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f02ec3ff3f
Add unit tests for movsx insns. Signed-off-by: Yonghong Song <yonghong.song@linux.dev> Link: https://lore.kernel.org/r/20230728011309.3719295-1-yonghong.song@linux.dev Signed-off-by: Alexei Starovoitov <ast@kernel.org>
214 lines
4.1 KiB
C
214 lines
4.1 KiB
C
// SPDX-License-Identifier: GPL-2.0
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#include <linux/bpf.h>
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#include <bpf/bpf_helpers.h>
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#include "bpf_misc.h"
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#if defined(__TARGET_ARCH_x86) && __clang_major__ >= 18
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SEC("socket")
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__description("MOV32SX, S8")
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__success __success_unpriv __retval(0x23)
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__naked void mov32sx_s8(void)
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{
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asm volatile (" \
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w0 = 0xff23; \
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w0 = (s8)w0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("MOV32SX, S16")
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__success __success_unpriv __retval(0xFFFFff23)
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__naked void mov32sx_s16(void)
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{
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asm volatile (" \
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w0 = 0xff23; \
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w0 = (s16)w0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("MOV64SX, S8")
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__success __success_unpriv __retval(-2)
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__naked void mov64sx_s8(void)
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{
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asm volatile (" \
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r0 = 0x1fe; \
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r0 = (s8)r0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("MOV64SX, S16")
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__success __success_unpriv __retval(0xf23)
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__naked void mov64sx_s16(void)
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{
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asm volatile (" \
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r0 = 0xf0f23; \
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r0 = (s16)r0; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("MOV64SX, S32")
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__success __success_unpriv __retval(-1)
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__naked void mov64sx_s32(void)
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{
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asm volatile (" \
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r0 = 0xfffffffe; \
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r0 = (s32)r0; \
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r0 >>= 1; \
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exit; \
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" ::: __clobber_all);
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}
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SEC("socket")
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__description("MOV32SX, S8, range_check")
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__success __success_unpriv __retval(1)
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__naked void mov32sx_s8_range(void)
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{
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asm volatile (" \
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call %[bpf_get_prandom_u32]; \
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w1 = (s8)w0; \
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/* w1 with s8 range */ \
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if w1 s> 0x7f goto l0_%=; \
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if w1 s< -0x80 goto l0_%=; \
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r0 = 1; \
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l1_%=: \
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exit; \
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l0_%=: \
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r0 = 2; \
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goto l1_%=; \
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" :
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: __imm(bpf_get_prandom_u32)
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: __clobber_all);
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}
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SEC("socket")
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__description("MOV32SX, S16, range_check")
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__success __success_unpriv __retval(1)
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__naked void mov32sx_s16_range(void)
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{
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asm volatile (" \
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call %[bpf_get_prandom_u32]; \
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w1 = (s16)w0; \
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/* w1 with s16 range */ \
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if w1 s> 0x7fff goto l0_%=; \
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if w1 s< -0x80ff goto l0_%=; \
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r0 = 1; \
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l1_%=: \
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exit; \
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l0_%=: \
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r0 = 2; \
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goto l1_%=; \
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" :
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: __imm(bpf_get_prandom_u32)
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: __clobber_all);
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}
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SEC("socket")
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__description("MOV32SX, S16, range_check 2")
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__success __success_unpriv __retval(1)
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__naked void mov32sx_s16_range_2(void)
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{
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asm volatile (" \
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r1 = 65535; \
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w2 = (s16)w1; \
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r2 >>= 1; \
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if r2 != 0x7fffFFFF goto l0_%=; \
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r0 = 1; \
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l1_%=: \
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exit; \
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l0_%=: \
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r0 = 0; \
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goto l1_%=; \
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" :
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: __imm(bpf_get_prandom_u32)
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: __clobber_all);
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}
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SEC("socket")
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__description("MOV64SX, S8, range_check")
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__success __success_unpriv __retval(1)
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__naked void mov64sx_s8_range(void)
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{
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asm volatile (" \
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call %[bpf_get_prandom_u32]; \
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r1 = (s8)r0; \
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/* r1 with s8 range */ \
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if r1 s> 0x7f goto l0_%=; \
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if r1 s< -0x80 goto l0_%=; \
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r0 = 1; \
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l1_%=: \
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exit; \
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l0_%=: \
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r0 = 2; \
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goto l1_%=; \
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" :
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: __imm(bpf_get_prandom_u32)
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: __clobber_all);
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}
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SEC("socket")
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__description("MOV64SX, S16, range_check")
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__success __success_unpriv __retval(1)
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__naked void mov64sx_s16_range(void)
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{
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asm volatile (" \
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call %[bpf_get_prandom_u32]; \
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r1 = (s16)r0; \
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/* r1 with s16 range */ \
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if r1 s> 0x7fff goto l0_%=; \
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if r1 s< -0x8000 goto l0_%=; \
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r0 = 1; \
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l1_%=: \
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exit; \
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l0_%=: \
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r0 = 2; \
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goto l1_%=; \
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" :
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: __imm(bpf_get_prandom_u32)
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: __clobber_all);
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}
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SEC("socket")
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__description("MOV64SX, S32, range_check")
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__success __success_unpriv __retval(1)
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__naked void mov64sx_s32_range(void)
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{
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asm volatile (" \
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call %[bpf_get_prandom_u32]; \
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r1 = (s32)r0; \
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/* r1 with s32 range */ \
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if r1 s> 0x7fffffff goto l0_%=; \
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if r1 s< -0x80000000 goto l0_%=; \
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r0 = 1; \
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l1_%=: \
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exit; \
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l0_%=: \
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r0 = 2; \
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goto l1_%=; \
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" :
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: __imm(bpf_get_prandom_u32)
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: __clobber_all);
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}
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#else
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SEC("socket")
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__description("cpuv4 is not supported by compiler or jit, use a dummy test")
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__success
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int dummy_test(void)
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{
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return 0;
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}
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#endif
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char _license[] SEC("license") = "GPL";
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