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Dike out bits specific to i386. This pretty much means no kgdb for

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non-i386 platforms.

I would however like to see a shared file here.  If a function or two cannot
be shared we should create ${TARGET_ARCH}/kvm-fbsd-${TARGET_ARCH}.c.
This commit is contained in:
David E. O'Brien 2002-06-30 04:47:43 +00:00
parent 006f19e4f2
commit 68464ed689
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=99107
1 changed files with 34 additions and 10 deletions
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44
gnu/usr.bin/binutils/gdb/kvm-fbsd.c
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@ -52,11 +52,12 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */
#endif
#include <machine/frame.h>
#if __FreeBSD_version >= 500032 && defined(i386)
#define _KERNEL
#include <sys/pcpu.h>
#undef _KERNEL
#include <assert.h>
static void kcore_files_info PARAMS ((struct target_ops *));
static void kcore_close PARAMS ((int));
@ -113,8 +114,8 @@ static struct kinfo_proc * kvm_getprocs PARAMS ((int cfd, int op,
extern struct target_ops kcore_ops; /* Forward decl */
/* Non-zero means we are debugging a kernel core file */
int kernel_debugging = 0;
int kernel_writablecore = 0;
int kernel_debugging;
int kernel_writablecore;
static char *core_file;
static int core_kd = -1;
@ -176,7 +177,7 @@ struct frame_info *fr;
switch (frametype) {
case tf_normal:
return (this_saved_pc);
#ifdef __i386__
#define oEIP offsetof(struct trapframe, tf_eip)
case tf_trap:
@ -188,6 +189,7 @@ struct frame_info *fr;
case tf_syscall:
return (read_memory_integer (fr->frame + 8 + oEIP, 4));
#undef oEIP
#endif
}
}
@ -897,16 +899,28 @@ kvtophys (fd, addr)
current_ptd = PTD;
}
else
#ifdef __i386__
current_ptd = pcb.pcb_cr3;
#else
assert(0);
#endif
/*
* Read the first-level page table (ptd).
*/
#ifdef __i386__
v = current_ptd + ( (unsigned)addr >> PDRSHIFT) * sizeof pte;
#else
v = current_ptd + ( (unsigned)addr ) * sizeof pte;
#endif
if (physrd (fd, v, (char *)&pte, sizeof pte) < 0 || (pte&PG_V) == 0)
return (~0);
#ifdef __i386__
if (pte & PG_PS)
#else
if (pte )
#endif
{
/*
* No second-level page table; ptd describes one 4MB page.
@ -914,7 +928,11 @@ kvtophys (fd, addr)
* it cr0, and that the kernel doesn't support 36-bit physical
* addresses).
*/
#ifdef __i386__
#define PAGE4M_MASK (NBPDR - 1)
#else
#define PAGE4M_MASK 0
#endif
#define PG_FRAME4M (~PAGE4M_MASK)
addr = (pte & PG_FRAME4M) + (addr & PAGE4M_MASK);
}
@ -923,11 +941,19 @@ kvtophys (fd, addr)
/*
* Read the second-level page table.
*/
#ifdef __i386__
v = (pte&PG_FRAME) + ((addr >> PAGE_SHIFT)&(NPTEPG-1)) * sizeof pte;
#else
v = (pte ) + ((addr >> PAGE_SHIFT)&(NPTEPG-1)) * sizeof pte;
#endif
if (physrd (fd, v, (char *) &pte, sizeof (pte)) < 0 || (pte&PG_V) == 0)
return (~0);
#ifdef __i386__
addr = (pte & PG_FRAME) + (addr & PAGE_MASK);
#else
addr = (pte ) + (addr & PAGE_MASK);
#endif
}
#if 0
printf ("vtophys (%x) -> %x\n", oldaddr, addr);
@ -967,15 +993,19 @@ read_pcb (fd, uaddr)
noreg = 0;
for (i = 0; i < 3; ++i) /* eax,ecx,edx */
supply_register (i, (char *)&noreg);
#ifdef __i386__
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);
#endif
for (i = 9; i < 14; ++i) /* eflags, cs, ss, ds, es, fs */
supply_register (i, (char *)&noreg);
#ifdef __i386__
supply_register (15, (char *)&pcb.pcb_gs);
#endif
/* XXX 80387 registers? */
}
@ -1024,14 +1054,9 @@ kernel_core_file_hook (fd, addr, buf, len)
static struct target_ops kcore_ops;
#else
int kernel_debugging = 0;
#endif
void
_initialize_kcorelow()
{
#if __FreeBSD_version >= 500032 && defined(i386)
kcore_ops.to_shortname = "kcore";
kcore_ops.to_longname = "Kernel core dump file";
kcore_ops.to_doc =
@ -1053,5 +1078,4 @@ _initialize_kcorelow()
add_target (&kcore_ops);
add_com ("proc", class_obscure, set_proc_cmd, "Set current process context");
add_com ("cpu", class_obscure, set_cpu_cmd, "Set current cpu");
#endif
}