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ANDROID: fiq_debugger: split arm support into fiq_debugger_arm.c
Split arm support into a separate .c file that is only built for CONFIG_ARM. Change-Id: Iba16f4d51608bf9c3e5c8acefefcd38fead9797c Signed-off-by: Colin Cross <ccross@android.com>
This commit is contained in:
Colin Cross
committed by
Dmitry Shmidt
Dmitry Shmidt
parent
7efcbb80ef
commit
cffbe78e01
@@ -1 +1,2 @@
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obj-y += fiq_debugger.o
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obj-$(CONFIG_ARM) += fiq_debugger_arm.o
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@@ -38,11 +38,11 @@
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#ifdef CONFIG_FIQ_GLUE
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#include <asm/fiq_glue.h>
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#endif
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#include <asm/stacktrace.h>
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#include <linux/uaccess.h>
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#include "fiq_debugger.h"
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#include "fiq_debugger_priv.h"
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#include "fiq_debugger_ringbuf.h"
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#define DEBUG_MAX 64
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@@ -50,9 +50,6 @@
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#define MAX_FIQ_DEBUGGER_PORTS 4
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#define THREAD_INFO(sp) ((struct thread_info *) \
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((unsigned long)(sp) & ~(THREAD_SIZE - 1)))
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struct fiq_debugger_state {
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#ifdef CONFIG_FIQ_GLUE
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struct fiq_glue_handler handler;
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@@ -232,21 +229,7 @@ static void fiq_debugger_dump_kernel_log(struct fiq_debugger_state *state)
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}
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}
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static char *mode_name(unsigned cpsr)
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{
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switch (cpsr & MODE_MASK) {
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case USR_MODE: return "USR";
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case FIQ_MODE: return "FIQ";
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case IRQ_MODE: return "IRQ";
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case SVC_MODE: return "SVC";
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case ABT_MODE: return "ABT";
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case UND_MODE: return "UND";
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case SYSTEM_MODE: return "SYS";
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default: return "???";
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}
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}
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static int fiq_debugger_printf(void *cookie, const char *fmt, ...)
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int fiq_debugger_printf(void *cookie, const char *fmt, ...)
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{
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struct fiq_debugger_state *state = cookie;
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char buf[256];
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@@ -279,112 +262,6 @@ static int fiq_debugger_printf_nfiq(void *cookie, const char *fmt, ...)
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return state->debug_abort;
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}
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static void fiq_debugger_dump_regs(struct fiq_debugger_state *state,
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const struct pt_regs *regs)
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{
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fiq_debugger_printf(state,
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" r0 %08x r1 %08x r2 %08x r3 %08x\n",
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regs->ARM_r0, regs->ARM_r1, regs->ARM_r2, regs->ARM_r3);
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fiq_debugger_printf(state,
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" r4 %08x r5 %08x r6 %08x r7 %08x\n",
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regs->ARM_r4, regs->ARM_r5, regs->ARM_r6, regs->ARM_r7);
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fiq_debugger_printf(state,
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" r8 %08x r9 %08x r10 %08x r11 %08x mode %s\n",
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regs->ARM_r8, regs->ARM_r9, regs->ARM_r10, regs->ARM_fp,
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mode_name(regs->ARM_cpsr));
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fiq_debugger_printf(state,
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" ip %08x sp %08x lr %08x pc %08x cpsr %08x\n",
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regs->ARM_ip, regs->ARM_sp, regs->ARM_lr, regs->ARM_pc,
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regs->ARM_cpsr);
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}
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struct mode_regs {
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unsigned long sp_svc;
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unsigned long lr_svc;
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unsigned long spsr_svc;
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unsigned long sp_abt;
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unsigned long lr_abt;
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unsigned long spsr_abt;
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unsigned long sp_und;
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unsigned long lr_und;
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unsigned long spsr_und;
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unsigned long sp_irq;
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unsigned long lr_irq;
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unsigned long spsr_irq;
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unsigned long r8_fiq;
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unsigned long r9_fiq;
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unsigned long r10_fiq;
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unsigned long r11_fiq;
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unsigned long r12_fiq;
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unsigned long sp_fiq;
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unsigned long lr_fiq;
