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| author | Martin Schwidefsky <schwidefsky@de.ibm.com> | 2020-11-13 02:03:23 +0300 |
|---|---|---|
| committer | Josh Poimboeuf <jpoimboe@redhat.com> | 2021-01-14 03:13:11 +0300 |
| commit | 1d509f2a6ebca1aea3089c769f6375f01a832e9b (patch) | |
| tree | 35d674a10d5c2e0e5f0f56cb3520bd14958f5183 /arch/x86/include/asm/insn.h | |
| parent | c8d7b7e592f471ec1da39d872dc6bbf767a812e7 (diff) | |
| download | linux-1d509f2a6ebca1aea3089c769f6375f01a832e9b.tar.xz | |
x86/insn: Support big endian cross-compiles
The x86 instruction decoder code is shared across the kernel source and
the tools. Currently objtool seems to be the only tool from build tools
needed which breaks x86 cross-compilation on big endian systems. Make
the x86 instruction decoder build host endianness agnostic to support
x86 cross-compilation and enable objtool to implement endianness
awareness for big endian architectures support.
Signed-off-by: Martin Schwidefsky <schwidefsky@de.ibm.com>
Co-developed-by: Vasily Gorbik <gor@linux.ibm.com>
Signed-off-by: Vasily Gorbik <gor@linux.ibm.com>
Acked-by: Peter Zijlstra (Intel) <peterz@infradead.org>
Acked-by: Masami Hiramatsu <mhiramat@kernel.org>
Signed-off-by: Josh Poimboeuf <jpoimboe@redhat.com>
Diffstat (limited to 'arch/x86/include/asm/insn.h')
| -rw-r--r-- | arch/x86/include/asm/insn.h | 33 |
1 files changed, 33 insertions, 0 deletions
diff --git a/arch/x86/include/asm/insn.h b/arch/x86/include/asm/insn.h index a8c3d284fa46..090863cfb7f3 100644 --- a/arch/x86/include/asm/insn.h +++ b/arch/x86/include/asm/insn.h @@ -7,9 +7,12 @@ * Copyright (C) IBM Corporation, 2009 */ +#include <asm/byteorder.h> /* insn_attr_t is defined in inat.h */ #include <asm/inat.h> +#if defined(__BYTE_ORDER) ? __BYTE_ORDER == __LITTLE_ENDIAN : defined(__LITTLE_ENDIAN) + struct insn_field { union { insn_value_t value; @@ -20,6 +23,36 @@ struct insn_field { unsigned char nbytes; }; +static inline void insn_field_set(struct insn_field *p, insn_value_t v, + unsigned char n) +{ + p->value = v; + p->nbytes = n; +} + +#else + +struct insn_field { + insn_value_t value; + union { + insn_value_t little; + insn_byte_t bytes[4]; + }; + /* !0 if we've run insn_get_xxx() for this field */ + unsigned char got; + unsigned char nbytes; +}; + +static inline void insn_field_set(struct insn_field *p, insn_value_t v, + unsigned char n) +{ + p->value = v; + p->little = __cpu_to_le32(v); + p->nbytes = n; +} + +#endif + struct insn { struct insn_field prefixes; /* * Prefixes |