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Add sniffer for Cygwin x86_64 core dumps

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Similarly to existing i386_cygwin_core_osabi_sniffer()

gdb/ChangeLog:

2020-07-01  Jon Turney  <jon.turney@dronecode.org.uk>

	* amd64-windows-tdep.c (amd64_cygwin_core_osabi_sniffer): New.
	(_initialize_amd64_windows_tdep): Register amd64_cygwin_core_osabi_sniffer.
This commit is contained in:
Jon Turney
2020-06-29 16:20:13 +01:00
parent e8ef12b996
commit 7d155da3d9
2 changed files with 30 additions and 0 deletions
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25
gdb/amd64-windows-tdep.c
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@ -42,6 +42,8 @@ static int amd64_windows_dummy_call_integer_regs[] =
AMD64_R9_REGNUM /* %r9 */
};
#define AMD64_WINDOWS_SIZEOF_GREGSET 1232
/* Return nonzero if an argument of type TYPE should be passed
via one of the integer registers. */
@ -1276,6 +1278,24 @@ amd64_windows_osabi_sniffer (bfd *abfd)
return GDB_OSABI_WINDOWS;
}
static enum gdb_osabi
amd64_cygwin_core_osabi_sniffer (bfd *abfd)
{
const char *target_name = bfd_get_target (abfd);
/* Cygwin uses elf core dumps. Do not claim all ELF executables,
check whether there is a .reg section of proper size. */
if (strcmp (target_name, "elf64-x86-64") == 0)
{
asection *section = bfd_get_section_by_name (abfd, ".reg");
if (section != nullptr
&& bfd_section_size (section) == AMD64_WINDOWS_SIZEOF_GREGSET)
return GDB_OSABI_CYGWIN;
}
return GDB_OSABI_UNKNOWN;
}
void _initialize_amd64_windows_tdep ();
void
_initialize_amd64_windows_tdep ()
@ -1287,4 +1307,9 @@ _initialize_amd64_windows_tdep ()
gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_coff_flavour,
amd64_windows_osabi_sniffer);
/* Cygwin uses elf core dumps. */
gdbarch_register_osabi_sniffer (bfd_arch_i386, bfd_target_elf_flavour,
amd64_cygwin_core_osabi_sniffer);
}