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unsigned long spsr_fiq;
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};
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void __naked get_mode_regs(struct mode_regs *regs)
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{
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asm volatile (
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"mrs r1, cpsr\n"
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"msr cpsr_c, #0xd3 @(SVC_MODE | PSR_I_BIT | PSR_F_BIT)\n"
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"stmia r0!, {r13 - r14}\n"
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"mrs r2, spsr\n"
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"msr cpsr_c, #0xd7 @(ABT_MODE | PSR_I_BIT | PSR_F_BIT)\n"
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"stmia r0!, {r2, r13 - r14}\n"
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"mrs r2, spsr\n"
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"msr cpsr_c, #0xdb @(UND_MODE | PSR_I_BIT | PSR_F_BIT)\n"
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"stmia r0!, {r2, r13 - r14}\n"
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"mrs r2, spsr\n"
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"msr cpsr_c, #0xd2 @(IRQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
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"stmia r0!, {r2, r13 - r14}\n"
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"mrs r2, spsr\n"
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"msr cpsr_c, #0xd1 @(FIQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
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"stmia r0!, {r2, r8 - r14}\n"
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"mrs r2, spsr\n"
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"stmia r0!, {r2}\n"
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"msr cpsr_c, r1\n"
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"bx lr\n");
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}
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static void fiq_debugger_dump_allregs(struct fiq_debugger_state *state,
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const struct pt_regs *regs)
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{
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struct mode_regs mode_regs;
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unsigned long mode = regs->ARM_cpsr & MODE_MASK;
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fiq_debugger_dump_regs(state, regs);
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get_mode_regs(&mode_regs);
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fiq_debugger_printf(state,
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"%csvc: sp %08x lr %08x spsr %08x\n",
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mode == SVC_MODE ? '*' : ' ',
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mode_regs.sp_svc, mode_regs.lr_svc, mode_regs.spsr_svc);
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fiq_debugger_printf(state,
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"%cabt: sp %08x lr %08x spsr %08x\n",
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mode == ABT_MODE ? '*' : ' ',
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mode_regs.sp_abt, mode_regs.lr_abt, mode_regs.spsr_abt);
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fiq_debugger_printf(state,
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"%cund: sp %08x lr %08x spsr %08x\n",
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mode == UND_MODE ? '*' : ' ',
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mode_regs.sp_und, mode_regs.lr_und, mode_regs.spsr_und);
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fiq_debugger_printf(state,
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"%cirq: sp %08x lr %08x spsr %08x\n",
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mode == IRQ_MODE ? '*' : ' ',
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mode_regs.sp_irq, mode_regs.lr_irq, mode_regs.spsr_irq);
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fiq_debugger_printf(state,
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"%cfiq: r8 %08x r9 %08x r10 %08x r11 %08x r12 %08x\n",
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mode == FIQ_MODE ? '*' : ' ',
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mode_regs.r8_fiq, mode_regs.r9_fiq, mode_regs.r10_fiq,
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mode_regs.r11_fiq, mode_regs.r12_fiq);
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fiq_debugger_printf(state,
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" fiq: sp %08x lr %08x spsr %08x\n",
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mode_regs.sp_fiq, mode_regs.lr_fiq, mode_regs.spsr_fiq);
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}
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static void fiq_debugger_dump_irqs(struct fiq_debugger_state *state)
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{
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int n;
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@@ -405,98 +282,6 @@ static void fiq_debugger_dump_irqs(struct fiq_debugger_state *state)
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}
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}
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struct stacktrace_state {
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struct fiq_debugger_state *state;
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unsigned int depth;
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};
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static int report_trace(struct stackframe *frame, void *d)
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{
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struct stacktrace_state *sts = d;
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if (sts->depth) {
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fiq_debugger_printf(sts->state,
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" pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
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frame->pc, frame->pc, frame->lr, frame->lr,
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frame->sp, frame->fp);
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sts->depth--;
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return 0;
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}
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fiq_debugger_printf(sts->state, " ...\n");
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return sts->depth == 0;
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}
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struct frame_tail {
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struct frame_tail *fp;
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unsigned long sp;
