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add linux_infcall_mmap
This implements the new gdbarch "infcall_mmap" method for Linux. gdb/ChangeLog 2014-12-12 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.
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@ -1,3 +1,10 @@
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2014-12-12 Jan Kratochvil <jan.kratochvil@redhat.com>
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* linux-tdep.c: Include objfiles.h and infcall.h.
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(GDB_MMAP_MAP_PRIVATE, GDB_MMAP_MAP_ANONYMOUS, linux_infcall_mmap): New
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function.
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(linux_init_abi): Add linux_infcall_mmap to gdbarch.
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2014-12-12 Jan Kratochvil <jan.kratochvil@redhat.com>
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2014-12-12 Jan Kratochvil <jan.kratochvil@redhat.com>
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* dwarf2loc.h (dwarf2_reg_to_regnum_or_error): Declare.
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* dwarf2loc.h (dwarf2_reg_to_regnum_or_error): Declare.
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@ -33,6 +33,8 @@
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#include "arch-utils.h"
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#include "arch-utils.h"
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#include "gdb_obstack.h"
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#include "gdb_obstack.h"
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#include "observer.h"
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#include "observer.h"
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#include "objfiles.h"
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#include "infcall.h"
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#include <ctype.h>
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#include <ctype.h>
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@ -1921,6 +1923,52 @@ linux_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range)
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return 1;
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return 1;
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}
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}
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/* Symbols for linux_infcall_mmap's ARG_FLAGS; their Linux MAP_* system
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definitions would be dependent on compilation host. */
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#define GDB_MMAP_MAP_PRIVATE 0x02 /* Changes are private. */
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#define GDB_MMAP_MAP_ANONYMOUS 0x20 /* Don't use a file. */
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/* See gdbarch.sh 'infcall_mmap'. */
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static CORE_ADDR
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linux_infcall_mmap (CORE_ADDR size, unsigned prot)
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{
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struct objfile *objf;
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/* Do there still exist any Linux systems without "mmap64"?
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"mmap" uses 64-bit off_t on x86_64 and 32-bit off_t on i386 and x32. */
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struct value *mmap_val = find_function_in_inferior ("mmap64", &objf);
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struct value *addr_val;
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struct gdbarch *gdbarch = get_objfile_arch (objf);
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CORE_ADDR retval;
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enum
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{
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ARG_ADDR, ARG_LENGTH, ARG_PROT, ARG_FLAGS, ARG_FD, ARG_OFFSET, ARG_MAX
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};
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struct value *arg[ARG_MAX];
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arg[ARG_ADDR] = value_from_pointer (builtin_type (gdbarch)->builtin_data_ptr,
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0);
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/* Assuming sizeof (unsigned long) == sizeof (size_t). */
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arg[ARG_LENGTH] = value_from_ulongest
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(builtin_type (gdbarch)->builtin_unsigned_long, size);
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gdb_assert ((prot & ~(GDB_MMAP_PROT_READ | GDB_MMAP_PROT_WRITE
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| GDB_MMAP_PROT_EXEC))
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== 0);
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arg[ARG_PROT] = value_from_longest (builtin_type (gdbarch)->builtin_int, prot);
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arg[ARG_FLAGS] = value_from_longest (builtin_type (gdbarch)->builtin_int,
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GDB_MMAP_MAP_PRIVATE
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| GDB_MMAP_MAP_ANONYMOUS);
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arg[ARG_FD] = value_from_longest (builtin_type (gdbarch)->builtin_int, -1);
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arg[ARG_OFFSET] = value_from_longest (builtin_type (gdbarch)->builtin_int64,
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0);
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addr_val = call_function_by_hand (mmap_val, ARG_MAX, arg);
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retval = value_as_address (addr_val);
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if (retval == (CORE_ADDR) -1)
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error (_("Failed inferior mmap call for %s bytes, errno is changed."),
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pulongest (size));
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return retval;
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}
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/* To be called from the various GDB_OSABI_LINUX handlers for the
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/* To be called from the various GDB_OSABI_LINUX handlers for the
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various GNU/Linux architectures and machine types. */
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various GNU/Linux architectures and machine types. */
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@ -1939,6 +1987,7 @@ linux_init_abi (struct gdbarch_info info, struct gdbarch *gdbarch)
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set_gdbarch_gdb_signal_to_target (gdbarch,
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set_gdbarch_gdb_signal_to_target (gdbarch,
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linux_gdb_signal_to_target);
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linux_gdb_signal_to_target);
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set_gdbarch_vsyscall_range (gdbarch, linux_vsyscall_range);
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set_gdbarch_vsyscall_range (gdbarch, linux_vsyscall_range);
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set_gdbarch_infcall_mmap (gdbarch, linux_infcall_mmap);
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}
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}
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/* Provide a prototype to silence -Wmissing-prototypes. */
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/* Provide a prototype to silence -Wmissing-prototypes. */
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