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bsd-user/arm/signal.c: arm get_mcontext

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Get the machine context from the CPU state.

Signed-off-by: Stacey Son <sson@FreeBSD.org>
Signed-off-by: Kyle Evans <kevans@FreeBSD.org>
Signed-off-by: Warner Losh <imp@bsdimp.com>
Reviewed-by: Richard Henderson <richard.henderson@linaro.org>
This commit is contained in:
Warner Losh 2021-09-23 15:22:12 -06:00
parent 781be8666c
commit 38ce1471c9
1 changed files with 51 additions and 0 deletions
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51
bsd-user/arm/signal.c
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@ -58,3 +58,54 @@ abi_long set_sigtramp_args(CPUARMState *env, int sig,
return 0;
}
/*
* Compare to arm/arm/machdep.c get_mcontext()
* Assumes that the memory is locked if mcp points to user memory.
*/
abi_long get_mcontext(CPUARMState *env, target_mcontext_t *mcp, int flags)
{
int err = 0;
uint32_t *gr = mcp->__gregs;
if (mcp->mc_vfp_size != 0 && mcp->mc_vfp_size != sizeof(target_mcontext_vfp_t)) {
return -TARGET_EINVAL;
}
gr[TARGET_REG_CPSR] = tswap32(cpsr_read(env));
if (flags & TARGET_MC_GET_CLEAR_RET) {
gr[TARGET_REG_R0] = 0;
gr[TARGET_REG_CPSR] &= ~CPSR_C;
} else {
gr[TARGET_REG_R0] = tswap32(env->regs[0]);
}
gr[TARGET_REG_R1] = tswap32(env->regs[1]);
gr[TARGET_REG_R2] = tswap32(env->regs[2]);
gr[TARGET_REG_R3] = tswap32(env->regs[3]);
gr[TARGET_REG_R4] = tswap32(env->regs[4]);
gr[TARGET_REG_R5] = tswap32(env->regs[5]);
gr[TARGET_REG_R6] = tswap32(env->regs[6]);
gr[TARGET_REG_R7] = tswap32(env->regs[7]);
gr[TARGET_REG_R8] = tswap32(env->regs[8]);
gr[TARGET_REG_R9] = tswap32(env->regs[9]);
gr[TARGET_REG_R10] = tswap32(env->regs[10]);
gr[TARGET_REG_R11] = tswap32(env->regs[11]);
gr[TARGET_REG_R12] = tswap32(env->regs[12]);
gr[TARGET_REG_SP] = tswap32(env->regs[13]);
gr[TARGET_REG_LR] = tswap32(env->regs[14]);
gr[TARGET_REG_PC] = tswap32(env->regs[15]);
if (mcp->mc_vfp_size != 0 && mcp->mc_vfp_ptr != 0) {
/* see get_vfpcontext in sys/arm/arm/exec_machdep.c */
target_mcontext_vfp_t *vfp;
vfp = lock_user(VERIFY_WRITE, mcp->mc_vfp_ptr, sizeof(*vfp), 0);
for (int i = 0; i < 32; i++) {
vfp->mcv_reg[i] = tswap64(*aa32_vfp_dreg(env, i));
}
vfp->mcv_fpscr = tswap32(vfp_get_fpscr(env));
unlock_user(vfp, mcp->mc_vfp_ptr, sizeof(*vfp));
}
return err;
}