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unsigned long lr;
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} __attribute__((packed));
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static struct frame_tail *user_backtrace(struct fiq_debugger_state *state,
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struct frame_tail *tail)
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{
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struct frame_tail buftail[2];
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/* Also check accessibility of one struct frame_tail beyond */
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if (!access_ok(VERIFY_READ, tail, sizeof(buftail))) {
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fiq_debugger_printf(state, " invalid frame pointer %p\n",
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tail);
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return NULL;
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}
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if (__copy_from_user_inatomic(buftail, tail, sizeof(buftail))) {
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fiq_debugger_printf(state,
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" failed to copy frame pointer %p\n", tail);
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return NULL;
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}
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fiq_debugger_printf(state, " %p\n", buftail[0].lr);
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/* frame pointers should strictly progress back up the stack
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* (towards higher addresses) */
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if (tail >= buftail[0].fp)
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return NULL;
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return buftail[0].fp-1;
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}
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void fiq_debugger_dump_stacktrace(struct fiq_debugger_state *state,
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const struct pt_regs *regs, unsigned int depth, void *ssp)
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{
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struct frame_tail *tail;
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struct thread_info *real_thread_info = THREAD_INFO(ssp);
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struct stacktrace_state sts;
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sts.depth = depth;
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sts.state = state;
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*current_thread_info() = *real_thread_info;
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if (!current)
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fiq_debugger_printf(state, "current NULL\n");
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else
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fiq_debugger_printf(state, "pid: %d comm: %s\n",
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current->pid, current->comm);
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fiq_debugger_dump_regs(state, regs);
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if (!user_mode(regs)) {
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struct stackframe frame;
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frame.fp = regs->ARM_fp;
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frame.sp = regs->ARM_sp;
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frame.lr = regs->ARM_lr;
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frame.pc = regs->ARM_pc;
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fiq_debugger_printf(state,
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" pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
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regs->ARM_pc, regs->ARM_pc, regs->ARM_lr, regs->ARM_lr,
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regs->ARM_sp, regs->ARM_fp);
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walk_stackframe(&frame, report_trace, &sts);
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return;
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}
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tail = ((struct frame_tail *) regs->ARM_fp) - 1;
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while (depth-- && tail && !((unsigned long) tail & 3))
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tail = user_backtrace(state, tail);
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}
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static void fiq_debugger_do_ps(struct fiq_debugger_state *state)
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{
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struct task_struct *g;
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@@ -692,9 +477,7 @@ static bool fiq_debugger_fiq_exec(struct fiq_debugger_state *state,
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if (!strcmp(cmd, "help") || !strcmp(cmd, "?")) {
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fiq_debugger_help(state);
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} else if (!strcmp(cmd, "pc")) {
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fiq_debugger_printf(state, " pc %08x cpsr %08x mode %s\n",
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regs->ARM_pc, regs->ARM_cpsr,
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mode_name(regs->ARM_cpsr));
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fiq_debugger_dump_pc(state, regs);
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} else if (!strcmp(cmd, "regs")) {
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fiq_debugger_dump_regs(state, regs);
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} else if (!strcmp(cmd, "allregs")) {
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240
drivers/staging/android/fiq_debugger/fiq_debugger_arm.c
Normal file
240
drivers/staging/android/fiq_debugger/fiq_debugger_arm.c
Normal file
@@ -0,0 +1,240 @@
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/*
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* Copyright (C) 2014 Google, Inc.
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* Author: Colin Cross <ccross@android.com>
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*
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* This software is licensed under the terms of the GNU General Public
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* License version 2, as published by the Free Software Foundation, and
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* may be copied, distributed, and modified under those terms.
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*
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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* GNU General Public License for more details.
