diff --git a/drivers/staging/android/fiq_debugger/fiq_debugger.c b/drivers/staging/android/fiq_debugger/fiq_debugger.c index 1d73362..ceb45bc9e 100644 --- a/drivers/staging/android/fiq_debugger/fiq_debugger.c +++ b/drivers/staging/android/fiq_debugger/fiq_debugger.c @@ -30,6 +30,7 @@ #include #include #include +#include #include #include #include @@ -395,7 +396,7 @@ cmd += 6; while (*cmd == ' ') cmd++; - if (cmd != '\0') + if ((cmd != '\0') && sysrq_on()) kernel_restart(cmd); else kernel_restart(NULL); @@ -425,30 +426,39 @@ static void fiq_debugger_help(struct fiq_debugger_state *state) { fiq_debugger_printf(&state->output, - "FIQ Debugger commands:\n" - " pc PC status\n" - " regs Register dump\n" - " allregs Extended Register dump\n" - " bt Stack trace\n"); + "FIQ Debugger commands:\n"); + if (sysrq_on()) { + fiq_debugger_printf(&state->output, + " pc PC status\n" + " regs Register dump\n" + " allregs Extended Register dump\n" + " bt Stack trace\n"); + fiq_debugger_printf(&state->output, + " reboot [] Reboot with command \n" + " reset [] Hard reset with command \n" + " irqs Interrupt status\n" + " kmsg Kernel log\n" + " version Kernel version\n"); + fiq_debugger_printf(&state->output, + " cpu Current CPU\n" + " cpu Switch to CPU\n" + " sysrq sysrq options\n" + " sysrq Execute sysrq with \n"); + } else { + fiq_debugger_printf(&state->output, + " reboot Reboot\n" + " reset Hard reset\n" + " irqs Interrupt status\n"); + } fiq_debugger_printf(&state->output, - " reboot [] Reboot with command \n" - " reset [] Hard reset with command \n" - " irqs Interupt status\n" - " kmsg Kernel log\n" - " version Kernel version\n"); - fiq_debugger_printf(&state->output, - " sleep Allow sleep while in FIQ\n" - " nosleep Disable sleep while in FIQ\n" - " console Switch terminal to console\n" - " cpu Current CPU\n" - " cpu Switch to CPU\n"); - fiq_debugger_printf(&state->output, - " ps Process list\n" - " sysrq sysrq options\n" - " sysrq Execute sysrq with \n"); + " sleep Allow sleep while in FIQ\n" + " nosleep Disable sleep while in FIQ\n" + " console Switch terminal to console\n" + " ps Process list\n"); #ifdef CONFIG_KGDB - fiq_debugger_printf(&state->output, - " kgdb Enter kernel debugger\n"); + if (fiq_kgdb_enable) { + fiq_debugger_printf(&state->output, + " kgdb Enter kernel debugger\n"); #endif } @@ -480,18 +490,23 @@ if (!strcmp(cmd, "help") || !strcmp(cmd, "?")) { fiq_debugger_help(state); } else if (!strcmp(cmd, "pc")) { - fiq_debugger_dump_pc(&state->output, regs); + if (sysrq_on()) + fiq_debugger_dump_pc(&state->output, regs); } else if (!strcmp(cmd, "regs")) { - fiq_debugger_dump_regs(&state->output, regs); + if (sysrq_on()) + fiq_debugger_dump_regs(&state->output, regs); } else if (!strcmp(cmd, "allregs")) { - fiq_debugger_dump_allregs(&state->output, regs); + if (sysrq_on()) + fiq_debugger_dump_allregs(&state->output, regs); } else if (!strcmp(cmd, "bt")) { - fiq_debugger_dump_stacktrace(&state->output, regs, 100, svc_sp); + if (sysrq_on()) + fiq_debugger_dump_stacktrace(&state->output, regs, + 100, svc_sp); } else if (!strncmp(cmd, "reset", 5)) { cmd += 5; while (*cmd == ' ') cmd++; - if (*cmd) { + if (*cmd && sysrq_on()) { char tmp_cmd[32]; strlcpy(tmp_cmd, cmd, sizeof(tmp_cmd)); machine_restart(tmp_cmd); @@ -501,9 +516,12 @@ } else if (!strcmp(cmd, "irqs")) { fiq_debugger_dump_irqs(state); } else if (!strcmp(cmd, "kmsg")) { - fiq_debugger_dump_kernel_log(state); + if (sysrq_on()) + fiq_debugger_dump_kernel_log(state); } else if (!strcmp(cmd, "version")) { - fiq_debugger_printf(&state->output, "%s\n", linux_banner); + if (sysrq_on()) + fiq_debugger_printf(&state->output, "%s\n", + linux_banner); } else if (!strcmp(cmd, "sleep")) { state->no_sleep = false; fiq_debugger_printf(&state->output, "enabling sleep\n"); @@ -515,14 +533,17 @@ fiq_debugger_uart_flush(state); state->console_enable = true; } else if (!strcmp(cmd, "cpu")) { - fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu); - } else if (!strncmp(cmd, "cpu ", 4)) { + if (sysrq_on()) + fiq_debugger_printf(&state->output, "cpu %d\n", + state->current_cpu); + } else if (!strncmp(cmd, "cpu ", 4) && sysrq_on()) { unsigned long cpu = 0; if (strict_strtoul(cmd + 4, 10, &cpu) == 0) fiq_debugger_switch_cpu(state, cpu); else fiq_debugger_printf(&state->output, "invalid cpu\n"); - fiq_debugger_printf(&state->output, "cpu %d\n", state->current_cpu); + fiq_debugger_printf(&state->output, "cpu %d\n", + state->current_cpu); } else { if (state->debug_busy) { fiq_debugger_printf(&state->output, diff --git a/drivers/tty/sysrq.c b/drivers/tty/sysrq.c index b51c154..08c9406 100644 --- a/drivers/tty/sysrq.c +++ b/drivers/tty/sysrq.c @@ -55,10 +55,11 @@ unsigned short platform_sysrq_reset_seq[] __weak = { KEY_RESERVED }; int sysrq_reset_downtime_ms __weak; -static bool sysrq_on(void) +bool sysrq_on(void) { return sysrq_enabled || sysrq_always_enabled; } +EXPORT_SYMBOL(sysrq_on); /* * A value of 1 means 'all', other nonzero values are an op mask: diff --git a/include/linux/sysrq.h b/include/linux/sysrq.h index 7faf933..5a0bd93 100644 --- a/include/linux/sysrq.h +++ b/include/linux/sysrq.h @@ -45,6 +45,7 @@ * are available -- else NULL's). */ +bool sysrq_on(void); void handle_sysrq(int key); void __handle_sysrq(int key, bool check_mask); int register_sysrq_key(int key, struct sysrq_key_op *op);