From 6cd962292d9eb3b3e7189fde532f7e49f395cccb Mon Sep 17 00:00:00 2001 From: Paul Burton Date: Thu, 11 Sep 2014 08:30:21 +0100 Subject: MIPS: ELF: Add definition for the .MIPS.abiflags section New toolchains will generate a .MIPS.abiflags section, referenced by a new PT_MIPS_ABIFLAGS program header. This section will provide information about the requirements of the ELF, including the ISA level the code is built for, the ASEs it requires, the size of various registers and its expectations of the floating point mode. This patch introduces a definition of the structure of this section and the program header, for use in a subsequent patch. Signed-off-by: Paul Burton Cc: linux-mips@linux-mips.org Cc: Alexander Viro Cc: linux-fsdevel@vger.kernel.org Cc: linux-kernel@vger.kernel.org Patchwork: https://patchwork.linux-mips.org/patch/7682/ Signed-off-by: Ralf Baechle --- arch/mips/include/asm/elf.h | 25 +++++++++++++++++++++++++ 1 file changed, 25 insertions(+) (limited to 'arch/mips/include/asm') diff --git a/arch/mips/include/asm/elf.h b/arch/mips/include/asm/elf.h index 9343529db7b..bfa4bbd42c6 100644 --- a/arch/mips/include/asm/elf.h +++ b/arch/mips/include/asm/elf.h @@ -28,6 +28,7 @@ #define PT_MIPS_REGINFO 0x70000000 #define PT_MIPS_RTPROC 0x70000001 #define PT_MIPS_OPTIONS 0x70000002 +#define PT_MIPS_ABIFLAGS 0x70000003 /* Flags in the e_flags field of the header */ #define EF_MIPS_NOREORDER 0x00000001 @@ -174,6 +175,30 @@ typedef elf_greg_t elf_gregset_t[ELF_NGREG]; typedef double elf_fpreg_t; typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; +struct mips_elf_abiflags_v0 { + uint16_t version; /* Version of flags structure */ + uint8_t isa_level; /* The level of the ISA: 1-5, 32, 64 */ + uint8_t isa_rev; /* The revision of ISA: 0 for MIPS V and below, + 1-n otherwise */ + uint8_t gpr_size; /* The size of general purpose registers */ + uint8_t cpr1_size; /* The size of co-processor 1 registers */ + uint8_t cpr2_size; /* The size of co-processor 2 registers */ + uint8_t fp_abi; /* The floating-point ABI */ + uint32_t isa_ext; /* Mask of processor-specific extensions */ + uint32_t ases; /* Mask of ASEs used */ + uint32_t flags1; /* Mask of general flags */ + uint32_t flags2; +}; + +#define MIPS_ABI_FP_ANY 0 /* FP ABI doesn't matter */ +#define MIPS_ABI_FP_DOUBLE 1 /* -mdouble-float */ +#define MIPS_ABI_FP_SINGLE 2 /* -msingle-float */ +#define MIPS_ABI_FP_SOFT 3 /* -msoft-float */ +#define MIPS_ABI_FP_OLD_64 4 /* -mips32r2 -mfp64 */ +#define MIPS_ABI_FP_XX 5 /* -mfpxx */ +#define MIPS_ABI_FP_64 6 /* -mips32r2 -mfp64 */ +#define MIPS_ABI_FP_64A 7 /* -mips32r2 -mfp64 -mno-odd-spreg */ + #ifdef CONFIG_32BIT /* -- cgit v1.2.3-70-g09d2