ///
>
> /// Array size is 1 if EFI_NVDIMM_LABEL_FLAGS_LOCAL is set indicating a Local
> Namespaces.
>
> ///
>
> - EFI_NVDIMM_LABEL_SET_COOKIE_MAP Mapping[0];
>
> + EFI_NVDIMM_LABEL_SET_COOKIE_MAP Mapping[];
>
> } EFI_NVDIMM_LABEL_SET_COOKIE_INFO;
>
>
>
> /**
>
> diff --git a/UefiPayloadPkg/Include/Coreboot.h
> b/UefiPayloadPkg/Include/Coreboot.h
> index 2d454f7c89..a53ede390c 100644
> --- a/UefiPayloadPkg/Include/Coreboot.h
> +++ b/UefiPayloadPkg/Include/Coreboot.h
> @@ -59,7 +59,7 @@ struct cbmem_root {
> UINT32 num_entries;
>
> UINT32 locked;
>
> UINT32 size;
>
> - struct cbmem_entry entries[0];
>
> + struct cbmem_entry entries[];
>
> };
>
>
>
> struct imd_entry {
>
> @@ -75,7 +75,7 @@ struct imd_root {
> UINT32 flags;
>
> UINT32 entry_align;
>
> UINT32 max_offset;
>
> - struct imd_entry entries[0];
>
> + struct imd_entry entries[];
>
> };
>
>
>
> struct cbuint64 {
>
> @@ -119,7 +119,7 @@ struct cb_memory_range {
> struct cb_memory {
>
> UINT32 tag;
>
> UINT32 size;
>
> - struct cb_memory_range map[0];
>
> + struct cb_memory_range map[];
>
> };
>
>
>
> #define CB_TAG_MAINBOARD 0x0003
>
> @@ -129,7 +129,7 @@ struct cb_mainboard {
> UINT32 size;
>
> UINT8 vendor_idx;
>
> UINT8 part_number_idx;
>
> - UINT8 strings[0];
>
> + UINT8 strings[];
>
> };
>
>
>
> #define CB_TAG_VERSION 0x0004
>
> @@ -146,7 +146,7 @@ struct cb_mainboard {
> struct cb_string {
>
> UINT32 tag;
>
> UINT32 size;
>
> - UINT8 string[0];
>
> + UINT8 string[];
>
> };
>
>
>
> #define CB_TAG_SERIAL 0x000f
>
> --
> 2.40.1
>
>
>
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^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [edk2-devel] [PATCH] Use C99 flexible arrays
2023-08-21 16:56 [edk2-devel] [PATCH] Use C99 flexible arrays ehaouas
@ 2023-08-22 15:28 ` Andrew Fish via groups.io
2023-08-23 21:41 ` Rebecca Cran
0 siblings, 1 reply; 9+ messages in thread
From: Andrew Fish via groups.io @ 2023-08-22 15:28 UTC (permalink / raw)
To: edk2-devel-groups-io, ehaouas; +Cc: Yao, Jiewen
[-- Attachment #1: Type: text/plain, Size: 14816 bytes --]
My understanding is zero length arrays have not been legal C code since C89. They may still function as a compiler extension.
struct foo {
size_t len;
char. Str[]0];
};
I seem to remember the reason we did not use the C99 flexible array members is back in the day as Visual Studio 2003 did not have proper C99 support, and did not support it.
struct foo {
size_t len;
char. Str[]];
};
I think the recommended C89 method for doing this is:
struct foo {
size_t len;
char. Str[]1];
};
But that is not backwards compatible as the sizes are different.
So it is probably good long term to move to valid C99, but we should verify we did not break anything.
Thanks,
Andrew Fish
> On Aug 21, 2023, at 9:56 AM, ehaouas <ehaouas@noos.fr> wrote:
>
>
> Hi,
>
> No, I didn't.
>
> De : "Yao, Jiewen"
> A : "devel@edk2.groups.io" ,"ehaouas@noos.fr" ,"Yao, Jiewen"
> Envoyé: lundi 21 Août 2023 16:35
> Objet : RE: [edk2-devel] [PATCH] Use C99 flexible arrays
>
> Hi
> This fix breaks the compatibility.
>
> Have you tested all features that depends on this data structure?
>
> Thank you
> Yao, Jiewen
>
> > -----Original Message-----
> > From: devel@edk2.groups.io On Behalf Of Elyes Haouas
> > Sent: Sunday, August 20, 2023 8:07 PM
> > To: devel@edk2.groups.io
> > Cc: Elyes Haouas
> > Subject: [edk2-devel] [PATCH] Use C99 flexible arrays
> >
> > Use C99 flexible arrays instead of older style of one-element or
> > zero-length arrays.
> > It allows the compiler to generate errors when the flexible array does
> > not occur at the end in the structure.
> >
> > Signed-off-by: Elyes Haouas
> > ---
> > EmbeddedPkg/Include/fdt.h | 4 ++--
> > .../Library/FrameBufferBltLib/FrameBufferBltLib.c | 2 +-
> > MdePkg/Include/IndustryStandard/IpmiNetFnApp.h | 8 ++++----
> > MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h | 4 ++--
> > MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h | 6 +++---
> > MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h | 8 ++++----
> > MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h | 8 ++++----
> > MdePkg/Include/IndustryStandard/TcgStorageCore.h | 6 +++---
> > MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h | 2 +-
> > MdePkg/Include/Protocol/NvdimmLabel.h | 2 +-
> > UefiPayloadPkg/Include/Coreboot.h | 10 +++++-----
> > 11 files changed, 30 insertions(+), 30 deletions(-)
> >
> > diff --git a/EmbeddedPkg/Include/fdt.h b/EmbeddedPkg/Include/fdt.h
> > index 120dbc8bc6..f64695da5c 100644
> > --- a/EmbeddedPkg/Include/fdt.h
> > +++ b/EmbeddedPkg/Include/fdt.h
> > @@ -81,14 +81,14 @@ struct fdt_reserve_entry {
> >
> >
> > struct fdt_node_header {
> >
> > fdt32_t tag;
> >
> > - char name[0];
> >
> > + char name[];
> >
> > };
> >
> >
> >
> > struct fdt_property {
> >
> > fdt32_t tag;
> >
> > fdt32_t len;
> >
> > fdt32_t nameoff;
> >
> > - char data[0];
> >
> > + char data[];
> >
> > };
> >
> >
> >
> > #endif /* !__ASSEMBLY */
> >
> > diff --git a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> > b/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> > index 432577bcfd..5fc5779e16 100644
> > --- a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> > +++ b/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> > @@ -24,7 +24,7 @@ struct FRAME_BUFFER_CONFIGURE {
> > EFI_PIXEL_BITMASK PixelMasks;
> >
> > INT8 PixelShl[4]; // R-G-B-Rsvd
> >
> > INT8 PixelShr[4]; // R-G-B-Rsvd
> >
> > - UINT8 LineBuffer[0];
> >
> > + UINT8 LineBuffer[];
> >
> > };
> >
> >
> >
> > CONST EFI_PIXEL_BITMASK mRgbPixelMasks = {
> >
> > diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> > b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> > index b6bc91f46c..b5174a5042 100644
> > --- a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> > +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> > @@ -433,7 +433,7 @@ typedef union {
> > typedef struct {
> >
> > UINT8 CompletionCode;
> >
> > IPMI_GET_MESSAGE_CHANNEL_NUMBER ChannelNumber;
> >
> > - UINT8 MessageData[0];
> >
> > + UINT8 MessageData[];
> >
> > } IPMI_GET_MESSAGE_RESPONSE;
> >
> >
> >
> > //
> >
> > @@ -457,12 +457,12 @@ typedef union {
> > typedef struct {
> >
> > UINT8 CompletionCode;
> >
> > IPMI_SEND_MESSAGE_CHANNEL_NUMBER ChannelNumber;
> >
> > - UINT8 MessageData[0];
> >
> > + UINT8 MessageData[];
> >
> > } IPMI_SEND_MESSAGE_REQUEST;
> >
> >
> >
> > typedef struct {
> >
> > UINT8 CompletionCode;
> >
> > - UINT8 ResponseData[0];
> >
> > + UINT8 ResponseData[];
> >
> > } IPMI_SEND_MESSAGE_RESPONSE;
> >
> >
> >
> > //
> >
> > @@ -906,7 +906,7 @@ typedef union {
> > typedef struct {
> >
> > IPMI_SET_USER_PASSWORD_USER_ID UserId;
> >
> > IPMI_SET_USER_PASSWORD_OPERATION Operation;
> >
> > - UINT8 PasswordData[0]; // 16 or 20 bytes, depending on the
> > 'PasswordSize' field
> >
> > + UINT8 PasswordData[]; // 16 or 20 bytes, depending on the
> > 'PasswordSize' field
> >
