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ARM: net: bpf: 64-bit accessor functions for BPF registers 

Provide a couple of 64-bit register accessors, and use them where
appropriate

Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Signed-off-by: Daniel Borkmann <daniel@iogearbox.net>
This commit is contained in:
Russell King 2018-07-11 10:31:57 +01:00 committed by Daniel Borkmann
parent 7a98702563
commit a6eccac507
1 changed files with 122 additions and 113 deletions
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235
arch/arm/net/bpf_jit_32.c
View File

@ -478,6 +478,17 @@ static s8 arm_bpf_get_reg32(s8 reg, s8 tmp, struct jit_ctx *ctx)
return reg;
}
static const s8 *arm_bpf_get_reg64(const s8 *reg, const s8 *tmp,
struct jit_ctx *ctx)
{
if (is_stacked(reg[1])) {
emit(ARM_LDR_I(tmp[1], ARM_SP, STACK_VAR(reg[1])), ctx);
emit(ARM_LDR_I(tmp[0], ARM_SP, STACK_VAR(reg[0])), ctx);
reg = tmp;
}
return reg;
}
/* If a BPF register is on the stack (stk is true), save the register
* back to the stack. If the source register is not the same, then
* move it into the correct register.
@ -490,6 +501,20 @@ static void arm_bpf_put_reg32(s8 reg, s8 src, struct jit_ctx *ctx)
emit(ARM_MOV_R(reg, src), ctx);
}
static void arm_bpf_put_reg64(const s8 *reg, const s8 *src,
struct jit_ctx *ctx)
{
if (is_stacked(reg[1])) {
emit(ARM_STR_I(src[1], ARM_SP, STACK_VAR(reg[1])), ctx);
emit(ARM_STR_I(src[0], ARM_SP, STACK_VAR(reg[0])), ctx);
} else {
if (reg[1] != src[1])
emit(ARM_MOV_R(reg[1], src[1]), ctx);
if (reg[0] != src[0])
emit(ARM_MOV_R(reg[0], src[0]), ctx);
}
}
static inline void emit_a32_mov_i(const s8 dst, const u32 val,
struct jit_ctx *ctx)
{
@ -669,18 +694,16 @@ static inline void emit_a32_alu_i(const s8 dst, const u32 val,
static inline void emit_a32_neg64(const s8 dst[],
struct jit_ctx *ctx){
const s8 *tmp = bpf2a32[TMP_REG_1];
s8 rd, rm;
const s8 *rd;
/* Setup Operand */
rd = arm_bpf_get_reg32(dst_lo, tmp[1], ctx);
rm = arm_bpf_get_reg32(dst_hi, tmp[0], ctx);
rd = arm_bpf_get_reg64(dst, tmp, ctx);
/* Do Negate Operation */
emit(ARM_RSBS_I(rd, rd, 0), ctx);
emit(ARM_RSC_I(rm, rm, 0), ctx);
emit(ARM_RSBS_I(rd[1], rd[1], 0), ctx);
emit(ARM_RSC_I(rd[0], rd[0], 0), ctx);
arm_bpf_put_reg32(dst_lo, rd, ctx);
arm_bpf_put_reg32(dst_hi, rm, ctx);
