diff options
Diffstat (limited to 'sys/i386/i386/bpf_jit_machdep.h')
| -rw-r--r-- | sys/i386/i386/bpf_jit_machdep.h | 83 |
1 files changed, 50 insertions, 33 deletions
diff --git a/sys/i386/i386/bpf_jit_machdep.h b/sys/i386/i386/bpf_jit_machdep.h index d2eca52..c3c06cf 100644 --- a/sys/i386/i386/bpf_jit_machdep.h +++ b/sys/i386/i386/bpf_jit_machdep.h @@ -244,6 +244,24 @@ typedef void (*emit_func)(bpf_bin_stream *stream, u_int value, u_int n); (3 << 6) | ((sr32 & 0x7) << 3) | (dr32 & 0x7), 1); \ } while (0) +/* testl i32,r32 */ +#define TESTid(i32, r32) do { \ + if (r32 == EAX) { \ + emitm(&stream, 0xa9, 1); \ + } else { \ + emitm(&stream, 0xf7, 1); \ + emitm(&stream, (3 << 6) | r32, 1); \ + } \ + emitm(&stream, i32, 4); \ +} while (0) + +/* testl sr32,dr32 */ +#define TESTrd(sr32, dr32) do { \ + emitm(&stream, 0x85, 1); \ + emitm(&stream, \ + (3 << 6) | ((sr32 & 0x7) << 3) | (dr32 & 0x7), 1); \ +} while (0) + /* orl sr32,dr32 */ #define ORrd(sr32, dr32) do { \ emitm(&stream, 0x09, 1); \ @@ -319,42 +337,12 @@ typedef void (*emit_func)(bpf_bin_stream *stream, u_int value, u_int n); emitm(&stream, off8, 1); \ } while (0) -/* je off32 */ -#define JE(off32) do { \ - emitm(&stream, 0x840f, 2); \ - emitm(&stream, off32, 4); \ -} while (0) - -/* jle off8 */ -#define JLEb(off8) do { \ - emitm(&stream, 0x7e, 1); \ +/* jbe off8 */ +#define JBEb(off8) do { \ + emitm(&stream, 0x76, 1); \ emitm(&stream, off8, 1); \ } while (0) -/* ja off32 */ -#define JA(off32) do { \ - emitm(&stream, 0x870f, 2); \ - emitm(&stream, off32, 4); \ -} while (0) - -/* jae off32 */ -#define JAE(off32) do { \ - emitm(&stream, 0x830f, 2); \ - emitm(&stream, off32, 4); \ -} while (0) - -/* jg off32 */ -#define JG(off32) do { \ - emitm(&stream, 0x8f0f, 2); \ - emitm(&stream, off32, 4); \ -} while (0) - -/* jge off32 */ -#define JGE(off32) do { \ - emitm(&stream, 0x8d0f, 2); \ - emitm(&stream, off32, 4); \ -} while (0) - /* jmp off32 */ #define JMP(off32) do { \ emitm(&stream, 0xe9, 1); \ @@ -367,4 +355,33 @@ typedef void (*emit_func)(bpf_bin_stream *stream, u_int value, u_int n); emitm(&stream, (3 << 6) | ((r32 & 0x7) << 3) | (r32 & 0x7), 1); \ } while (0) +/* + * Conditional long jumps + */ +#define JB 0x82 +#define JAE 0x83 +#define JE 0x84 +#define JNE 0x85 +#define JBE 0x86 +#define JA 0x87 + +#define JCC(t, f) do { \ + if (ins->jt != 0 && ins->jf != 0) { \ + /* 5 is the size of the following jmp */ \ + emitm(&stream, ((t) << 8) | 0x0f, 2); \ + emitm(&stream, stream.refs[stream.bpf_pc + ins->jt] - \ + stream.refs[stream.bpf_pc] + 5, 4); \ + JMP(stream.refs[stream.bpf_pc + ins->jf] - \ + stream.refs[stream.bpf_pc]); \ + } else if (ins->jt != 0) { \ + emitm(&stream, ((t) << 8) | 0x0f, 2); \ + emitm(&stream, stream.refs[stream.bpf_pc + ins->jt] - \ + stream.refs[stream.bpf_pc], 4); \ + } else { \ + emitm(&stream, ((f) << 8) | 0x0f, 2); \ + emitm(&stream, stream.refs[stream.bpf_pc + ins->jf] - \ + stream.refs[stream.bpf_pc], 4); \ + } \ +} while (0) + #endif /* _BPF_JIT_MACHDEP_H_ */ |