> > } IPMI_SET_USER_PASSWORD_REQUEST;
> >
> >
> >
> > //
> >
> > diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> > b/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> > index e3b8a62105..44024da69c 100644
> > --- a/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> > +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> > @@ -183,7 +183,7 @@ typedef union {
> >
> >
> > typedef struct {
> >
> > IPMI_SET_BOOT_OPTIONS_PARAMETER_VALID ParameterValid;
> >
> > - UINT8 ParameterData[0];
> >
> > + UINT8 ParameterData[];
> >
> > } IPMI_SET_BOOT_OPTIONS_REQUEST;
> >
> >
> >
> > typedef struct {
> >
> > @@ -415,7 +415,7 @@ typedef struct {
> > UINT8 CompletionCode;
> >
> > IPMI_GET_BOOT_OPTIONS_PARAMETER_VERSION ParameterVersion;
> >
> > IPMI_GET_BOOT_OPTIONS_PARAMETER_VALID ParameterValid;
> >
> > - UINT8 ParameterData[0];
> >
> > + UINT8 ParameterData[];
> >
> > } IPMI_GET_BOOT_OPTIONS_RESPONSE;
> >
> >
> >
> > //
> >
> > diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> > b/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> > index 553a69a472..755bcb67e5 100644
> > --- a/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> > +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> > @@ -76,7 +76,7 @@ typedef struct {
> > typedef struct {
> >
> > UINT8 CompletionCode;
> >
> > UINT8 CountReturned;
> >
> > - UINT8 Data[0];
> >
> > + UINT8 Data[];
> >
> > } IPMI_READ_FRU_DATA_RESPONSE;
> >
> >
> >
> > //
> >
> > @@ -95,7 +95,7 @@ typedef struct {
> > typedef struct {
> >
> > UINT8 DeviceId;
> >
> > UINT16 InventoryOffset;
> >
> > - UINT8 Data[0];
> >
> > + UINT8 Data[];
> >
> > } IPMI_WRITE_FRU_DATA_REQUEST;
> >
> >
> >
> > typedef struct {
> >
> > @@ -594,7 +594,7 @@ typedef struct {
> > UINT16 RecordId;
> >
> > UINT8 OffsetIntoRecord;
> >
> > UINT8 InProgress;
> >
> > - UINT8 RecordData[0];
> >
> > + UINT8 RecordData[];
> >
> > } IPMI_PARTIAL_ADD_SEL_ENTRY_REQUEST;
> >
> >
> >
> > typedef struct {
> >
> > diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> > b/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> > index 2024c35f7f..273a162552 100644
> > --- a/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> > +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> > @@ -313,7 +313,7 @@ typedef union {
> > typedef struct {
> >
> > IPMI_SET_LAN_CONFIG_CHANNEL_NUM ChannelNumber;
> >
> > UINT8 ParameterSelector;
> >
> > - UINT8 ParameterData[0];
> >
> > + UINT8 ParameterData[];
> >
> > } IPMI_SET_LAN_CONFIGURATION_PARAMETERS_COMMAND_REQUEST;
> >
> >
> >
> > //
> >
> > @@ -343,7 +343,7 @@ typedef struct {
> > typedef struct {
> >
> > UINT8 CompletionCode;
> >
> > UINT8 ParameterRevision;
> >
> > - UINT8 ParameterData[0];
> >
> > + UINT8 ParameterData[];
> >
> > } IPMI_GET_LAN_CONFIGURATION_PARAMETERS_RESPONSE;
> >
> >
> >
> > //
> >
> > @@ -879,7 +879,7 @@ typedef union {
> > typedef struct {
> >
> > IPMI_SET_SOL_CONFIG_PARAM_CHANNEL_NUM ChannelNumber;
> >
> > UINT8 ParameterSelector;
> >
> > - UINT8 ParameterData[0];
> >
> > + UINT8 ParameterData[];
> >
> > } IPMI_SET_SOL_CONFIGURATION_PARAMETERS_REQUEST;
> >
> >
> >
> > //
> >
> > @@ -909,7 +909,7 @@ typedef struct {
> > typedef struct {
> >
> > UINT8 CompletionCode;
> >
> > UINT8 ParameterRevision;
> >
> > - UINT8 ParameterData[0];
> >
> > + UINT8 ParameterData[];
> >
> > } IPMI_GET_SOL_CONFIGURATION_PARAMETERS_RESPONSE;
> >
> >
> >
> > #pragma pack()
> >
> > diff --git a/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> > b/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> > index 9b7a5e838e..3e72812ea7 100644
> > --- a/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> > +++ b/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> > @@ -92,7 +92,7 @@ typedef struct {
> > typedef struct {
> >
> > UINT32 NextDataTransferHandle;
> >
> > UINT8 TransferFlag;
> >
> > - UINT8 Table[0];
> >
> > + UINT8 Table[];
> >
> > } PLDM_GET_SMBIOS_STRUCTURE_TABLE_RESPONSE;
> >
> >
> >
> > typedef struct {
> >
> > @@ -106,7 +106,7 @@ typedef struct {
> > typedef struct {
> >
> > UINT32 DataTransferHandle;
> >
> > UINT8 TransferFlag;
> >
> > - UINT8 Table[0];
> >
> > + UINT8 Table[];
> >
> > } PLDM_SET_SMBIOS_STRUCTURE_TABLE_REQUEST;
> >
> >
> >
> > typedef struct {
> >
> > @@ -143,7 +143,7 @@ typedef struct {
> > typedef struct {
> >
> > UINT32 NextDataTransferHandle;
> >
> > UINT8 TransferFlag;
> >
> > - UINT8 Table[0];
> >
> > + UINT8 Table[];
> >
> > } PLDM_GET_SMBIOS_STRUCTURE_BY_TYPE_RESPONSE;
> >
> >
> >
> > typedef struct {
> >
> > @@ -171,7 +171,7 @@ typedef struct {
> > typedef struct {
> >
> > UINT32 NextDataTransferHandle;
> >
> > UINT8 TransferFlag;
> >
> > - UINT8 Table[0];
> >
> > + UINT8 Table[];
> >
> > } PLDM_GET_SMBIOS_STRUCTURE_BY_HANDLE_RESPONSE;
> >
> >
> >
> > typedef struct {
> >
> > diff --git a/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> > b/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> > index 1fae7b6e84..7502e3d46c 100644
> > --- a/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> > +++ b/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> > @@ -38,7 +38,7 @@ typedef struct {
> > UINT32 OutstandingDataBE;
> >
> > UINT32 MinTransferBE;
> >
> > UINT32 LengthBE;
> >
> > - UINT8 Payload[0];
> >
> > + UINT8 Payload[];
> >
> > } TCG_COM_PACKET;
> >
> >
> >
> > typedef struct {
> >
> > @@ -49,7 +49,7 @@ typedef struct {
> > UINT16 AckTypeBE;
> >
> > UINT32 AcknowledgementBE;
> >
> > UINT32 LengthBE;
> >
> > - UINT8 Payload[0];
> >
> > + UINT8 Payload[];
> >
> > } TCG_PACKET;
> >
> >
> >
> > #define TCG_SUBPACKET_ALIGNMENT 4// 4-byte alignment per spec
> >
> > @@ -58,7 +58,7 @@ typedef struct {
> > UINT8 ReservedBE[6];
> >
> > UINT16 KindBE;
> >
> > UINT32 LengthBE;
> >
> > - UINT8 Payload[0];
> >
> > + UINT8 Payload[];
> >
> > } TCG_SUB_PACKET;
> >
> >
> >
> > #define SUBPACKET_KIND_DATA 0x0000
> >
> > diff --git a/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> > b/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> > index 78acb4ddae..85d904ca9c 100644
> > --- a/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> > +++ b/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> > @@ -101,7 +101,7 @@ struct undiconfig_table {
> > struct {
> >
> > VOID *NII_InterfacePointer; ///< Pointer to the NII interface structure.
> >
> > VOID *DevicePathPointer; ///< Pointer to the device path for this NIC.
> >
> > - } NII_entry[1];
> >
> > + } NII_entry[];
> >
> > };
> >
> >
> >
> > extern EFI_GUID gEfiNetworkInterfaceIdentifierProtocolGuid;
> >
> > diff --git a/MdePkg/Include/Protocol/NvdimmLabel.h
> > b/MdePkg/Include/Protocol/NvdimmLabel.h
> > index e46999a3ab..91a9b675f9 100644
> > --- a/MdePkg/Include/Protocol/NvdimmLabel.h
> > +++ b/MdePkg/Include/Protocol/NvdimmLabel.h
> > @@ -244,7 +244,7 @@ typedef struct {
> > ///
> >
> > /// Array size is 1 if EFI_NVDIMM_LABEL_FLAGS_LOCAL is set indicating a Local
> > Namespaces.