arm_bpf_put_reg64(dst, rd, ctx);
}
/* dst = dst << src */
@ -688,20 +711,20 @@ static inline void emit_a32_lsh_r64(const s8 dst[], const s8 src[],
struct jit_ctx *ctx) {
const s8 *tmp = bpf2a32[TMP_REG_1];
const s8 *tmp2 = bpf2a32[TMP_REG_2];
s8 rt, rd, rm;
const s8 *rd;
s8 rt;
/* Setup Operands */
rt = arm_bpf_get_reg32(src_lo, tmp2[1], ctx);
rd = arm_bpf_get_reg32(dst_lo, tmp[1], ctx);
rm = arm_bpf_get_reg32(dst_hi, tmp[0], ctx);
rd = arm_bpf_get_reg64(dst, tmp, ctx);
/* Do LSH operation */
emit(ARM_SUB_I(ARM_IP, rt, 32), ctx);
emit(ARM_RSB_I(tmp2[0], rt, 32), ctx);
emit(ARM_MOV_SR(ARM_LR, rm, SRTYPE_ASL, rt), ctx);
emit(ARM_ORR_SR(ARM_LR, ARM_LR, rd, SRTYPE_ASL, ARM_IP), ctx);
emit(ARM_ORR_SR(ARM_IP, ARM_LR, rd, SRTYPE_LSR, tmp2[0]), ctx);
emit(ARM_MOV_SR(ARM_LR, rd, SRTYPE_ASL, rt), ctx);
emit(ARM_MOV_SR(ARM_LR, rd[0], SRTYPE_ASL, rt), ctx);
emit(ARM_ORR_SR(ARM_LR, ARM_LR, rd[1], SRTYPE_ASL, ARM_IP), ctx);
emit(ARM_ORR_SR(ARM_IP, ARM_LR, rd[1], SRTYPE_LSR, tmp2[0]), ctx);
emit(ARM_MOV_SR(ARM_LR, rd[1], SRTYPE_ASL, rt), ctx);
arm_bpf_put_reg32(dst_lo, ARM_LR, ctx);
arm_bpf_put_reg32(dst_hi, ARM_IP, ctx);
@ -712,21 +735,21 @@ static inline void emit_a32_arsh_r64(const s8 dst[], const s8 src[],
struct jit_ctx *ctx) {
const s8 *tmp = bpf2a32[TMP_REG_1];
const s8 *tmp2 = bpf2a32[TMP_REG_2];
s8 rt, rd, rm;
const s8 *rd;
s8 rt;
/* Setup Operands */
rt = arm_bpf_get_reg32(src_lo, tmp2[1], ctx);
rd = arm_bpf_get_reg32(dst_lo, tmp[1], ctx);
rm = arm_bpf_get_reg32(dst_hi, tmp[0], ctx);
rd = arm_bpf_get_reg64(dst, tmp, ctx);
/* Do the ARSH operation */
emit(ARM_RSB_I(ARM_IP, rt, 32), ctx);
emit(ARM_SUBS_I(tmp2[0], rt, 32), ctx);
emit(ARM_MOV_SR(ARM_LR, rd, SRTYPE_LSR, rt), ctx);
emit(ARM_ORR_SR(ARM_LR, ARM_LR, rm, SRTYPE_ASL, ARM_IP), ctx);
emit(ARM_MOV_SR(ARM_LR, rd[1], SRTYPE_LSR, rt), ctx);
emit(ARM_ORR_SR(ARM_LR, ARM_LR, rd[0], SRTYPE_ASL, ARM_IP), ctx);
_emit(ARM_COND_MI, ARM_B(0), ctx);
emit(ARM_ORR_SR(ARM_LR, ARM_LR, rm, SRTYPE_ASR, tmp2[0]), ctx);
emit(ARM_MOV_SR(ARM_IP, rm, SRTYPE_ASR, rt), ctx);
emit(ARM_ORR_SR(ARM_LR, ARM_LR, rd[0], SRTYPE_ASR, tmp2[0]), ctx);
emit(ARM_MOV_SR(ARM_IP, rd[0], SRTYPE_ASR, rt), ctx);
arm_bpf_put_reg32(dst_lo, ARM_LR, ctx);
arm_bpf_put_reg32(dst_hi, ARM_IP, ctx);
