diff options
Diffstat (limited to 'gdb/linux-tdep.c')
| -rw-r--r-- | gdb/linux-tdep.c | 35 |
1 files changed, 35 insertions, 0 deletions
diff --git a/gdb/linux-tdep.c b/gdb/linux-tdep.c index 7a76670..2ffd992 100644 --- a/gdb/linux-tdep.c +++ b/gdb/linux-tdep.c @@ -1796,6 +1796,40 @@ linux_gdb_signal_to_target (struct gdbarch *gdbarch, return -1; } +/* Rummage through mappings to find a mapping's size. */ + +static int +find_mapping_size (CORE_ADDR vaddr, unsigned long size, + int read, int write, int exec, int modified, + void *data) +{ + struct mem_range *range = data; + + if (vaddr == range->start) + { + range->length = size; + return 1; + } + return 0; +} + +/* Implementation of the "vsyscall_range" gdbarch hook. */ + +static int +linux_vsyscall_range (struct gdbarch *gdbarch, struct mem_range *range) +{ + if (target_auxv_search (¤t_target, AT_SYSINFO_EHDR, &range->start) <= 0) + return 0; + + /* This is installed by linux_init_abi below, so should always be + available. */ + gdb_assert (gdbarch_find_memory_regions_p (target_gdbarch ())); + + range->length = 0; + gdbarch_find_memory_regions (gdbarch, find_mapping_size, range); + return 1; +} + /* To be called from the various GDB_OSABI_LINUX handlers for the various GNU/Linux architectures and machine types. */ @@ -1813,6 +1847,7 @@ 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_vsyscall_range (gdbarch, linux_vsyscall_range); } /* Provide a prototype to silence -Wmissing-prototypes. */ |