From: Jan Kratochvil <jan.kratochvil@redhat.com>
To: gdb-patches@sourceware.org
Subject: [PATCH v4 12/14] add linux_infcall_mmap
Date: Sun, 23 Nov 2014 19:28:00 -0000 [thread overview]
Message-ID: <20141123192847.32193.82271.stgit@host1.jankratochvil.net> (raw)
In-Reply-To: <20141123192713.32193.57150.stgit@host1.jankratochvil.net>
This implements the new gdbarch "infcall_mmap" method for Linux.
2014-10-07 Jan Kratochvil <jan.kratochvil@redhat.com>
* linux-tdep.c: Include objfiles.h and infcall.h.
(GDB_MMAP_MAP_PRIVATE, GDB_MMAP_MAP_ANONYMOUS, linux_infcall_mmap): New
function.
(linux_init_abi): Add linux_infcall_mmap to gdbarch.
---
gdb/ChangeLog | 7 +++++++
gdb/linux-tdep.c | 49 +++++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 56 insertions(+)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 02c28b2..114fa0f 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,12 @@
2014-10-07 Jan Kratochvil <jan.kratochvil@redhat.com>
+ * linux-tdep.c: Include objfiles.h and infcall.h.
+ (GDB_MMAP_MAP_PRIVATE, GDB_MMAP_MAP_ANONYMOUS, linux_infcall_mmap): New
+ function.
+ (linux_init_abi): Add linux_infcall_mmap to gdbarch.
+
+2014-10-07 Jan Kratochvil <jan.kratochvil@redhat.com>
+
* dwarf2loc.h (dwarf2_reg_to_regnum_or_error): Declare.
* dwarf2loc.c (dwarf2_reg_to_regnum_or_error): Rename from
translate_register. Now public.
diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c
index ffc3e87..485f5ca 100644
--- a/gdb/linux-tdep.c
+++ b/gdb/linux-tdep.c
@@ -33,6 +33,8 @@
#include "arch-utils.h"
#include "gdb_obstack.h"
#include "observer.h"
+#include "objfiles.h"
+#include "infcall.h"
#include <ctype.h>
@@ -1921,6 +1923,52 @@ linux_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range)
return 1;
}
+/* Symbols for linux_infcall_mmap's ARG_FLAGS; their Linux MAP_* system
+ definitions would be dependent on compilation host. */
+#define GDB_MMAP_MAP_PRIVATE 0x02 /* Changes are private. */
+#define GDB_MMAP_MAP_ANONYMOUS 0x20 /* Don't use a file. */
+
+/* See gdbarch.sh 'infcall_mmap'. */
+
+static CORE_ADDR
+linux_infcall_mmap (CORE_ADDR size, unsigned prot)
+{
+ struct objfile *objf;
+ /* Do there still exist any Linux systems without "mmap64"?
+ "mmap" uses 64-bit off_t on x86_64 and 32-bit off_t on i386 and x32. */
+ struct value *mmap_val = find_function_in_inferior ("mmap64", &objf);
+ struct value *addr_val;
+ struct gdbarch *gdbarch = get_objfile_arch (objf);
+ CORE_ADDR retval;
+ enum
+ {
+ ARG_ADDR, ARG_LENGTH, ARG_PROT, ARG_FLAGS, ARG_FD, ARG_OFFSET, ARG_MAX
+ };
+ struct value *arg[ARG_MAX];
+
+ arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr,
+ 0);
+ /* Assuming sizeof (unsigned long) == sizeof (size_t). */
+ arg[ARG_LENGTH] = value_from_ulongest
+ (builtin_type (gdbarch)->builtin_unsigned_long, size);
+ gdb_assert ((prot & ~(GDB_MMAP_PROT_READ | GDB_MMAP_PROT_WRITE
