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Ports/gdb: Add basic ptrace based native target for SerenityOS/i386
This patch adds a ptrace based gdb backend, which is then enlightended to known how to read the serenity i386 registers via ptrace. This is just a basic implementation to get the port bootstrapped.
This commit is contained in:
Brian Gianforcaro
Brian Gianforcaro
parent
6137b9f272
commit
e308536005
Notes:
sideshowbarker
2024-07-17 22:00:29 +09:00
Author: https://github.com/bgianfo Commit: https://github.com/SerenityOS/serenity/commit/e3085360050 Pull-request: https://github.com/SerenityOS/serenity/pull/11278
421
Ports/gdb/patches/basic-ptrace-i386-native-target.patch
Normal file
421
Ports/gdb/patches/basic-ptrace-i386-native-target.patch
Normal file
@ -0,0 +1,421 @@
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From 581bbef892960b1533aa9d9918f5eeee4bff9cce Mon Sep 17 00:00:00 2001
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From: Brian Gianforcaro <b.gianfo@gmail.com>
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Date: Tue, 28 Dec 2021 04:35:47 -0800
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Subject: [PATCH 2/3] serenity: Add basic ptrace based native target for
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SerenityOS/i386
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---
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gdb/configure.host | 3 ++
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gdb/configure.nat | 11 +++++
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gdb/configure.tgt | 4 ++
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gdb/i386-serenity-nat.c | 101 +++++++++++++++++++++++++++++++++++++++
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gdb/i386-serenity-tdep.c | 43 +++++++++++++++++
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gdb/i386-serenity-tdep.h | 8 ++++
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gdb/osabi.c | 1 +
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gdb/osabi.h | 1 +
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gdb/serenity-nat.c | 13 +++++
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gdb/serenity-nat.h | 34 +++++++++++++
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gdb/serenity-tdep.c | 28 +++++++++++
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gdb/serenity-tdep.h | 24 ++++++++++
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12 files changed, 271 insertions(+)
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create mode 100644 gdb/i386-serenity-nat.c
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create mode 100644 gdb/i386-serenity-tdep.c
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create mode 100644 gdb/i386-serenity-tdep.h
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create mode 100644 gdb/serenity-nat.c
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create mode 100644 gdb/serenity-nat.h
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create mode 100644 gdb/serenity-tdep.c
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create mode 100644 gdb/serenity-tdep.h
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diff --git a/gdb/configure.host b/gdb/configure.host
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index e94a19b..06b87ca 100644
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--- a/gdb/configure.host
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+++ b/gdb/configure.host
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@@ -85,6 +85,7 @@ case "${host}" in
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*-*-darwin*) gdb_host=darwin ;;
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aarch64*-*-linux*) gdb_host=linux ;;
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+aarch64*-*-serenity*) gdb_host=serenity ;;
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aarch64*-*-freebsd*) gdb_host=fbsd ;;
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alpha*-*-linux*) gdb_host=alpha-linux ;;
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@@ -117,6 +118,7 @@ i[34567]86-*-linux*) gdb_host=linux ;;
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i[34567]86-*-gnu*) gdb_host=i386gnu ;;
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i[3456]86-*-nto*) gdb_host=nto ;;
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i[34567]86-*-openbsd*) gdb_host=obsd ;;
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+i[34567]86-*-serenity*) gdb_host=serenity ;;
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i[34567]86-*-solaris2* | x86_64-*-solaris2*)
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gdb_host=sol2 ;;
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i[34567]86-*-cygwin*) gdb_host=cygwin ;;
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@@ -185,6 +187,7 @@ x86_64-*-mingw*) gdb_host=mingw64
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gdb_host_obs=mingw-hdep.o
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;;
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x86_64-*-cygwin*) gdb_host=cygwin64 ;;
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+x86_64-*-serenity*) gdb_host=serenity ;;
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m32r*-*-linux*) gdb_host=linux ;;
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xtensa*-*-linux*) gdb_host=linux ;;
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diff --git a/gdb/configure.nat b/gdb/configure.nat
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index e34cccf..38b687e 100644
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--- a/gdb/configure.nat
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+++ b/gdb/configure.nat
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@@ -86,6 +86,9 @@ case ${gdb_host} in
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darwin)
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NATDEPFILES='fork-child.o nat/fork-inferior.o darwin-nat.o \
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darwin-nat-info.o'
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+ ;;
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+ serenity)
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+ NATDEPFILES='fork-child.o nat/fork-inferior.o inf-ptrace.o'
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;;
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sol2)
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NATDEPFILES='fork-child.o nat/fork-inferior.o \
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@@ -477,6 +480,14 @@ case ${gdb_host} in
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;;
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esac
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;;
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+ serenity)
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+ case ${gdb_host_cpu} in
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+ i386)
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+ # Host: SerenityOS/x86_64 ELF
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+ NATDEPFILES="${NATDEPFILES} amd64-nat.o serenity-nat.o i386-serenity-nat.o"
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+ ;;
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+ esac
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+ ;;
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sol2)
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case ${gdb_host_cpu} in
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i386)
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diff --git a/gdb/configure.tgt b/gdb/configure.tgt
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index 97a5a57..886542f 100644
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--- a/gdb/configure.tgt
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+++ b/gdb/configure.tgt
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@@ -291,6 +291,10 @@ i[34567]86-*-nto*)
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gdb_target_obs="solib-svr4.o \
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i386-nto-tdep.o nto-tdep.o"
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;;
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+i[34567]86-*-serenity*)
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+ # Target: SerenityOS/i386
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+ gdb_target_obs="i386-serenity-tdep.o serenity-tdep.o"
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+ ;;
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i[34567]86-*-solaris2* | x86_64-*-solaris2*)
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# Target: Solaris x86_64
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gdb_target_obs="${i386_tobjs} ${amd64_tobjs} \
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diff --git a/gdb/i386-serenity-nat.c b/gdb/i386-serenity-nat.c