@ -737,20 +760,20 @@ static inline void emit_a32_rsh_r64(const s8 dst[], const s8 src[],
struct jit_ctx *ctx) {
const s8 *tmp = bpf2a32[TMP_REG_1];
const s8 *tmp2 = bpf2a32[TMP_REG_2];
s8 rt, rd, rm;
const s8 *rd;
s8 rt;
/* Setup Operands */
rt = arm_bpf_get_reg32(src_lo, tmp2[1], ctx);
rd = arm_bpf_get_reg32(dst_lo, tmp[1], ctx);
rm = arm_bpf_get_reg32(dst_hi, tmp[0], ctx);
rd = arm_bpf_get_reg64(dst, tmp, ctx);
/* Do RSH operation */
emit(ARM_RSB_I(ARM_IP, rt, 32), ctx);
emit(ARM_SUBS_I(tmp2[0], rt, 32), ctx);
emit(ARM_MOV_SR(ARM_LR, rd, SRTYPE_LSR, rt), ctx);
emit(ARM_ORR_SR(ARM_LR, ARM_LR, rm, SRTYPE_ASL, ARM_IP), ctx);
emit(ARM_ORR_SR(ARM_LR, ARM_LR, rm, SRTYPE_LSR, tmp2[0]), ctx);
emit(ARM_MOV_SR(ARM_IP, rm, SRTYPE_LSR, rt), ctx);
emit(ARM_MOV_SR(ARM_LR, rd[1], SRTYPE_LSR, rt), ctx);
emit(ARM_ORR_SR(ARM_LR, ARM_LR, rd[0], SRTYPE_ASL, ARM_IP), ctx);
emit(ARM_ORR_SR(ARM_LR, ARM_LR, rd[0], SRTYPE_LSR, tmp2[0]), ctx);
emit(ARM_MOV_SR(ARM_IP, rd[0], SRTYPE_LSR, rt), ctx);
arm_bpf_put_reg32(dst_lo, ARM_LR, ctx);
arm_bpf_put_reg32(dst_hi, ARM_IP, ctx);
@ -761,27 +784,25 @@ static inline void emit_a32_lsh_i64(const s8 dst[],
const u32 val, struct jit_ctx *ctx){
const s8 *tmp = bpf2a32[TMP_REG_1];
const s8 *tmp2 = bpf2a32[TMP_REG_2];
s8 rd, rm;
const s8 *rd;
/* Setup operands */
rd = arm_bpf_get_reg32(dst_lo, tmp[1], ctx);
rm = arm_bpf_get_reg32(dst_hi, tmp[0], ctx);
rd = arm_bpf_get_reg64(dst, tmp, ctx);
/* Do LSH operation */
if (val < 32) {
emit(ARM_MOV_SI(tmp2[0], rm, SRTYPE_ASL, val), ctx);
emit(ARM_ORR_SI(rm, tmp2[0], rd, SRTYPE_LSR, 32 - val), ctx);
emit(ARM_MOV_SI(rd, rd, SRTYPE_ASL, val), ctx);
emit(ARM_MOV_SI(tmp2[0], rd[0], SRTYPE_ASL, val), ctx);
emit(ARM_ORR_SI(rd[0], tmp2[0], rd[1], SRTYPE_LSR, 32 - val), ctx);
emit(ARM_MOV_SI(rd[1], rd[1], SRTYPE_ASL, val), ctx);
} else {
if (val == 32)
emit(ARM_MOV_R(rm, rd), ctx);
emit(ARM_MOV_R(rd[0], rd[1]), ctx);
else
emit(ARM_MOV_SI(rm, rd, SRTYPE_ASL, val - 32), ctx);
emit(ARM_EOR_R(rd, rd, rd), ctx);
emit(ARM_MOV_SI(rd[0], rd[1], SRTYPE_ASL, val - 32), ctx);
emit(ARM_EOR_R(rd[1], rd[1], rd[1]), ctx);
}
arm_bpf_put_reg32(dst_lo, rd, ctx);
arm_bpf_put_reg32(dst_hi, rm, ctx);
arm_bpf_put_reg64(dst, rd, ctx);
}
/* dst = dst >> val */
@ -789,27 +810,25 @@ static inline void emit_a32_rsh_i64(const s8 dst[],