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*
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*/
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#include <linux/ptrace.h>
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#include <linux/uaccess.h>
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#include <asm/stacktrace.h>
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#include "fiq_debugger_priv.h"
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static char *mode_name(unsigned cpsr)
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{
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switch (cpsr & MODE_MASK) {
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case USR_MODE: return "USR";
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case FIQ_MODE: return "FIQ";
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case IRQ_MODE: return "IRQ";
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case SVC_MODE: return "SVC";
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case ABT_MODE: return "ABT";
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case UND_MODE: return "UND";
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case SYSTEM_MODE: return "SYS";
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default: return "???";
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}
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}
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void fiq_debugger_dump_pc(struct fiq_debugger_state *state,
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const struct pt_regs *regs)
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{
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fiq_debugger_printf(state, " pc %08x cpsr %08x mode %s\n",
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regs->ARM_pc, regs->ARM_cpsr, mode_name(regs->ARM_cpsr));
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}
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void fiq_debugger_dump_regs(struct fiq_debugger_state *state,
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const struct pt_regs *regs)
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{
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fiq_debugger_printf(state,
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" r0 %08x r1 %08x r2 %08x r3 %08x\n",
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regs->ARM_r0, regs->ARM_r1, regs->ARM_r2, regs->ARM_r3);
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fiq_debugger_printf(state,
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" r4 %08x r5 %08x r6 %08x r7 %08x\n",
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regs->ARM_r4, regs->ARM_r5, regs->ARM_r6, regs->ARM_r7);
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fiq_debugger_printf(state,
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" r8 %08x r9 %08x r10 %08x r11 %08x mode %s\n",
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regs->ARM_r8, regs->ARM_r9, regs->ARM_r10, regs->ARM_fp,
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mode_name(regs->ARM_cpsr));
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fiq_debugger_printf(state,
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" ip %08x sp %08x lr %08x pc %08x cpsr %08x\n",
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regs->ARM_ip, regs->ARM_sp, regs->ARM_lr, regs->ARM_pc,
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regs->ARM_cpsr);
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}
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struct mode_regs {
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unsigned long sp_svc;
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unsigned long lr_svc;
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unsigned long spsr_svc;
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unsigned long sp_abt;
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unsigned long lr_abt;
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unsigned long spsr_abt;
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unsigned long sp_und;
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unsigned long lr_und;
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unsigned long spsr_und;
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unsigned long sp_irq;
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unsigned long lr_irq;
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unsigned long spsr_irq;
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unsigned long r8_fiq;
