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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
*
* Copyright (C) 2016 Amaury Pouly
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include <stdlib.h>
#include <unistd.h>
#include <signal.h>
#include <ucontext.h>
#include <string.h>
#include "system.h"
#include "lcd.h"
#include "font.h"
#include "logf.h"
#include "system.h"
#include "backlight-target.h"
#include "button.h"
#include "adc.h"
#include "power.h"
#include "power-nwz.h"
#include <backtrace.h>
#include <stdio.h>
static const char **kern_mod_list;
void power_off(void)
{
exit(0);
}
static void compute_kern_mod_list(void)
{
/* create empty list */
kern_mod_list = malloc(sizeof(const char **));
kern_mod_list[0] = NULL;
/* read from proc file system */
FILE *f = fopen("/proc/modules", "r");
if(f == NULL)
{
printf("Cannot open /proc/modules");
return;
}
for(int i = 0;; i++)
{
/* the last entry of the list points to NULL so getline() will allocate
* some memory */
size_t n;
if(getline((char **)&kern_mod_list[i], &n, f) < 0)
{
/* make sure last entry is NULL and stop */
kern_mod_list[i] = NULL;
break;
}
/* grow array */
kern_mod_list = realloc(kern_mod_list, (i + 2) * sizeof(const char **));
/* and fill last entry with NULL */
kern_mod_list[i + 1] = NULL;
/* parse line to only keep module name */
char *p = strchr(kern_mod_list[i], ' ');
if(p != NULL)
*p = 0; /* stop at first blank */
}
fclose(f);
}
static void print_kern_mod_list(void)
{
printf("Kernel modules:\n");
const char **p = kern_mod_list;
while(*p)
printf(" %s\n", *p++);
}
/* to make thread-internal.h happy */
uintptr_t *stackbegin;
uintptr_t *stackend;
static void nwz_sig_handler(int sig, siginfo_t *siginfo, void *context)
{
/* safe guard variable - we call backtrace() only on first
* UIE call. This prevent endless loop if backtrace() touches
* memory regions which cause abort
*/
static bool triggered = false;
lcd_set_backdrop(NULL);
lcd_set_drawmode(DRMODE_SOLID);
lcd_set_foreground(LCD_BLACK);
lcd_set_background(LCD_WHITE);
unsigned line = 0;
lcd_setfont(FONT_SYSFIXED);
lcd_set_viewport(NULL);
lcd_clear_display();
/* get context info */
ucontext_t *uc = (ucontext_t *)context;
unsigned long pc = uc->uc_mcontext.arm_pc;
unsigned long sp = uc->uc_mcontext.arm_sp;
lcd_putsf(0, line++, "%s at %08x", strsignal(sig), pc);
if(sig == SIGILL || sig == SIGFPE || sig == SIGSEGV || sig == SIGBUS || sig == SIGTRAP)
lcd_putsf(0, line++, "address 0x%08x", siginfo->si_addr);
if(!triggered)
{
triggered = true;
rb_backtrace(pc, sp, &line);
}
#ifdef ROCKBOX_HAS_LOGF
lcd_putsf(0, line++, "logf:");
logf_panic_dump(&line);
#endif
lcd_update();
system_exception_wait(); /* If this returns, try to reboot */
system_reboot();
while (1); /* halt */
}
void system_init(void)
{
int *s;
/* fake stack, to make thread-internal.h happy */
stackbegin = stackend = (uintptr_t*)&s;
/* catch some signals for easier debugging */
struct sigaction sa;
sigfillset(&sa.sa_mask);
sa.sa_flags = SA_SIGINFO;
sa.sa_sigaction = &nwz_sig_handler;
sigaction(SIGILL, &sa, NULL);
sigaction(SIGABRT, &sa, NULL);
sigaction(SIGFPE, &sa, NULL);
sigaction(SIGSEGV, &sa, NULL);
sigaction(SIGPIPE, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
sigaction(SIGBUS, &sa, NULL);
sigaction(SIGTERM, &sa, NULL);
compute_kern_mod_list();
print_kern_mod_list();
/* some init not done on hosted targets */
adc_init();
power_init();
}
void system_reboot(void)
{
power_off();
}
#ifdef HAVE_BUTTON_DATA
#define IF_DATA(data) data
#else
#define IF_DATA(data)
#endif
void system_exception_wait(void)
{
backlight_hw_on();
backlight_hw_brightness(DEFAULT_BRIGHTNESS_SETTING);
/* wait until button press and release */
IF_DATA(int data);
while(button_read_device(IF_DATA(&data)) != 0) {}
while(button_read_device(IF_DATA(&data)) == 0) {}
while(button_read_device(IF_DATA(&data)) != 0) {}
while(button_read_device(IF_DATA(&data)) == 0) {}
}
int hostfs_init(void)
{
return 0;
}
int hostfs_flush(void)
{
sync();
return 0;
}
const char **nwz_get_kernel_module_list(void)
{
return kern_mod_list;
}
bool nwz_is_kernel_module_loaded(const char *name)
{
const char **p = kern_mod_list;
while(*p)
if(strcmp(*p++, name) == 0)
return true;
return false;
}
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