const u32 val, struct jit_ctx *ctx) {
const s8 *tmp = bpf2a32[TMP_REG_1];
const s8 *tmp2 = bpf2a32[TMP_REG_2];
s8 rd, rm;
const s8 *rd;
/* Setup operands */
rd = arm_bpf_get_reg32(dst_lo, tmp[1], ctx);
rm = arm_bpf_get_reg32(dst_hi, tmp[0], ctx);
rd = arm_bpf_get_reg64(dst, tmp, ctx);
/* Do LSR operation */
if (val < 32) {
emit(ARM_MOV_SI(tmp2[1], rd, SRTYPE_LSR, val), ctx);
emit(ARM_ORR_SI(rd, tmp2[1], rm, SRTYPE_ASL, 32 - val), ctx);
emit(ARM_MOV_SI(rm, rm, SRTYPE_LSR, val), ctx);
emit(ARM_MOV_SI(tmp2[1], rd[1], SRTYPE_LSR, val), ctx);
emit(ARM_ORR_SI(rd[1], tmp2[1], rd[0], SRTYPE_ASL, 32 - val), ctx);
emit(ARM_MOV_SI(rd[0], rd[0], SRTYPE_LSR, val), ctx);
} else if (val == 32) {
emit(ARM_MOV_R(rd, rm), ctx);
emit(ARM_MOV_I(rm, 0), ctx);
emit(ARM_MOV_R(rd[1], rd[0]), ctx);
emit(ARM_MOV_I(rd[0], 0), ctx);
} else {
emit(ARM_MOV_SI(rd, rm, SRTYPE_LSR, val - 32), ctx);
emit(ARM_MOV_I(rm, 0), ctx);
emit(ARM_MOV_SI(rd[1], rd[0], SRTYPE_LSR, val - 32), ctx);
emit(ARM_MOV_I(rd[0], 0), ctx);
}
arm_bpf_put_reg32(dst_lo, rd, ctx);
arm_bpf_put_reg32(dst_hi, rm, ctx);
arm_bpf_put_reg64(dst, rd, ctx);
}
/* dst = dst >> val (signed) */
@ -817,51 +836,47 @@ static inline void emit_a32_arsh_i64(const s8 dst[],
const u32 val, struct jit_ctx *ctx){
const s8 *tmp = bpf2a32[TMP_REG_1];
const s8 *tmp2 = bpf2a32[TMP_REG_2];
s8 rd, rm;
const s8 *rd;
/* Setup operands */
rd = arm_bpf_get_reg32(dst_lo, tmp[1], ctx);
rm = arm_bpf_get_reg32(dst_hi, tmp[0], ctx);
rd = arm_bpf_get_reg64(dst, tmp, ctx);
/* Do ARSH operation */
if (val < 32) {
emit(ARM_MOV_SI(tmp2[1], rd, SRTYPE_LSR, val), ctx);
emit(ARM_ORR_SI(rd, tmp2[1], rm, SRTYPE_ASL, 32 - val), ctx);
emit(ARM_MOV_SI(rm, rm, SRTYPE_ASR, val), ctx);
emit(ARM_MOV_SI(tmp2[1], rd[1], SRTYPE_LSR, val), ctx);
emit(ARM_ORR_SI(rd[1], tmp2[1], rd[0], SRTYPE_ASL, 32 - val), ctx);
emit(ARM_MOV_SI(rd[0], rd[0], SRTYPE_ASR, val), ctx);
} else if (val == 32) {
emit(ARM_MOV_R(rd, rm), ctx);
emit(ARM_MOV_SI(rm, rm, SRTYPE_ASR, 31), ctx);
emit(ARM_MOV_R(rd[1], rd[0]), ctx);
emit(ARM_MOV_SI(rd[0], rd[0], SRTYPE_ASR, 31), ctx);
} else {
emit(ARM_MOV_SI(rd, rm, SRTYPE_ASR, val - 32), ctx);
emit(ARM_MOV_SI(rm, rm, SRTYPE_ASR, 31), ctx);
emit(ARM_MOV_SI(rd[1], rd[0], SRTYPE_ASR, val - 32), ctx);
emit(ARM_MOV_SI(rd[0], rd[0], SRTYPE_ASR, 31), ctx);