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unsigned long r9_fiq;
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unsigned long r10_fiq;
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unsigned long r11_fiq;
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unsigned long r12_fiq;
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unsigned long sp_fiq;
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unsigned long lr_fiq;
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unsigned long spsr_fiq;
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};
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static void __naked get_mode_regs(struct mode_regs *regs)
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{
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asm volatile (
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"mrs r1, cpsr\n"
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"msr cpsr_c, #0xd3 @(SVC_MODE | PSR_I_BIT | PSR_F_BIT)\n"
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"stmia r0!, {r13 - r14}\n"
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"mrs r2, spsr\n"
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"msr cpsr_c, #0xd7 @(ABT_MODE | PSR_I_BIT | PSR_F_BIT)\n"
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"stmia r0!, {r2, r13 - r14}\n"
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"mrs r2, spsr\n"
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"msr cpsr_c, #0xdb @(UND_MODE | PSR_I_BIT | PSR_F_BIT)\n"
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"stmia r0!, {r2, r13 - r14}\n"
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"mrs r2, spsr\n"
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"msr cpsr_c, #0xd2 @(IRQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
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"stmia r0!, {r2, r13 - r14}\n"
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"mrs r2, spsr\n"
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"msr cpsr_c, #0xd1 @(FIQ_MODE | PSR_I_BIT | PSR_F_BIT)\n"
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"stmia r0!, {r2, r8 - r14}\n"
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"mrs r2, spsr\n"
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"stmia r0!, {r2}\n"
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"msr cpsr_c, r1\n"
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"bx lr\n");
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}
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void fiq_debugger_dump_allregs(struct fiq_debugger_state *state,
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const struct pt_regs *regs)
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{
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struct mode_regs mode_regs;
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unsigned long mode = regs->ARM_cpsr & MODE_MASK;
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fiq_debugger_dump_regs(state, regs);
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get_mode_regs(&mode_regs);
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fiq_debugger_printf(state,
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"%csvc: sp %08x lr %08x spsr %08x\n",
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mode == SVC_MODE ? '*' : ' ',
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mode_regs.sp_svc, mode_regs.lr_svc, mode_regs.spsr_svc);
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fiq_debugger_printf(state,
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"%cabt: sp %08x lr %08x spsr %08x\n",
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mode == ABT_MODE ? '*' : ' ',
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mode_regs.sp_abt, mode_regs.lr_abt, mode_regs.spsr_abt);
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fiq_debugger_printf(state,
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||||
"%cund: sp %08x lr %08x spsr %08x\n",
|
||||
mode == UND_MODE ? '*' : ' ',
|
||||
mode_regs.sp_und, mode_regs.lr_und, mode_regs.spsr_und);
|
||||
fiq_debugger_printf(state,
|
||||
"%cirq: sp %08x lr %08x spsr %08x\n",
|
||||
mode == IRQ_MODE ? '*' : ' ',
|
||||
mode_regs.sp_irq, mode_regs.lr_irq, mode_regs.spsr_irq);
|
||||
fiq_debugger_printf(state,
|
||||
"%cfiq: r8 %08x r9 %08x r10 %08x r11 %08x r12 %08x\n",
|
||||
mode == FIQ_MODE ? '*' : ' ',
|
||||
mode_regs.r8_fiq, mode_regs.r9_fiq, mode_regs.r10_fiq,
|
||||
mode_regs.r11_fiq, mode_regs.r12_fiq);
|
||||
fiq_debugger_printf(state,
|
||||
" fiq: sp %08x lr %08x spsr %08x\n",
