Re: [PATCH 10/24] bsd-user/arm/target_arch_reg.h: Implement core dump register copying

[Kyle Evans]

On Tue, Oct 19, 2021 at 11:45 AM Warner Losh <imp@bsdimp.com> wrote:
>
> Implement the register copying routines to extract registers from the
> cpu for core dump generation.
>
> Signed-off-by: Stacey Son <sson@FreeBSD.org>
> Signed-off-by: Warner Losh <imp@bsdimp.com>
> ---
>  bsd-user/arm/target_arch_reg.h | 60 ++++++++++++++++++++++++++++++++++
>  1 file changed, 60 insertions(+)
>  create mode 100644 bsd-user/arm/target_arch_reg.h
>
> diff --git a/bsd-user/arm/target_arch_reg.h b/bsd-user/arm/target_arch_reg.h
> new file mode 100644
> index 0000000000..ef5ed5154f
> --- /dev/null
> +++ b/bsd-user/arm/target_arch_reg.h
> @@ -0,0 +1,60 @@
> +/*
> + *  FreeBSD arm register structures
> + *
> + *  Copyright (c) 2015 Stacey Son
> + *
> + *  This program is free software; you can redistribute it and/or modify
> + *  it under the terms of the GNU General Public License as published by
> + *  the Free Software Foundation; either version 2 of the License, or
> + *  (at your option) any later version.
> + *
> + *  This program is distributed in the hope that it will be useful,
> + *  but WITHOUT ANY WARRANTY; without even the implied warranty of
> + *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
> + *  GNU General Public License for more details.
> + *
> + *  You should have received a copy of the GNU General Public License
> + *  along with this program; if not, see <http://www.gnu.org/licenses/>.
> + */
> +
> +#ifndef _TARGET_ARCH_REG_H_
> +#define _TARGET_ARCH_REG_H_
> +
> +/* See sys/arm/include/reg.h */
> +typedef struct target_reg {
> +    uint32_t        r[13];
> +    uint32_t        r_sp;
> +    uint32_t        r_lr;
> +    uint32_t        r_pc;
> +    uint32_t        r_cpsr;
> +} target_reg_t;
> +
> +typedef struct target_fp_reg {
> +    uint32_t        fp_exponent;
> +    uint32_t        fp_mantissa_hi;
> +    u_int32_t       fp_mantissa_lo;
> +} target_fp_reg_t;
> +
> +typedef struct target_fpreg {
> +    uint32_t        fpr_fpsr;
> +    target_fp_reg_t fpr[8];
> +} target_fpreg_t;
> +
> +#define tswapreg(ptr)   tswapal(ptr)
> +
> +static inline void target_copy_regs(target_reg_t *regs, const CPUARMState 
> *env)
> +{
> +    int i;
> +
> +    for (i = 0; i < 13; i++) {
> +        regs->r[i] = tswapreg(env->regs[i + 1]);
> +    }
> +    regs->r_sp = tswapreg(env->regs[13]);
> +    regs->r_lr = tswapreg(env->regs[14]);
> +    regs->r_pc = tswapreg(env->regs[15]);
> +    regs->r_cpsr = tswapreg(cpsr_read((CPUARMState *)env));
> +}
> +
> +#undef tswapreg
> +
> +#endif /* !_TARGET_ARCH_REG_H_ */
> --
> 2.32.0
>

Reviewed-by: Kyle Evans <kevans@FreeBSD.org>