> >
> > ///
> >
> > - EFI_NVDIMM_LABEL_SET_COOKIE_MAP Mapping[0];
> >
> > + EFI_NVDIMM_LABEL_SET_COOKIE_MAP Mapping[];
> >
> > } EFI_NVDIMM_LABEL_SET_COOKIE_INFO;
> >
> >
> >
> > /**
> >
> > diff --git a/UefiPayloadPkg/Include/Coreboot.h
> > b/UefiPayloadPkg/Include/Coreboot.h
> > index 2d454f7c89..a53ede390c 100644
> > --- a/UefiPayloadPkg/Include/Coreboot.h
> > +++ b/UefiPayloadPkg/Include/Coreboot.h
> > @@ -59,7 +59,7 @@ struct cbmem_root {
> > UINT32 num_entries;
> >
> > UINT32 locked;
> >
> > UINT32 size;
> >
> > - struct cbmem_entry entries[0];
> >
> > + struct cbmem_entry entries[];
> >
> > };
> >
> >
> >
> > struct imd_entry {
> >
> > @@ -75,7 +75,7 @@ struct imd_root {
> > UINT32 flags;
> >
> > UINT32 entry_align;
> >
> > UINT32 max_offset;
> >
> > - struct imd_entry entries[0];
> >
> > + struct imd_entry entries[];
> >
> > };
> >
> >
> >
> > struct cbuint64 {
> >
> > @@ -119,7 +119,7 @@ struct cb_memory_range {
> > struct cb_memory {
> >
> > UINT32 tag;
> >
> > UINT32 size;
> >
> > - struct cb_memory_range map[0];
> >
> > + struct cb_memory_range map[];
> >
> > };
> >
> >
> >
> > #define CB_TAG_MAINBOARD 0x0003
> >
> > @@ -129,7 +129,7 @@ struct cb_mainboard {
> > UINT32 size;
> >
> > UINT8 vendor_idx;
> >
> > UINT8 part_number_idx;
> >
> > - UINT8 strings[0];
> >
> > + UINT8 strings[];
> >
> > };
> >
> >
> >
> > #define CB_TAG_VERSION 0x0004
> >
> > @@ -146,7 +146,7 @@ struct cb_mainboard {
> > struct cb_string {
> >
> > UINT32 tag;
> >
> > UINT32 size;
> >
> > - UINT8 string[0];
> >
> > + UINT8 string[];
> >
> > };
> >
> >
> >
> > #define CB_TAG_SERIAL 0x000f
> >
> > --
> > 2.40.1
> >
> >
> >
> > -=-=-=-=-=-=
> > Groups.io Links: You receive all messages sent to this group.
> > View/Reply Online (#107898): https://edk2.groups.io/g/devel/message/107898
> > Mute This Topic: https://groups.io/mt/100861513/1772286
> > Group Owner: devel+owner@edk2.groups.io
> > Unsubscribe: https://edk2.groups.io/g/devel/unsub [jiewen.yao@intel.com]
> > -=-=-=-=-=-=
> >
>
>
-=-=-=-=-=-=-=-=-=-=-=-
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^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [edk2-devel] [PATCH] Use C99 flexible arrays
2023-08-22 15:28 ` Andrew Fish via groups.io
@ 2023-08-23 21:41 ` Rebecca Cran
2023-08-24 0:36 ` Pedro Falcato
2023-08-24 15:19 ` Oliver Smith-Denny
0 siblings, 2 replies; 9+ messages in thread
From: Rebecca Cran @ 2023-08-23 21:41 UTC (permalink / raw)
To: devel, afish, ehaouas; +Cc: Yao, Jiewen
With Visual Studio 2019 adding C11 and C17 support as first-class
features, I think we should be safe nowadays to rely on them. But we
should check if older versions that we still support (VS 2015 etc.)
support them too.
https://devblogs.microsoft.com/cppblog/c11-and-c17-standard-support-arriving-in-msvc/
--
Rebecca Cran
On 8/22/23 09:28, Andrew Fish via groups.io wrote:
> My understanding is zero length arrays have not been legal C code
> since C89. They may still function as a compiler extension.
>
> struct foo {
> size_t len;
> char. Str[]0];
> };
>
> I seem to remember the reason we did not use the C99 flexible array
> members is back in the day as Visual Studio 2003 did not have proper
> C99 support, and did not support it.
>
> struct foo {
> size_t len;
> char. Str[]];
> };
>
> I think the recommended C89 method for doing this is:
>
> struct foo {
> size_t len;
> char. Str[]1];
> };
>
> But that is not backwards compatible as the sizes are different.
>
> So it is probably good long term to move to valid C99, but we should
> verify we did not break anything.
>
> Thanks,
>
> Andrew Fish
>
>
>> On Aug 21, 2023, at 9:56 AM, ehaouas <ehaouas@noos.fr> wrote:
>>
>>
>> Hi,
>>
>> No, I didn't.
>> De : "Yao, Jiewen"
>> A : "devel@edk2.groups.io" ,"ehaouas@noos.fr" ,"Yao, Jiewen"
>> Envoyé: lundi 21 Août 2023 16:35
>> Objet : RE: [edk2-devel] [PATCH] Use C99 flexible arrays
>> Hi
>> This fix breaks the compatibility.
>>
>> Have you tested all features that depends on this data structure?
>>
>> Thank you
>> Yao, Jiewen
>>
>> > -----Original Message-----
>> > From: devel@edk2.groups.io On Behalf Of Elyes Haouas
>> > Sent: Sunday, August 20, 2023 8:07 PM
>> > To: devel@edk2.groups.io
>> > Cc: Elyes Haouas
>> > Subject: [edk2-devel] [PATCH] Use C99 flexible arrays
>> >
>> > Use C99 flexible arrays instead of older style of one-element or
>> > zero-length arrays.
>> > It allows the compiler to generate errors when the flexible array does
>> > not occur at the end in the structure.
>> >
>> > Signed-off-by: Elyes Haouas
>> > ---
>> > EmbeddedPkg/Include/fdt.h | 4 ++--
>> > .../Library/FrameBufferBltLib/FrameBufferBltLib.c | 2 +-
>> > MdePkg/Include/IndustryStandard/IpmiNetFnApp.h | 8 ++++----
>> > MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h | 4 ++--
>> > MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h | 6 +++---
>> > MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h | 8 ++++----
>> > MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h | 8 ++++----
>> > MdePkg/Include/IndustryStandard/TcgStorageCore.h | 6 +++---
>> > MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h | 2 +-
>> > MdePkg/Include/Protocol/NvdimmLabel.h | 2 +-
>> > UefiPayloadPkg/Include/Coreboot.h | 10 +++++-----
>> > 11 files changed, 30 insertions(+), 30 deletions(-)
>> >
>> > diff --git a/EmbeddedPkg/Include/fdt.h b/EmbeddedPkg/Include/fdt.h
>> > index 120dbc8bc6..f64695da5c 100644
>> > --- a/EmbeddedPkg/Include/fdt.h
>> > +++ b/EmbeddedPkg/Include/fdt.h
>> > @@ -81,14 +81,14 @@ struct fdt_reserve_entry {
>> >
>> >
>> > struct fdt_node_header {
>> >
>> > fdt32_t tag;
>> >
>> > - char name[0];
>> >
>> > + char name[];
>> >
>> > };
>> >
>> >
>> >
>> > struct fdt_property {
>> >
>> > fdt32_t tag;
>> >
>> > fdt32_t len;
>> >
>> > fdt32_t nameoff;
>> >
>> > - char data[0];
>> >
>> > + char data[];
>> >
>> > };
>> >
>> >
>> >
>> > #endif /* !__ASSEMBLY */
>> >
>> > diff --git a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
>> > b/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
>> > index 432577bcfd..5fc5779e16 100644
>> > --- a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
>> > +++ b/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
>> > @@ -24,7 +24,7 @@ struct FRAME_BUFFER_CONFIGURE {
>> > EFI_PIXEL_BITMASK PixelMasks;
>> >
>> > INT8 PixelShl[4]; // R-G-B-Rsvd
>> >
>> > INT8 PixelShr[4]; // R-G-B-Rsvd
>> >
>> > - UINT8 LineBuffer[0];
>> >
>> > + UINT8 LineBuffer[];
>> >
>> > };
>> >
>> >
>> >
>> > CONST EFI_PIXEL_BITMASK mRgbPixelMasks = {
>> >
>> > diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
>> > b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
>> > index b6bc91f46c..b5174a5042 100644
>> > --- a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
>> > +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
>> > @@ -433,7 +433,7 @@ typedef union {
>> > typedef struct {
>> >
>> > UINT8 CompletionCode;
>> >
>> > IPMI_GET_MESSAGE_CHANNEL_NUMBER ChannelNumber;
>> >
>> > - UINT8 MessageData[0];
>> >
>> > + UINT8 MessageData[];
>> >
>> > } IPMI_GET_MESSAGE_RESPONSE;
>> >
>> >
>> >
>> > //
>> >
>> > @@ -457,12 +457,12 @@ typedef union {
>> > typedef struct {
>> >
>> > UINT8 CompletionCode;
>> >
>> > IPMI_SEND_MESSAGE_CHANNEL_NUMBER ChannelNumber;
>> >
>> > - UINT8 MessageData[0];
