diff options
Diffstat (limited to 'gnu/usr.bin/binutils/gdb/kvm-fbsd-i386.h')
| -rw-r--r-- | gnu/usr.bin/binutils/gdb/kvm-fbsd-i386.h | 131 |
1 files changed, 131 insertions, 0 deletions
diff --git a/gnu/usr.bin/binutils/gdb/kvm-fbsd-i386.h b/gnu/usr.bin/binutils/gdb/kvm-fbsd-i386.h new file mode 100644 index 0000000..b7e4a20 --- /dev/null +++ b/gnu/usr.bin/binutils/gdb/kvm-fbsd-i386.h @@ -0,0 +1,131 @@ +/* Kernel core dump functions below target vector, for GDB on FreeBSD/i386. + Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995 + 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 2 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, write to the Free Software +Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. +*/ + +__FBSDID("$FreeBSD$"); + +#include <machine/frame.h> + +static CORE_ADDR +ksym_maxuseraddr (void) +{ + static CORE_ADDR maxuseraddr; + struct minimal_symbol *sym; + + if (maxuseraddr == 0) + { + sym = lookup_minimal_symbol ("PTmap", NULL, NULL); + if (sym == NULL) { + maxuseraddr = VM_MAXUSER_ADDRESS; + } else { + maxuseraddr = SYMBOL_VALUE_ADDRESS (sym); + } + } + return maxuseraddr; +} + + +/* Symbol names of kernel entry points. Use special frames. */ +#define KSYM_TRAP "calltrap" +#define KSYM_INTR "Xintr" +#define KSYM_FASTINTR "Xfastintr" +#define KSYM_OLDSYSCALL "Xlcall_syscall" +#define KSYM_SYSCALL "Xint0x80_syscall" + +/* The following is FreeBSD-specific hackery to decode special frames + and elide the assembly-language stub. This could be made faster by + defining a frame_type field in the machine-dependent frame information, + but we don't think that's too important right now. */ +enum frametype { tf_normal, tf_trap, tf_interrupt, tf_syscall }; + +CORE_ADDR +fbsd_kern_frame_saved_pc (struct frame_info *fi) +{ + struct minimal_symbol *sym; + CORE_ADDR this_saved_pc; + enum frametype frametype; + + this_saved_pc = read_memory_integer (fi->frame + 4, 4); + sym = lookup_minimal_symbol_by_pc (this_saved_pc); + frametype = tf_normal; + if (sym != NULL) + { + if (strcmp (SYMBOL_NAME (sym), KSYM_TRAP) == 0) + frametype = tf_trap; + else + if (strncmp (SYMBOL_NAME (sym), KSYM_INTR, + strlen (KSYM_INTR)) == 0 || strncmp (SYMBOL_NAME(sym), + KSYM_FASTINTR, strlen (KSYM_FASTINTR)) == 0) + frametype = tf_interrupt; + else + if (strcmp (SYMBOL_NAME (sym), KSYM_SYSCALL) == 0 || + strcmp (SYMBOL_NAME (sym), KSYM_OLDSYSCALL) == 0) + frametype = tf_syscall; + } + + switch (frametype) + { + case tf_normal: + return (this_saved_pc); +#define oEIP offsetof (struct trapframe, tf_eip) + + case tf_trap: + return (read_memory_integer (fi->frame + 8 + oEIP, 4)); + + case tf_interrupt: + return (read_memory_integer (fi->frame + 12 + oEIP, 4)); + + case tf_syscall: + return (read_memory_integer (fi->frame + 8 + oEIP, 4)); +#undef oEIP + } +} + +static void +fetch_kcore_registers (struct pcb *pcb) +{ + int i; + int noreg; + + /* Get the register values out of the sys pcb and store them where + `read_register' will find them. */ + /* + * XXX many registers aren't available. + * XXX for the non-core case, the registers are stale - they are for + * the last context switch to the debugger. + * XXX gcc's register numbers aren't all #defined in tm-i386.h. + */ + noreg = 0; + for (i = 0; i < 3; ++i) /* eax,ecx,edx */ + supply_register (i, (char *)&noreg); + + supply_register (3, (char *) &pcb->pcb_ebx); + supply_register (SP_REGNUM, (char *) &pcb->pcb_esp); + supply_register (FP_REGNUM, (char *) &pcb->pcb_ebp); + supply_register (6, (char *) &pcb->pcb_esi); + supply_register (7, (char *) &pcb->pcb_edi); + supply_register (PC_REGNUM, (char *) &pcb->pcb_eip); + + for (i = 9; i < 14; ++i) /* eflags, cs, ss, ds, es, fs */ + supply_register (i, (char *) &noreg); + supply_register (15, (char *) &pcb->pcb_gs); + + /* XXX 80387 registers? */ +} |
