^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 1) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 2) * Kernel Debugger Architecture Independent Breakpoint Handler
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 3) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 4) * This file is subject to the terms and conditions of the GNU General Public
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 5) * License. See the file "COPYING" in the main directory of this archive
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 6) * for more details.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 7) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 8) * Copyright (c) 1999-2004 Silicon Graphics, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 9) * Copyright (c) 2009 Wind River Systems, Inc. All Rights Reserved.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 10) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 11)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 12) #include <linux/string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 13) #include <linux/kernel.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 14) #include <linux/init.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 15) #include <linux/kdb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 16) #include <linux/kgdb.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 17) #include <linux/smp.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 18) #include <linux/sched.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 19) #include <linux/interrupt.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 20) #include "kdb_private.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 21)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 22) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 23) * Table of kdb_breakpoints
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 24) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 25) kdb_bp_t kdb_breakpoints[KDB_MAXBPT];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 26)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 27) static void kdb_setsinglestep(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 28) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 29) KDB_STATE_SET(DOING_SS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 30) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 31)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 32) static char *kdb_rwtypes[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 33) "Instruction(i)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 34) "Instruction(Register)",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 35) "Data Write",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 36) "I/O",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 37) "Data Access"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 38) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 39)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 40) static char *kdb_bptype(kdb_bp_t *bp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 41) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 42) if (bp->bp_type < 0 || bp->bp_type > 4)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 43) return "";
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 44)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 45) return kdb_rwtypes[bp->bp_type];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 46) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 47)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 48) static int kdb_parsebp(int argc, const char **argv, int *nextargp, kdb_bp_t *bp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 49) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 50) int nextarg = *nextargp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 51) int diag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 52)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 53) bp->bph_length = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 54) if ((argc + 1) != nextarg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 55) if (strncasecmp(argv[nextarg], "datar", sizeof("datar")) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 56) bp->bp_type = BP_ACCESS_WATCHPOINT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 57) else if (strncasecmp(argv[nextarg], "dataw", sizeof("dataw")) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 58) bp->bp_type = BP_WRITE_WATCHPOINT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 59) else if (strncasecmp(argv[nextarg], "inst", sizeof("inst")) == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 60) bp->bp_type = BP_HARDWARE_BREAKPOINT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 61) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 62) return KDB_ARGCOUNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 63)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 64) bp->bph_length = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 65)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 66) nextarg++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 67)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 68) if ((argc + 1) != nextarg) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 69) unsigned long len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 70)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 71) diag = kdbgetularg((char *)argv[nextarg],
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 72) &len);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 73) if (diag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 74) return diag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 75)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 76)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 77) if (len > 8)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 78) return KDB_BADLENGTH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 79)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 80) bp->bph_length = len;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 81) nextarg++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 82) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 83)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 84) if ((argc + 1) != nextarg)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 85) return KDB_ARGCOUNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 86) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 87)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 88) *nextargp = nextarg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 89) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 90) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 91)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 92) static int _kdb_bp_remove(kdb_bp_t *bp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 93) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 94) int ret = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 95) if (!bp->bp_installed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 96) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 97) if (!bp->bp_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 98) ret = dbg_remove_sw_break(bp->bp_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 99) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) ret = arch_kgdb_ops.remove_hw_breakpoint(bp->bp_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) bp->bph_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) bp->bp_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) if (ret == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) bp->bp_installed = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) return ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) static void kdb_handle_bp(struct pt_regs *regs, kdb_bp_t *bp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) if (KDB_DEBUG(BP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) kdb_printf("regs->ip = 0x%lx\n", instruction_pointer(regs));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) * Setup single step
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) kdb_setsinglestep(regs);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) * Reset delay attribute
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) bp->bp_delay = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) bp->bp_delayed = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) static int _kdb_bp_install(struct pt_regs *regs, kdb_bp_t *bp)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) int ret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) * Install the breakpoint, if it is not already installed.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) if (KDB_DEBUG(BP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) kdb_printf("%s: bp_installed %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) __func__, bp->bp_installed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) if (!KDB_STATE(SSBPT))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) bp->bp_delay = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) if (bp->bp_installed)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) if (bp->bp_delay || (bp->bp_delayed && KDB_STATE(DOING_SS))) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) if (KDB_DEBUG(BP))
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) kdb_printf("%s: delayed bp\n", __func__);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) kdb_handle_bp(regs, bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) if (!bp->bp_type)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) ret = dbg_set_sw_break(bp->bp_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) ret = arch_kgdb_ops.set_hw_breakpoint(bp->bp_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) bp->bph_length,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) bp->bp_type);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) if (ret == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) bp->bp_installed = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) kdb_printf("%s: failed to set breakpoint at 0x%lx\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) __func__, bp->bp_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) if (!bp->bp_type) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) kdb_printf("Software breakpoints are unavailable.\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) " Boot the kernel with rodata=off\n"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) " OR use hw breaks: help bph\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) return 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) * kdb_bp_install
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) * Install kdb_breakpoints prior to returning from the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) * kernel debugger. This allows the kdb_breakpoints to be set
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) * upon functions that are used internally by kdb, such as
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) * printk(). This function is only called once per kdb session.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) void kdb_bp_install(struct pt_regs *regs)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) for (i = 0; i < KDB_MAXBPT; i++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) kdb_bp_t *bp = &kdb_breakpoints[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) if (KDB_DEBUG(BP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) kdb_printf("%s: bp %d bp_enabled %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) __func__, i, bp->bp_enabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) if (bp->bp_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) _kdb_bp_install(regs, bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) * kdb_bp_remove
