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Re: [PATCH 3/8] gdb/s390: Fill pseudo register agent expression hooks.
- From: Andreas Arnez <arnez at linux dot vnet dot ibm dot com>
- To: Marcin KoÅcielnicki <koriakin at 0x04 dot net>
- Cc: gdb-patches at sourceware dot org
- Date: Fri, 11 Mar 2016 10:58:21 +0100
- Subject: Re: [PATCH 3/8] gdb/s390: Fill pseudo register agent expression hooks.
- Authentication-results: sourceware.org; auth=none
- References: <1453637529-26972-4-git-send-email-koriakin at 0x04 dot net> <1454853711-18349-1-git-send-email-koriakin at 0x04 dot net>
On Sun, Feb 07 2016, Marcin KoÅcielnicki wrote:
> gdb/ChangeLog:
>
> * s390-linux-tdep.c (s390_ax_pseudo_register_collect): New function.
> (s390_ax_pseudo_register_push_stack): New function.
> (s390_gdbarch_init): Fill ax_pseudo_register_collect and
> ax_pseudo_register_push_stack hooks.
> ---
> Added missing comments.
>
> gdb/ChangeLog | 7 +++++
> gdb/s390-linux-tdep.c | 84 +++++++++++++++++++++++++++++++++++++++++++++++++++
> 2 files changed, 91 insertions(+)
>
> diff --git a/gdb/ChangeLog b/gdb/ChangeLog
> index d24cccd..6260040 100644
> --- a/gdb/ChangeLog
> +++ b/gdb/ChangeLog
> @@ -1,5 +1,12 @@
> 2016-02-07 Marcin KoÅcielnicki <koriakin@0x04.net>
>
> + * s390-linux-tdep.c (s390_ax_pseudo_register_collect): New function.
> + (s390_ax_pseudo_register_push_stack): New function.
> + (s390_gdbarch_init): Fill ax_pseudo_register_collect and
> + ax_pseudo_register_push_stack hooks.
> +
> +2016-02-07 Marcin KoÅcielnicki <koriakin@0x04.net>
> +
> * s390-linux-tdep.c (s390_supply_pseudo_pc): New function.
> (s390_gdbarch_init): Fill supply_pseudo_pc hook.
>
> diff --git a/gdb/s390-linux-tdep.c b/gdb/s390-linux-tdep.c
> index 144365c..97bd564 100644
> --- a/gdb/s390-linux-tdep.c
> +++ b/gdb/s390-linux-tdep.c
> @@ -547,6 +547,86 @@ s390_pseudo_register_reggroup_p (struct gdbarch *gdbarch, int regnum,
> return default_register_reggroup_p (gdbarch, regnum, group);
> }
>
> +/* The "ax_pseudo_register_collect" gdbarch method. */
> +
> +static int
> +s390_ax_pseudo_register_collect (struct gdbarch *gdbarch,
> + struct agent_expr *ax, int regnum)
> +{
> + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
> + if (regnum == tdep->pc_regnum)
> + {
> + ax_reg_mask (ax, S390_PSWA_REGNUM);
> + }
> + else if (regnum == tdep->cc_regnum)
> + {
> + ax_reg_mask (ax, S390_PSWM_REGNUM);
> + }
> + else if (regnum_is_gpr_full (tdep, regnum))
> + {
> + regnum -= tdep->gpr_full_regnum;
> + ax_reg_mask (ax, S390_R0_REGNUM + regnum);
> + ax_reg_mask (ax, S390_R0_UPPER_REGNUM + regnum);
> + }
> + else if (regnum_is_vxr_full (tdep, regnum))
> + {
> + regnum -= tdep->v0_full_regnum;
> + ax_reg_mask (ax, S390_F0_REGNUM + regnum);
> + ax_reg_mask (ax, S390_V0_LOWER_REGNUM + regnum);
> + }
> + else
> + {
> + internal_error (__FILE__, __LINE__, _("invalid regnum"));
> + }
> + return 0;
> +}
> +
> +/* The "ax_pseudo_register_push_stack" gdbarch method. */
> +
> +static int
> +s390_ax_pseudo_register_push_stack (struct gdbarch *gdbarch,
> + struct agent_expr *ax, int regnum)
> +{
> + struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
> + if (regnum == tdep->pc_regnum)
> + {
> + ax_reg (ax, S390_PSWA_REGNUM);
> + if (register_size (gdbarch, S390_PSWA_REGNUM) == 4)
> + {
> + ax_zero_ext (ax, 31);
> + }
> + }
> + else if (regnum == tdep->cc_regnum)
> + {
> + ax_reg (ax, S390_PSWM_REGNUM);
> + if (register_size (gdbarch, S390_PSWA_REGNUM) == 4)
> + ax_const_l (ax, 12);
> + else
> + ax_const_l (ax, 44);
> + ax_simple (ax, aop_rsh_unsigned);
> + ax_zero_ext (ax, 2);
> + }
> + else if (regnum_is_gpr_full (tdep, regnum))
> + {
> + regnum -= tdep->gpr_full_regnum;
> + ax_reg (ax, S390_R0_REGNUM + regnum);
> + ax_reg (ax, S390_R0_UPPER_REGNUM + regnum);
> + ax_const_l (ax, 32);
> + ax_simple (ax, aop_lsh);
> + ax_simple (ax, aop_bit_or);
> + }
> + else if (regnum_is_vxr_full (tdep, regnum))
> + {
> + /* Too large to stuff on the stack. */
> + return 1;
> + }
> + else
> + {
> + internal_error (__FILE__, __LINE__, _("invalid regnum"));
> + }
> + return 0;
> +}
> +
>
> /* A helper for s390_software_single_step, decides if an instruction
> is a partial-execution instruction that needs to be executed until
> @@ -7886,6 +7966,10 @@ s390_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
> set_tdesc_pseudo_register_type (gdbarch, s390_pseudo_register_type);
> set_tdesc_pseudo_register_reggroup_p (gdbarch,
> s390_pseudo_register_reggroup_p);
> + set_gdbarch_ax_pseudo_register_collect (gdbarch,
> + s390_ax_pseudo_register_collect);
> + set_gdbarch_ax_pseudo_register_push_stack
> + (gdbarch, s390_ax_pseudo_register_push_stack);
> tdesc_use_registers (gdbarch, tdesc, tdesc_data);
> set_gdbarch_register_name (gdbarch, s390_register_name);
Thanks, this is OK.