diff options
Diffstat (limited to 'arch/arm/kernel')
-rw-r--r-- | arch/arm/kernel/Makefile | 9 | ||||
-rw-r--r-- | arch/arm/kernel/debug.S | 4 | ||||
-rw-r--r-- | arch/arm/kernel/head.S | 4 | ||||
-rw-r--r-- | arch/arm/kernel/hw_breakpoint.c | 275 | ||||
-rw-r--r-- | arch/arm/kernel/irq.c | 3 | ||||
-rw-r--r-- | arch/arm/kernel/kprobes-arm.c | 4 | ||||
-rw-r--r-- | arch/arm/kernel/kprobes-test-arm.c | 1323 | ||||
-rw-r--r-- | arch/arm/kernel/kprobes-test-thumb.c | 1187 | ||||
-rw-r--r-- | arch/arm/kernel/kprobes-test.c | 1748 | ||||
-rw-r--r-- | arch/arm/kernel/kprobes-test.h | 392 | ||||
-rw-r--r-- | arch/arm/kernel/kprobes-thumb.c | 7 | ||||
-rw-r--r-- | arch/arm/kernel/kprobes.h | 8 | ||||
-rw-r--r-- | arch/arm/kernel/perf_event.c | 475 | ||||
-rw-r--r-- | arch/arm/kernel/perf_event_v6.c | 87 | ||||
-rw-r--r-- | arch/arm/kernel/perf_event_v7.c | 395 | ||||
-rw-r--r-- | arch/arm/kernel/perf_event_xscale.c | 90 | ||||
-rw-r--r-- | arch/arm/kernel/pmu.c | 182 | ||||
-rw-r--r-- | arch/arm/kernel/setup.c | 21 | ||||
-rw-r--r-- | arch/arm/kernel/sleep.S | 85 | ||||
-rw-r--r-- | arch/arm/kernel/smp.c | 38 | ||||
-rw-r--r-- | arch/arm/kernel/smp_twd.c | 47 | ||||
-rw-r--r-- | arch/arm/kernel/suspend.c | 72 |
22 files changed, 5562 insertions, 894 deletions
diff --git a/arch/arm/kernel/Makefile b/arch/arm/kernel/Makefile index 68036eece34..16eed6aebfa 100644 --- a/arch/arm/kernel/Makefile +++ b/arch/arm/kernel/Makefile @@ -29,7 +29,7 @@ obj-$(CONFIG_MODULES) += armksyms.o module.o obj-$(CONFIG_ARTHUR) += arthur.o obj-$(CONFIG_ISA_DMA) += dma-isa.o obj-$(CONFIG_PCI) += bios32.o isa.o -obj-$(CONFIG_ARM_CPU_SUSPEND) += sleep.o +obj-$(CONFIG_ARM_CPU_SUSPEND) += sleep.o suspend.o obj-$(CONFIG_HAVE_SCHED_CLOCK) += sched_clock.o obj-$(CONFIG_SMP) += smp.o smp_tlb.o obj-$(CONFIG_HAVE_ARM_SCU) += smp_scu.o @@ -43,6 +43,13 @@ obj-$(CONFIG_KPROBES) += kprobes-thumb.o else obj-$(CONFIG_KPROBES) += kprobes-arm.o endif +obj-$(CONFIG_ARM_KPROBES_TEST) += test-kprobes.o +test-kprobes-objs := kprobes-test.o +ifdef CONFIG_THUMB2_KERNEL +test-kprobes-objs += kprobes-test-thumb.o +else +test-kprobes-objs += kprobes-test-arm.o +endif obj-$(CONFIG_ATAGS_PROC) += atags.o obj-$(CONFIG_OABI_COMPAT) += sys_oabi-compat.o obj-$(CONFIG_ARM_THUMBEE) += thumbee.o diff --git a/arch/arm/kernel/debug.S b/arch/arm/kernel/debug.S index 0f852d082fc..204e2160cfc 100644 --- a/arch/arm/kernel/debug.S +++ b/arch/arm/kernel/debug.S @@ -22,7 +22,7 @@ #if defined(CONFIG_DEBUG_ICEDCC) @@ debug using ARM EmbeddedICE DCC channel - .macro addruart, rp, rv + .macro addruart, rp, rv, tmp .endm #if defined(CONFIG_CPU_V6) || defined(CONFIG_CPU_V6K) || defined(CONFIG_CPU_V7) @@ -106,7 +106,7 @@ #ifdef CONFIG_MMU .macro addruart_current, rx, tmp1, tmp2 - addruart \tmp1, \tmp2 + addruart \tmp1, \tmp2, \rx mrc p15, 0, \rx, c1, c0 tst \rx, #1 moveq \rx, \tmp1 diff --git a/arch/arm/kernel/head.S b/arch/arm/kernel/head.S index 239703dbdf4..566c54c2a1f 100644 --- a/arch/arm/kernel/head.S +++ b/arch/arm/kernel/head.S @@ -99,7 +99,7 @@ ENTRY(stext) sub r4, r3, r4 @ (PHYS_OFFSET - PAGE_OFFSET) add r8, r8, r4 @ PHYS_OFFSET #else - ldr r8, =PLAT_PHYS_OFFSET + ldr r8, =PHYS_OFFSET @ always constant in this case #endif /* @@ -238,7 +238,7 @@ __create_page_tables: * This allows debug messages to be output * via a serial console before paging_init. */ - addruart r7, r3 + addruart r7, r3, r0 mov r3, r3, lsr #SECTION_SHIFT mov r3, r3, lsl #PMD_ORDER diff --git a/arch/arm/kernel/hw_breakpoint.c b/arch/arm/kernel/hw_breakpoint.c index a927ca1f556..814a52a9dc3 100644 --- a/arch/arm/kernel/hw_breakpoint.c +++ b/arch/arm/kernel/hw_breakpoint.c @@ -45,7 +45,6 @@ static DEFINE_PER_CPU(struct perf_event *, wp_on_reg[ARM_MAX_WRP]); /* Number of BRP/WRP registers on this CPU. */ static int core_num_brps; -static int core_num_reserved_brps; static int core_num_wrps; /* Debug architecture version. */ @@ -137,10 +136,11 @@ static u8 get_debug_arch(void) u32 didr; /* Do we implement the extended CPUID interface? */ - if (WARN_ONCE((((read_cpuid_id() >> 16) & 0xf) != 0xf), - "CPUID feature registers not supported. " - "Assuming v6 debug is present.