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) * Remove kdb_breakpoints upon entry to the kernel debugger.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) * Parameters:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) * Outputs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) * Locking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) * Remarks:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) void kdb_bp_remove(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) for (i = KDB_MAXBPT - 1; i >= 0; i--) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) kdb_bp_t *bp = &kdb_breakpoints[i];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) if (KDB_DEBUG(BP)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) kdb_printf("%s: bp %d bp_enabled %d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) __func__, i, bp->bp_enabled);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) if (bp->bp_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) _kdb_bp_remove(bp);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) * kdb_printbp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) * Internal function to format and print a breakpoint entry.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) * Parameters:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) * Outputs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) * Locking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235) * Remarks:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238) static void kdb_printbp(kdb_bp_t *bp, int i)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) kdb_printf("%s ", kdb_bptype(bp));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) kdb_printf("BP #%d at ", i);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) kdb_symbol_print(bp->bp_addr, NULL, KDB_SP_DEFAULT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) if (bp->bp_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) kdb_printf("\n is enabled ");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) kdb_printf("\n is disabled");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) kdb_printf(" addr at %016lx, hardtype=%d installed=%d\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) bp->bp_addr, bp->bp_type, bp->bp_installed);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) kdb_printf("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) * kdb_bp
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) * Handle the bp commands.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) * [bp|bph] <addr-expression> [DATAR|DATAW]
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) * Parameters:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) * argc Count of arguments in argv
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) * argv Space delimited command line arguments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) * Outputs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) * Zero for success, a kdb diagnostic if failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) * Locking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) * Remarks:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) * bp Set breakpoint on all cpus. Only use hardware assist if need.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) * bph Set breakpoint on all cpus. Force hardware register
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) static int kdb_bp(int argc, const char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) int i, bpno;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) kdb_bp_t *bp, *bp_check;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) int diag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) char *symname = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) long offset = 0ul;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) int nextarg;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) kdb_bp_t template = {0};
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) if (argc == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) * Display breakpoint table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) for (bpno = 0, bp = kdb_breakpoints; bpno < KDB_MAXBPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) bpno++, bp++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) if (bp->bp_free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) kdb_printbp(bp, bpno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) nextarg = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) diag = kdbgetaddrarg(argc, argv, &nextarg, &template.bp_addr,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) &offset, &symname);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) if (diag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) return diag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) if (!template.bp_addr)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) return KDB_BADINT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) * This check is redundant (since the breakpoint machinery should
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) * be doing the same check during kdb_bp_install) but gives the
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) * user immediate feedback.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) diag = kgdb_validate_break_address(template.bp_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) if (diag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) return diag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) * Find an empty bp structure to allocate
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) for (bpno = 0, bp = kdb_breakpoints; bpno < KDB_MAXBPT; bpno++, bp++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) if (bp->bp_free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) if (bpno == KDB_MAXBPT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) return KDB_TOOMANYBPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) if (strcmp(argv[0], "bph") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) template.bp_type = BP_HARDWARE_BREAKPOINT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) diag = kdb_parsebp(argc, argv, &nextarg, &template);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) if (diag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) return diag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) template.bp_type = BP_BREAKPOINT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) * Check for clashing breakpoints.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) * Note, in this design we can't have hardware breakpoints
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) * enabled for both read and write on the same address.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) for (i = 0, bp_check = kdb_breakpoints; i < KDB_MAXBPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) i++, bp_check++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) if (!bp_check->bp_free &&
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) bp_check->bp_addr == template.bp_addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) kdb_printf("You already have a breakpoint at "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) kdb_bfd_vma_fmt0 "\n", template.bp_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) return KDB_DUPBPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) template.bp_enabled = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) * Actually allocate the breakpoint found earlier
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) *bp = template;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) bp->bp_free = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) kdb_printbp(bp, bpno);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) * kdb_bc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) * Handles the 'bc', 'be', and 'bd' commands
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) * [bd|bc|be] <breakpoint-number>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) * [bd|bc|be] *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) * Parameters:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) * argc Count of arguments in argv
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) * argv Space delimited command line arguments
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) * Outputs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) * Zero for success, a kdb diagnostic for failure
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) * Locking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) * Remarks:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) static int kdb_bc(int argc, const char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) unsigned long addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) kdb_bp_t *bp = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) int lowbp = KDB_MAXBPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) int highbp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) int done = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) int diag = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) int cmd; /* KDBCMD_B? */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) #define KDBCMD_BC 0
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) #define KDBCMD_BE 1
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) #define KDBCMD_BD 2
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) if (strcmp(argv[0], "be") == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) cmd = KDBCMD_BE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) else if (strcmp(argv[0], "bd") == 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) cmd = KDBCMD_BD;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) cmd = KDBCMD_BC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) if (argc != 1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) return KDB_ARGCOUNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) if (strcmp(argv[1], "*") == 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) lowbp = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) highbp = KDB_MAXBPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) diag = kdbgetularg(argv[1], &addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) if (diag)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) return diag;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) * For addresses less than the maximum breakpoint number,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) * assume that the breakpoint number is desired.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) if (addr < KDB_MAXBPT) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) lowbp = highbp = addr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) highbp++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) } else {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) for (i = 0, bp = kdb_breakpoints; i < KDB_MAXBPT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) i++, bp++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) if (bp->bp_addr == addr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) lowbp = highbp = i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) highbp++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) * Now operate on the set of breakpoints matching the input
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) * criteria (either '*' for all, or an individual breakpoint).