}
arm_bpf_put_reg32(dst_lo, rd, ctx);
arm_bpf_put_reg32(dst_hi, rm, ctx);
arm_bpf_put_reg64(dst, rd, ctx);
}
static inline void emit_a32_mul_r64(const s8 dst[], const s8 src[],
struct jit_ctx *ctx) {
const s8 *tmp = bpf2a32[TMP_REG_1];
const s8 *tmp2 = bpf2a32[TMP_REG_2];
s8 rd, rm, rt, rn;
const s8 *rd, *rt;
/* Setup operands for multiplication */
rd = arm_bpf_get_reg32(dst_lo, tmp[1], ctx);
rm = arm_bpf_get_reg32(dst_hi, tmp[0], ctx);
rt = arm_bpf_get_reg32(src_lo, tmp2[1], ctx);
rn = arm_bpf_get_reg32(src_hi, tmp2[0], ctx);
rd = arm_bpf_get_reg64(dst, tmp, ctx);
rt = arm_bpf_get_reg64(src, tmp2, ctx);
/* Do Multiplication */
emit(ARM_MUL(ARM_IP, rd, rn), ctx);
emit(ARM_MUL(ARM_LR, rm, rt), ctx);
emit(ARM_MUL(ARM_IP, rd[1], rt[0]), ctx);
emit(ARM_MUL(ARM_LR, rd[0], rt[1]), ctx);
emit(ARM_ADD_R(ARM_LR, ARM_IP, ARM_LR), ctx);
emit(ARM_UMULL(ARM_IP, rm, rd, rt), ctx);
emit(ARM_ADD_R(rm, ARM_LR, rm), ctx);
emit(ARM_UMULL(ARM_IP, rd[0], rd[1], rt[1]), ctx);
emit(ARM_ADD_R(rd[0], ARM_LR, rd[0]), ctx);
arm_bpf_put_reg32(dst_lo, ARM_IP, ctx);
arm_bpf_put_reg32(dst_hi, rm, ctx);
arm_bpf_put_reg32(dst_hi, rd[0], ctx);
}
/* *(size *)(dst + off) = src */
@ -918,17 +933,17 @@ static inline void emit_ldx_r(const s8 dst[], const s8 src,
case BPF_B:
/* Load a Byte */
emit(ARM_LDRB_I(rd[1], rm, off), ctx);
emit_a32_mov_i(dst[0], 0, ctx);
emit_a32_mov_i(rd[0], 0, ctx);
break;
case BPF_H:
/* Load a HalfWord */
emit(ARM_LDRH_I(rd[1], rm, off), ctx);
emit_a32_mov_i(dst[0], 0, ctx);
emit_a32_mov_i(rd[0], 0, ctx);
break;
case BPF_W:
/* Load a Word */
emit(ARM_LDR_I(rd[1], rm, off), ctx);
emit_a32_mov_i(dst[0], 0, ctx);
emit_a32_mov_i(rd[0], 0, ctx);
break;
case BPF_DW:
/* Load a Double Word */
@ -936,9 +951,7 @@ static inline void emit_ldx_r(const s8 dst[], const s8 src,
emit(ARM_LDR_I(rd[0], rm, off + 4), ctx);
break;
}
arm_bpf_put_reg32(dst[1], rd[1], ctx);
if (sz == BPF_DW)
arm_bpf_put_reg32(dst[0], rd[0], ctx);
arm_bpf_put_reg64(dst, rd, ctx);
}
/* Arithmatic Operation */
@ -982,11 +995,12 @@ static int emit_bpf_tail_call(struct jit_ctx *ctx)
const s8 *tmp = bpf2a32[TMP_REG_1];
const s8 *tmp2 = bpf2a32[TMP_REG_2];
const s8 *tcc = bpf2a32[TCALL_CNT];
const s8 *tc;
const int idx0 = ctx->idx;
#define cur_offset (ctx->idx - idx0)
#define jmp_offset (out_offset - (cur_offset) - 2)