\n")) + if (((read_cpuid_id() >> 16) & 0xf) != 0xf) { + pr_warning("CPUID feature registers not supported. " + "Assuming v6 debug is present.\n"); return ARM_DEBUG_ARCH_V6; + } ARM_DBG_READ(c0, 0, didr); return (didr >> 16) & 0xf; @@ -154,10 +154,21 @@ u8 arch_get_debug_arch(void) static int debug_arch_supported(void) { u8 arch = get_debug_arch(); - return arch >= ARM_DEBUG_ARCH_V6 && arch <= ARM_DEBUG_ARCH_V7_ECP14; + + /* We don't support the memory-mapped interface. */ + return (arch >= ARM_DEBUG_ARCH_V6 && arch <= ARM_DEBUG_ARCH_V7_ECP14) || + arch >= ARM_DEBUG_ARCH_V7_1; +} + +/* Determine number of WRP registers available. */ +static int get_num_wrp_resources(void) +{ + u32 didr; + ARM_DBG_READ(c0, 0, didr); + return ((didr >> 28) & 0xf) + 1; } -/* Determine number of BRP register available. */ +/* Determine number of BRP registers available. */ static int get_num_brp_resources(void) { u32 didr; @@ -176,9 +187,10 @@ static int core_has_mismatch_brps(void) static int get_num_wrps(void) { /* - * FIXME: When a watchpoint fires, the only way to work out which - * watchpoint it was is by disassembling the faulting instruction - * and working out the address of the memory access. + * On debug architectures prior to 7.1, when a watchpoint fires, the + * only way to work out which watchpoint it was is by disassembling + * the faulting instruction and working out the address of the memory + * access. * * Furthermore, we can only do this if the watchpoint was precise * since imprecise watchpoints prevent us from calculating register @@ -192,36 +204,17 @@ static int get_num_wrps(void) * [the ARM ARM states that the DFAR is UNKNOWN, but experience shows * that it is set on some implementations]. */ + if (get_debug_arch() < ARM_DEBUG_ARCH_V7_1) + return 1; -#if 0 - int wrps; - u32 didr; - ARM_DBG_READ(c0, 0, didr); - wrps = ((didr >> 28) & 0xf) + 1; -#endif - int wrps = 1; - - if (core_has_mismatch_brps() && wrps >= get_num_brp_resources()) - wrps = get_num_brp_resources() - 1; - - return wrps; -} - -/* We reserve one breakpoint for each watchpoint. */ -static int get_num_reserved_brps(void) -{ - if (core_has_mismatch_brps()) - return get_num_wrps(); - return 0; + return get_num_wrp_resources(); } /* Determine number of usable BRPs available. */ static int get_num_brps(void) { int brps = get_num_brp_resources(); - if (core_has_mismatch_brps()) - brps -= get_num_reserved_brps(); - return brps; + return core_has_mismatch_brps() ? brps - 1 : brps; } /* @@ -239,7 +232,7 @@ static int enable_monitor_mode(void) /* Ensure that halting mode is disabled. */ if (WARN_ONCE(dscr & ARM_DSCR_HDBGEN, - "halting debug mode enabled. Unable to access hardware resources.\n")) { + "halting debug mode enabled. Unable to access hardware resources.\n")) { ret = -EPERM; goto out; } @@ -255,6 +248,7 @@ static int enable_monitor_mode(void) ARM_DBG_WRITE(c1, 0, (dscr | ARM_DSCR_MDBGEN)); break; case ARM_DEBUG_ARCH_V7_ECP14: + case ARM_DEBUG_ARCH_V7_1: ARM_DBG_WRITE(c2, 2, (dscr | ARM_DSCR_MDBGEN)); break; default: @@ -346,24 +340,10 @@ int arch_install_hw_breakpoint(struct perf_event *bp) val_base = ARM_BASE_BVR; slots = (struct perf_event **)__get_cpu_var(bp_on_reg); max_slots = core_num_brps; - if (info->step_ctrl.enabled) { - /* Override the breakpoint data with the step data. */ - addr = info->trigger & ~0x3; - ctrl = encode_ctrl_reg(info->step_ctrl); - } } else { /* Watchpoint */ - if (info->step_ctrl.enabled) { - /* Install