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/* Kernel core dump functions below target vector, for GDB on FreeBSD/AMD64. |
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Copyright 1986, 1987, 1989, 1991, 1992, 1993, 1994, 1995 |
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Free Software Foundation, Inc. |
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|
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This file is part of GDB. |
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|
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This program is free software; you can redistribute it and/or modify |
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it under the terms of the GNU General Public License as published by |
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the Free Software Foundation; either version 2 of the License, or |
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(at your option) any later version. |
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|
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This program is distributed in the hope that it will be useful, |
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but WITHOUT ANY WARRANTY; without even the implied warranty of |
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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GNU General Public License for more details. |
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|
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You should have received a copy of the GNU General Public License |
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along with this program; if not, write to the Free Software |
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Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. |
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*/ |
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|
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__FBSDID("$FreeBSD: ports/devel/gdb6/files/kvm-fbsd-amd64.h,v 1.2 2004/08/23 06:34:48 obrien Exp $"); |
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|
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#include "amd64-tdep.h" |
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|
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static CORE_ADDR |
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ksym_maxuseraddr (void) |
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{ |
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static CORE_ADDR maxuseraddr; |
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struct minimal_symbol *sym; |
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|
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if (maxuseraddr == 0) |
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{ |
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sym = lookup_minimal_symbol ("PTmap", NULL, NULL); |
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if (sym == NULL) { |
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maxuseraddr = VM_MAXUSER_ADDRESS; |
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} else { |
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maxuseraddr = SYMBOL_VALUE_ADDRESS (sym); |
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} |
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} |
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return maxuseraddr; |
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} |
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|
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|
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/* Symbol names of kernel entry points. Use special frames. */ |
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#define KSYM_TRAP "calltrap" |
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#define KSYM_INTR "Xintr" |
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#define KSYM_FASTINTR "Xfastintr" |
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#define KSYM_OLDSYSCALL "Xlcall_syscall" |
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#define KSYM_SYSCALL "Xint0x80_syscall" |
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|
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/* The following is FreeBSD-specific hackery to decode special frames |
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and elide the assembly-language stub. This could be made faster by |
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defining a frame_type field in the machine-dependent frame information, |
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but we don't think that's too important right now. */ |
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enum frametype { tf_normal, tf_trap, tf_interrupt, tf_syscall }; |
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|
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#if __FreeBSD_version >= 500032 |
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CORE_ADDR |
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fbsd_kern_frame_saved_pc (struct frame_info *fi) |
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{ |
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struct minimal_symbol *sym; |
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CORE_ADDR this_saved_pc; |
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enum frametype frametype; |
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|
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this_saved_pc = read_memory_integer (get_frame_base (fi) + 4, 4); |
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sym = lookup_minimal_symbol_by_pc (this_saved_pc); |
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frametype = tf_normal; |
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if (sym != NULL) |
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{ |
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if (strcmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_TRAP) == 0) |
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frametype = tf_trap; |
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else |
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if (strncmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_INTR, |
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strlen (KSYM_INTR)) == 0 || strncmp (DEPRECATED_SYMBOL_NAME(sym), |
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KSYM_FASTINTR, strlen (KSYM_FASTINTR)) == 0) |
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frametype = tf_interrupt; |
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else |
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if (strcmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_SYSCALL) == 0 || |
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strcmp (DEPRECATED_SYMBOL_NAME (sym), KSYM_OLDSYSCALL) == 0) |
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frametype = tf_syscall; |
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} |
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|
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switch (frametype) |
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{ |
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default: |
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case tf_normal: |
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return (this_saved_pc); |
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#define oEIP offsetof (struct trapframe, tf_rip) |
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|
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case tf_trap: |
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return (read_memory_integer (get_frame_base (fi) + 8 + oEIP, 4)); |
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|
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case tf_interrupt: |
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return (read_memory_integer (get_frame_base (fi) + 12 + oEIP, 4)); |
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|
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case tf_syscall: |
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return (read_memory_integer (get_frame_base (fi) + 8 + oEIP, 4)); |
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#undef oEIP |
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} |
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} |
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#endif |
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|
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static void |
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fetch_kcore_registers (struct pcb *pcb) |
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{ |
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int i; |
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int noreg; |
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|
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/* Get the register values out of the sys pcb and store them where |
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`read_register' will find them. */ |
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/* |
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* XXX many registers aren't available. |
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* XXX for the non-core case, the registers are stale - they are for |
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* the last context switch to the debugger. |
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* XXX gcc's register numbers aren't all #defined in tm-amd64.h. |
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*/ |
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noreg = 0; |
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for (i = 0; i < 3; ++i) /* eax,ecx,edx */ |
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regcache_raw_supply (current_regcache, i, (char *)&noreg); |
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|
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/* DEO:XXX use SP_REGNUM and PC_REGNUM -- this is GDB_MULTI_ARCH */ |
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regcache_raw_supply (current_regcache, 3, (char *) &pcb->pcb_rbx); |
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regcache_raw_supply (current_regcache, SP_REGNUM, (char *) &pcb->pcb_rsp); |
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regcache_raw_supply (current_regcache, AMD64_RBP_REGNUM, (char *) &pcb->pcb_rbp); |
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regcache_raw_supply (current_regcache, PC_REGNUM, (char *) &pcb->pcb_rip); |
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|
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for (i = 9; i < 14; ++i) /* rflags, cs, ss, ds, es, fs */ |
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regcache_raw_supply (current_regcache, i, (char *) &noreg); |
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regcache_raw_supply (current_regcache, 15, (char *) &pcb->pcb_gs); |
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|
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/* XXX 80387 registers? */ |
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} |