u32 off, lo, hi;
s8 r_array, r_index, r_tc_lo, r_tc_hi;
s8 r_array, r_index;
/* if (index >= array->map.max_entries)
* goto out;
@ -1008,15 +1022,13 @@ static int emit_bpf_tail_call(struct jit_ctx *ctx)
*/
lo = (u32)MAX_TAIL_CALL_CNT;
hi = (u32)((u64)MAX_TAIL_CALL_CNT >> 32);
r_tc_lo = arm_bpf_get_reg32(tcc[1], tmp[1], ctx);
r_tc_hi = arm_bpf_get_reg32(tcc[0], tmp[0], ctx);
emit(ARM_CMP_I(r_tc_hi, hi), ctx);
_emit(ARM_COND_EQ, ARM_CMP_I(r_tc_lo, lo), ctx);
tc = arm_bpf_get_reg64(tcc, tmp, ctx);
emit(ARM_CMP_I(tc[0], hi), ctx);
_emit(ARM_COND_EQ, ARM_CMP_I(tc[1], lo), ctx);
_emit(ARM_COND_HI, ARM_B(jmp_offset), ctx);
emit(ARM_ADDS_I(r_tc_lo, r_tc_lo, 1), ctx);
emit(ARM_ADC_I(r_tc_hi, r_tc_hi, 0), ctx);
arm_bpf_put_reg32(tcc[1], r_tc_lo, ctx);
arm_bpf_put_reg32(tcc[0], r_tc_hi, ctx);
emit(ARM_ADDS_I(tc[1], tc[1], 1), ctx);
emit(ARM_ADC_I(tc[0], tc[0], 0), ctx);
arm_bpf_put_reg64(tcc, tmp, ctx);
/* prog = array->ptrs[index]
* if (prog == NULL)
@ -1183,7 +1195,8 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
const s32 imm = insn->imm;
const int i = insn - ctx->prog->insnsi;
const bool is64 = BPF_CLASS(code) == BPF_ALU64;
s8 rd, rt, rm, rn;
const s8 *rd, *rs;
s8 rd_lo, rt, rm, rn;
s32 jmp_offset;
#define check_imm(bits, imm) do { \
@ -1270,7 +1283,7 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
case BPF_ALU | BPF_DIV | BPF_X:
case BPF_ALU | BPF_MOD | BPF_K:
case BPF_ALU | BPF_MOD | BPF_X:
rd = arm_bpf_get_reg32(dst_lo, tmp2[1], ctx);
rd_lo = arm_bpf_get_reg32(dst_lo, tmp2[1], ctx);
switch (BPF_SRC(code)) {
case BPF_X:
rt = arm_bpf_get_reg32(src_lo, tmp2[0], ctx);
@ -1283,8 +1296,8 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
rt = src_lo;
break;
}
emit_udivmod(rd, rd, rt, ctx, BPF_OP(code));
arm_bpf_put_reg32(dst_lo, rd, ctx);
emit_udivmod(rd_lo, rd_lo, rt, ctx, BPF_OP(code));
arm_bpf_put_reg32(dst_lo, rd_lo, ctx);
emit_a32_mov_i(dst_hi, 0, ctx);
break;
case BPF_ALU64 | BPF_DIV | BPF_K:
@ -1364,21 +1377,20 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
/* dst = htobe(dst) */
case BPF_ALU | BPF_END | BPF_FROM_LE:
case BPF_ALU | BPF_END | BPF_FROM_BE:
rt = arm_bpf_get_reg32(dst_lo, tmp[1], ctx);
rd = arm_bpf_get_reg32(dst_hi, tmp[0], ctx);
rd = arm_bpf_get_reg64(dst, tmp, ctx);
