From 0ae4f2cb51381d17b66283a479974ea953c94d99 Mon Sep 17 00:00:00 2001 From: Mark Kettenis Date: Fri, 24 Jun 2005 21:11:39 +0000 Subject: * ppcobsd-nat.c: Include "gdbcore.h", , , and "bsd-kvm.h". (ppcobsd_supply_pcb): New function. (_initialize_ppcobsd_nat): Enable libkvm interface. * Makefile.in (ppcobsd-nat.o): Update dependencies. --- gdb/ppcobsd-nat.c | 45 +++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 45 insertions(+) (limited to 'gdb/ppcobsd-nat.c') diff --git a/gdb/ppcobsd-nat.c b/gdb/ppcobsd-nat.c index 0a4aaf3..c0088c7 100644 --- a/gdb/ppcobsd-nat.c +++ b/gdb/ppcobsd-nat.c @@ -20,17 +20,22 @@ Boston, MA 02111-1307, USA. */ #include "defs.h" +#include "gdbcore.h" #include "inferior.h" #include "regcache.h" #include #include #include +#include +#include +#include #include #include "ppc-tdep.h" #include "ppcobsd-tdep.h" #include "inf-ptrace.h" +#include "bsd-kvm.h" /* OpenBSD/powerpc doesn't have PT_GETFPREGS/PT_SETFPREGS like NetBSD/powerpc and FreeBSD/powerpc. */ @@ -72,6 +77,43 @@ ppcobsd_store_registers (int regnum) } +static int +ppcobsd_supply_pcb (struct regcache *regcache, struct pcb *pcb) +{ + struct gdbarch_tdep *tdep = gdbarch_tdep (get_regcache_arch (regcache)); + struct switchframe sf; + struct callframe cf; + int i, regnum; + + /* The following is true for OpenBSD 3.7: + + The pcb contains %r1 (the stack pointer) at the point of the + context switch in cpu_switch(). At that point we have a stack + frame as described by `struct switchframe', and below that a call + frame as described by `struct callframe'. From this information + we reconstruct the register state as it would look when we are in + cpu_switch(). */ + + /* The stack pointer shouldn't be zero. */ + if (pcb->pcb_sp == 0) + return 0; + + read_memory (pcb->pcb_sp, (gdb_byte *)&sf, sizeof sf); + regcache_raw_supply (regcache, SP_REGNUM, &sf.sp); + regcache_raw_supply (regcache, tdep->ppc_cr_regnum, &sf.cr); + regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 2, &sf.fixreg2); + for (i = 0, regnum = tdep->ppc_gp0_regnum + 13; i < 19; i++, regnum++) + regcache_raw_supply (regcache, regnum, &sf.fixreg[i]); + + read_memory (sf.sp, (gdb_byte *)&cf, sizeof cf); + regcache_raw_supply (regcache, PC_REGNUM, &cf.lr); + regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 30, &cf.r30); + regcache_raw_supply (regcache, tdep->ppc_gp0_regnum + 31, &cf.r31); + + return 1; +} + + /* Provide a prototype to silence -Wmissing-prototypes. */ void _initialize_ppcobsd_nat (void); @@ -104,4 +146,7 @@ _initialize_ppcobsd_nat (void) ppcobsd_reg_offsets.vr0_offset = offsetof (struct vreg, vreg); ppcobsd_reg_offsets.vscr_offset = offsetof (struct vreg, vscr); ppcobsd_reg_offsets.vrsave_offset = offsetof (struct vreg, vrsave); + + /* Support debugging kernel virtual memory images. */ + bsd_kvm_add_target (ppcobsd_supply_pcb); } -- cgit v1.1