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59 lines
1.2 KiB
59 lines
1.2 KiB
// SPDX-License-Identifier: GPL-2.0 |
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#include <linux/kmsg_dump.h> |
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#include <linux/spinlock.h> |
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#include <linux/console.h> |
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#include <linux/string.h> |
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#include <shared/init.h> |
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#include <shared/kern.h> |
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#include <os.h> |
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static void kmsg_dumper_stdout(struct kmsg_dumper *dumper, |
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enum kmsg_dump_reason reason) |
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{ |
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static struct kmsg_dump_iter iter; |
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static DEFINE_SPINLOCK(lock); |
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static char line[1024]; |
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struct console *con; |
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unsigned long flags; |
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size_t len = 0; |
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/* only dump kmsg when no console is available */ |
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if (!console_trylock()) |
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return; |
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for_each_console(con) { |
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if(strcmp(con->name, "tty") == 0 && |
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(con->flags & (CON_ENABLED | CON_CONSDEV)) != 0) { |
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break; |
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} |
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} |
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console_unlock(); |
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if (con) |
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return; |
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if (!spin_trylock_irqsave(&lock, flags)) |
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return; |
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kmsg_dump_rewind(&iter); |
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printf("kmsg_dump:\n"); |
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while (kmsg_dump_get_line(&iter, true, line, sizeof(line), &len)) { |
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line[len] = '\0'; |
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printf("%s", line); |
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} |
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spin_unlock_irqrestore(&lock, flags); |
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} |
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static struct kmsg_dumper kmsg_dumper = { |
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.dump = kmsg_dumper_stdout |
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}; |
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int __init kmsg_dumper_stdout_init(void) |
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{ |
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return kmsg_dump_register(&kmsg_dumper); |
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} |
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__uml_postsetup(kmsg_dumper_stdout_init);
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