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Code Issues Releases Activity

Add cross debug support to arm.

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Submitted by: cognet@
This commit is contained in:
Warner Losh 2006-09-14 07:51:52 +00:00
parent 4c808aa2bb
commit 280075717e
Notes: svn2git 2020-12-20 02:59:44 +00:00 
svn path=/head/; revision=162303
1 changed files with 37 additions and 1 deletions
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38
gnu/usr.bin/gdb/kgdb/trgt_arm.c
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@ -28,8 +28,11 @@
__FBSDID("$FreeBSD$");
#include <sys/types.h>
#ifndef CROSS_DEBUGGER
#include <machine/pcb.h>
#include <machine/frame.h>
#include <machine/armreg.h>
#endif
#include <err.h>
#include <kvm.h>
#include <string.h>
@ -47,6 +50,7 @@ __FBSDID("$FreeBSD$");
void
kgdb_trgt_fetch_registers(int regno __unused)
{
#ifndef CROSS_DEBUGGER
struct kthr *kt;
struct pcb pcb;
int i, reg;
@ -76,6 +80,7 @@ kgdb_trgt_fetch_registers(int regno __unused)
else
supply_register(ARM_PC_REGNUM, (char *)&reg);
}
#endif
}
void
@ -84,6 +89,7 @@ kgdb_trgt_store_registers(int regno __unused)
fprintf_unfiltered(gdb_stderr, "XXX: %s\n", __func__);
}
#ifndef CROSS_DEBUGGER
struct kgdb_frame_cache {
CORE_ADDR fp;
CORE_ADDR sp;
@ -130,6 +136,8 @@ kgdb_trgt_frame_cache(struct frame_info *next_frame, void **this_cache)
return (cache);
}
static int is_undef;
static void
kgdb_trgt_trapframe_this_id(struct frame_info *next_frame, void **this_cache,
struct frame_id *this_id)
@ -148,6 +156,7 @@ kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame,
char dummy_valuep[MAX_REGISTER_SIZE];
struct kgdb_frame_cache *cache;
int ofs, regsz;
int is_undefined = 0;
regsz = register_size(current_gdbarch, regnum);
@ -165,9 +174,24 @@ kgdb_trgt_trapframe_prev_register(struct frame_info *next_frame,
return;
cache = kgdb_trgt_frame_cache(next_frame, this_cache);
if (is_undef && (regnum == ARM_SP_REGNUM || regnum == ARM_PC_REGNUM)) {
*addrp = cache->sp + offsetof(struct trapframe, tf_spsr);
target_read_memory(*addrp, valuep, regsz);
is_undefined = 1;
ofs = kgdb_trgt_frame_offset[ARM_SP_REGNUM];
}
*addrp = cache->sp + ofs;
*lvalp = lval_memory;
target_read_memory(*addrp, valuep, regsz);
if (is_undefined) {
*addrp = *(unsigned int *)valuep + (regnum == ARM_SP_REGNUM ?
0 : 8);
target_read_memory(*addrp, valuep, regsz);
}
}
static const struct frame_unwind kgdb_trgt_trapframe_unwind = {
@ -175,22 +199,34 @@ static const struct frame_unwind kgdb_trgt_trapframe_unwind = {
&kgdb_trgt_trapframe_this_id,
&kgdb_trgt_trapframe_prev_register
};
#endif
const struct frame_unwind *
kgdb_trgt_trapframe_sniffer(struct frame_info *next_frame)
{
#ifndef CROSS_DEBUGGER
char *pname;
CORE_ADDR pc;
pc = frame_pc_unwind(next_frame);
pname = NULL;
find_pc_partial_function(pc, &pname, NULL, NULL);
if (pname == NULL)
if (pname == NULL) {
is_undef = 0;
return (NULL);
}
if (!strcmp(pname, "undefinedinstruction"))
is_undef = 1;
if (strcmp(pname, "Laddress_exception_entry") == 0 ||
strcmp(pname, "undefined_entry") == 0 ||
strcmp(pname, "exception_exit") == 0 ||
strcmp(pname, "Laddress_exception_msg") == 0 ||
strcmp(pname, "irq_entry") == 0)
return (&kgdb_trgt_trapframe_unwind);
if (!strcmp(pname, "undefinedinstruction"))
is_undef = 1;
else
is_undef = 0;
#endif
return (NULL);
}