>> >
>> > + UINT8 MessageData[];
>> >
>> > } IPMI_SEND_MESSAGE_REQUEST;
>> >
>> >
>> >
>> > typedef struct {
>> >
>> > UINT8 CompletionCode;
>> >
>> > - UINT8 ResponseData[0];
>> >
>> > + UINT8 ResponseData[];
>> >
>> > } IPMI_SEND_MESSAGE_RESPONSE;
>> >
>> >
>> >
>> > //
>> >
>> > @@ -906,7 +906,7 @@ typedef union {
>> > typedef struct {
>> >
>> > IPMI_SET_USER_PASSWORD_USER_ID UserId;
>> >
>> > IPMI_SET_USER_PASSWORD_OPERATION Operation;
>> >
>> > - UINT8 PasswordData[0]; // 16 or 20 bytes, depending on the
>> > 'PasswordSize' field
>> >
>> > + UINT8 PasswordData[]; // 16 or 20 bytes, depending on the
>> > 'PasswordSize' field
>> >
>> > } IPMI_SET_USER_PASSWORD_REQUEST;
>> >
>> >
>> >
>> > //
>> >
>> > diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
>> > b/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
>> > index e3b8a62105..44024da69c 100644
>> > --- a/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
>> > +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
>> > @@ -183,7 +183,7 @@ typedef union {
>> >
>> >
>> > typedef struct {
>> >
>> > IPMI_SET_BOOT_OPTIONS_PARAMETER_VALID ParameterValid;
>> >
>> > - UINT8 ParameterData[0];
>> >
>> > + UINT8 ParameterData[];
>> >
>> > } IPMI_SET_BOOT_OPTIONS_REQUEST;
>> >
>> >
>> >
>> > typedef struct {
>> >
>> > @@ -415,7 +415,7 @@ typedef struct {
>> > UINT8 CompletionCode;
>> >
>> > IPMI_GET_BOOT_OPTIONS_PARAMETER_VERSION ParameterVersion;
>> >
>> > IPMI_GET_BOOT_OPTIONS_PARAMETER_VALID ParameterValid;
>> >
>> > - UINT8 ParameterData[0];
>> >
>> > + UINT8 ParameterData[];
>> >
>> > } IPMI_GET_BOOT_OPTIONS_RESPONSE;
>> >
>> >
>> >
>> > //
>> >
>> > diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
>> > b/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
>> > index 553a69a472..755bcb67e5 100644
>> > --- a/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
>> > +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
>> > @@ -76,7 +76,7 @@ typedef struct {
>> > typedef struct {
>> >
>> > UINT8 CompletionCode;
>> >
>> > UINT8 CountReturned;
>> >
>> > - UINT8 Data[0];
>> >
>> > + UINT8 Data[];
>> >
>> > } IPMI_READ_FRU_DATA_RESPONSE;
>> >
>> >
>> >
>> > //
>> >
>> > @@ -95,7 +95,7 @@ typedef struct {
>> > typedef struct {
>> >
>> > UINT8 DeviceId;
>> >
>> > UINT16 InventoryOffset;
>> >
>> > - UINT8 Data[0];
>> >
>> > + UINT8 Data[];
>> >
>> > } IPMI_WRITE_FRU_DATA_REQUEST;
>> >
>> >
>> >
>> > typedef struct {
>> >
>> > @@ -594,7 +594,7 @@ typedef struct {
>> > UINT16 RecordId;
>> >
>> > UINT8 OffsetIntoRecord;
>> >
>> > UINT8 InProgress;
>> >
>> > - UINT8 RecordData[0];
>> >
>> > + UINT8 RecordData[];
>> >
>> > } IPMI_PARTIAL_ADD_SEL_ENTRY_REQUEST;
>> >
>> >
>> >
>> > typedef struct {
>> >
>> > diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
>> > b/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
>> > index 2024c35f7f..273a162552 100644
>> > --- a/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
>> > +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
>> > @@ -313,7 +313,7 @@ typedef union {
>> > typedef struct {
>> >
>> > IPMI_SET_LAN_CONFIG_CHANNEL_NUM ChannelNumber;
>> >
>> > UINT8 ParameterSelector;
>> >
>> > - UINT8 ParameterData[0];
>> >
>> > + UINT8 ParameterData[];
>> >
>> > } IPMI_SET_LAN_CONFIGURATION_PARAMETERS_COMMAND_REQUEST;
>> >
>> >
>> >
>> > //
>> >
>> > @@ -343,7 +343,7 @@ typedef struct {
>> > typedef struct {
>> >
>> > UINT8 CompletionCode;
>> >
>> > UINT8 ParameterRevision;
>> >
>> > - UINT8 ParameterData[0];
>> >
>> > + UINT8 ParameterData[];
>> >
>> > } IPMI_GET_LAN_CONFIGURATION_PARAMETERS_RESPONSE;
>> >
>> >
>> >
>> > //
>> >
>> > @@ -879,7 +879,7 @@ typedef union {
>> > typedef struct {
>> >
>> > IPMI_SET_SOL_CONFIG_PARAM_CHANNEL_NUM ChannelNumber;
>> >
>> > UINT8 ParameterSelector;
>> >
>> > - UINT8 ParameterData[0];
>> >
>> > + UINT8 ParameterData[];
>> >
>> > } IPMI_SET_SOL_CONFIGURATION_PARAMETERS_REQUEST;
>> >
>> >
>> >
>> > //
>> >
>> > @@ -909,7 +909,7 @@ typedef struct {
>> > typedef struct {
>> >
>> > UINT8 CompletionCode;
>> >
>> > UINT8 ParameterRevision;
>> >
>> > - UINT8 ParameterData[0];
>> >
>> > + UINT8 ParameterData[];
>> >
>> > } IPMI_GET_SOL_CONFIGURATION_PARAMETERS_RESPONSE;
>> >
>> >
>> >
>> > #pragma pack()
>> >
>> > diff --git a/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
>> > b/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
>> > index 9b7a5e838e..3e72812ea7 100644
>> > --- a/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
>> > +++ b/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
>> > @@ -92,7 +92,7 @@ typedef struct {
>> > typedef struct {
>> >
>> > UINT32 NextDataTransferHandle;
>> >
>> > UINT8 TransferFlag;
>> >
>> > - UINT8 Table[0];
>> >
>> > + UINT8 Table[];
>> >
>> > } PLDM_GET_SMBIOS_STRUCTURE_TABLE_RESPONSE;
>> >
>> >
>> >
>> > typedef struct {
>> >
>> > @@ -106,7 +106,7 @@ typedef struct {
>> > typedef struct {
>> >
>> > UINT32 DataTransferHandle;
>> >
>> > UINT8 TransferFlag;
>> >
>> > - UINT8 Table[0];
>> >
>> > + UINT8 Table[];
>> >
>> > } PLDM_SET_SMBIOS_STRUCTURE_TABLE_REQUEST;
>> >
>> >
>> >
>> > typedef struct {
>> >
>> > @@ -143,7 +143,7 @@ typedef struct {
>> > typedef struct {
>> >
>> > UINT32 NextDataTransferHandle;
>> >
>> > UINT8 TransferFlag;
>> >
>> > - UINT8 Table[0];
>> >
>> > + UINT8 Table[];
>> >
>> > } PLDM_GET_SMBIOS_STRUCTURE_BY_TYPE_RESPONSE;
>> >
>> >
>> >
>> > typedef struct {
>> >
>> > @@ -171,7 +171,7 @@ typedef struct {
>> > typedef struct {
>> >
>> > UINT32 NextDataTransferHandle;
>> >
>> > UINT8 TransferFlag;
>> >
>> > - UINT8 Table[0];
>> >
>> > + UINT8 Table[];
>> >
>> > } PLDM_GET_SMBIOS_STRUCTURE_BY_HANDLE_RESPONSE;
>> >
>> >
>> >
>> > typedef struct {
>> >
>> > diff --git a/MdePkg/Include/IndustryStandard/TcgStorageCore.h
>> > b/MdePkg/Include/IndustryStandard/TcgStorageCore.h
>> > index 1fae7b6e84..7502e3d46c 100644
>> > --- a/MdePkg/Include/IndustryStandard/TcgStorageCore.h
>> > +++ b/MdePkg/Include/IndustryStandard/TcgStorageCore.h
>> > @@ -38,7 +38,7 @@ typedef struct {
>> > UINT32 OutstandingDataBE;
>> >
>> > UINT32 MinTransferBE;
>> >
>> > UINT32 LengthBE;
>> >
>> > - UINT8 Payload[0];
>> >
>> > + UINT8 Payload[];
>> >
>> > } TCG_COM_PACKET;
>> >
>> >
>> >
>> > typedef struct {
>> >
>> > @@ -49,7 +49,7 @@ typedef struct {
>> > UINT16 AckTypeBE;
>> >
>> > UINT32 AcknowledgementBE;
>> >
>> > UINT32 LengthBE;
>> >
>> > - UINT8 Payload[0];
>> >
>> > + UINT8 Payload[];
>> >
>> > } TCG_PACKET;
>> >
>> >
>> >
>> > #define TCG_SUBPACKET_ALIGNMENT 4// 4-byte alignment per spec
>> >
>> > @@ -58,7 +58,7 @@ typedef struct {
>> > UINT8 ReservedBE[6];
>> >
>> > UINT16 KindBE;
>> >
>> > UINT32 LengthBE;
>> >
>> > - UINT8 Payload[0];
>> >
>> > + UINT8 Payload[];
>> >
>> > } TCG_SUB_PACKET;
>> >
>> >
>> >
>> > #define SUBPACKET_KIND_DATA 0x0000
>> >
>> > diff --git a/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
>> > b/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
>> > index 78acb4ddae..85d904ca9c 100644
>> > --- a/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
>> > +++ b/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
>> > @@ -101,7 +101,7 @@ struct undiconfig_table {
>> > struct {
>> >
>> > VOID *NII_InterfacePointer; ///< Pointer to the NII interface
>> structure.