into the reserved breakpoint region. */ - ctrl_base = ARM_BASE_BCR + core_num_brps; - val_base = ARM_BASE_BVR + core_num_brps; - /* Override the watchpoint data with the step data. */ - addr = info->trigger & ~0x3; - ctrl = encode_ctrl_reg(info->step_ctrl); - } else { - ctrl_base = ARM_BASE_WCR; - val_base = ARM_BASE_WVR; - } + ctrl_base = ARM_BASE_WCR; + val_base = ARM_BASE_WVR; slots = (struct perf_event **)__get_cpu_var(wp_on_reg); max_slots = core_num_wrps; } @@ -382,6 +362,17 @@ int arch_install_hw_breakpoint(struct perf_event *bp) goto out; } + /* Override the breakpoint data with the step data. */ + if (info->step_ctrl.enabled) { + addr = info->trigger & ~0x3; + ctrl = encode_ctrl_reg(info->step_ctrl); + if (info->ctrl.type != ARM_BREAKPOINT_EXECUTE) { + i = 0; + ctrl_base = ARM_BASE_BCR + core_num_brps; + val_base = ARM_BASE_BVR + core_num_brps; + } + } + /* Setup the address register. */ write_wb_reg(val_base + i, addr); @@ -405,10 +396,7 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp) max_slots = core_num_brps; } else { /* Watchpoint */ - if (info->step_ctrl.enabled) - base = ARM_BASE_BCR + core_num_brps; - else - base = ARM_BASE_WCR; + base = ARM_BASE_WCR; slots = (struct perf_event **)__get_cpu_var(wp_on_reg); max_slots = core_num_wrps; } @@ -426,6 +414,13 @@ void arch_uninstall_hw_breakpoint(struct perf_event *bp) if (WARN_ONCE(i == max_slots, "Can't find any breakpoint slot\n")) return; + /* Ensure that we disable the mismatch breakpoint. */ + if (info->ctrl.type != ARM_BREAKPOINT_EXECUTE && + info->step_ctrl.enabled) { + i = 0; + base = ARM_BASE_BCR + core_num_brps; + } + /* Reset the control register. */ write_wb_reg(base + i, 0); } @@ -632,10 +627,9 @@ int arch_validate_hwbkpt_settings(struct perf_event *bp) * we can use the mismatch feature as a poor-man's hardware * single-step, but this only works for per-task breakpoints. */ - if (WARN_ONCE(!bp->overflow_handler && - (arch_check_bp_in_kernelspace(bp) || !core_has_mismatch_brps() - || !bp->hw.bp_target), - "overflow handler required but none found\n")) { + if (!bp->overflow_handler && (arch_check_bp_in_kernelspace(bp) || + !core_has_mismatch_brps() || !bp->hw.bp_target)) { + pr_warning("overflow handler required but none found\n"); ret = -EINVAL; } out: @@ -666,34 +660,62 @@ static void disable_single_step(struct perf_event *bp) arch_install_hw_breakpoint(bp); } -static void watchpoint_handler(unsigned long unknown, struct pt_regs *regs) +static void watchpoint_handler(unsigned long addr, unsigned int fsr, + struct pt_regs *regs) { - int i; + int i, access; + u32 val, ctrl_reg, alignment_mask; struct perf_event *wp, **slots; struct arch_hw_breakpoint *info; + struct arch_hw_breakpoint_ctrl ctrl; slots = (struct perf_event **)__get_cpu_var(wp_on_reg); - /* Without a disassembler, we can only handle 1 watchpoint. */ - BUG_ON(core_num_wrps > 1); - for (i = 0; i < core_num_wrps; ++i) { rcu_read_lock(); wp = slots[i]; - if (wp == NULL) { - rcu_read_unlock(); - continue; - } + if (wp == NULL) + goto unlock; + info = counter_arch_bp(wp); /* - * The DFAR is an unknown value. Since we only allow a - * single watchpoint, we can set the trigger to the lowest - * possible faulting address. + * The DFAR is an unknown value on debug architectures prior + * to 7.1. Since we only allow a single watchpoint on these + * older CPUs, we can set the trigger to the lowest possible + * faulting address. */ - info = counter_arch_bp(wp); - info->trigger = wp->attr.bp_addr; + if (debug_arch < ARM_DEBUG_ARCH_V7_1) { + BUG_ON(i > 0); + info->trigger = wp->attr.bp_addr; + } else { + if (info->ctrl.len == ARM_BREAKPOINT_LEN_8) + alignment_mask = 0x7; + else + alignment_mask = 0x3; + + /* Check if the watchpoint value matches. */ + val = read_wb_reg(ARM_BASE_WVR + i); + if (val != (addr & ~alignment_mask)) + goto unlock; + + /* Possible match, check the byte address select. */ + ctrl_reg = read_wb_reg(ARM_BASE_WCR + i); + decode_ctrl_reg(ctrl_reg, &ctrl); + if (!