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Fix complex atomic instructions handling (#2584)

This commit is contained in:
Roee Toledano 2024-12-26 13:58:14 +02:00 committed by GitHub
parent 9907b22d33
commit e160cbc59e
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1 changed files with 4 additions and 2 deletions
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6
arch/BPF/BPFDisassembler.c
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@ -495,7 +495,9 @@ static bpf_insn op2insn_ld_ebpf(unsigned opcode)
#define COMPLEX_CASE(c) \ #define COMPLEX_CASE(c) \
case BPF_ATOMIC_##c | BPF_MODE_FETCH: \ case BPF_ATOMIC_##c | BPF_MODE_FETCH: \
if (BPF_SIZE(opcode) == BPF_SIZE_DW) \ if (BPF_SIZE(opcode) == BPF_SIZE_DW) \
return BPF_INS_A##c##64; return BPF_INS_A##c##64; \
else \
return BPF_INS_INVALID;
#define CASE(c) \ #define CASE(c) \
case BPF_SIZE_##c: \ case BPF_SIZE_##c: \
@ -524,7 +526,7 @@ static bpf_insn op2insn_st(unsigned opcode, const uint32_t imm)
ALU_CASE_FETCH(XOR); ALU_CASE_FETCH(XOR);
COMPLEX_CASE(XCHG); COMPLEX_CASE(XCHG);
COMPLEX_CASE(CMPXCHG); COMPLEX_CASE(CMPXCHG);
default: // Could only be reached if complex atomic operation is used without fetch modifier, or not as DW default: // Reached if complex atomic operation is used without fetch modifier
return BPF_INS_INVALID; return BPF_INS_INVALID;
} }
} }