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new file mode 100644
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index 0000000..034252a
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--- /dev/null
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+++ b/gdb/i386-serenity-nat.c
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@@ -0,0 +1,101 @@
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+/* Native-dependent code for SerenityOS/i386.
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+
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+ Copyright (C) 2002-2021 Free Software Foundation, Inc.
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+
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+ This file is part of GDB.
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+
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+ This program is free software; you can redistribute it and/or modify
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+ it under the terms of the GNU General Public License as published by
|
||||
+ the Free Software Foundation; either version 3 of the License, or
|
||||
+ (at your option) any later version.
|
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+
|
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+ This program is distributed in the hope that it will be useful,
|
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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+ GNU General Public License for more details.
|
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+
|
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+ You should have received a copy of the GNU General Public License
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+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
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+
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+#include "defs.h"
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+#include "gdbcore.h"
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+#include "regcache.h"
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+#include "regset.h"
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+#include "target.h"
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+
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+#include <sys/arch/i386/regs.h>
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+#include <sys/ptrace.h>
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+
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+#include "i386-tdep.h"
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+#include "serenity-nat.h"
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+
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+/* Register maps. */
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+
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+static const struct regcache_map_entry i386_serenity_gregmap[] =
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+{
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+ { 1, I386_EAX_REGNUM, 0 },
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+ { 1, I386_ECX_REGNUM, 0 },
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+ { 1, I386_EDX_REGNUM, 0 },
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+ { 1, I386_EBX_REGNUM, 0 },
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+ { 1, I386_ESP_REGNUM, 0 },
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+ { 1, I386_EBP_REGNUM, 0 },
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+ { 1, I386_ESI_REGNUM, 0 },
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+ { 1, I386_EDI_REGNUM, 0 },
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+ { 1, I386_EIP_REGNUM, 0 },
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+ { 1, I386_EFLAGS_REGNUM, 0 },
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+ { 1, I386_CS_REGNUM, 0 },
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+ { 1, I386_SS_REGNUM, 0 },
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+ { 1, I386_DS_REGNUM, 0 },
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+ { 1, I386_ES_REGNUM, 0 },
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+ { 1, I386_FS_REGNUM, 0 },
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+ { 1, I386_GS_REGNUM, 0 },
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+ { 0 },
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+};
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+
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+const struct regset i386_serenity_gregset =
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+{
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+ i386_serenity_gregmap, regcache_supply_regset, regcache_collect_regset
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+};
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+
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+class i386_serenity_nat_target final : public serenity_nat_target
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+{
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+ void fetch_registers (struct regcache* cache, int regnum) override
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+ {
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+ if (regnum == -1) {
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+ pid_t pid = get_ptrace_pid (cache->ptid ());
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+ PtraceRegisters regs;
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+
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+ if (ptrace (PT_GETREGS, pid, ®s, 0) == -1)
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+ perror_with_name (_("Couldn't get registers"));
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+
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+ cache->supply_regset (&i386_serenity_gregset, regnum, ®s,
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+ sizeof (regs));
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+ }
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+ };
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+
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+ void store_registers (struct regcache* cache, int regnum) override
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+ {
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+ if (regnum == -1) {
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+ pid_t pid = get_ptrace_pid (cache->ptid ());
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+ PtraceRegisters regs {};
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+
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+ if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
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+ perror_with_name (_("Couldn't get registers"));
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+
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+ cache->collect_regset (&i386_serenity_gregset, regnum, ®s,
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+ sizeof (regs));
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+
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+ if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
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+ perror_with_name (_("Couldn't write registers"));
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+ }
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+ };
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+};
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+
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+static i386_serenity_nat_target the_i386_serenity_nat_target;
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+
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+void _initialize_i386_serenity_nat ();
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+void
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+_initialize_i386_serenity_nat ()
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+{
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+ add_inf_child_target (&the_i386_serenity_nat_target);
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+}
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diff --git a/gdb/i386-serenity-tdep.c b/gdb/i386-serenity-tdep.c
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new file mode 100644
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index 0000000..d384061
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--- /dev/null
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+++ b/gdb/i386-serenity-tdep.c
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@@ -0,0 +1,43 @@
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+/* Target-dependent code for SerenityOS/i386.