+ | GDB_MMAP_PROT_EXEC))
+ == 0);
+ arg[ARG_PROT] = value_from_longest (builtin_type (gdbarch)->builtin_int, prot);
+ arg[ARG_FLAGS] = value_from_longest (builtin_type (gdbarch)->builtin_int,
+ GDB_MMAP_MAP_PRIVATE
+ | GDB_MMAP_MAP_ANONYMOUS);
+ arg[ARG_FD] = value_from_longest (builtin_type (gdbarch)->builtin_int, -1);
+ arg[ARG_OFFSET] = value_from_longest (builtin_type (gdbarch)->builtin_int64,
+ 0);
+ addr_val = call_function_by_hand (mmap_val, ARG_MAX, arg);
+ retval = value_as_address (addr_val);
+ if (retval == (CORE_ADDR) -1)
+ error (_("Failed inferior mmap call for %s bytes, errno is changed."),
+ pulongest (size));
+ return retval;
+}
+
/* To be called from the various GDB_OSABI_LINUX handlers for the
various GNU/Linux architectures and machine types. */
@@ -1939,6 +1987,7 @@ linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
set_gdbarch_gdb_signal_to_target (gdbarch,
linux_gdb_signal_to_target);
set_gdbarch_vsyscall_range (gdbarch, linux_vsyscall_range);
+ set_gdbarch_infcall_mmap (gdbarch, linux_infcall_mmap);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
next prev parent reply other threads:[~2014-11-23 19:28 UTC|newest]
Thread overview: 93+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-23 19:27 [PATCH v4 00/14] let gdb reuse gcc's C compiler Jan Kratochvil
2014-11-23 19:27 ` [PATCH v4 03/14] add some missing ops to DWARF assembler Jan Kratochvil
2014-11-23 19:27 ` [PATCH v4 02/14] add gcc/gdb interface files Jan Kratochvil
2014-11-23 19:27 ` [PATCH v4 04/14] add make_unqualified_type Jan Kratochvil
2014-11-23 19:27 ` [PATCH v4 01/14] introduce ui_file_write_for_put Jan Kratochvil
2014-11-23 19:28 ` [PATCH v4 05/14] add dummy frame destructor Jan Kratochvil
2014-11-23 19:28 ` Jan Kratochvil [this message]
2014-12-15 12:41 ` [PATCH v4 12/14] add linux_infcall_mmap Ulrich Weigand
2014-12-15 13:49 ` Yao Qi
2014-12-15 16:48 ` Jan Kratochvil
2014-12-16 5:27 ` Yao Qi
2014-11-23 19:28 ` [PATCH v4 11/14] export dwarf2_reg_to_regnum_or_error Jan Kratochvil
2014-11-23 19:28 ` [PATCH v4 13/14] add s390_gcc_target_options Jan Kratochvil
2014-11-23 19:28 ` [PATCH v4 06/14] add infcall_mmap and gcc_target_options gdbarch methods Jan Kratochvil
2014-11-23 19:28 ` [PATCH v4 09/14] split dwarf2_fetch_cfa_info from dwarf2_compile_expr_to_ax Jan Kratochvil
2014-11-23 19:28 ` [PATCH v4 07/14] add gnu_triplet_regexp gdbarch method Jan Kratochvil
2014-11-23 19:28 ` [PATCH v4 10/14] make dwarf_expr_frame_base_1 public Jan Kratochvil
2014-11-23 19:28 ` [PATCH v4 08/14] introduce call_function_by_hand_dummy Jan Kratochvil
2014-11-23 19:29 ` [PATCH v4 14/14] the "compile" command Jan Kratochvil
2014-12-14 6:05 ` Yao Qi
2014-12-14 7:53 ` Jan Kratochvil
2014-12-14 8:54 ` Yao Qi
