/* $OpenBSD: db_machdep.h,v 1.2 1997/03/21 00:48:48 niklas Exp $ */
/* $NetBSD: db_machdep.h,v 1.30 2021/03/11 08:33:34 simonb Exp $ */
/*
* Mach Operating System
* Copyright (c) 1992 Carnegie Mellon University
* All Rights Reserved.
*
* Permission to use, copy, modify and distribute this software and its
* documentation is hereby granted, provided that both the copyright
* notice and this permission notice appear in all copies of the
* software, derivative works or modified versions, and any portions
* thereof, and that both notices appear in supporting documentation.
*
* CARNEGIE MELLON ALLOWS FREE USE OF THIS SOFTWARE IN ITS "AS IS"
* CONDITION. CARNEGIE MELLON DISCLAIMS ANY LIABILITY OF ANY KIND FOR
* ANY DAMAGES WHATSOEVER RESULTING FROM THE USE OF THIS SOFTWARE.
*
* Carnegie Mellon requests users of this software to return to
*
* Software Distribution Coordinator or
[email protected]
* School of Computer Science
* Carnegie Mellon University
* Pittsburgh PA 15213-3890
*
* any improvements or extensions that they make and grant Carnegie Mellon
* the rights to redistribute these changes.
*/
/*
* Machine-dependent defines for new kernel debugger.
*/
#ifndef _PPC_DB_MACHDEP_H_
#define _PPC_DB_MACHDEP_H_
#if defined(_KERNEL_OPT)
#include "opt_ppcarch.h"
#endif
#include <uvm/uvm_prot.h>
#include <uvm/uvm_param.h>
#include <machine/trap.h>
#define DB_ELF_SYMBOLS
typedef vaddr_t db_addr_t; /* address - unsigned */
#define DDB_EXPR_FMT "l" /* expression is long */
typedef long db_expr_t; /* expression - signed */
struct powerpc_saved_state {
u_int32_t r[32]; /* data registers */
u_int32_t iar;
u_int32_t msr;
u_int32_t lr;
u_int32_t ctr;
u_int32_t cr;
u_int32_t xer;
u_int32_t mq;
u_int32_t dear;
u_int32_t esr;
u_int32_t pid;
};
typedef struct powerpc_saved_state db_regs_t;
extern db_regs_t ddb_regs; /* register state */
#define DDB_REGS (&ddb_regs)
#define PC_REGS(regs) (*(db_addr_t *)&(regs)->iar)
#define BKPT_ADDR(addr) (addr) /* breakpoint address */
#define BKPT_ASM "trap" /* should match BKPT_INST */
#define BKPT_INST 0x7fe00008 /* breakpoint instruction */
#define BKPT_SIZE (4) /* size of breakpoint inst */
#define BKPT_SET(inst, addr) (BKPT_INST)
#if !defined(PPC_BOOKE) && !defined(PPC_IBM4XX)
#define SR_SINGLESTEP 0x400 /* PSL_SE, available only for oea */
#define db_clear_single_step(regs) ((regs)->msr &= ~SR_SINGLESTEP)
#define db_set_single_step(regs) ((regs)->msr |= SR_SINGLESTEP)
#else
#define SOFTWARE_SSTEP
#endif
#define T_BREAKPOINT 0xffff
#define IS_BREAKPOINT_TRAP(type, code) ((type) == T_BREAKPOINT)
#define T_WATCHPOINT 0xeeee
#ifdef T_WATCHPOINT
#define IS_WATCHPOINT_TRAP(type, code) ((type) == T_WATCHPOINT)
#else
#define IS_WATCHPOINT_TRAP(type, code) 0
#endif
#define M_RTS 0xfc0007ff
#define I_RTS 0x4c000020
#define I_BLRL 0x4c000021
#define M_BC 0xfc000001
#define I_BC 0x40000000
#define I_BCL 0x40000001
#define M_B 0xfc000001
#define I_B 0x48000000
#define I_BL 0x48000001
#define M_BCTR 0xfc0007ff
#define I_BCTR 0x4c000420
#define I_BCTRL 0x4c000421
#define M_RFI 0xfc0007fe
#define I_RFI 0x4c000064
#define inst_trap_return(ins) (((ins)&M_RFI) == I_RFI)
#define inst_return(ins) (((ins)&M_RTS) == I_RTS)
#define inst_call(ins) (((ins)&M_BC ) == I_BCL || \
((ins)&M_B ) == I_BL || \
((ins)&M_BCTR) == I_BCTRL || \
((ins)&M_RTS ) == I_BLRL )
#define inst_branch(ins) (((ins)&M_BC ) == I_BC || \
((ins)&M_B ) == I_B || \
((ins)&M_BCTR) == I_BCTR )
#define inst_unconditional_flow_transfer(ins) \
(((ins)&M_B ) == I_B || \
((ins)&M_BCTR) == I_BCTR )
#define inst_load(ins) 0
#define inst_store(ins) 0
#if defined(PPC_IBM4XX) || defined(PPC_BOOKE)
#define next_instr_address(v, b) ((db_addr_t) ((b) ? (v) : ((v) + 4)))
extern db_addr_t branch_taken(int, db_addr_t, db_regs_t *);
#endif
/*
* GDB's register array is:
* 32 4-byte GPRs
* 32 8-byte FPRs
* 7 4-byte UISA special-purpose registers
* 16 4-byte segment registers
* 32 4-byte standard OEA special-purpose registers,
* and up to 64 4-byte non-standard OES special-purpose registers.
* GDB keeps some extra space, so the total size of the register array
* they use is 880 bytes (gdb-5.0).
* KGDB_NUMREGS 220
*/
/*
* GDB's register array of gdb-6.0 is defined in
* usr/src/gnu/dist/gdb6/gdb/regformats/reg-ppc.dat
* GDB's register array is:
* 32 4-byte GPRs
* 32 8-byte FPRs
* 7 4-byte UISA special-purpose registers: pc, ps, cr, lr, ctr, xer, fpscr
* index of pc in array: 32 + 2*32 = 96
* size 32 * 4 + 32 * 8 + 7 * 4 = 103 * 4 = 412 bytes
* KGD_NUMREGS 103
*/
typedef long kgdb_reg_t;
#define KGDB_PPC_PC_REG 96 /* first UISA SP register */
#define KGDB_PPC_MSR_REG 97
#define KGDB_PPC_CR_REG 98
#define KGDB_PPC_LR_REG 99
#define KGDB_PPC_CTR_REG 100
#define KGDB_PPC_XER_REG 101
#define KGDB_PPC_FPSCR_REG 102
#define KGDB_NUMREGS 103 /* Treat all registers as 4-byte */
#define KGDB_BUFLEN (2*KGDB_NUMREGS*sizeof(kgdb_reg_t)+1)
#ifdef _KERNEL
void kdb_kintr(void *);
int kdb_trap(int, void *);
bool ddb_running_on_this_cpu_p(void);
bool ddb_running_on_any_cpu_p(void);
void db_resume_others(void);
/*
* We have machine-dependent commands.
*/
#define DB_MACHINE_COMMANDS
#endif /* _KERNEL */
#endif /* _PPC_DB_MACHDEP_H_ */
