From: Simon Marchi <simon.marchi@polymtl.ca>
To: gdb-patches@sourceware.org
Cc: Simon Marchi <simon.marchi@efficios.com>
Subject: [PATCH 23/24] gdb: migrate arm to new gdbarch_pseudo_register_write
Date: Wed, 8 Nov 2023 00:01:07 -0500 [thread overview]
Message-ID: <20231108051222.1275306-24-simon.marchi@polymtl.ca> (raw)
In-Reply-To: <20231108051222.1275306-1-simon.marchi@polymtl.ca>
From: Simon Marchi <simon.marchi@efficios.com>
Make arm use the new gdbarch_pseudo_register_write. This fixes writing
pseudo registers to non-current frames for that architecture.
Change-Id: Icb2a649ab6394817844230e9e94c3d0564d2f765
---
gdb/arm-tdep.c | 62 +++++++++++++++++++++++++++++---------------------
1 file changed, 36 insertions(+), 26 deletions(-)
diff --git a/gdb/arm-tdep.c b/gdb/arm-tdep.c
index 9bf51485b800..a0d019b564bf 100644
--- a/gdb/arm-tdep.c
+++ b/gdb/arm-tdep.c
@@ -9908,57 +9908,67 @@ arm_neon_quad_write (struct gdbarch *gdbarch, struct regcache *regcache,
regcache->raw_write (double_regnum + 1, buf + 8);
}
+static void
+arm_neon_quad_write (gdbarch *gdbarch, frame_info_ptr next_frame,
+ int quad_reg_index, gdb::array_view<const gdb_byte> buf)
+{
+ std::string raw_reg_name = string_printf ("d%d", quad_reg_index << 1);
+ int double_regnum
+ = user_reg_map_name_to_regnum (gdbarch, raw_reg_name.data (),
+ raw_reg_name.length ());
+
+ pseudo_to_concat_raw (next_frame, buf, double_regnum, double_regnum + 1);
+}
+
/* Store the contents of BUF to the MVE pseudo register REGNUM. */
static void
-arm_mve_pseudo_write (struct gdbarch *gdbarch, struct regcache *regcache,
- int regnum, const gdb_byte *buf)
+arm_mve_pseudo_write (gdbarch *gdbarch, frame_info_ptr next_frame,
+ int pseudo_reg_num, gdb::array_view<const gdb_byte> buf)
{
arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
/* P0 is the first 16 bits of VPR. */
- regcache->raw_write_part (tdep->mve_vpr_regnum, 0, 2, buf);
+ pseudo_to_raw_part(next_frame, buf, tdep->mve_vpr_regnum, 0);
}
static void
-arm_pseudo_write (struct gdbarch *gdbarch, struct regcache *regcache,
- int regnum, const gdb_byte *buf)
+arm_pseudo_write (gdbarch *gdbarch, frame_info_ptr next_frame,
+ const int pseudo_reg_num,
+ gdb::array_view<const gdb_byte> buf)
{
- const int num_regs = gdbarch_num_regs (gdbarch);
- char name_buf[4];
- gdb_byte reg_buf[8];
- int offset, double_regnum;
arm_gdbarch_tdep *tdep = gdbarch_tdep<arm_gdbarch_tdep> (gdbarch);
- gdb_assert (regnum >= num_regs);
+ gdb_assert (pseudo_reg_num >= gdbarch_num_regs (gdbarch));
- if (is_q_pseudo (gdbarch, regnum))
+ if (is_q_pseudo (gdbarch, pseudo_reg_num))
{
/* Quad-precision register. */
- arm_neon_quad_write (gdbarch, regcache,
- regnum - tdep->q_pseudo_base, buf);
+ arm_neon_quad_write (gdbarch, next_frame,
+ pseudo_reg_num - tdep->q_pseudo_base, buf);
}
- else if (is_mve_pseudo (gdbarch, regnum))
- arm_mve_pseudo_write (gdbarch, regcache, regnum, buf);
+ else if (is_mve_pseudo (gdbarch, pseudo_reg_num))
+ arm_mve_pseudo_write (gdbarch, next_frame, pseudo_reg_num, buf);
else
{
- regnum -= tdep->s_pseudo_base;
+ int s_reg_index = pseudo_reg_num - tdep->s_pseudo_base;
+
/* Single-precision register. */
- gdb_assert (regnum < 32);
+ gdb_assert (s_reg_index < 32);
/* s0 is always the least significant half of d0. */
+ int offset;
if (gdbarch_byte_order (gdbarch) == BFD_ENDIAN_BIG)
- offset = (regnum & 1) ? 0 : 4;
+ offset = (s_reg_index & 1) ? 0 : 4;
else
- offset = (regnum & 1) ? 4 : 0;
+ offset = (s_reg_index & 1) ? 4 : 0;
- xsnprintf (name_buf, sizeof (name_buf), "d%d", regnum >> 1);
- double_regnum = user_reg_map_name_to_regnum (gdbarch, name_buf,
- strlen (name_buf));
+ std::string raw_reg_name = string_printf ("d%d", s_reg_index >> 1);
+ int double_regnum
+ = user_reg_map_name_to_regnum (gdbarch, raw_reg_name.c_str (),
+ raw_reg_name.length ());
- regcache->raw_read (double_regnum, reg_buf);
- memcpy (reg_buf + offset, buf, 4);
- regcache->raw_write (double_regnum, reg_buf);
+ pseudo_to_raw_part (next_frame, buf, double_regnum, offset);
}
}
@@ -10918,7 +10928,7 @@ arm_gdbarch_init (struct gdbarch_info info, struct gdbarch_list *arches)