((1 << (addr & alignment_mask)) & ctrl.len)) + goto unlock; + + /* Check that the access type matches. */ + access = (fsr & ARM_FSR_ACCESS_MASK) ? HW_BREAKPOINT_W : + HW_BREAKPOINT_R; + if (!(access & hw_breakpoint_type(wp))) + goto unlock; + + /* We have a winner. */ + info->trigger = addr; + } + pr_debug("watchpoint fired: address = 0x%x\n", info->trigger); perf_bp_event(wp, regs); @@ -705,6 +727,7 @@ static void watchpoint_handler(unsigned long unknown, struct pt_regs *regs) if (!wp->overflow_handler) enable_single_step(wp, instruction_pointer(regs)); +unlock: rcu_read_unlock(); } } @@ -717,7 +740,7 @@ static void watchpoint_single_step_handler(unsigned long pc) slots = (struct perf_event **)__get_cpu_var(wp_on_reg); - for (i = 0; i < core_num_reserved_brps; ++i) { + for (i = 0; i < core_num_wrps; ++i) { rcu_read_lock(); wp = slots[i]; @@ -820,7 +843,7 @@ static int hw_breakpoint_pending(unsigned long addr, unsigned int fsr, case ARM_ENTRY_ASYNC_WATCHPOINT: WARN(1, "Asynchronous watchpoint exception taken. Debugging results may be unreliable\n"); case ARM_ENTRY_SYNC_WATCHPOINT: - watchpoint_handler(addr, regs); + watchpoint_handler(addr, fsr, regs); break; default: ret = 1; /* Unhandled fault. */ @@ -834,11 +857,31 @@ static int hw_breakpoint_pending(unsigned long addr, unsigned int fsr, /* * One-time initialisation. */ -static void reset_ctrl_regs(void *info) +static cpumask_t debug_err_mask; + +static int debug_reg_trap(struct pt_regs *regs, unsigned int instr) { - int i, cpu = smp_processor_id(); + int cpu = smp_processor_id(); + + pr_warning("Debug register access (0x%x) caused undefined instruction on CPU %d\n", + instr, cpu); + + /* Set the error flag for this CPU and skip the faulting instruction. */ + cpumask_set_cpu(cpu, &debug_err_mask); + instruction_pointer(regs) += 4; + return 0; +} + +static struct undef_hook debug_reg_hook = { + .instr_mask = 0x0fe80f10, + .instr_val = 0x0e000e10, + .fn = debug_reg_trap, +}; + +static void reset_ctrl_regs(void *unused) +{ + int i, raw_num_brps, err = 0, cpu = smp_processor_id(); u32 dbg_power; - cpumask_t *cpumask = info; /* * v7 debug contains save and restore registers so that debug state @@ -848,38 +891,57 @@ static void reset_ctrl_regs(void *info) * Access Register to avoid taking undefined instruction exceptions * later on. */ - if (debug_arch >= ARM_DEBUG_ARCH_V7_ECP14) { + switch (debug_arch) { + case ARM_DEBUG_ARCH_V6: + case ARM_DEBUG_ARCH_V6_1: + /* ARMv6 cores just need to reset the registers. */ + goto reset_regs; + case ARM_DEBUG_ARCH_V7_ECP14: /* * Ensure sticky power-down is clear (i.e. debug logic is * powered up). */ asm volatile("mrc p14, 0, %0, c1, c5, 4" : "=r" (dbg_power)); - if ((dbg_power & 0x1) == 0) { - pr_warning("CPU %d debug is powered down!\n", cpu); - cpumask_or(cpumask, cpumask, cpumask_of(cpu)); - return; - } - + if ((dbg_power & 0x1) == 0) + err = -EPERM; + break; + case ARM_DEBUG_ARCH_V7_1: /* - * Unconditionally clear the lock by writing a value - * other than 0xC5ACCE55 to the access register. + * Ensure the OS double lock is clear. */ - asm volatile("mcr p14, 0, %0, c1, c0, 4" : : "r" (0)); - isb(); + asm volatile("mrc p14, 0, %0, c1, c3, 4" : "=r" (dbg_power)); + if ((dbg_power & 0x1) == 1) + err = -EPERM; + break; + } - /* - * Clear any configured vector-catch events before - * enabling monitor mode. - */ - asm volatile("mcr p14, 0, %0, c0, c7, 0" : : "r" (0)); - isb(); + if (err) { + pr_warning("CPU %d debug is powered down!