|
||||
mode_regs.sp_fiq, mode_regs.lr_fiq, mode_regs.spsr_fiq);
|
||||
}
|
||||
|
||||
struct stacktrace_state {
|
||||
struct fiq_debugger_state *state;
|
||||
unsigned int depth;
|
||||
};
|
||||
|
||||
static int report_trace(struct stackframe *frame, void *d)
|
||||
{
|
||||
struct stacktrace_state *sts = d;
|
||||
|
||||
if (sts->depth) {
|
||||
fiq_debugger_printf(sts->state,
|
||||
" pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
|
||||
frame->pc, frame->pc, frame->lr, frame->lr,
|
||||
frame->sp, frame->fp);
|
||||
sts->depth--;
|
||||
return 0;
|
||||
}
|
||||
fiq_debugger_printf(sts->state, " ...\n");
|
||||
|
||||
return sts->depth == 0;
|
||||
}
|
||||
|
||||
struct frame_tail {
|
||||
struct frame_tail *fp;
|
||||
unsigned long sp;
|
||||
unsigned long lr;
|
||||
} __attribute__((packed));
|
||||
|
||||
static struct frame_tail *user_backtrace(struct fiq_debugger_state *state,
|
||||
struct frame_tail *tail)
|
||||
{
|
||||
struct frame_tail buftail[2];
|
||||
|
||||
/* Also check accessibility of one struct frame_tail beyond */
|
||||
if (!access_ok(VERIFY_READ, tail, sizeof(buftail))) {
|
||||
fiq_debugger_printf(state, " invalid frame pointer %p\n",
|
||||
tail);
|
||||
return NULL;
|
||||
}
|
||||
if (__copy_from_user_inatomic(buftail, tail, sizeof(buftail))) {
|
||||
fiq_debugger_printf(state,
|
||||
" failed to copy frame pointer %p\n", tail);
|
||||
return NULL;
|
||||
}
|
||||
|
||||
fiq_debugger_printf(state, " %p\n", buftail[0].lr);
|
||||
|
||||
/* frame pointers should strictly progress back up the stack
|
||||
* (towards higher addresses) */
|
||||
if (tail >= buftail[0].fp)
|
||||
return NULL;
|
||||
|
||||
return buftail[0].fp-1;
|
||||
}
|
||||
|
||||
void fiq_debugger_dump_stacktrace(struct fiq_debugger_state *state,
|
||||
const struct pt_regs *regs, unsigned int depth, void *ssp)
|
||||
{
|
||||
struct frame_tail *tail;
|
||||
struct thread_info *real_thread_info = THREAD_INFO(ssp);
|
||||
struct stacktrace_state sts;
|
||||
|
||||
sts.depth = depth;
|
||||
sts.state = state;
|
||||
*current_thread_info() = *real_thread_info;
|
||||
|
||||
if (!current)
|
||||
fiq_debugger_printf(state, "current NULL\n");
|
||||
else
|
||||
fiq_debugger_printf(state, "pid: %d comm: %s\n",
|
||||
current->pid, current->comm);
|
||||
fiq_debugger_dump_regs(state, regs);
|
||||
|
||||
if (!user_mode(regs)) {
|
||||
struct stackframe frame;
|
||||
frame.fp = regs->ARM_fp;
|
||||
frame.sp = regs->ARM_sp;
|
||||
frame.lr = regs->ARM_lr;
|
||||
frame.pc = regs->ARM_pc;
|
||||
fiq_debugger_printf(state,
|
||||
" pc: %p (%pF), lr %p (%pF), sp %p, fp %p\n",
|
||||
regs->ARM_pc, regs->ARM_pc, regs->ARM_lr, regs->ARM_lr,
|
||||
regs->ARM_sp, regs->ARM_fp);
|
||||
walk_stackframe(&frame, report_trace, &sts);
|
||||
return;
|
||||
}
|
||||
|
||||
tail = ((struct frame_tail *) regs->ARM_fp) - 1;
|
||||
while (depth-- && tail && !((unsigned long) tail & 3))
|
||||
tail = user_backtrace(state, tail);
|
||||
}
|
||||
36
drivers/staging/android/fiq_debugger/fiq_debugger_priv.h
Normal file
36
drivers/staging/android/fiq_debugger/fiq_debugger_priv.h
Normal file
@@ -0,0 +1,36 @@
|
||||
/*
|
||||
* Copyright (C) 2014 Google, Inc.
|
||||
* Author: Colin Cross <ccross@android.com>
|
||||
*
|
||||
* This software is licensed under the terms of the GNU General Public
|
||||
* License version 2, as published by the Free Software Foundation, and
|
||||
* may be copied, distributed, and modified under those terms.
|
||||
*
|
||||
* This program is distributed in the hope that it will be useful,
|
||||
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||||
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||||
* GNU General Public License for more details.
|
||||
*
|
||||
*/
|
||||
|
||||
#ifndef _FIQ_DEBUGGER_PRIV_H_
|
||||
#define _FIQ_DEBUGGER_PRIV_H_
|
||||
|
||||
#define THREAD_INFO(sp) ((struct thread_info *) \
|
||||
((unsigned long)(sp) & ~(THREAD_SIZE - 1)))
|
||||
|
||||
struct fiq_debugger_state;
|
||||
struct pt_regs;
|
||||
|
||||
int fiq_debugger_printf(void *cookie, const char *fmt, ...);
|
||||
|
||||
void fiq_debugger_dump_pc(struct fiq_debugger_state *state,
|
||||
const struct pt_regs *regs);
|
||||
void fiq_debugger_dump_regs(struct fiq_debugger_state *state,
|
||||
const struct pt_regs *regs);
|
||||
void fiq_debugger_dump_allregs(struct fiq_debugger_state *state,
|
||||
const struct pt_regs *regs);
|
||||
void fiq_debugger_dump_stacktrace(struct fiq_debugger_state *state,
|
||||
const struct pt_regs *regs, unsigned int depth, void *ssp);
|
||||
|
||||
#endif
|
||||
Reference in New Issue
Block a user