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Arnd BergmannandWill Deacon
998d4d789d
I came a cross a missing declaration in a randconfig build:
arch/arm64/kernel/static_call.c:16:5: error: call to undeclared function 'aarch64_insn_adrp_get_offset'; ISO C99 and later do not support implicit function declarations [-Wimplicit-function-declaration]
16 | aarch64_insn_adrp_get_offset(le32_to_cpup(tramp + 4)) +
| ^
Include the header that contains this definition explicitly,
rather than relying on it to come indirectly through another
header.
Fixes: 54ac9ff8f1 ("arm64: Use static call trampolines when kCFI is enabled")
Signed-off-by: Arnd Bergmann <arnd@arndb.de>
Signed-off-by: Will Deacon <will@kernel.org>
25 lines
701 B
C
25 lines
701 B
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/static_call.h>
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#include <linux/memory.h>
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#include <asm/text-patching.h>
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#include <asm/insn.h>
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void arch_static_call_transform(void *site, void *tramp, void *func, bool tail)
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{
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u64 literal;
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int ret;
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if (!func)
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func = __static_call_return0;
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/* decode the instructions to discover the literal address */
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literal = ALIGN_DOWN((u64)tramp + 4, SZ_4K) +
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aarch64_insn_adrp_get_offset(le32_to_cpup(tramp + 4)) +
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8 * aarch64_insn_decode_immediate(AARCH64_INSN_IMM_12,
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le32_to_cpup(tramp + 8));
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ret = aarch64_insn_write_literal_u64((void *)literal, (u64)func);
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WARN_ON_ONCE(ret);
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}
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EXPORT_SYMBOL_GPL(arch_static_call_transform);
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