{
set_gdbarch_num_pseudo_regs (gdbarch, num_pseudos);
set_gdbarch_pseudo_register_read_value (gdbarch, arm_pseudo_read_value);
- set_gdbarch_deprecated_pseudo_register_write (gdbarch, arm_pseudo_write);
+ set_gdbarch_pseudo_register_write (gdbarch, arm_pseudo_write);
}
/* Add standard register aliases. We add aliases even for those
--
2.42.1
next prev parent reply other threads:[~2023-11-08 5:21 UTC|newest]
Thread overview: 51+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-11-08 5:00 [PATCH 00/24] Fix reading and writing pseudo registers in non-current frames Simon Marchi
2023-11-08 5:00 ` [PATCH 01/24] gdb: don't handle i386 k registers as pseudo registers Simon Marchi
2023-11-11 19:29 ` John Baldwin
2023-11-08 5:00 ` [PATCH 02/24] gdb: use reg_buffer_common throughout gdbsupport/common-regcache.h Simon Marchi
2023-11-11 19:42 ` John Baldwin
2023-11-08 5:00 ` [PATCH 03/24] gdb: make store_integer take an array_view Simon Marchi
2023-11-08 5:00 ` [PATCH 04/24] gdb: simplify conditions in regcache::{read,write,raw_collect,raw_supply}_part Simon Marchi
2023-11-08 5:00 ` [PATCH 05/24] gdb: change regcache interface to use array_view Simon Marchi
2023-11-13 13:43 ` Andrew Burgess
2023-11-13 14:00 ` Andrew Burgess
2023-11-13 16:47 ` Simon Marchi
2023-11-08 5:00 ` [PATCH 06/24] gdb: fix bugs in {get,put}_frame_register_bytes Simon Marchi
2023-11-13 15:00 ` Andrew Burgess
2023-11-13 19:51 ` Simon Marchi
2023-11-08 5:00 ` [PATCH 07/24] gdb: make put_frame_register take an array_view Simon Marchi
2023-11-08 5:00 ` [PATCH 08/24] gdb: change value_of_register and value_of_register_lazy to take the next frame Simon Marchi
2023-11-08 5:00 ` [PATCH 09/24] gdb: remove frame_register Simon Marchi
2023-11-08 5:00 ` [PATCH 10/24] gdb: make put_frame_register take the next frame Simon Marchi
2023-11-08 5:00 ` [PATCH 11/24] gdb: make put_frame_register_bytes " Simon Marchi
2023-11-08 5:00 ` [PATCH 12/24] gdb: make get_frame_register_bytes " Simon Marchi
2023-11-08 5:00 ` [PATCH 13/24] gdb: add value::allocate_register Simon Marchi
2023-11-08 5:00 ` [PATCH 14/24] gdb: read pseudo register through frame Simon Marchi
2023-11-11 20:11 ` John Baldwin
2023-11-08 5:00 ` [PATCH 15/24] gdb: change parameter name in frame_unwind_register_unsigned declaration Simon Marchi
2023-11-08 5:01 ` [PATCH 16/24] gdb: rename gdbarch_pseudo_register_write to gdbarch_deprecated_pseudo_register_write Simon Marchi
2023-11-14 12:12 ` Andrew Burgess
2023-11-14 15:16 ` Simon Marchi
2023-11-08 5:01 ` [PATCH 17/24] gdb: add gdbarch_pseudo_register_write that takes a frame Simon Marchi
2023-11-14 12:20 ` Andrew Burgess
2023-11-14 15:20 ` Simon Marchi
2023-11-08 5:01 ` [PATCH 18/24] gdb: migrate i386 and amd64 to the new gdbarch_pseudo_register_write Simon Marchi
2023-11-11 20:16 ` John Baldwin
2023-11-13 2:59 ` Simon Marchi
2023-11-08 5:01 ` [PATCH 19/24] gdb: make aarch64_za_offsets_from_regnum return za_offsets Simon Marchi
2023-11-08 5:01 ` [PATCH 20/24] gdb: add missing raw register read in aarch64_sme_pseudo_register_write Simon Marchi
2023-11-08 5:01 ` [PATCH 21/24] gdb: migrate aarch64 to new gdbarch_pseudo_register_write Simon Marchi
2023-11-08 5:01 ` [PATCH 22/24] gdb: migrate arm to gdbarch_pseudo_register_read_value Simon Marchi
2023-11-08 5:01 ` Simon Marchi [this message]
2023-11-08 5:01 ` [PATCH 24/24] gdb/testsuite: add tests for unwinding of pseudo registers Simon Marchi
2023-11-08 5:16 ` [PATCH 00/24] Fix reading and writing pseudo registers in non-current frames Simon Marchi
2023-11-09 3:05 ` Simon Marchi
2023-11-08 11:57 ` Luis Machado
2023-11-08 15:47 ` Simon Marchi
2023-11-08 17:08 ` Luis Machado
2023-11-08 19:34 ` Simon Marchi
2023-11-09 19:04 ` Simon Marchi
2023-11-13 13:10 ` Luis Machado
2023-11-13 15:08 ` Luis Machado
2023-11-11 20:26 ` John Baldwin
2023-11-13 3:03 ` Simon Marchi
2023-12-01 16:27 Simon Marchi
2023-12-01 16:27 ` [PATCH 23/24] gdb: migrate arm to new gdbarch_pseudo_register_write Simon Marchi
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