>> >
>> > VOID *DevicePathPointer; ///< Pointer to the device path for this NIC.
>> >
>> > - } NII_entry[1];
>> >
>> > + } NII_entry[];
>> >
>> > };
>> >
>> >
>> >
>> > extern EFI_GUID gEfiNetworkInterfaceIdentifierProtocolGuid;
>> >
>> > diff --git a/MdePkg/Include/Protocol/NvdimmLabel.h
>> > b/MdePkg/Include/Protocol/NvdimmLabel.h
>> > index e46999a3ab..91a9b675f9 100644
>> > --- a/MdePkg/Include/Protocol/NvdimmLabel.h
>> > +++ b/MdePkg/Include/Protocol/NvdimmLabel.h
>> > @@ -244,7 +244,7 @@ typedef struct {
>> > ///
>> >
>> > /// Array size is 1 if EFI_NVDIMM_LABEL_FLAGS_LOCAL is set
>> indicating a Local
>> > Namespaces.
>> >
>> > ///
>> >
>> > - EFI_NVDIMM_LABEL_SET_COOKIE_MAP Mapping[0];
>> >
>> > + EFI_NVDIMM_LABEL_SET_COOKIE_MAP Mapping[];
>> >
>> > } EFI_NVDIMM_LABEL_SET_COOKIE_INFO;
>> >
>> >
>> >
>> > /**
>> >
>> > diff --git a/UefiPayloadPkg/Include/Coreboot.h
>> > b/UefiPayloadPkg/Include/Coreboot.h
>> > index 2d454f7c89..a53ede390c 100644
>> > --- a/UefiPayloadPkg/Include/Coreboot.h
>> > +++ b/UefiPayloadPkg/Include/Coreboot.h
>> > @@ -59,7 +59,7 @@ struct cbmem_root {
>> > UINT32 num_entries;
>> >
>> > UINT32 locked;
>> >
>> > UINT32 size;
>> >
>> > - struct cbmem_entry entries[0];
>> >
>> > + struct cbmem_entry entries[];
>> >
>> > };
>> >
>> >
>> >
>> > struct imd_entry {
>> >
>> > @@ -75,7 +75,7 @@ struct imd_root {
>> > UINT32 flags;
>> >
>> > UINT32 entry_align;
>> >
>> > UINT32 max_offset;
>> >
>> > - struct imd_entry entries[0];
>> >
>> > + struct imd_entry entries[];
>> >
>> > };
>> >
>> >
>> >
>> > struct cbuint64 {
>> >
>> > @@ -119,7 +119,7 @@ struct cb_memory_range {
>> > struct cb_memory {
>> >
>> > UINT32 tag;
>> >
>> > UINT32 size;
>> >
>> > - struct cb_memory_range map[0];
>> >
>> > + struct cb_memory_range map[];
>> >
>> > };
>> >
>> >
>> >
>> > #define CB_TAG_MAINBOARD 0x0003
>> >
>> > @@ -129,7 +129,7 @@ struct cb_mainboard {
>> > UINT32 size;
>> >
>> > UINT8 vendor_idx;
>> >
>> > UINT8 part_number_idx;
>> >
>> > - UINT8 strings[0];
>> >
>> > + UINT8 strings[];
>> >
>> > };
>> >
>> >
>> >
>> > #define CB_TAG_VERSION 0x0004
>> >
>> > @@ -146,7 +146,7 @@ struct cb_mainboard {
>> > struct cb_string {
>> >
>> > UINT32 tag;
>> >
>> > UINT32 size;
>> >
>> > - UINT8 string[0];
>> >
>> > + UINT8 string[];
>> >
>> > };
>> >
>> >
>> >
>> > #define CB_TAG_SERIAL 0x000f
>> >
>> > --
>> > 2.40.1
>> >
>> >
>> >
>> > -=-=-=-=-=-=
>> > Groups.io Links: You receive all messages sent to this group.
>> > View/Reply Online (#107898):
>> https://edk2.groups.io/g/devel/message/107898
>> > Mute This Topic: https://groups.io/mt/100861513/1772286
>> > Group Owner: devel+owner@edk2.groups.io
>> > Unsubscribe: https://edk2.groups.io/g/devel/unsub
>> [jiewen.yao@intel.com]
>> > -=-=-=-=-=-=
>> >
>
>
-=-=-=-=-=-=-=-=-=-=-=-
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^ permalink raw reply [flat|nested] 9+ messages in thread* Re: [edk2-devel] [PATCH] Use C99 flexible arrays
2023-08-23 21:41 ` Rebecca Cran
@ 2023-08-24 0:36 ` Pedro Falcato
2023-08-24 21:03 ` Rebecca Cran
2023-08-24 15:19 ` Oliver Smith-Denny
1 sibling, 1 reply; 9+ messages in thread
From: Pedro Falcato @ 2023-08-24 0:36 UTC (permalink / raw)
To: devel, rebecca; +Cc: afish, ehaouas, Yao, Jiewen
On Wed, Aug 23, 2023 at 10:41 PM Rebecca Cran <rebecca@bsdio.com> wrote:
>
> With Visual Studio 2019 adding C11 and C17 support as first-class
> features, I think we should be safe nowadays to rely on them. But we
> should check if older versions that we still support (VS 2015 etc.)
> support them too.
>
> https://devblogs.microsoft.com/cppblog/c11-and-c17-standard-support-arriving-in-msvc/
Don't we explicitly rely on C11 now? Due to your __function__ changes?
Anyway, I would recommend Elyes to break this change up into a patch
set with per-package patches. This way maintainers could easily review
and test the changes. The way it is right now isn't very reviewable
nor testable.
--
Pedro
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [edk2-devel] [PATCH] Use C99 flexible arrays
2023-08-24 0:36 ` Pedro Falcato
@ 2023-08-24 21:03 ` Rebecca Cran
0 siblings, 0 replies; 9+ messages in thread
From: Rebecca Cran @ 2023-08-24 21:03 UTC (permalink / raw)
To: Pedro Falcato, devel; +Cc: afish, ehaouas, Yao, Jiewen
I don't think I got around to explicitly requiring C11 with -std=c11,
but since we use _Static_assert on compilers that don't have MSC
Extensions or are C++ compilers we implicitly require it. It's possible
it's implemented via an extension though.
--
Rebecca Cran
On 8/23/23 18:36, Pedro Falcato wrote:
> On Wed, Aug 23, 2023 at 10:41 PM Rebecca Cran <rebecca@bsdio.com> wrote:
>> With Visual Studio 2019 adding C11 and C17 support as first-class
>> features, I think we should be safe nowadays to rely on them. But we
>> should check if older versions that we still support (VS 2015 etc.)
>> support them too.
>>
>> https://devblogs.microsoft.com/cppblog/c11-and-c17-standard-support-arriving-in-msvc/
> Don't we explicitly rely on C11 now? Due to your __function__ changes?
>
> Anyway, I would recommend Elyes to break this change up into a patch
> set with per-package patches. This way maintainers could easily review
> and test the changes. The way it is right now isn't very reviewable
> nor testable.
>
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^ permalink raw reply [flat|nested] 9+ messages in thread
* Re: [edk2-devel] [PATCH] Use C99 flexible arrays
2023-08-23 21:41 ` Rebecca Cran
2023-08-24 0:36 ` Pedro Falcato
@ 2023-08-24 15:19 ` Oliver Smith-Denny
2023-08-24 21:01 ` Rebecca Cran
1 sibling, 1 reply; 9+ messages in thread
From: Oliver Smith-Denny @ 2023-08-24 15:19 UTC (permalink / raw)
To: devel, rebecca, afish, ehaouas; +Cc: Yao, Jiewen
On 8/23/2023 2:41 PM, Rebecca Cran wrote:
> With Visual Studio 2019 adding C11 and C17 support as first-class
> features, I think we should be safe nowadays to rely on them. But we
> should check if older versions that we still support (VS 2015 etc.)
> support them too.
>
> https://devblogs.microsoft.com/cppblog/c11-and-c17-standard-support-arriving-in-msvc/
>
>
Perhaps this is a worthwhile time to drop VS 2015 and support VS 2022?
Oliver
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^ permalink raw reply [flat|nested] 9+ messages in thread
* [edk2-devel] [PATCH] Use C99 flexible arrays
@ 2023-08-20 11:07 Elyes Haouas
2023-08-21 14:32 ` Yao, Jiewen
0 siblings, 1 reply; 9+ messages in thread
From: Elyes Haouas @ 2023-08-20 11:07 UTC (permalink / raw)
To: devel; +Cc: Elyes Haouas
Use C99 flexible arrays instead of older style of one-element or
zero-length arrays.
It allows the compiler to generate errors when the flexible array does
not occur at the end in the structure.
Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
---
EmbeddedPkg/Include/fdt.h | 4 ++--
.../Library/FrameBufferBltLib/FrameBufferBltLib.c | 2 +-
MdePkg/Include/IndustryStandard/IpmiNetFnApp.h | 8 ++++----
MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h | 4 ++--
MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h | 6 +++---
MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h | 8 ++++----
MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h | 8 ++++----
MdePkg/Include/IndustryStandard/TcgStorageCore.h | 6 +++---
MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h | 2 +-
MdePkg/Include/Protocol/NvdimmLabel.h | 2 +-
UefiPayloadPkg/Include/Coreboot.h | 10 +++++-----
11 files changed, 30 insertions(+), 30 deletions(-)
diff --git a/EmbeddedPkg/Include/fdt.h b/EmbeddedPkg/Include/fdt.h
index 120dbc8bc6..f64695da5c 100644
--- a/EmbeddedPkg/Include/fdt.h
+++ b/EmbeddedPkg/Include/fdt.h
@@ -81,14 +81,14 @@ struct fdt_reserve_entry {
struct fdt_node_header {
fdt32_t tag;
- char name[0];
+ char name[];
};
struct fdt_property {
fdt32_t tag;
fdt32_t len;
fdt32_t nameoff;
- char data[0];
+ char data[];
};
#endif /* !__ASSEMBLY */
diff --git a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c b/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
index 432577bcfd..5fc5779e16 100644
--- a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
+++ b/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
@@ -24,7 +24,7 @@ struct FRAME_BUFFER_CONFIGURE {
EFI_PIXEL_BITMASK PixelMasks;
INT8 PixelShl[4]; // R-G-B-Rsvd
INT8 PixelShr[4]; // R-G-B-Rsvd
- UINT8 LineBuffer[0];
+ UINT8 LineBuffer[];
};
CONST EFI_PIXEL_BITMASK mRgbPixelMasks = {
diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
index b6bc91f46c..b5174a5042 100644
--- a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
+++ b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
@@ -433,7 +433,7 @@ typedef union {
typedef struct {
UINT8 CompletionCode;
IPMI_GET_MESSAGE_CHANNEL_NUMBER ChannelNumber;
- UINT8 MessageData[0];
+ UINT8 MessageData[];
} IPMI_GET_MESSAGE_RESPONSE;
//
@@ -457,12 +457,12 @@ typedef union {
typedef struct {
UINT8 CompletionCode;
IPMI_SEND_MESSAGE_CHANNEL_NUMBER ChannelNumber;
- UINT8 MessageData[0];
+ UINT8 MessageData[];
} IPMI_SEND_MESSAGE_REQUEST;
typedef struct {
UINT8 CompletionCode;
- UINT8 ResponseData[0];
+ UINT8 ResponseData[];
} IPMI_SEND_MESSAGE_RESPONSE;
//
@@ -906,7 +906,7 @@ typedef union {
typedef struct {
IPMI_SET_USER_PASSWORD_USER_ID UserId;
IPMI_SET_USER_PASSWORD_OPERATION Operation;
- UINT8 PasswordData[0]; // 16 or 20 bytes, depending on the 'PasswordSize' field
+ UINT8 PasswordData[]; // 16 or 20 bytes, depending on the 'PasswordSize' field
} IPMI_SET_USER_PASSWORD_REQUEST;
//
diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h b/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
index e3b8a62105..44024da69c 100644
--- a/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
+++ b/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
@@ -183,7 +183,7 @@ typedef union {
typedef struct {
IPMI_SET_BOOT_OPTIONS_PARAMETER_VALID ParameterValid;
- UINT8 ParameterData[0];
+ UINT8 ParameterData[];
} IPMI_SET_BOOT_OPTIONS_REQUEST;
typedef struct {
@@ -415,7 +415,7 @@ typedef struct {
UINT8 CompletionCode;
IPMI_GET_BOOT_OPTIONS_PARAMETER_VERSION ParameterVersion;
IPMI_GET_BOOT_OPTIONS_PARAMETER_VALID ParameterValid;
- UINT8 ParameterData[0];
+ UINT8 ParameterData[];
} IPMI_GET_BOOT_OPTIONS_RESPONSE;
//
diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h b/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
index 553a69a472..755bcb67e5 100644
--- a/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
+++ b/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
@@ -76,7 +76,7 @@ typedef struct {
typedef struct {
UINT8 CompletionCode;
UINT8 CountReturned;
- UINT8 Data[0];
+ UINT8 Data[];
} IPMI_READ_FRU_DATA_RESPONSE;
//
@@ -95,7 +95,7 @@ typedef struct {
typedef struct {
UINT8 DeviceId;
UINT16 InventoryOffset;
- UINT8 Data[0];
+ UINT8 Data[];
} IPMI_WRITE_FRU_DATA_REQUEST;
typedef struct {
@@ -594,7 +594,7 @@ typedef struct {
UINT16 RecordId;
UINT8 OffsetIntoRecord;
UINT8 InProgress;
- UINT8 RecordData[0];
+ UINT8 RecordData[];
} IPMI_PARTIAL_ADD_SEL_ENTRY_REQUEST;
typedef struct {
diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h b/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
index 2024c35f7f..273a162552 100644
--- a/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
+++ b/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
@@ -313,7 +313,7 @@ typedef union {
typedef struct {
IPMI_SET_LAN_CONFIG_CHANNEL_NUM ChannelNumber;
UINT8 ParameterSelector;
- UINT8 ParameterData[0];
+ UINT8 ParameterData[];
} IPMI_SET_LAN_CONFIGURATION_PARAMETERS_COMMAND_REQUEST;
//
@@ -343,7 +343,7 @@ typedef struct {
typedef struct {
UINT8 CompletionCode;
UINT8 ParameterRevision;
- UINT8 ParameterData[0];
+ UINT8 ParameterData[];
} IPMI_GET_LAN_CONFIGURATION_PARAMETERS_RESPONSE;
//
@@ -879,7 +879,7 @@ typedef union {
typedef struct {
IPMI_SET_SOL_CONFIG_PARAM_CHANNEL_NUM ChannelNumber;
UINT8 ParameterSelector;
- UINT8 ParameterData[0];
+ UINT8 ParameterData[];
} IPMI_SET_SOL_CONFIGURATION_PARAMETERS_REQUEST;
//
@@ -909,7 +909,7 @@ typedef struct {
typedef struct {
UINT8 CompletionCode;
UINT8 ParameterRevision;
- UINT8 ParameterData[0];
+ UINT8 ParameterData[];
} IPMI_GET_SOL_CONFIGURATION_PARAMETERS_RESPONSE;
#pragma pack()
diff --git a/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h b/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
index 9b7a5e838e..3e72812ea7 100644
--- a/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
+++ b/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
@@ -92,7 +92,7 @@ typedef struct {
typedef struct {
UINT32 NextDataTransferHandle;
UINT8 TransferFlag;
- UINT8 Table[0];
+ UINT8 Table[];
} PLDM_GET_SMBIOS_STRUCTURE_TABLE_RESPONSE;
typedef struct {
@@ -106,7 +106,7 @@ typedef struct {
typedef struct {
UINT32 DataTransferHandle;
UINT8 TransferFlag;
- UINT8 Table[0];
+ UINT8 Table[];
} PLDM_SET_SMBIOS_STRUCTURE_TABLE_REQUEST;
typedef struct {
@@ -143,7 +143,7 @@ typedef struct {
typedef struct {
UINT32 NextDataTransferHandle;
UINT8 TransferFlag;
- UINT8 Table[0];
+ UINT8 Table[];
} PLDM_GET_SMBIOS_STRUCTURE_BY_TYPE_RESPONSE;
typedef struct {
@@ -171,7 +171,7 @@ typedef struct {
typedef struct {
UINT32 NextDataTransferHandle;
UINT8 TransferFlag;
- UINT8 Table[0];
+ UINT8 Table[];
} PLDM_GET_SMBIOS_STRUCTURE_BY_HANDLE_RESPONSE;
typedef struct {
diff --git a/MdePkg/Include/IndustryStandard/TcgStorageCore.h b/MdePkg/Include/IndustryStandard/TcgStorageCore.h
index 1fae7b6e84..7502e3d46c 100644
--- a/MdePkg/Include/IndustryStandard/TcgStorageCore.h
+++ b/MdePkg/Include/IndustryStandard/TcgStorageCore.h
@@ -38,7 +38,7 @@ typedef struct {
UINT32 OutstandingDataBE;
UINT32 MinTransferBE;
UINT32 LengthBE;
- UINT8 Payload[0];
+ UINT8 Payload[];
} TCG_COM_PACKET;
typedef struct {
@@ -49,7 +49,7 @@ typedef struct {
UINT16 AckTypeBE;
UINT32 AcknowledgementBE;
UINT32 LengthBE;
- UINT8 Payload[0];
+ UINT8 Payload[];
} TCG_PACKET;
#define TCG_SUBPACKET_ALIGNMENT 4// 4-byte alignment per spec
@@ -58,7 +58,7 @@ typedef struct {
UINT8 ReservedBE[6];
UINT16 KindBE;
UINT32 LengthBE;
- UINT8 Payload[0];
+ UINT8 Payload[];
} TCG_SUB_PACKET;
#define SUBPACKET_KIND_DATA 0x0000
diff --git a/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h b/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
index 78acb4ddae..85d904ca9c 100644
--- a/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
+++ b/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
@@ -101,7 +101,7 @@ struct undiconfig_table {
struct {
VOID *NII_InterfacePointer; ///< Pointer to the NII interface structure.
VOID *DevicePathPointer; ///< Pointer to the device path for this NIC.