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) for (bp = &kdb_breakpoints[lowbp], i = lowbp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) i < highbp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) i++, bp++) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) if (bp->bp_free)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) continue;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) done++;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) switch (cmd) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) case KDBCMD_BC:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) bp->bp_enabled = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) kdb_printf("Breakpoint %d at "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) kdb_bfd_vma_fmt " cleared\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) i, bp->bp_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) bp->bp_addr = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) bp->bp_free = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) case KDBCMD_BE:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) bp->bp_enabled = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) kdb_printf("Breakpoint %d at "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) kdb_bfd_vma_fmt " enabled",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) i, bp->bp_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) kdb_printf("\n");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) case KDBCMD_BD:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) if (!bp->bp_enabled)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) bp->bp_enabled = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) kdb_printf("Breakpoint %d at "
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) kdb_bfd_vma_fmt " disabled\n",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) i, bp->bp_addr);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) break;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) if (bp->bp_delay && (cmd == KDBCMD_BC || cmd == KDBCMD_BD)) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) bp->bp_delay = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) KDB_STATE_CLEAR(SSBPT);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) return (!done) ? KDB_BPTNOTFOUND : 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) * kdb_ss
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) * Process the 'ss' (Single Step) command.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) * ss
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) * Parameters:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) * argc Argument count
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) * argv Argument vector
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) * Outputs:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) * Returns:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) * KDB_CMD_SS for success, a kdb error if failure.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) * Locking:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) * None.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) * Remarks:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 509) *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 510) * Set the arch specific option to trigger a debug trap after the next
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 511) * instruction.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 512) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 513)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 514) static int kdb_ss(int argc, const char **argv)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 515) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 516) if (argc != 0)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 517) return KDB_ARGCOUNT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 518) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 519) * Set trace flag and go.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 520) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 521) KDB_STATE_SET(DOING_SS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 522) return KDB_CMD_SS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 523) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 524)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 525) /* Initialize the breakpoint table and register breakpoint commands. */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 526)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 527) void __init kdb_initbptab(void)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 528) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 529) int i;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 530) kdb_bp_t *bp;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 531)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 532) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 533) * First time initialization.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 534) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 535) memset(&kdb_breakpoints, '\0', sizeof(kdb_breakpoints));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 536)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 537) for (i = 0, bp = kdb_breakpoints; i < KDB_MAXBPT; i++, bp++)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 538) bp->bp_free = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 539)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 540) kdb_register_flags("bp", kdb_bp, "[<vaddr>]",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 541) "Set/Display breakpoints", 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 542) KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 543) kdb_register_flags("bl", kdb_bp, "[<vaddr>]",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 544) "Display breakpoints", 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 545) KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 546) if (arch_kgdb_ops.flags & KGDB_HW_BREAKPOINT)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 547) kdb_register_flags("bph", kdb_bp, "[<vaddr>]",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 548) "[datar [length]|dataw [length]] Set hw brk", 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 549) KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 550) kdb_register_flags("bc", kdb_bc, "<bpnum>",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 551) "Clear Breakpoint", 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 552) KDB_ENABLE_FLOW_CTRL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 553) kdb_register_flags("be", kdb_bc, "<bpnum>",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 554) "Enable Breakpoint", 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 555) KDB_ENABLE_FLOW_CTRL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 556) kdb_register_flags("bd", kdb_bc, "<bpnum>",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 557) "Disable Breakpoint", 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 558) KDB_ENABLE_FLOW_CTRL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 559)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 560) kdb_register_flags("ss", kdb_ss, "",
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 561) "Single Step", 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 562) KDB_ENABLE_FLOW_CTRL | KDB_REPEAT_NO_ARGS);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 563) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 564) * Architecture dependent initialization.
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 565) */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 566) }
Orange Pi5 kernel
Deprecated Linux kernel 5.10.110 for OrangePi 5/5B/5+ boards
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