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+
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+ Copyright (C) 2003-2021 Free Software Foundation, Inc.
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+
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+ This file is part of GDB.
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+
|
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+ This program is free software; you can redistribute it and/or modify
|
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+ it under the terms of the GNU General Public License as published by
|
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+ the Free Software Foundation; either version 3 of the License, or
|
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+ (at your option) any later version.
|
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+
|
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+ This program is distributed in the hope that it will be useful,
|
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+ but WITHOUT ANY WARRANTY; without even the implied warranty of
|
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+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
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+ GNU General Public License for more details.
|
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+
|
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+ You should have received a copy of the GNU General Public License
|
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+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
|
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+
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+#include "defs.h"
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+#include "arch-utils.h"
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+#include "gdbcore.h"
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+#include "osabi.h"
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+#include "regcache.h"
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+
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+#include "serenity-tdep.h"
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+
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+
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+/* Implement the 'init_osabi' method of struct gdb_osabi_handler. */
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+static void
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+i386_serenity_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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+{
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+ /* Generic SerenityOS support. */
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+ serenity_init_abi (info, gdbarch);
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+}
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+
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+void _initialize_i386_serenity_tdep ();
|
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+void
|
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+_initialize_i386_serenity_tdep ()
|
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+{
|
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+ gdbarch_register_osabi (bfd_arch_i386, 0, GDB_OSABI_SERENITYOS,
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+ i386_serenity_init_abi);
|
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+}
|
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diff --git a/gdb/i386-serenity-tdep.h b/gdb/i386-serenity-tdep.h
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new file mode 100644
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index 0000000..4ee3fba
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--- /dev/null
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+++ b/gdb/i386-serenity-tdep.h
|
||||
@@ -0,0 +1,8 @@
|
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+/* Target-dependent code for SernityOS i386. */
|
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+
|
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+#ifndef I386_SERENITY_TDEP_H
|
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+#define I386_SERENITY_TDEP_H