2014-12-14 18:24 ` [mingw rfc] Add mkdtemp to gdb/gnulib/ [Re: [PATCH v4 14/14] the "compile" command] Jan Kratochvil
2014-12-15 3:16 ` Yao Qi
2014-12-15 12:44 ` Joel Brobecker
2014-12-15 13:11 ` Kai Tietz
2014-12-15 13:24 ` Yao Qi
2014-12-15 17:12 ` Jan Kratochvil
2014-12-15 17:48 ` Eli Zaretskii
2014-12-15 18:14 ` Joel Brobecker
2014-12-15 18:21 ` Jan Kratochvil
2014-12-15 18:35 ` Joel Brobecker
2014-12-15 18:40 ` Jan Kratochvil
2014-12-15 18:57 ` Eli Zaretskii
2014-12-15 22:28 ` [patch] compile: Fix MinGW build [Re: [mingw rfc] Add mkdtemp to gdb/gnulib/] Jan Kratochvil
2014-12-15 22:56 ` Jan Kratochvil
2014-12-16 3:40 ` Eli Zaretskii
2014-12-16 9:04 ` Kai Tietz
2014-12-17 21:02 ` [patch] compile: rm -rf -> ftw()+rmdir()+unlink() [Re: [patch] compile: Fix MinGW build] Jan Kratochvil
2014-12-17 22:07 ` Steve Ellcey
2014-12-17 22:42 ` Pedro Alves
2014-12-18 18:14 ` Jan Kratochvil
2014-12-18 18:24 ` Pedro Alves
2014-12-18 18:41 ` Jan Kratochvil
2014-12-18 19:07 ` Pedro Alves
2014-12-18 21:05 ` Jan Kratochvil
2014-12-18 21:11 ` Eli Zaretskii
2014-12-18 21:24 ` Jan Kratochvil
2014-12-18 22:18 ` Sergio Durigan Junior
2014-12-18 23:06 ` Pedro Alves
2014-12-19 0:12 ` Jan Kratochvil
2014-12-19 10:48 ` Pedro Alves
2014-12-19 8:24 ` Eli Zaretskii
2014-12-19 12:59 ` Joel Brobecker
2014-12-18 20:26 ` Eli Zaretskii
2014-12-18 5:38 ` Yao Qi
2014-12-18 17:23 ` Eli Zaretskii
2014-12-18 17:31 ` Jan Kratochvil
2014-12-18 17:40 ` Eli Zaretskii
2014-12-18 20:15 ` Kai Tietz
2014-12-18 20:47 ` Eli Zaretskii
2014-12-18 20:55 ` Kai Tietz
2014-12-18 23:47 ` Pedro Alves
2014-12-19 9:28 ` Kai Tietz
2014-12-19 19:25 ` Jan Kratochvil
2014-12-19 20:55 ` Jan Kratochvil
2014-12-20 12:26 ` Joel Brobecker
2014-12-18 20:56 ` Sergio Durigan Junior
2014-12-17 17:30 ` [patch] compile: Fix MinGW build [Re: [mingw rfc] Add mkdtemp to gdb/gnulib/] Steve Ellcey
2014-12-16 3:37 ` Eli Zaretskii
2014-12-16 9:06 ` Kai Tietz
2014-12-17 19:18 ` Jan Kratochvil
2014-12-17 19:31 ` Eli Zaretskii
2014-12-17 19:37 ` Jan Kratochvil
2014-12-17 20:34 ` Pedro Alves
2014-12-18 17:22 ` Eli Zaretskii
2014-12-18 18:00 ` Pedro Alves
2014-12-16 12:40 ` Pierre Muller
2014-12-17 18:21 ` Jan Kratochvil
2014-12-17 1:22 ` Yao Qi
2014-12-17 10:57 ` Pedro Alves
2014-12-17 11:40 ` Yao Qi
2014-12-17 11:43 ` Pedro Alves
2014-12-17 11:56 ` Yao Qi
2014-12-17 19:15 ` Jan Kratochvil
2014-12-17 11:16 ` Pedro Alves
2014-12-17 18:17 ` [patchv2] " Jan Kratochvil
2014-12-17 18:33 ` Pedro Alves
2014-12-17 19:12 ` [commit] " Jan Kratochvil
2014-12-05 18:29 ` [patch 15/14] GDB/GCC compile function pointers [Re: [PATCH v4 00/14] let gdb reuse gcc's C compiler] Jan Kratochvil
2014-12-12 21:51 ` obsolete: " Jan Kratochvil
2014-12-12 14:40 ` [PATCH v4 00/14] let gdb reuse gcc's C compiler Pedro Alves
2014-12-12 21:46 ` [commit all 14 parts] " Jan Kratochvil
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