From: Jan Kratochvil <jan.kratochvil@redhat.com>
To: gdb-patches@sourceware.org
Subject: [PATCH v3 12/14] add linux_infcall_mmap
Date: Sat, 01 Nov 2014 21:47:00 -0000 [thread overview]
Message-ID: <20141101214719.13230.96367.stgit@host1.jankratochvil.net> (raw)
In-Reply-To: <20141101214552.13230.45564.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 (linux_infcall_mmap): New function.
(linux_init_abi): Add it to gdbarch.
---
gdb/ChangeLog | 5 +++++
gdb/linux-tdep.c | 46 ++++++++++++++++++++++++++++++++++++++++++++++
2 files changed, 51 insertions(+)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index 329e42b..52b048e 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,5 +1,10 @@
2014-10-07 Jan Kratochvil <jan.kratochvil@redhat.com>
+ * linux-tdep.c (linux_infcall_mmap): New function.
+ (linux_init_abi): Add it 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..e93ba61 100644
--- a/gdb/linux-tdep.c
+++ b/gdb/linux-tdep.c
@@ -33,6 +33,9 @@
#include "arch-utils.h"
#include "gdb_obstack.h"
#include "observer.h"
+#include "objfiles.h"
+#include "infcall.h"
+#include <sys/mman.h>
#include <ctype.h>
@@ -1921,6 +1924,48 @@ linux_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range)
return 1;
}
+/* 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 & ~7) == 0);
+ arg[ARG_PROT] = value_from_longest (builtin_type (gdbarch)->builtin_int,
+ 0
+ | ((prot & 4) != 0 ? PROT_READ : 0)
+ | ((prot & 2) != 0 ? PROT_WRITE : 0)
+ | ((prot & 1) != 0 ? PROT_EXEC : 0));
+ arg[ARG_FLAGS] = value_from_longest (builtin_type (gdbarch)->builtin_int,
+ MAP_PRIVATE | 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 +1984,7 @@ 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:[~2014-11-01 21:47 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-11-01 21:45 [PATCH v3 00/14] let gdb reuse gcc's C compiler Jan Kratochvil
2014-11-01 21:46 ` [PATCH v3 01/14] introduce ui_file_write_for_put Jan Kratochvil
2014-11-01 21:46 ` [PATCH v3 08/14] introduce call_function_by_hand_dummy Jan Kratochvil
2014-11-01 21:46 ` [PATCH v3 04/14] add make_unqualified_type Jan Kratochvil
2014-11-01 21:46 ` [PATCH v3 03/14] add some missing ops to DWARF assembler Jan Kratochvil
2014-11-01 21:46 ` [PATCH v3 06/14] add infcall_mmap and gcc_target_options gdbarch methods Jan Kratochvil
2014-11-01 21:46 ` [PATCH v3 07/14] add gnu_triplet_regexp gdbarch method Jan Kratochvil
2014-11-01 21:46 ` [PATCH v3 02/14] add gcc/gdb interface files Jan Kratochvil
2014-11-03 12:51 ` Yao Qi
2014-11-03 12:56 ` Jan Kratochvil
2014-11-03 13:24 ` Yao Qi
2014-11-01 21:46 ` [PATCH v3 05/14] add dummy frame destructor Jan Kratochvil
2014-11-01 21:47 ` [PATCH v3 09/14] split dwarf2_fetch_cfa_info from dwarf2_compile_expr_to_ax Jan Kratochvil
2014-11-01 21:47 ` [PATCH v3 11/14] export dwarf2_reg_to_regnum_or_error Jan Kratochvil
2014-11-01 21:47 ` [PATCH v3 13/14] add s390_gcc_target_options Jan Kratochvil
2014-11-01 21:47 ` Jan Kratochvil [this message]
2014-11-11 16:43 ` [PATCH v3 12/14] add linux_infcall_mmap Pedro Alves
2014-11-23 19:11 ` Jan Kratochvil
2014-12-12 14:38 ` Pedro Alves
2014-11-01 21:47 ` [PATCH v3 10/14] make dwarf_expr_frame_base_1 public Jan Kratochvil
2014-11-01 21:48 ` [PATCH v3 14/14] the "compile" command Jan Kratochvil
2014-11-02 16:03 ` Eli Zaretskii
2014-11-20 21:24 ` Jan Kratochvil
2014-11-21 7:58 ` Eli Zaretskii
2014-11-21 18:41 ` Jan Kratochvil
2014-11-21 19:47 ` Eli Zaretskii
2014-11-03 13:08 ` Yao Qi
2014-11-14 18:43 ` Jan Kratochvil
2014-11-11 18:53 ` Pedro Alves
2014-11-23 18:36 ` Jan Kratochvil
2014-12-12 14:38 ` Pedro Alves
2014-11-01 21:52 ` [PATCH v3 00/14] let gdb reuse gcc's C compiler Jan Kratochvil
2014-11-01 21:56 ` Jan Kratochvil
2014-11-03 12:47 ` Yao Qi
2014-11-03 12:49 ` Jan Kratochvil
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