[PATCH v7 1/6] elf: Define DT_RELR related macros and types

[Fangrui Song]

On 2022-04-04, Adhemerval Zanella wrote:
>LGTM, thanks.
>
>Reviewed-by: Adhemerval Zanella  <adhemerval.zanella@linaro.org>
>
>On 31/03/2022 13:38, H.J. Lu wrote:
>> ---
>>  elf/elf.h | 13 +++++++++++--
>>  1 file changed, 11 insertions(+), 2 deletions(-)
>>
>> diff --git a/elf/elf.h b/elf/elf.h
>> index 0735f6b579..0195029188 100644
>> --- a/elf/elf.h
>> +++ b/elf/elf.h
>> @@ -443,7 +443,8 @@ typedef struct
>>  #define SHT_PREINIT_ARRAY 16		/* Array of pre-constructors */
>>  #define SHT_GROUP	  17		/* Section group */
>>  #define SHT_SYMTAB_SHNDX  18		/* Extended section indices */
>> -#define	SHT_NUM		  19		/* Number of defined types.  */
>> +#define SHT_RELR	  19            /* RELR relative relocations */
>> +#define	SHT_NUM		  20		/* Number of defined types.  */
>>  #define SHT_LOOS	  0x60000000	/* Start OS-specific.  */
>>  #define SHT_GNU_ATTRIBUTES 0x6ffffff5	/* Object attributes.  */
>>  #define SHT_GNU_HASH	  0x6ffffff6	/* GNU-style hash table.  */
>> @@ -662,6 +663,11 @@ typedef struct
>>    Elf64_Sxword	r_addend;		/* Addend */
>>  } Elf64_Rela;
>>
>> +/* RELR relocation table entry */
>> +
>> +typedef Elf32_Word	Elf32_Relr;
>> +typedef Elf64_Xword	Elf64_Relr;
>> +
>>  /* How to extract and insert information held in the r_info field.  */
>>
>>  #define ELF32_R_SYM(val)		((val) >> 8)
>> @@ -887,7 +893,10 @@ typedef struct
>>  #define DT_PREINIT_ARRAY 32		/* Array with addresses of preinit fct*/
>>  #define DT_PREINIT_ARRAYSZ 33		/* size in bytes of DT_PREINIT_ARRAY */
>>  #define DT_SYMTAB_SHNDX	34		/* Address of SYMTAB_SHNDX section */
>> -#define	DT_NUM		35		/* Number used */
>> +#define DT_RELRSZ	35		/* Total size of RELR relative relocations */
>> +#define DT_RELR		36		/* Address of RELR relative relocations */
>> +#define DT_RELRENT	37		/* Size of one RELR relative relocaction */
>> +#define	DT_NUM		38		/* Number used */
>>  #define DT_LOOS		0x6000000d	/* Start of OS-specific */
>>  #define DT_HIOS		0x6ffff000	/* End of OS-specific */
>>  #define DT_LOPROC	0x70000000	/* Start of processor-specific */

Obviously LGTM to me as well since I suggested the comments.


Reviewed-by: Fangrui Song <maskray@google.com>