diff options
| author | David Faust <david.faust@oracle.com> | 2021-06-01 09:22:59 -0700 |
|---|---|---|
| committer | David Faust <david.faust@oracle.com> | 2021-07-02 08:32:44 -0700 |
| commit | 18d0fad77b580d1ac64ed04d94fd3c9795687b91 (patch) | |
| tree | 1dcda79f66eae9a3de3ddc5028ec73c71db26cd5 /include/btf.h | |
| parent | b60761baa6fd6acf3200e732283d133f4ce0f0e9 (diff) | |
BTF: Support for BTF_KIND_FLOAT
Add BTF_KIND_FLOAT, a new BTF type kind which has recently stabilized in
the linux kernel [1]. This kind is used for encoding floating point
types, and is of particular use when generating BTF for some s390
arch-specific kernel headers.
Also update some BTF tests which previously used floating point types to
check correct behavior for types with no BTF representation.
[1]: https://github.com/torvalds/linux/commit/b1828f0b04828aa8cccadf00a702f459caefeed9
include/ChangeLog:
* btf.h (struct btf_type): Update bit usage comment.
(BTF_INFO_KIND): Update bit mask.
(BTF_KIND_FLOAT): New define.
(BTF_KIND_MAX): Update.
gcc/ChangeLog:
* btfout.c (get_btf_kind): Support BTF_KIND_FLOAT.
(btf_asm_type): Likewise.
gcc/testsuite/ChangeLog:
* gcc.dg/debug/btf/btf-float-1.c: New test.
* gcc.dg/debug/btf/btf-function-3.c: Use different unrepresentable type.
* gcc.dg/debug/btf/btf-struct-2.c: Likewise.
* gcc.dg/debug/btf/btf-variables-2.c: Likewise.
Diffstat (limited to 'include/btf.h')
| -rw-r--r-- | include/btf.h | 9 |
1 files changed, 5 insertions, 4 deletions
diff --git a/include/btf.h b/include/btf.h index 3b1a4c3093f..bf720ee49b4 100644 --- a/include/btf.h +++ b/include/btf.h @@ -62,8 +62,8 @@ struct btf_type uint32_t info; /* Encoded kind, variant length, kind flag: - bits 0-15: vlen - bits 16-23: unused - - bits 24-27: kind - - bits 28-30: unused + - bits 24-28: kind + - bits 29-30: unused - bit 31: kind_flag See accessor macros below. */ @@ -79,7 +79,7 @@ struct btf_type /* The folloing macros access the information encoded in btf_type.info. */ /* Type kind. See below. */ -#define BTF_INFO_KIND(info) (((info) >> 24) & 0x0f) +#define BTF_INFO_KIND(info) (((info) >> 24) & 0x1f) /* Number of entries of variable length data following certain type kinds. For example, number of structure members, number of function parameters. */ #define BTF_INFO_VLEN(info) ((info) & 0xffff) @@ -108,7 +108,8 @@ struct btf_type #define BTF_KIND_FUNC_PROTO 13 /* Function Prototype. */ #define BTF_KIND_VAR 14 /* Variable. */ #define BTF_KIND_DATASEC 15 /* Section such as .bss or .data. */ -#define BTF_KIND_MAX BTF_KIND_DATASEC +#define BTF_KIND_FLOAT 16 /* Floating point. */ +#define BTF_KIND_MAX BTF_KIND_FLOAT #define NR_BTF_KINDS (BTF_KIND_MAX + 1) /* For some BTF_KINDs, struct btf_type is immediately followed by |