diff options
| -rw-r--r-- | arch/powerpc/xmon/xmon.c | 47 |
1 files changed, 47 insertions, 0 deletions
diff --git a/arch/powerpc/xmon/xmon.c b/arch/powerpc/xmon/xmon.c index 8dfad7d9a004..08121d3e47ba 100644 --- a/arch/powerpc/xmon/xmon.c +++ b/arch/powerpc/xmon/xmon.c @@ -110,6 +110,7 @@ static int bsesc(void); static void dump(void); static void prdump(unsigned long, long); static int ppc_inst_dump(unsigned long, long, int); +static void dump_log_buf(void); static void backtrace(struct pt_regs *); static void excprint(struct pt_regs *); static void prregs(struct pt_regs *); @@ -197,6 +198,7 @@ Commands:\n\ di dump instructions\n\ df dump float values\n\ dd dump double values\n\ + dl dump the kernel log buffer\n\ dr dump stream of raw bytes\n\ e print exception information\n\ f flush cache\n\ @@ -2009,6 +2011,8 @@ dump(void) nidump = MAX_DUMP; adrs += ppc_inst_dump(adrs, nidump, 1); last_cmd = "di\n"; + } else if (c == 'l') { + dump_log_buf(); } else if (c == 'r') { scanhex(&ndump); if (ndump == 0) @@ -2122,6 +2126,49 @@ print_address(unsigned long addr) xmon_print_symbol(addr, "\t# ", ""); } +void +dump_log_buf(void) +{ + const unsigned long size = 128; + unsigned long i, end, addr; + unsigned char buf[size + 1]; + + addr = 0; + buf[size] = '\0'; + + if (setjmp(bus_error_jmp) != 0) { + printf("Unable to lookup symbol __log_buf!\n"); + return; + } + + catch_memory_errors = 1; + sync(); + addr = kallsyms_lookup_name("__log_buf"); + + if (! addr) + printf("Symbol __log_buf not found!\n"); + else { + end = addr + (1 << CONFIG_LOG_BUF_SHIFT); + while (addr < end) { + if (! mread(addr, buf, size)) { + printf("Can't read memory at address 0x%lx\n", addr); + break; + } + + printf("%s", buf); + + if (strlen(buf) < size) + break; + + addr += size; + } + } + + sync(); + /* wait a little while to see if we get a machine check */ + __delay(200); + catch_memory_errors = 0; +} /* * Memory operations - move, set, print differences |