if (BPF_SRC(code) == BPF_FROM_LE)
goto emit_bswap_uxt;
switch (imm) {
case 16:
emit_rev16(rt, rt, ctx);
emit_rev16(rd[1], rd[1], ctx);
goto emit_bswap_uxt;
case 32:
emit_rev32(rt, rt, ctx);
emit_rev32(rd[1], rd[1], ctx);
goto emit_bswap_uxt;
case 64:
emit_rev32(ARM_LR, rt, ctx);
emit_rev32(rt, rd, ctx);
emit(ARM_MOV_R(rd, ARM_LR), ctx);
emit_rev32(ARM_LR, rd[1], ctx);
emit_rev32(rd[1], rd[0], ctx);
emit(ARM_MOV_R(rd[0], ARM_LR), ctx);
break;
}
goto exit;
@ -1388,23 +1400,22 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
/* zero-extend 16 bits into 64 bits */
#if __LINUX_ARM_ARCH__ < 6
emit_a32_mov_i(tmp2[1], 0xffff, ctx);
emit(ARM_AND_R(rt, rt, tmp2[1]), ctx);
emit(ARM_AND_R(rd[1], rd[1], tmp2[1]), ctx);
#else /* ARMv6+ */
emit(ARM_UXTH(rt, rt), ctx);
emit(ARM_UXTH(rd[1], rd[1]), ctx);
#endif
emit(ARM_EOR_R(rd, rd, rd), ctx);
emit(ARM_EOR_R(rd[0], rd[0], rd[0]), ctx);
break;
case 32:
/* zero-extend 32 bits into 64 bits */
emit(ARM_EOR_R(rd, rd, rd), ctx);
emit(ARM_EOR_R(rd[0], rd[0], rd[0]), ctx);
break;
case 64:
/* nop */
break;
}
exit:
arm_bpf_put_reg32(dst_lo, rt, ctx);
arm_bpf_put_reg32(dst_hi, rd, ctx);
arm_bpf_put_reg64(dst, rd, ctx);
break;
/* dst = imm64 */
case BPF_LD | BPF_IMM | BPF_DW:
@ -1459,15 +1470,14 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
{
u8 sz = BPF_SIZE(code);
rn = arm_bpf_get_reg32(src_lo, tmp2[1], ctx);
rm = arm_bpf_get_reg32(src_hi, tmp2[0], ctx);
rs = arm_bpf_get_reg64(src, tmp2, ctx);
/* Store the value */
if (BPF_SIZE(code) == BPF_DW) {
emit_str_r(dst_lo, rn, off, ctx, BPF_W);
emit_str_r(dst_lo, rm, off+4, ctx, BPF_W);
emit_str_r(dst_lo, rs[1], off, ctx, BPF_W);
emit_str_r(dst_lo, rs[0], off+4, ctx, BPF_W);
} else {
emit_str_r(dst_lo, rn, off, ctx, sz);
emit_str_r(dst_lo, rs[1], off, ctx, sz);
}
break;
}
@ -1527,11 +1537,10 @@ static int build_insn(const struct bpf_insn *insn, struct jit_ctx *ctx)
emit_a32_mov_i64(true, tmp2, imm, ctx);
go_jmp:
/* Setup destination register */
rt = arm_bpf_get_reg32(dst_lo, tmp[1], ctx);
rd = arm_bpf_get_reg32(dst_hi, tmp[0], ctx);
rd = arm_bpf_get_reg64(dst, tmp, ctx);
/* Check for the condition */
emit_ar_r(rd, rt, rm, rn, ctx, BPF_OP(code));
emit_ar_r(rd[0], rd[1], rm, rn, ctx, BPF_OP(code));
/* Setup JUMP instruction */
jmp_offset = bpf2a32_offset(i+off, i, ctx);