|
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+
|
||||
+//extern const struct regset i386_serenity_gregset;
|
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+
|
||||
+#endif /* i386-serenity-tdep.h */
|
||||
diff --git a/gdb/osabi.c b/gdb/osabi.c
|
||||
index aabf895..28789e8 100644
|
||||
--- a/gdb/osabi.c
|
||||
+++ b/gdb/osabi.c
|
||||
@@ -82,6 +82,7 @@ static const struct osabi_names gdb_osabi_names[] =
|
||||
{ "Newlib", NULL },
|
||||
{ "SDE", NULL },
|
||||
{ "PikeOS", NULL },
|
||||
+ { "SerenityOS", NULL },
|
||||
|
||||
{ "<invalid>", NULL }
|
||||
};
|
||||
diff --git a/gdb/osabi.h b/gdb/osabi.h
|
||||
index 1ecbed4..73c5549 100644
|
||||
--- a/gdb/osabi.h
|
||||
+++ b/gdb/osabi.h
|
||||
@@ -46,6 +46,7 @@ enum gdb_osabi
|
||||
GDB_OSABI_NEWLIB,
|
||||
GDB_OSABI_SDE,
|
||||
GDB_OSABI_PIKEOS,
|
||||
+ GDB_OSABI_SERENITYOS,
|
||||
|
||||
GDB_OSABI_INVALID /* keep this last */
|
||||
};
|
||||
diff --git a/gdb/serenity-nat.c b/gdb/serenity-nat.c
|
||||
new file mode 100644
|
||||
index 0000000..ff740d4
|
||||
--- /dev/null
|
||||
+++ b/gdb/serenity-nat.c
|
||||
@@ -0,0 +1,13 @@
|
||||
+/* Native-dependent code for SerenityOS */
|
||||
+
|
||||
+#include "defs.h"
|
||||
+#include "gdbthread.h"
|
||||
+#include "inferior.h"
|
||||
+#include "target.h"
|
||||
+
|
||||
+#include <sys/types.h>
|
||||
+#include <sys/ptrace.h>
|
||||
+#include "gdbsupport/gdb_wait.h"
|
||||
+
|
||||
+#include "inf-child.h"
|
||||
+#include "serenity-nat.h"
|
||||
\ No newline at end of file
|
||||
diff --git a/gdb/serenity-nat.h b/gdb/serenity-nat.h
|
||||
new file mode 100644
|
||||
index 0000000..ac3cfaa
|
||||
--- /dev/null
|
||||
+++ b/gdb/serenity-nat.h
|
||||
@@ -0,0 +1,34 @@
|
||||
+/* Native-dependent code for SerenityOS. */
|
||||
+
|
||||
+#ifndef SERENITYOS_NAT_H
|
||||
+#define SERENITYOS_NAT_H
|
||||
+
|
||||
+#include "inf-ptrace.h"
|
||||
+
|
||||
+/* A prototype generic Serenity target.
|
||||
+ A concrete instance should override it with local methods.
|
||||
+*/
|
||||
+
|
||||
+class serenity_nat_target : public inf_ptrace_target
|
||||
+{
|
||||
+#if 0
|
||||
+ /* Override some methods to support threads. */
|
||||
+ std::string pid_to_str (ptid_t) override;
|
||||
+ void update_thread_list () override;
|
||||
+ ptid_t wait (ptid_t, struct target_waitstatus *, target_wait_flags) override;
|
||||
+
|
||||
+#ifdef PT_GET_PROCESS_STATE
|
||||
+ void follow_fork (bool, bool) override;
|
||||
+
|
||||
+ int insert_fork_catchpoint (int) override;
|
||||
+
|
||||
+ int remove_fork_catchpoint (int) override;
|
||||
+
|
||||
+ void post_startup_inferior (ptid_t) override;
|
||||
+
|
||||
+ void post_attach (int) override;
|
||||
+#endif
|
||||
+#endif
|
||||
+};
|
||||
+
|
||||
+#endif /* serenity-nat.h */
|
||||
diff --git a/gdb/serenity-tdep.c b/gdb/serenity-tdep.c
|
||||
new file mode 100644
|
||||
index 0000000..45981b2
|
||||
--- /dev/null
|
||||
+++ b/gdb/serenity-tdep.c
|
||||
@@ -0,0 +1,28 @@
|
||||
+/* Target-dependent code for SerenityOS, architecture-independent.
|
||||
+
|
||||
+ Copyright (C) 2002-2021 Free Software Foundation, Inc.
|
||||
+
|
||||
+ 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 3 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/>. */
|
||||
+
|
||||
+
|
||||
+#include "defs.h"
|
||||
+#include "arch-utils.h"
|
||||
+#include "gdbcore.h"
|
||||
+
|
||||
+#include "serenity-tdep.h"
|
||||
+
|
||||
+void serenity_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
|
||||
+{
|
||||
+ /* NOP for now */
|
||||
+}
|
||||
diff --git a/gdb/serenity-tdep.h b/gdb/serenity-tdep.h
|
||||
new file mode 100644
|
||||
index 0000000..43048c6
|
||||
--- /dev/null
|
||||
+++ b/gdb/serenity-tdep.h
|
||||
@@ -0,0 +1,24 @@
|
||||
+/* Target-dependent code for SerenityOS, architecture independent.
|
||||
+
|
||||
+ Copyright (C) 2009-2021 Free Software Foundation, Inc.
|
||||
+
|
||||
+ 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 3 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 SERENITY_TDEP_H
|
||||
+#define SERENITY_TDEP_H
|
||||
+
|
||||
+extern void serenity_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch);
|
||||
+
|
||||
+#endif /* serenity-tdep.h */
|
||||
--
|
||||
2.32.0
|
||||
|
||||
Loading…
Reference in New Issue
Block a user