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sh: Generic kgdb stub support.

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This migrates from the old bitrotted kgdb stub implementation and moves
to the generic stub. In the process support for SH-2/SH-2A is also added,
which the old stub never provided.

Signed-off-by: Paul Mundt <lethal@linux-sh.org>
This commit is contained in:
Paul Mundt
2008-12-11 18:46:46 +09:00
parent d7b01f78a3
commit ab6e570ba3
15 changed files with 330 additions and 1246 deletions
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70
arch/sh/include/asm/kgdb.h
View File

@ -1,21 +1,7 @@
/*
* May be copied or modified under the terms of the GNU General Public
* License. See linux/COPYING for more information.
*
* Based on original code by Glenn Engel, Jim Kingdon,
* David Grothe <dave@gcom.com>, Tigran Aivazian, <tigran@sco.com> and
* Amit S. Kale <akale@veritas.com>
*
* Super-H port based on sh-stub.c (Ben Lee and Steve Chamberlain) by
* Henry Bell <henry.bell@st.com>
*
* Header file for low-level support for remote debug using GDB.
*
*/
#ifndef __KGDB_H
#define __KGDB_H
#ifndef __ASM_SH_KGDB_H
#define __ASM_SH_KGDB_H
#include <asm/cacheflush.h>
#include <asm/ptrace.h>
/* Same as pt_regs but has vbr in place of syscall_nr */
@ -30,40 +16,26 @@ struct kgdb_regs {
unsigned long vbr;
};
enum regnames {
GDB_R0, GDB_R1, GDB_R2, GDB_R3, GDB_R4, GDB_R5, GDB_R6, GDB_R7,
GDB_R8, GDB_R9, GDB_R10, GDB_R11, GDB_R12, GDB_R13, GDB_R14, GDB_R15,
GDB_PC, GDB_PR, GDB_SR, GDB_GBR, GDB_MACH, GDB_MACL, GDB_VBR,
};
#define NUMREGBYTES ((GDB_VBR + 1) * 4)
static inline void arch_kgdb_breakpoint(void)
{
__asm__ __volatile__ ("trapa #0x3c\n");
}
/* State info */
extern char kgdb_in_gdb_mode;
extern int kgdb_nofault; /* Ignore bus errors (in gdb mem access) */
extern char in_nmi; /* Debounce flag to prevent NMI reentry*/
/* SCI */
extern int kgdb_portnum;
extern int kgdb_baud;
extern char kgdb_parity;
extern char kgdb_bits;
#define BUFMAX 2048
/* Init and interface stuff */
extern int kgdb_init(void);
extern int (*kgdb_getchar)(void);
extern void (*kgdb_putchar)(int);
#define CACHE_FLUSH_IS_SAFE 1
#define BREAK_INSTR_SIZE 2
/* Trap functions */
typedef void (kgdb_debug_hook_t)(struct pt_regs *regs);
typedef void (kgdb_bus_error_hook_t)(void);
extern kgdb_debug_hook_t *kgdb_debug_hook;
extern kgdb_bus_error_hook_t *kgdb_bus_err_hook;
/* Console */
struct console;
void kgdb_console_write(struct console *co, const char *s, unsigned count);
extern int kgdb_console_setup(struct console *, char *);
/* Prototypes for jmp fns */
#define _JBLEN 9
typedef int jmp_buf[_JBLEN];
extern void longjmp(jmp_buf __jmpb, int __retval);
extern int setjmp(jmp_buf __jmpb);
/* Forced breakpoint */
#define breakpoint() __asm__ __volatile__("trapa #0x3c")
#endif
#endif /* __ASM_SH_KGDB_H */