\n", cpu); + cpumask_or(&debug_err_mask, &debug_err_mask, cpumask_of(cpu)); + return; } + /* + * Unconditionally clear the lock by writing a value + * other than 0xC5ACCE55 to the access register. + */ + asm volatile("mcr p14, 0, %0, c1, c0, 4" : : "r" (0)); + isb(); + + /* + * Clear any configured vector-catch events before + * enabling monitor mode. + */ + asm volatile("mcr p14, 0, %0, c0, c7, 0" : : "r" (0)); + isb(); + +reset_regs: if (enable_monitor_mode()) return; /* We must also reset any reserved registers. */ - for (i = 0; i < core_num_brps + core_num_reserved_brps; ++i) { + raw_num_brps = get_num_brp_resources(); + for (i = 0; i < raw_num_brps; ++i) { write_wb_reg(ARM_BASE_BCR + i, 0UL); write_wb_reg(ARM_BASE_BVR + i, 0UL); } @@ -895,6 +957,7 @@ static int __cpuinit dbg_reset_notify(struct notifier_block *self, { if (action == CPU_ONLINE) smp_call_function_single((int)cpu, reset_ctrl_regs, NULL, 1); + return NOTIFY_OK; } @@ -905,7 +968,6 @@ static struct notifier_block __cpuinitdata dbg_reset_nb = { static int __init arch_hw_breakpoint_init(void) { u32 dscr; - cpumask_t cpumask = { CPU_BITS_NONE }; debug_arch = get_debug_arch(); @@ -916,28 +978,31 @@ static int __init arch_hw_breakpoint_init(void) /* Determine how many BRPs/WRPs are available. */ core_num_brps = get_num_brps(); - core_num_reserved_brps = get_num_reserved_brps(); core_num_wrps = get_num_wrps(); - pr_info("found %d breakpoint and %d watchpoint registers.\n", - core_num_brps + core_num_reserved_brps, core_num_wrps); - - if (core_num_reserved_brps) - pr_info("%d breakpoint(s) reserved for watchpoint " - "single-step.\n", core_num_reserved_brps); + /* + * We need to tread carefully here because DBGSWENABLE may be + * driven low on this core and there isn't an architected way to + * determine that. + */ + register_undef_hook(&debug_reg_hook); /* * Reset the breakpoint resources. We assume that a halting * debugger will leave the world in a nice state for us. */ - on_each_cpu(reset_ctrl_regs, &cpumask, 1); - if (!cpumask_empty(&cpumask)) { + on_each_cpu(reset_ctrl_regs, NULL, 1); + unregister_undef_hook(&debug_reg_hook); + if (!cpumask_empty(&debug_err_mask)) { core_num_brps = 0; - core_num_reserved_brps = 0; core_num_wrps = 0; return 0; } + pr_info("found %d " "%s" "breakpoint and %d watchpoint registers.\n", + core_num_brps, core_has_mismatch_brps() ? "(+1 reserved) " : + "", core_num_wrps); + ARM_DBG_READ(c1, 0, dscr); if (dscr & ARM_DSCR_HDBGEN) { max_watchpoint_len = 4; diff --git a/arch/arm/kernel/irq.c b/arch/arm/kernel/irq.c index 53919b230e8..7cb29261249 100644 --- a/arch/arm/kernel/irq.c +++ b/arch/arm/kernel/irq.c @@ -59,9 +59,6 @@ int arch_show_interrupts(struct seq_file *p, int prec) #ifdef CONFIG_SMP show_ipi_list(p, prec); #endif -#ifdef CONFIG_LOCAL_TIMERS - show_local_irqs(p, prec); -#endif seq_printf(p, "%*s: %10lu\n", prec, "Err", irq_err_count); return 0; } diff --git a/arch/arm/kernel/kprobes-arm.c b/arch/arm/kernel/kprobes-arm.c index 79203ee1d03..9fe8910308a 100644 --- a/arch/arm/kernel/kprobes-arm.c +++ b/arch/arm/kernel/kprobes-arm.c @@ -60,6 +60,7 @@ #include <linux/kernel.h> #include <linux/kprobes.h> +#include <linux/module.h> #include "kprobes.h" @@ -971,6 +972,9 @@ const union decode_item kprobe_decode_arm_table[] = { DECODE_END }; +#ifdef CONFIG_ARM_KPROBES_TEST_MODULE +EXPORT_SYMBOL_GPL(kprobe_decode_arm_table); +#endif static void __kprobes arm_singlestep(struct kprobe *p, struct pt_regs *regs) { diff --git a/arch/arm/kernel/kprobes-test-arm.c b/arch/arm/kernel/kprobes-test-arm.c new file mode 100644 index 00000000000..fc82de8bdcc --- /dev/null +++ b/arch/arm/kernel/kprobes-test-arm.c @@ -0,0 +1,1323 @@ +/* + * arch/arm/kernel/kprobes-test-arm.c + * + * Copyright (C) 2011 Jon Medhurst <tixy@yxit.co.uk>. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + */ + +#include <linux/kernel.h> +#include <linux/module.h> + +#include "kprobes-test.h" + + +#define TEST_ISA "32" + +#define TEST_ARM_TO_THUMB_INTERWORK_R(code1, reg, val, code2) \ + TESTCASE_START(code1 #reg code2) \ + TEST_ARG_REG(reg, val) \ + TEST_ARG_REG(14, 99f) \ + TEST_ARG_END("") \ + "50: nop \n\t" \ + "1: "code1 #reg code2" \n\t" \ + " bx lr \n\t" \ + ".thumb \n\t" \ + "3: adr lr, 2f \n\t" \ + " bx lr \n\t" \ + ".arm \n\t" \ + "2: nop \n\t" \ + TESTCASE_END + +#define TEST_ARM_TO_THUMB_INTERWORK_P(code1, reg, val, code2) \ + TESTCASE_START(code1 #reg code2) \ + TEST_ARG_PTR(reg, val) \ + TEST_ARG_REG(14, 99f) \ + TEST_ARG_MEM(15, 3f+1) \ + TEST_ARG_END("") \ + "50: nop \n\t" \ + "1: "code1 #reg code2" \n\t" \ + " bx lr \n\t" \ + ".thumb \n\t" \ + "3: adr lr, 2f \n\t" \ + " bx lr \n\t" \ + ".arm \n\t" \ + "2: nop \n\t" \ + TESTCASE_END + + +void kprobe_arm_test_cases(void) +{ + kprobe_test_flags = 0; + + TEST_GROUP("Data-processing (register), (register-shifted register), (immediate)") + +#define _DATA_PROCESSING_DNM(op,s,val) \ + TEST_RR( op "eq" s " r0, r",1, VAL1,", r",2, val, "") \ + TEST_RR( op "ne" s " r1, r",1, VAL1,", r",2, val, ", lsl #3") \ + TEST_RR( op "cs" s " r2, r",3, VAL1,", r",2, val, ", lsr #4") \ + TEST_RR( op "cc" s " r3, r",3, VAL1,", r",2, val, ", asr #5") \ + TEST_RR( op "mi" s " r4, r",5, VAL1,", r",2, N(val),", asr #6") \ + TEST_RR( op "pl" s " r5, r",5, VAL1,", r",2, val, ", ror #7") \ + TEST_RR( op "vs" s " r6, r",7, VAL1,", r",2, val, ", rrx") \ + TEST_R( op "vc" s " r6, r",7, VAL1,", pc, lsl #3") \ + TEST_R( op "vc" s " r6, r",7, VAL1,", sp, lsr #4") \ + TEST_R( op "vc" s " r6, pc, r",7, VAL1,", asr #5") \ + TEST_R( op "vc" s " r6, sp, r",7, VAL1,", ror #6") \ + TEST_RRR( op "hi" s " r8, r",9, VAL1,", r",14,val, ", lsl r",0, 3,"")\ + TEST_RRR( op "ls" s " r9, r",9, VAL1,", r",14,val, ", lsr r",7, 4,"")\ + TEST_RRR( op "ge" s " r10, r",11,VAL1,", r",14,val, ", asr r",7, 5,"")\ + TEST_RRR( op "lt" s " r11, r",11,VAL1,", r",14,N(val),", asr r",7, 6,"")\ + TEST_RR( op "gt" s " r12, r13" ", r",14,val, ", ror r",14,7,"")\ + TEST_RR( op "le" s " r14, r",0, val, ", r13" ", lsl r",14,8,"")\ + TEST_RR( op s " r12, pc" ", r",14,val, ", ror r",14,7,"")\ + TEST_RR( op s " r14, r",0, val, ", pc" ", lsl r",14,8,"")\ + TEST_R( op "eq" s " r0, r",11,VAL1,", #0xf5") \ + TEST_R( op "ne" s " r11, r",0, VAL1,", #0xf5000000") \ + TEST_R( op s " r7, r",8, VAL2,", #0x000af000") \ + TEST( op s " r4, pc" ", #0x00005a00") + +#define DATA_PROCESSING_DNM(op,val) \ + _DATA_PROCESSING_DNM(op,"",val) \ + _DATA_PROCESSING_DNM(op,"s",val) + +#define DATA_PROCESSING_NM(op,val) \ + TEST_RR( op "ne r",1, VAL1,", r",2, val, "") \ + TEST_RR( op "eq r",1, VAL1,", r",2, val, ", lsl #3") \ + TEST_RR( op "cc r",3, VAL1,", r",2, val, ", lsr #4") \ + TEST_RR( op "cs r",3, VAL1,", r",2, val, ", asr #5") \ + TEST_RR( op "pl r",5, VAL1,", r",2, N(val),", asr #6") \ + TEST_RR( op "mi r",5, VAL1,", r",2, val, ", ror #7") \ + TEST_RR( op "vc r",7, VAL1,", r",2, val, ", rrx") \ + TEST_R ( op "vs r",7, VAL1,", pc, lsl #3") \ + TEST_R ( op "vs r",7, VAL1,", sp, lsr #4") \ + TEST_R( op "vs pc, r",7, VAL1,", asr #5") \ + TEST_R( op "vs sp, r",7, VAL1,", ror #6") \ + TEST_RRR( op "ls r",9, VAL1,", r",14,val, ", lsl r",0, 3,"") \ + TEST_RRR( op "hi r",9, VAL1,", r",14,val, ", lsr r",7, 4,"") \ + TEST_RRR( op "lt r",11,VAL1,", r",14,val, ", asr r",7, 5,"") \ + TEST_RRR( op "ge r",11,VAL1,", r",14,N(val),", asr r",7, 6,"") \ + TEST_RR( op "le r13" ", r",14,val, ", ror r",14,7,"") \ + TEST_RR( op "gt r",0, val, ", r13" ", lsl r",14,8,"") \ + TEST_RR( op " pc" ", r",14,val, ", ror r",14,7,"") \ + TEST_RR( op " r",0, val, ", pc" ", lsl r",14,8,"") \ + TEST_R( op "eq r",11,VAL1,", #0xf5") \ + TEST_R( op "ne r",0, VAL1,", #0xf5000000") \ + TEST_R( op " r",8, VAL2,", #0x000af000") + +#define _DATA_PROCESSING_DM(op,s,val) \ + TEST_R( op "eq" s " r0, r",1, val, "") \ + TEST_R( op "ne" s " r1, r",1, val, ", lsl #3") \ + TEST_R( op "cs" s " r2, r",3, val, ", lsr #4") \ + TEST_R( op "cc" s " r3, r",3, val, ", asr #5") \ + TEST_R( op "mi" s " r4, r",5, N(val),", asr #6") \ + TEST_R( op "pl" s " r5, r",5, val, ", ror #7") \ + TEST_R( op "vs" s " r6, r",10,val, ", rrx") \ + TEST( op "vs" s " r7, pc, lsl #3") \ + TEST( op "vs" s " r7, sp, lsr #4") \ + TEST_RR( op "vc" s " r8, r",7, val, ", lsl r",0, 3,"") \ + TEST_RR( op "hi" s " r9, r",9, val, ", lsr r",7, 4,"") \ + TEST_RR( op "ls" s " r10, r",9, val, ", asr r",7, 5,"") \ + TEST_RR( op "ge" s " r11, r",11,N(val),", asr r",7, 6,"") \ + TEST_RR( op "lt" s " r12, r",11,val, ", ror r",14,7,"") \ + TEST_R( op "gt" s " r14, r13" ", lsl r",14,8,"") \ + TEST_R( op "le" s " r14, pc" ", lsl r",14,8,"") \ + TEST( op "eq" s " r0, #0xf5") \ + TEST( op "ne" s " r11, #0xf5000000") \ + TEST( op s " r7, #0x000af000") \ + TEST( op s " r4, #0x00005a00") + +#define DATA_PROCESSING_DM(op,val) \ + _DATA_PROCESSING_DM(op,"",val) \ + _DATA_PROCESSING_DM(op,"s",val) + + DATA_PROCESSING_DNM("and",0xf00f00ff) + DATA_PROCESSING_DNM("eor",0xf00f00ff) + DATA_PROCESSING_DNM("sub",VAL2) + DATA_PROCESSING_DNM("rsb",VAL2) + DATA_PROCESSING_DNM("add",VAL2) + DATA_PROCESSING_DNM("adc",VAL2) + DATA_PROCESSING_DNM("sbc",VAL2) + DATA_PROCESSING_DNM("rsc",VAL2) + DATA_PROCESSING_NM("tst",0xf00f00ff) + DATA_PROCESSING_NM("teq",0xf00f00ff) + DATA_PROCESSING_NM("cmp",VAL2) + DATA_PROCESSING_NM("cmn",VAL2) + DATA_PROCESSING_DNM("orr",0xf00f00ff) + DATA_PROCESSING_DM("mov",VAL2) + DATA_PROCESSING_DNM("bic",0xf00f00ff) + DATA_PROCESSING_DM("mvn",VAL2) + + TEST("mov ip, sp") /* This has special case emulation code */ + + TEST_SUPPORTED("mov pc, #0x1000"); + TEST_SUPPORTED("mov sp, #0x1000"); + TEST_SUPPORTED("cmp pc, #0x1000"); + TEST_SUPPORTED("cmp sp, #0x1000"); + + /* Data-processing with PC as shift*/ + TEST_UNSUPPORTED(".word 0xe15c0f1e @ cmp r12, r14, asl pc") + TEST_UNSUPPORTED(".word 0xe1a0cf1e @ mov r12, r14, asl pc") + TEST_UNSUPPORTED(".word 0xe08caf1e @ add r10, r12, r14, asl pc") + + /* Data-processing with PC as shift*/ + TEST_UNSUPPORTED("movs pc, r1") + TEST_UNSUPPORTED("movs pc, r1, lsl r2") + TEST_UNSUPPORTED("movs pc, #0x10000") + TEST_UNSUPPORTED("adds pc, lr, r1") + TEST_UNSUPPORTED("adds pc, lr, r1, lsl r2") + TEST_UNSUPPORTED("adds pc, lr, #4") + + /* Data-processing with SP as target */ + TEST("add sp, sp, #16") + TEST("sub sp, sp, #8") + TEST("bic sp, sp, #0x20") + TEST("orr sp, sp, #0x20") + TEST_PR( "add sp, r",10,0,", r",11,4,"") + TEST_PRR("add sp, r",10,0,", r",11,4,", asl r",12,1,"") + TEST_P( "mov sp, r",10,0,"") + TEST_PR( "mov sp, r",10,0,", asl r",12,0,"") + + /* Data-processing with PC as target */ + TEST_BF( "add pc, pc, #2f-1b-8") + TEST_BF_R ("add pc, pc, r",14,2f-1f-8,"") + TEST_BF_R ("add pc, r",14,2f-1f-8,", pc") + TEST_BF_R ("mov pc, r",0,2f,"") + TEST_BF_RR("mov pc, r",0,2f,", asl r",1,0,"") + TEST_BB( "sub pc, pc, #1b-2b+8") +#if __LINUX_ARM_ARCH__ >= 6 + TEST_BB( "sub pc, pc, #1b-2b+8-2") /* UNPREDICTABLE before ARMv6 */ +#endif + TEST_BB_R( "sub pc, pc, r",14, 1f-2f+8,"") + TEST_BB_R( "rsb pc, r",14,1f-2f+8,", pc") + TEST_RR( "add pc, pc, r",10,-2,", asl r",11,1,"") +#ifdef CONFIG_THUMB2_KERNEL + TEST_ARM_TO_THUMB_INTERWORK_R("add pc, pc, r",0,3f-1f-8+1,"") + TEST_ARM_TO_THUMB_INTERWORK_R("sub pc, r",0,3f+8+1,", #8") +#endif + TEST_GROUP("Miscellaneous instructions") + + TEST("mrs r0, cpsr") + TEST("mrspl r7, cpsr") + TEST("mrs r14, cpsr") + TEST_UNSUPPORTED(".word 0xe10ff000 @ mrs r15, cpsr") + TEST_UNSUPPORTED("mrs r0, spsr") + TEST_UNSUPPORTED("mrs lr, spsr") + + TEST_UNSUPPORTED("msr cpsr, r0") + TEST_UNSUPPORTED("msr cpsr_f, lr") + TEST_UNSUPPORTED("msr spsr, r0") + + TEST_BF_R("bx