diff options
Diffstat (limited to 'lib/arm/transform-dis-arm-multi.inc.h')
| -rw-r--r-- | lib/arm/transform-dis-arm-multi.inc.h | 121 |
1 files changed, 24 insertions, 97 deletions
diff --git a/lib/arm/transform-dis-arm-multi.inc.h b/lib/arm/transform-dis-arm-multi.inc.h index f1b9b80..001e613 100644 --- a/lib/arm/transform-dis-arm-multi.inc.h +++ b/lib/arm/transform-dis-arm-multi.inc.h @@ -1,80 +1,4 @@ -static inline void PUSHone(struct transform_dis_ctx *ctx, int Rt) { - if (ctx->arch.pc_low_bit) - op32(ctx, 0x0d04f84d | Rt << 28); - else - op32(ctx, 0xe52d0004 | Rt << 12); -} - -static inline void POPone(struct transform_dis_ctx *ctx, int Rt) { - if (ctx->arch.pc_low_bit) - op32(ctx, 0x0b04f85d | Rt << 28); - else - op32(ctx, 0xe49d0004 | Rt << 12); -} - -static inline void POPmulti(struct transform_dis_ctx *ctx, uint16_t mask) { - if (ctx->arch.pc_low_bit) - op32(ctx, 0x0000e8bd | mask << 16); - else - op32(ctx, 0xe8bd0000 | mask); -} - -static inline void MOVW_MOVT(struct transform_dis_ctx *ctx, int Rd, uint32_t val) { - uint16_t hi = val >> 16, lo = (uint16_t) val; - if (ctx->arch.pc_low_bit) { - op32(ctx, 0x0000f240 | Rd << 24 | lo >> 12 | (lo >> 11 & 1) << 10 | - (lo >> 8 & 7) << 28 | (lo & 0xff) << 16); - op32(ctx, 0x0000f2c0 | Rd << 24 | hi >> 12 | (hi >> 11 & 1) << 10 | - (hi >> 8 & 7) << 28 | (hi & 0xff) << 16); - - } else { - op32(ctx, 0xe3000000 | Rd << 12 | (lo >> 12) << 16 | (lo & 0xfff)); - op32(ctx, 0xe3400000 | Rd << 12 | (hi >> 12) << 16 | (hi & 0xfff)); - } - -} - -static inline void STRri(struct transform_dis_ctx *ctx, int Rt, int Rn, uint32_t off) { - if (ctx->arch.pc_low_bit) - op32(ctx, 0x0000f8c0 | Rn | Rt << 28 | off << 16); - else - op32(ctx, 0xe4800000 | Rn << 16 | Rt << 12 | off); -} - -static inline void LDRxi(struct transform_dis_ctx *ctx, int Rt, int Rn, uint32_t off, - enum pcrel_load_mode load_mode) { - if (ctx->arch.pc_low_bit) { - int subop, sign; - switch (load_mode) { - case PLM_U8: subop = 0; sign = 0; break; - case PLM_S8: subop = 0; sign = 1; break; - case PLM_U16: subop = 1; sign = 0; break; - case PLM_S16: subop = 1; sign = 1; break; - case PLM_U32: subop = 2; sign = 0; break; - default: __builtin_abort(); - } - op32(ctx, 0x0000f890 | Rn | Rt << 28 | subop << 5 | sign << 8 | off << 16); - } else { - int is_byte, subop, not_ldrd; - switch (load_mode) { - case PLM_U8: is_byte = 1; goto type1; - case PLM_S8: subop = 13; not_ldrd = 1; goto type2; - case PLM_U16: subop = 11; not_ldrd = 1; goto type2; - case PLM_S16: subop = 15; not_ldrd = 1; goto type2; - case PLM_U32: is_byte = 0; goto type1; - case PLM_U128: subop = 13; not_ldrd = 0; goto type2; - type1: - op32(ctx, 0xe5900000 | Rn << 16 | Rt << 12 | off); - break; - type2: - op32(ctx, 0xe1c00000 | Rn << 16 | Rt << 12 | subop << 4 | - (off & 