diff options
Diffstat (limited to 'gdb/i386obsd-nat.c')
| -rw-r--r-- | gdb/i386obsd-nat.c | 129 |
1 files changed, 0 insertions, 129 deletions
diff --git a/gdb/i386obsd-nat.c b/gdb/i386obsd-nat.c deleted file mode 100644 index eeeee9a..0000000 --- a/gdb/i386obsd-nat.c +++ /dev/null @@ -1,129 +0,0 @@ -/* Native-dependent code for OpenBSD/i386. - - Copyright (C) 2002-2016 Free Software Foundation, Inc. - - This file is part of GDB. - - This program is free software; you can redistribute it and/or modify - it under the terms of the GNU General Public License as published by - the Free Software Foundation; either version 3 of the License, or - (at your option) any later version. - - This program is distributed in the hope that it will be useful, - but WITHOUT ANY WARRANTY; without even the implied warranty of - MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the - GNU General Public License for more details. - - You should have received a copy of the GNU General Public License - along with this program. If not, see <http://www.gnu.org/licenses/>. */ - -#include "defs.h" -#include "gdbcore.h" -#include "regcache.h" -#include "target.h" - -#include <sys/sysctl.h> -#include <machine/frame.h> -#include <machine/pcb.h> - -#include "i386-tdep.h" -#include "i386bsd-nat.h" -#include "obsd-nat.h" -#include "bsd-kvm.h" - -static int -i386obsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) -{ - struct gdbarch *gdbarch = get_regcache_arch (regcache); - enum bfd_endian byte_order = gdbarch_byte_order (gdbarch); - struct switchframe sf; - - /* The following is true for OpenBSD 3.6: - - The pcb contains %esp and %ebp at the point of the context switch - in cpu_switch(). At that point we have a stack frame as - described by `struct switchframe', which for OpenBSD 3.6 has the - following layout: - - interrupt level - %edi - %esi - %ebx - %eip - - we reconstruct the register state as it would look when we just - returned from cpu_switch(). */ - - /* The stack pointer shouldn't be zero. */ - if (pcb->pcb_esp == 0) - return 0; - - /* Read the stack frame, and check its validity. We do this by - checking if the saved interrupt priority level in the stack frame - looks reasonable.. */ -#ifdef PCB_SAVECTX - if ((pcb->pcb_flags & PCB_SAVECTX) == 0) - { - /* Yes, we have a frame that matches cpu_switch(). */ - read_memory (pcb->pcb_esp, (gdb_byte *) &sf, sizeof sf); - pcb->pcb_esp += sizeof (struct switchframe); - regcache_raw_supply (regcache, I386_EDI_REGNUM, &sf.sf_edi); - regcache_raw_supply (regcache, I386_ESI_REGNUM, &sf.sf_esi); - regcache_raw_supply (regcache, I386_EBX_REGNUM, &sf.sf_ebx); - regcache_raw_supply (regcache, I386_EIP_REGNUM, &sf.sf_eip); - } - else -#endif - { - /* No, the pcb must have been last updated by savectx(). */ - pcb->pcb_esp = pcb->pcb_ebp; - pcb->pcb_ebp = read_memory_integer(pcb->pcb_esp, 4, byte_order); - sf.sf_eip = read_memory_integer(pcb->pcb_esp + 4, 4, byte_order); - regcache_raw_supply (regcache, I386_EIP_REGNUM, &sf.sf_eip); - } - - regcache_raw_supply (regcache, I386_EBP_REGNUM, &pcb->pcb_ebp); - regcache_raw_supply (regcache, I386_ESP_REGNUM, &pcb->pcb_esp); - - return 1; -} - - -/* Prevent warning from -Wmissing-prototypes. */ -void _initialize_i386obsd_nat (void); - -void -_initialize_i386obsd_nat (void) -{ - /* Add some extra features to the common *BSD/i386 target. */ - obsd_add_target (i386bsd_target ()); - - /* Support debugging kernel virtual memory images. */ - bsd_kvm_add_target (i386obsd_supply_pcb); - - /* OpenBSD provides a vm.psstrings sysctl that we can use to locate - the sigtramp. That way we can still recognize a sigtramp if its - location is changed in a new kernel. This is especially - important for OpenBSD, since it uses a different memory layout - than NetBSD, yet we cannot distinguish between the two. - - Of course this is still based on the assumption that the sigtramp - is placed directly under the location where the program arguments - and environment can be found. */ -#ifdef VM_PSSTRINGS - { - struct _ps_strings _ps; - int mib[2]; - size_t len; - - mib[0] = CTL_VM; - mib[1] = VM_PSSTRINGS; - len = sizeof (_ps); - if (sysctl (mib, 2, &_ps, &len, NULL, 0) == 0) - { - i386obsd_sigtramp_start_addr = (u_long) _ps.val - 128; - i386obsd_sigtramp_end_addr = (u_long) _ps.val; - } - } -#endif -} |