- } NII_entry[1];
+ } NII_entry[];
};
extern EFI_GUID gEfiNetworkInterfaceIdentifierProtocolGuid;
diff --git a/MdePkg/Include/Protocol/NvdimmLabel.h b/MdePkg/Include/Protocol/NvdimmLabel.h
index e46999a3ab..91a9b675f9 100644
--- a/MdePkg/Include/Protocol/NvdimmLabel.h
+++ b/MdePkg/Include/Protocol/NvdimmLabel.h
@@ -244,7 +244,7 @@ typedef struct {
///
/// Array size is 1 if EFI_NVDIMM_LABEL_FLAGS_LOCAL is set indicating a Local Namespaces.
///
- EFI_NVDIMM_LABEL_SET_COOKIE_MAP Mapping[0];
+ EFI_NVDIMM_LABEL_SET_COOKIE_MAP Mapping[];
} EFI_NVDIMM_LABEL_SET_COOKIE_INFO;
/**
diff --git a/UefiPayloadPkg/Include/Coreboot.h b/UefiPayloadPkg/Include/Coreboot.h
index 2d454f7c89..a53ede390c 100644
--- a/UefiPayloadPkg/Include/Coreboot.h
+++ b/UefiPayloadPkg/Include/Coreboot.h
@@ -59,7 +59,7 @@ struct cbmem_root {
UINT32 num_entries;
UINT32 locked;
UINT32 size;
- struct cbmem_entry entries[0];
+ struct cbmem_entry entries[];
};
struct imd_entry {
@@ -75,7 +75,7 @@ struct imd_root {
UINT32 flags;
UINT32 entry_align;
UINT32 max_offset;
- struct imd_entry entries[0];
+ struct imd_entry entries[];
};
struct cbuint64 {
@@ -119,7 +119,7 @@ struct cb_memory_range {
struct cb_memory {
UINT32 tag;
UINT32 size;
- struct cb_memory_range map[0];
+ struct cb_memory_range map[];
};
#define CB_TAG_MAINBOARD 0x0003
@@ -129,7 +129,7 @@ struct cb_mainboard {
UINT32 size;
UINT8 vendor_idx;
UINT8 part_number_idx;
- UINT8 strings[0];
+ UINT8 strings[];
};
#define CB_TAG_VERSION 0x0004
@@ -146,7 +146,7 @@ struct cb_mainboard {
struct cb_string {
UINT32 tag;
UINT32 size;
- UINT8 string[0];
+ UINT8 string[];
};
#define CB_TAG_SERIAL 0x000f
--
2.40.1
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^ permalink raw reply related [flat|nested] 9+ messages in thread* Re: [edk2-devel] [PATCH] Use C99 flexible arrays
2023-08-20 11:07 Elyes Haouas
@ 2023-08-21 14:32 ` Yao, Jiewen
0 siblings, 0 replies; 9+ messages in thread
From: Yao, Jiewen @ 2023-08-21 14:32 UTC (permalink / raw)
To: devel@edk2.groups.io, ehaouas@noos.fr; +Cc: Yao, Jiewen
Hi
This fix breaks the compatibility.
Have you tested all features that depends on this data structure?
Thank you
Yao, Jiewen
> -----Original Message-----
> From: devel@edk2.groups.io <devel@edk2.groups.io> On Behalf Of Elyes Haouas
> Sent: Sunday, August 20, 2023 8:07 PM
> To: devel@edk2.groups.io
> Cc: Elyes Haouas <ehaouas@noos.fr>
> Subject: [edk2-devel] [PATCH] Use C99 flexible arrays
>
> Use C99 flexible arrays instead of older style of one-element or
> zero-length arrays.
> It allows the compiler to generate errors when the flexible array does
> not occur at the end in the structure.
>
> Signed-off-by: Elyes Haouas <ehaouas@noos.fr>
> ---
> EmbeddedPkg/Include/fdt.h | 4 ++--
> .../Library/FrameBufferBltLib/FrameBufferBltLib.c | 2 +-
> MdePkg/Include/IndustryStandard/IpmiNetFnApp.h | 8 ++++----
> MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h | 4 ++--
> MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h | 6 +++---
> MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h | 8 ++++----
> MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h | 8 ++++----
> MdePkg/Include/IndustryStandard/TcgStorageCore.h | 6 +++---
> MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h | 2 +-
> MdePkg/Include/Protocol/NvdimmLabel.h | 2 +-
> UefiPayloadPkg/Include/Coreboot.h | 10 +++++-----
> 11 files changed, 30 insertions(+), 30 deletions(-)
>
> diff --git a/EmbeddedPkg/Include/fdt.h b/EmbeddedPkg/Include/fdt.h
> index 120dbc8bc6..f64695da5c 100644
> --- a/EmbeddedPkg/Include/fdt.h
> +++ b/EmbeddedPkg/Include/fdt.h
> @@ -81,14 +81,14 @@ struct fdt_reserve_entry {
>
>
> struct fdt_node_header {
>
> fdt32_t tag;
>
> - char name[0];
>
> + char name[];
>
> };
>
>
>
> struct fdt_property {
>
> fdt32_t tag;
>
> fdt32_t len;
>
> fdt32_t nameoff;
>
> - char data[0];
>
> + char data[];
>
> };
>
>
>
> #endif /* !__ASSEMBLY */
>
> diff --git a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> b/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> index 432577bcfd..5fc5779e16 100644
> --- a/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> +++ b/MdeModulePkg/Library/FrameBufferBltLib/FrameBufferBltLib.c
> @@ -24,7 +24,7 @@ struct FRAME_BUFFER_CONFIGURE {
> EFI_PIXEL_BITMASK PixelMasks;
>
> INT8 PixelShl[4]; // R-G-B-Rsvd
>
> INT8 PixelShr[4]; // R-G-B-Rsvd
>
> - UINT8 LineBuffer[0];
>
> + UINT8 LineBuffer[];
>
> };
>
>
>
> CONST EFI_PIXEL_BITMASK mRgbPixelMasks = {
>
> diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> index b6bc91f46c..b5174a5042 100644
> --- a/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnApp.h
> @@ -433,7 +433,7 @@ typedef union {
> typedef struct {
>
> UINT8 CompletionCode;
>
> IPMI_GET_MESSAGE_CHANNEL_NUMBER ChannelNumber;
>
> - UINT8 MessageData[0];
>
> + UINT8 MessageData[];
>
> } IPMI_GET_MESSAGE_RESPONSE;
>
>
>
> //
>
> @@ -457,12 +457,12 @@ typedef union {
> typedef struct {
>
> UINT8 CompletionCode;
>
> IPMI_SEND_MESSAGE_CHANNEL_NUMBER ChannelNumber;
>
> - UINT8 MessageData[0];
>
> + UINT8 MessageData[];
>
> } IPMI_SEND_MESSAGE_REQUEST;
>
>
>
> typedef struct {
>
> UINT8 CompletionCode;
>
> - UINT8 ResponseData[0];
>
> + UINT8 ResponseData[];
>
> } IPMI_SEND_MESSAGE_RESPONSE;
>
>
>
> //
>
> @@ -906,7 +906,7 @@ typedef union {
> typedef struct {
>
> IPMI_SET_USER_PASSWORD_USER_ID UserId;
>
> IPMI_SET_USER_PASSWORD_OPERATION Operation;
>
> - UINT8 PasswordData[0]; // 16 or 20 bytes, depending on the
> 'PasswordSize' field
>
> + UINT8 PasswordData[]; // 16 or 20 bytes, depending on the
> 'PasswordSize' field
>
> } IPMI_SET_USER_PASSWORD_REQUEST;
>
>
>
> //
>
> diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> b/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> index e3b8a62105..44024da69c 100644
> --- a/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnChassis.h
> @@ -183,7 +183,7 @@ typedef union {
>
>
> typedef struct {
>
> IPMI_SET_BOOT_OPTIONS_PARAMETER_VALID ParameterValid;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_SET_BOOT_OPTIONS_REQUEST;
>
>
>
> typedef struct {
>
> @@ -415,7 +415,7 @@ typedef struct {
> UINT8 CompletionCode;
>
> IPMI_GET_BOOT_OPTIONS_PARAMETER_VERSION ParameterVersion;
>
> IPMI_GET_BOOT_OPTIONS_PARAMETER_VALID ParameterValid;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_GET_BOOT_OPTIONS_RESPONSE;
>
>
>
> //
>
> diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> b/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> index 553a69a472..755bcb67e5 100644
> --- a/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnStorage.h
> @@ -76,7 +76,7 @@ typedef struct {
> typedef struct {
>
> UINT8 CompletionCode;
>
> UINT8 CountReturned;
>
> - UINT8 Data[0];
>
> + UINT8 Data[];
>
> } IPMI_READ_FRU_DATA_RESPONSE;
>
>
>
> //
>
> @@ -95,7 +95,7 @@ typedef struct {
> typedef struct {
>
> UINT8 DeviceId;
>
> UINT16 InventoryOffset;
>
> - UINT8 Data[0];
>
> + UINT8 Data[];