r",0,2f,"") + TEST_BB_R("bx r",7,2f,"") + TEST_BF_R("bxeq r",14,2f,"") + + TEST_R("clz r0, r",0, 0x0,"") + TEST_R("clzeq r7, r",14,0x1,"") + TEST_R("clz lr, r",7, 0xffffffff,"") + TEST( "clz r4, sp") + TEST_UNSUPPORTED(".word 0x016fff10 @ clz pc, r0") + TEST_UNSUPPORTED(".word 0x016f0f1f @ clz r0, pc") + +#if __LINUX_ARM_ARCH__ >= 6 + TEST_UNSUPPORTED("bxj r0") +#endif + + TEST_BF_R("blx r",0,2f,"") + TEST_BB_R("blx r",7,2f,"") + TEST_BF_R("blxeq r",14,2f,"") + TEST_UNSUPPORTED(".word 0x0120003f @ blx pc") + + TEST_RR( "qadd r0, r",1, VAL1,", r",2, VAL2,"") + TEST_RR( "qaddvs lr, r",9, VAL2,", r",8, VAL1,"") + TEST_R( "qadd lr, r",9, VAL2,", r13") + TEST_RR( "qsub r0, r",1, VAL1,", r",2, VAL2,"") + TEST_RR( "qsubvs lr, r",9, VAL2,", r",8, VAL1,"") + TEST_R( "qsub lr, r",9, VAL2,", r13") + TEST_RR( "qdadd r0, r",1, VAL1,", r",2, VAL2,"") + TEST_RR( "qdaddvs lr, r",9, VAL2,", r",8, VAL1,"") + TEST_R( "qdadd lr, r",9, VAL2,", r13") + TEST_RR( "qdsub r0, r",1, VAL1,", r",2, VAL2,"") + TEST_RR( "qdsubvs lr, r",9, VAL2,", r",8, VAL1,"") + TEST_R( "qdsub lr, r",9, VAL2,", r13") + TEST_UNSUPPORTED(".word 0xe101f050 @ qadd pc, r0, r1") + TEST_UNSUPPORTED(".word 0xe121f050 @ qsub pc, r0, r1") + TEST_UNSUPPORTED(".word 0xe141f050 @ qdadd pc, r0, r1") + TEST_UNSUPPORTED(".word 0xe161f050 @ qdsub pc, r0, r1") + TEST_UNSUPPORTED(".word 0xe16f2050 @ qdsub r2, r0, pc") + TEST_UNSUPPORTED(".word 0xe161205f @ qdsub r2, pc, r1") + + TEST_UNSUPPORTED("bkpt 0xffff") + TEST_UNSUPPORTED("bkpt 0x0000") + + TEST_UNSUPPORTED(".word 0xe1600070 @ smc #0") + + TEST_GROUP("Halfword multiply and multiply-accumulate") + + TEST_RRR( "smlabb r0, r",1, VAL1,", r",2, VAL2,", r",3, VAL3,"") + TEST_RRR( "smlabbge r7, r",8, VAL3,", r",9, VAL1,", r",10, VAL2,"") + TEST_RR( "smlabb lr, r",1, VAL2,", r",2, VAL3,", r13") + TEST_UNSUPPORTED(".word 0xe10f3281 @ smlabb pc, r1, r2, r3") + TEST_RRR( "smlatb r0, r",1, VAL1,", r",2, VAL2,", r",3, VAL3,"") + TEST_RRR( "smlatbge r7, r",8, VAL3,", r",9, VAL1,", r",10, VAL2,"") + TEST_RR( "smlatb lr, r",1, VAL2,", r",2, VAL3,", r13") + TEST_UNSUPPORTED(".word 0xe10f32a1 @ smlatb pc, r1, r2, r3") + TEST_RRR( "smlabt r0, r",1, VAL1,", r",2, VAL2,", r",3, VAL3,"") + TEST_RRR( "smlabtge r7, r",8, VAL3,", r",9, VAL1,", r",10, VAL2,"") + TEST_RR( "smlabt lr, r",1, VAL2,", r",2, VAL3,", r13") + TEST_UNSUPPORTED(".word 0xe10f32c1 @ smlabt pc, r1, r2, r3") + TEST_RRR( "smlatt r0, r",1, VAL1,", r",2, VAL2,", r",3, VAL3,"") + TEST_RRR( "smlattge r7, r",8, VAL3,", r",9, VAL1,", r",10, VAL2,"") + TEST_RR( "smlatt lr, r",1, VAL2,", r",2, VAL3,", r13") + TEST_UNSUPPORTED(".word 0xe10f32e1 @ smlatt pc, r1, r2, r3") + + TEST_RRR( "smlawb r0, r",1, VAL1,", r",2, VAL2,", r",3, VAL3,"") + TEST_RRR( "smlawbge r7, r",8, VAL3,", r",9, VAL1,", r",10, VAL2,"") + TEST_RR( "smlawb lr, r",1, VAL2,", r",2, VAL3,", r13") + TEST_UNSUPPORTED(".word 0xe12f3281 @ smlawb pc, r1, r2, r3") + TEST_RRR( "smlawt r0, r",1, VAL1,", r",2, VAL2,", r",3, VAL3,"") + TEST_RRR( "smlawtge r7, r",8, VAL3,", r",9, VAL1,", r",10, VAL2,"") + TEST_RR( "smlawt lr, r",1, VAL2,", r",2, VAL3,", r13") + TEST_UNSUPPORTED(".word 0xe12f32c1 @ smlawt pc, r1, r2, r3") + TEST_UNSUPPORTED(".word 0xe12032cf @ smlawt r0, pc, r2, r3") + TEST_UNSUPPORTED(".word 0xe1203fc1 @ smlawt r0, r1, pc, r3") + TEST_UNSUPPORTED(".word 0xe120f2c1 @ smlawt r0, r1, r2, pc") + + TEST_RR( "smulwb r0, r",1, VAL1,", r",2, VAL2,"") + TEST_RR( "smulwbge r7, r",8, VAL3,", r",9, VAL1,"") + TEST_R( "smulwb lr, r",1, VAL2,", r13") + TEST_UNSUPPORTED(".word 0xe12f02a1 @ smulwb pc, r1, r2") + TEST_RR( "smulwt r0, r",1, VAL1,", r",2, VAL2,"") + TEST_RR( "smulwtge r7, r",8, VAL3,", r",9, VAL1,"") + TEST_R( "smulwt lr, r",1, VAL2,", r13") + TEST_UNSUPPORTED(".word 0xe12f02e1 @ smulwt pc, r1, r2") + + TEST |