From: Tom Tromey <tromey@redhat.com>
To: gdb-patches@sourceware.org
Cc: Jan Kratochvil <jan.kratochvil@redhat.com>
Subject: [PATCH 12/14] add linux_infcall_mmap
Date: Fri, 16 May 2014 15:43:00 -0000 [thread overview]
Message-ID: <1400253995-12333-13-git-send-email-tromey@redhat.com> (raw)
In-Reply-To: <1400253995-12333-1-git-send-email-tromey@redhat.com>
From: Jan Kratochvil <jan.kratochvil@redhat.com>
This implements the new gdbarch "infcall_mmap" method for Linux.
2014-05-16 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/linux-tdep.c b/gdb/linux-tdep.c
index c10b8ee..28f8331 100644
--- a/gdb/linux-tdep.c
+++ b/gdb/linux-tdep.c
@@ -32,6 +32,9 @@
#include "cli/cli-utils.h"
#include "arch-utils.h"
#include "gdb_obstack.h"
+#include "objfiles.h"
+#include "infcall.h"
+#include <sys/mman.h>
#include <ctype.h>
@@ -1766,6 +1769,48 @@ linux_gdb_signal_to_target (struct gdbarch *gdbarch,
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. */
@@ -1783,6 +1828,7 @@ linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
linux_gdb_signal_from_target);
set_gdbarch_gdb_signal_to_target (gdbarch,
linux_gdb_signal_to_target);
+ set_gdbarch_infcall_mmap (gdbarch, linux_infcall_mmap);
}
/* Provide a prototype to silence -Wmissing-prototypes. */
--
1.9.0
next prev parent reply other threads:[~2014-05-16 15:43 UTC|newest]
Thread overview: 35+ messages / expand[flat|nested] mbox.gz Atom feed top
2014-05-16 15:26 [PATCH 00/14] let gdb reuse gcc's C compiler Tom Tromey
2014-05-16 15:26 ` [PATCH 02/14] add gcc/gdb interface files Tom Tromey
2014-05-19 8:06 ` Yao Qi
2014-05-19 13:53 ` Tom Tromey
2014-05-16 15:26 ` [PATCH 01/14] introduce ui_file_write_for_put Tom Tromey
2014-05-16 15:26 ` [PATCH 08/14] introduce call_function_by_hand_dummy Tom Tromey
2014-05-16 15:26 ` [PATCH 07/14] add infcall_mmap and gcc_target_options gdbarch methods Tom Tromey
2014-05-19 6:13 ` Yao Qi
2014-05-19 6:41 ` Jan Kratochvil
2014-05-19 6:47 ` Jan Kratochvil
2014-05-19 7:42 ` Yao Qi
2014-05-19 8:26 ` Agovic, Sanimir
2014-05-19 11:15 ` Jan Kratochvil
2014-05-16 15:26 ` [PATCH 10/14] make dwarf_expr_frame_base_1 public Tom Tromey
2014-05-16 15:26 ` [PATCH 03/14] add some missing ops to DWARF assembler Tom Tromey
2014-05-16 15:27 ` [PATCH 14/14] the "compile" command Tom Tromey
2014-06-16 9:55 ` (Doc ping [for news and manual]) -- " Phil Muldoon
2014-06-16 15:25 ` Eli Zaretskii
2014-06-20 9:17 ` Phil Muldoon
2014-06-20 9:42 ` Eli Zaretskii
2014-06-20 10:01 ` Phil Muldoon
2014-06-20 12:37 ` Eli Zaretskii
2014-06-20 14:42 ` Tom Tromey
2014-06-20 19:00 ` Eli Zaretskii
2014-06-21 7:32 ` Eli Zaretskii
2014-05-16 15:41 ` [PATCH 05/14] change how the CLI handles comments Tom Tromey
2014-05-18 23:26 ` Doug Evans
2014-05-19 14:07 ` Phil Muldoon
2014-06-03 7:04 ` Doug Evans
2014-05-16 15:43 ` [PATCH 09/14] split dwarf2_fetch_cfa_info from dwarf2_compile_expr_to_ax Tom Tromey
2014-05-16 15:43 ` [PATCH 13/14] add s390_gcc_target_options Tom Tromey
2014-05-16 15:43 ` Tom Tromey [this message]
2014-05-16 15:56 ` [PATCH 04/14] add make_unqualified_type Tom Tromey
2014-05-16 16:18 ` [PATCH 06/14] add dummy frame destructor Tom Tromey
2014-05-16 16:18 ` [PATCH 11/14] export dwarf2_reg_to_regnum_or_error Tom Tromey
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