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unicorn_arm: Treat registers as unsigned values in casts

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It isn't particularly advisable to treat these as signed values, given
the registers themselves have no notion of signedness associated with
them.
This commit is contained in:
Lioncash 2019-04-26 08:21:23 -04:00
parent f419015aa3
commit 6d80445fe1
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GPG Key ID: 4E3C3CC1031BA9C7
1 changed files with 13 additions and 13 deletions
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26
qemu/target/arm/unicorn_arm.c
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@ -60,44 +60,44 @@ int arm_reg_read(struct uc_struct *uc, unsigned int *regs, void **vals, int coun
unsigned int regid = regs[i];
void *value = vals[i];
if (regid >= UC_ARM_REG_R0 && regid <= UC_ARM_REG_R12) {
*(int32_t *)value = state->regs[regid - UC_ARM_REG_R0];
*(uint32_t *)value = state->regs[regid - UC_ARM_REG_R0];
} else if (regid >= UC_ARM_REG_D0 && regid <= UC_ARM_REG_D31) {
const float64 *d_reg = aa32_vfp_dreg(state, regid - UC_ARM_REG_D0);
*(float64 *)value = *d_reg;
} else {
switch(regid) {
case UC_ARM_REG_APSR:
*(int32_t *)value = cpsr_read(state) & CPSR_NZCV;
*(uint32_t *)value = cpsr_read(state) & CPSR_NZCV;
break;
case UC_ARM_REG_CPSR: {
// Bits 20-23 should always read as zero.
const uint32_t mask = 0xFF0FFFFF;
*(int32_t *)value = cpsr_read(state) & mask;
*(uint32_t *)value = cpsr_read(state) & mask;
break;
}
//case UC_ARM_REG_SP:
case UC_ARM_REG_R13:
*(int32_t *)value = state->regs[13];
*(uint32_t *)value = state->regs[13];
break;
//case UC_ARM_REG_LR:
case UC_ARM_REG_R14:
*(int32_t *)value = state->regs[14];
*(uint32_t *)value = state->regs[14];
break;
//case UC_ARM_REG_PC:
case UC_ARM_REG_R15:
*(int32_t *)value = state->regs[15];
*(uint32_t *)value = state->regs[15];
break;
case UC_ARM_REG_C1_C0_2:
*(int32_t *)value = state->cp15.cpacr_el1;
*(uint32_t *)value = state->cp15.cpacr_el1;
break;
case UC_ARM_REG_C13_C0_3:
*(int32_t *)value = state->cp15.tpidrro_el[0];
*(uint32_t *)value = state->cp15.tpidrro_el[0];
break;
case UC_ARM_REG_FPEXC:
*(int32_t *)value = state->vfp.xregs[ARM_VFP_FPEXC];
*(uint32_t *)value = state->vfp.xregs[ARM_VFP_FPEXC];
break;
case UC_ARM_REG_FPSCR:
*(int32_t *)value = vfp_get_fpscr(state);
*(uint32_t *)value = vfp_get_fpscr(state);
break;
case UC_ARM_REG_IPSR:
*(uint32_t *)value = xpsr_read(state) & XPSR_EXCP;
@ -163,14 +163,14 @@ int arm_reg_write(struct uc_struct *uc, unsigned int *regs, void* const* vals, i
break;
case UC_ARM_REG_C1_C0_2:
state->cp15.cpacr_el1 = *(int32_t *)value;
state->cp15.cpacr_el1 = *(uint32_t *)value;
break;
case UC_ARM_REG_C13_C0_3:
state->cp15.tpidrro_el[0] = *(int32_t *)value;
state->cp15.tpidrro_el[0] = *(uint32_t *)value;
break;
case UC_ARM_REG_FPEXC:
state->vfp.xregs[ARM_VFP_FPEXC] = *(int32_t *)value;
state->vfp.xregs[ARM_VFP_FPEXC] = *(uint32_t *)value;
break;
case UC_ARM_REG_FPSCR:
vfp_set_fpscr(state, *(uint32_t *)value);