Add sframe header so that we know how to access the sframe section generated by compilers.
This is the sframe header file borrowed from the patchset [1] Josh Poimboeuf according to sframe v2 spec [2]. [1]: https://lore.kernel.org/all/f27e8463783febfa0dabb0432a3dd6be8ad98412.1737511963.git.jpoim...@kernel.org/ [2]: https://sourceware.org/binutils/docs/sframe-spec.html Signed-off-by: Weinan Liu <[email protected]> Signed-off-by: Dylan Hatch <[email protected]> Reviewed-by: Prasanna Kumar T S M <[email protected]> --- kernel/sframe.h | 75 +++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 75 insertions(+) create mode 100644 kernel/sframe.h diff --git a/kernel/sframe.h b/kernel/sframe.h new file mode 100644 index 000000000000..e9045f980fee --- /dev/null +++ b/kernel/sframe.h @@ -0,0 +1,75 @@ +/* SPDX-License-Identifier: GPL-2.0-or-later */ +/* + * From https://www.sourceware.org/binutils/docs/sframe-spec.html + */ +#ifndef _SFRAME_H +#define _SFRAME_H + +#include <linux/types.h> + +#define SFRAME_VERSION_1 1 +#define SFRAME_VERSION_2 2 +#define SFRAME_MAGIC 0xdee2 + +#define SFRAME_F_FDE_SORTED 0x1 +#define SFRAME_F_FRAME_POINTER 0x2 + +#define SFRAME_ABI_AARCH64_ENDIAN_BIG 1 +#define SFRAME_ABI_AARCH64_ENDIAN_LITTLE 2 +#define SFRAME_ABI_AMD64_ENDIAN_LITTLE 3 + +#define SFRAME_FRE_TYPE_ADDR1 0 +#define SFRAME_FRE_TYPE_ADDR2 1 +#define SFRAME_FRE_TYPE_ADDR4 2 + +#define SFRAME_FDE_TYPE_PCINC 0 +#define SFRAME_FDE_TYPE_PCMASK 1 + +struct sframe_preamble { + u16 magic; + u8 version; + u8 flags; +} __packed; + +struct sframe_header { + struct sframe_preamble preamble; + u8 abi_arch; + s8 cfa_fixed_fp_offset; + s8 cfa_fixed_ra_offset; + u8 auxhdr_len; + u32 num_fdes; + u32 num_fres; + u32 fre_len; + u32 fdes_off; + u32 fres_off; +} __packed; + +#define SFRAME_HEADER_SIZE(header) \ + ((sizeof(struct sframe_header) + (header).auxhdr_len)) + +#define SFRAME_AARCH64_PAUTH_KEY_A 0 +#define SFRAME_AARCH64_PAUTH_KEY_B 1 + +struct sframe_fde { + s32 start_addr; + u32 func_size; + u32 fres_off; + u32 fres_num; + u8 info; + u8 rep_size; + u16 padding; +} __packed; + +#define SFRAME_FUNC_FRE_TYPE(data) (data & 0xf) +#define SFRAME_FUNC_FDE_TYPE(data) ((data >> 4) & 0x1) +#define SFRAME_FUNC_PAUTH_KEY(data) ((data >> 5) & 0x1) + +#define SFRAME_BASE_REG_FP 0 +#define SFRAME_BASE_REG_SP 1 + +#define SFRAME_FRE_CFA_BASE_REG_ID(data) (data & 0x1) +#define SFRAME_FRE_OFFSET_COUNT(data) ((data >> 1) & 0xf) +#define SFRAME_FRE_OFFSET_SIZE(data) ((data >> 5) & 0x3) +#define SFRAME_FRE_MANGLED_RA_P(data) ((data >> 7) & 0x1) + +#endif /* _SFRAME_H */ -- 2.51.0.355.g5224444f11-goog