>
> } IPMI_WRITE_FRU_DATA_REQUEST;
>
>
>
> typedef struct {
>
> @@ -594,7 +594,7 @@ typedef struct {
> UINT16 RecordId;
>
> UINT8 OffsetIntoRecord;
>
> UINT8 InProgress;
>
> - UINT8 RecordData[0];
>
> + UINT8 RecordData[];
>
> } IPMI_PARTIAL_ADD_SEL_ENTRY_REQUEST;
>
>
>
> typedef struct {
>
> diff --git a/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> b/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> index 2024c35f7f..273a162552 100644
> --- a/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> +++ b/MdePkg/Include/IndustryStandard/IpmiNetFnTransport.h
> @@ -313,7 +313,7 @@ typedef union {
> typedef struct {
>
> IPMI_SET_LAN_CONFIG_CHANNEL_NUM ChannelNumber;
>
> UINT8 ParameterSelector;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_SET_LAN_CONFIGURATION_PARAMETERS_COMMAND_REQUEST;
>
>
>
> //
>
> @@ -343,7 +343,7 @@ typedef struct {
> typedef struct {
>
> UINT8 CompletionCode;
>
> UINT8 ParameterRevision;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_GET_LAN_CONFIGURATION_PARAMETERS_RESPONSE;
>
>
>
> //
>
> @@ -879,7 +879,7 @@ typedef union {
> typedef struct {
>
> IPMI_SET_SOL_CONFIG_PARAM_CHANNEL_NUM ChannelNumber;
>
> UINT8 ParameterSelector;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_SET_SOL_CONFIGURATION_PARAMETERS_REQUEST;
>
>
>
> //
>
> @@ -909,7 +909,7 @@ typedef struct {
> typedef struct {
>
> UINT8 CompletionCode;
>
> UINT8 ParameterRevision;
>
> - UINT8 ParameterData[0];
>
> + UINT8 ParameterData[];
>
> } IPMI_GET_SOL_CONFIGURATION_PARAMETERS_RESPONSE;
>
>
>
> #pragma pack()
>
> diff --git a/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> b/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> index 9b7a5e838e..3e72812ea7 100644
> --- a/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> +++ b/MdePkg/Include/IndustryStandard/PldmSmbiosTransfer.h
> @@ -92,7 +92,7 @@ typedef struct {
> typedef struct {
>
> UINT32 NextDataTransferHandle;
>
> UINT8 TransferFlag;
>
> - UINT8 Table[0];
>
> + UINT8 Table[];
>
> } PLDM_GET_SMBIOS_STRUCTURE_TABLE_RESPONSE;
>
>
>
> typedef struct {
>
> @@ -106,7 +106,7 @@ typedef struct {
> typedef struct {
>
> UINT32 DataTransferHandle;
>
> UINT8 TransferFlag;
>
> - UINT8 Table[0];
>
> + UINT8 Table[];
>
> } PLDM_SET_SMBIOS_STRUCTURE_TABLE_REQUEST;
>
>
>
> typedef struct {
>
> @@ -143,7 +143,7 @@ typedef struct {
> typedef struct {
>
> UINT32 NextDataTransferHandle;
>
> UINT8 TransferFlag;
>
> - UINT8 Table[0];
>
> + UINT8 Table[];
>
> } PLDM_GET_SMBIOS_STRUCTURE_BY_TYPE_RESPONSE;
>
>
>
> typedef struct {
>
> @@ -171,7 +171,7 @@ typedef struct {
> typedef struct {
>
> UINT32 NextDataTransferHandle;
>
> UINT8 TransferFlag;
>
> - UINT8 Table[0];
>
> + UINT8 Table[];
>
> } PLDM_GET_SMBIOS_STRUCTURE_BY_HANDLE_RESPONSE;
>
>
>
> typedef struct {
>
> diff --git a/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> b/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> index 1fae7b6e84..7502e3d46c 100644
> --- a/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> +++ b/MdePkg/Include/IndustryStandard/TcgStorageCore.h
> @@ -38,7 +38,7 @@ typedef struct {
> UINT32 OutstandingDataBE;
>
> UINT32 MinTransferBE;
>
> UINT32 LengthBE;
>
> - UINT8 Payload[0];
>
> + UINT8 Payload[];
>
> } TCG_COM_PACKET;
>
>
>
> typedef struct {
>
> @@ -49,7 +49,7 @@ typedef struct {
> UINT16 AckTypeBE;
>
> UINT32 AcknowledgementBE;
>
> UINT32 LengthBE;
>
> - UINT8 Payload[0];
>
> + UINT8 Payload[];
>
> } TCG_PACKET;
>
>
>
> #define TCG_SUBPACKET_ALIGNMENT 4// 4-byte alignment per spec
>
> @@ -58,7 +58,7 @@ typedef struct {
> UINT8 ReservedBE[6];
>
> UINT16 KindBE;
>
> UINT32 LengthBE;
>
> - UINT8 Payload[0];
>
> + UINT8 Payload[];
>
> } TCG_SUB_PACKET;
>
>
>
> #define SUBPACKET_KIND_DATA 0x0000
>
> diff --git a/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> b/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> index 78acb4ddae..85d904ca9c 100644
> --- a/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> +++ b/MdePkg/Include/Protocol/NetworkInterfaceIdentifier.h
> @@ -101,7 +101,7 @@ struct undiconfig_table {
> struct {
>
> VOID *NII_InterfacePointer; ///< Pointer to the NII interface structure.
>
> VOID *DevicePathPointer; ///< Pointer to the device path for this NIC.
>
> - } NII_entry[1];
>
> + } NII_entry[];
>
> };
>
>
>
> extern EFI_GUID gEfiNetworkInterfaceIdentifierProtocolGuid;
>
> diff --git a/MdePkg/Include/Protocol/NvdimmLabel.h
> b/MdePkg/Include/Protocol/NvdimmLabel.h
> index e46999a3ab..91a9b675f9 100644
> --- a/MdePkg/Include/Protocol/NvdimmLabel.h
> +++ b/MdePkg/Include/Protocol/NvdimmLabel.h
> @@ -244,7 +244,7 @@ typedef struct {
> ///
>
> /// Array size is 1 if EFI_NVDIMM_LABEL_FLAGS_LOCAL is set indicating a Local
> Namespaces.
>
> ///
>
> - EFI_NVDIMM_LABEL_SET_COOKIE_MAP Mapping[0];
>
> + EFI_NVDIMM_LABEL_SET_COOKIE_MAP Mapping[];
>
> } EFI_NVDIMM_LABEL_SET_COOKIE_INFO;
>
>
>
> /**
>
> diff --git a/UefiPayloadPkg/Include/Coreboot.h
> b/UefiPayloadPkg/Include/Coreboot.h
> index 2d454f7c89..a53ede390c 100644
> --- a/UefiPayloadPkg/Include/Coreboot.h
> +++ b/UefiPayloadPkg/Include/Coreboot.h
> @@ -59,7 +59,7 @@ struct cbmem_root {
> UINT32 num_entries;
>
> UINT32 locked;
>
> UINT32 size;
>
> - struct cbmem_entry entries[0];
>
> + struct cbmem_entry entries[];
>
> };
>
>
>
> struct imd_entry {
>
> @@ -75,7 +75,7 @@ struct imd_root {
> UINT32 flags;
>
> UINT32 entry_align;
>
> UINT32 max_offset;
>
> - struct imd_entry entries[0];
>
> + struct imd_entry entries[];
>
> };
>
>
>
> struct cbuint64 {
>
> @@ -119,7 +119,7 @@ struct cb_memory_range {
> struct cb_memory {
>
> UINT32 tag;
>
> UINT32 size;
>
> - struct cb_memory_range map[0];
>
> + struct cb_memory_range map[];
>
> };
>
>
>
> #define CB_TAG_MAINBOARD 0x0003
>
> @@ -129,7 +129,7 @@ struct cb_mainboard {
> UINT32 size;
>
> UINT8 vendor_idx;
>
> UINT8 part_number_idx;
>
> - UINT8 strings[0];
>
> + UINT8 strings[];
>
> };
>
>
>
> #define CB_TAG_VERSION 0x0004
>
> @@ -146,7 +146,7 @@ struct cb_mainboard {
> struct cb_string {
>
> UINT32 tag;
>
> UINT32 size;
>
> - UINT8 string[0];
>
> + UINT8 string[];
>
> };
>
>
>
> #define CB_TAG_SERIAL 0x000f
>
> --
> 2.40.1
>
>
>
> -=-=-=-=-=-=
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^ permalink raw reply [flat|nested] 9+ messages in thread
end of thread, other threads:[~2023-08-24 21:03 UTC | newest]
Thread overview: 9+ messages (download: mbox.gz follow: Atom feed
-- links below jump to the message on this page --
2023-08-21 16:56 [edk2-devel] [PATCH] Use C99 flexible arrays ehaouas
2023-08-22 15:28 ` Andrew Fish via groups.io
2023-08-23 21:41 ` Rebecca Cran
2023-08-24 0:36 ` Pedro Falcato
2023-08-24 21:03 ` Rebecca Cran
2023-08-24 15:19 ` Oliver Smith-Denny
2023-08-24 21:01 ` Rebecca Cran
-- strict thread matches above, loose matches on Subject: below --
2023-08-20 11:07 Elyes Haouas
2023-08-21 14:32 ` Yao, Jiewen
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