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* solib-svr4.c (enable_break <target_auxv_search>): New variable
	addr_bit.  Adjust LOAD_ADDR sign for cross-arch inferiors.
This commit is contained in:
Jan Kratochvil 2010-02-17 11:37:23 +00:00
parent 792cdb5065
commit ad3a0e5b17
2 changed files with 31 additions and 1 deletions
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5
gdb/ChangeLog
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@ -1,3 +1,8 @@
2010-02-17 Jan Kratochvil <jan.kratochvil@redhat.com>
* solib-svr4.c (enable_break <target_auxv_search>): New variable
addr_bit. Adjust LOAD_ADDR sign for cross-arch inferiors.
2010-02-17 Tristan Gingold <gingold@adacore.com>
Petr Hluzín <petr.hluzin@gmail.com>

27
gdb/solib-svr4.c
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@ -1451,7 +1451,32 @@ enable_break (struct svr4_info *info, int from_tty)
from our so_list, then try using the AT_BASE auxilliary entry. */
if (!load_addr_found)
if (target_auxv_search (&current_target, AT_BASE, &load_addr) > 0)
load_addr_found = 1;
{
int addr_bit = gdbarch_addr_bit (target_gdbarch);
/* Ensure LOAD_ADDR has proper sign in its possible upper bits so
that `+ load_addr' will overflow CORE_ADDR width not creating
invalid addresses like 0x101234567 for 32bit inferiors on 64bit
GDB. */
if (addr_bit < (sizeof (ULONGEST) * HOST_CHAR_BIT))
{
CORE_ADDR space_size = (ULONGEST) 1 << addr_bit;
CORE_ADDR tmp_entry_point = exec_entry_point (tmp_bfd,
tmp_bfd_target);
gdb_assert (load_addr < space_size);
/* TMP_ENTRY_POINT exceeding SPACE_SIZE would be for prelinked
64bit ld.so with 32bit executable, it should not happen. */
if (tmp_entry_point < space_size
&& tmp_entry_point + load_addr >= space_size)
load_addr -= space_size;
}
load_addr_found = 1;
}
/* Otherwise we find the dynamic linker's base address by examining
the current pc (which should point at the entry point for the