0xf) | (off & 0xf0) << 4 | not_ldrd << 20); - break; - default: - __builtin_abort(); - } - } -} +#include "arm/assemble.h" static NOINLINE UNUSED void transform_dis_data(struct transform_dis_ctx *ctx, unsigned o0, unsigned o1, unsigned o2, unsigned o3, unsigned out_mask) { @@ -91,7 +15,7 @@ static NOINLINE UNUSED void transform_dis_data(struct transform_dis_ctx *ctx, newval[2] = o2; newval[3] = o3; - void **rpp = ctx->rewritten_ptr_ptr; + void **codep = ctx->rewritten_ptr_ptr; /* A few cases: * 1. Move to PC that does not read PC. Probably fine. @@ -130,32 +54,33 @@ static NOINLINE UNUSED void transform_dis_data(struct transform_dis_ctx *ctx, if (in_regs & 1 << 15) return; /* case 1 */ /* case 2 */ - PUSHone(ctx, scratch); - PUSHone(ctx, scratch); - MOVW_MOVT(ctx, scratch, pc); + PUSHone(codep, scratch); + PUSHone(codep, scratch); + MOVW_MOVT(codep, scratch, pc); for (int i = 0; i < 4; i++) if (newval[i] == 15) newval[i] = scratch; - ctx->write_newop_here = *rpp; *rpp += ctx->op_size; - STRri(ctx, scratch, 13, 4); - POPmulti(ctx, 1 << scratch | 1 << 15); + ctx->write_newop_here = *codep; *codep += ctx->op_size; + STRri(codep, scratch, 13, 4); + POPmulti(codep, 1 << scratch | 1 << 15); + transform_dis_ret(ctx); } else { if (out_reg != -1 && !(in_regs & 1 << out_reg)) { /* case 3 - ignore scratch */ - MOVW_MOVT(ctx, out_reg, pc); + MOVW_MOVT(codep, out_reg, pc); for (int i = 0; i < 4; i++) if (newval[i] == 15) newval[i] = out_reg; - ctx->write_newop_here = *rpp; *rpp += ctx->op_size; + ctx->write_newop_here = *codep; *codep += ctx->op_size; } else { /* case 4 */ - PUSHone(ctx, scratch); - MOVW_MOVT(ctx, scratch, pc); + PUSHone(codep, scratch); + MOVW_MOVT(codep, scratch, pc); for (int i = 0; i < 4; i++) if (newval[i] == 15) newval[i] = scratch; ctx->write_newop_here = *rpp; *rpp += ctx->op_size; - POPone(ctx, scratch); + POPone(codep, scratch); } } ctx->modify = true; @@ -172,18 +97,20 @@ static NOINLINE UNUSED void transform_dis_pcrel(struct transform_dis_ctx *ctx, (void *) dpc, reg, load_mode); #endif ctx->write_newop_here = NULL; + void **codep = ctx->rewritten_ptr_ptr; if (reg == 15) { int scratch = 0; - PUSHone(ctx, scratch); - PUSHone(ctx, scratch); - MOVW_MOVT(ctx, scratch, dpc); + PUSHone(codep, scratch); + PUSHone(codep, scratch); + MOVW_MOVT(codep, scratch, dpc); if (load_mode != PLM_ADR) - LDRxi(ctx, scratch, scratch, 0, load_mode); - STRri(ctx, scratch, 13, 4); - POPmulti(ctx, 1 << scratch | 1 << 15); + LDRxi(codep, scratch, scratch, 0, load_mode); + STRri(codep, scratch, 13, 4); + POPmulti(codep, 1 << scratch | 1 << 15); + transform_dis_ret(codep); } else { - MOVW_MOVT(ctx, reg, dpc); + MOVW_MOVT(codep, reg, dpc); if (load_mode != PLM_ADR) - LDRxi(ctx, reg, reg, 0, load_mode); + LDRxi(codep, reg, reg, 0, load_mode); } } |