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openfirmware: implement the in-memory log

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We should probably make this code more platform-generic, the
implementation is very similar to the EFI one.

Change-Id: I17c9db933bfc2a81c96816dd6348d2d0c9627951
Reviewed-on: https://review.haiku-os.org/c/haiku/+/2369
Reviewed-by: waddlesplash <waddlesplash@gmail.com>
This commit is contained in:
PulkoMandy 2020-03-16 17:43:28 +01:00 committed by waddlesplash
parent 442a131da7
commit ae5a068f62
1 changed files with 39 additions and 7 deletions
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46
src/system/boot/platform/openfirmware/debug.cpp
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@ -1,16 +1,30 @@
/*
* Copyright 2003-2010, Axel Dörfler, axeld@pinc-software.de.
* Copyright 2016 Haiku, Inc. All rights reserved.
* Distributed under the terms of the MIT License.
*/
#include <stdarg.h>
#include <string.h>
#include <boot/platform.h>
#include <boot/stdio.h>
#include <platform/openfirmware/openfirmware.h>
static char sBuffer[16384];
static uint32 sBufferPosition;
static void
syslog_write(const char* buffer, size_t length)
{
memcpy(sBuffer + sBufferPosition, buffer, length);
sBufferPosition += length;
}
extern "C" void
panic(const char* format, ...)
{
@ -27,19 +41,37 @@ panic(const char* format, ...)
}
extern "C" void
dprintf(const char* format, ...)
static void
dprintf_args(const char *format, va_list args)
{
va_list list;
char buffer[512];
int length = vsnprintf(buffer, sizeof(buffer), format, args);
if (length == 0)
return;
va_start(list, format);
vprintf(format, list);
va_end(list);
syslog_write(buffer, length);
printf("%s", buffer);
}
extern "C" void
dprintf(const char *format, ...)
{
va_list args;
va_start(args, format);
dprintf_args(format, args);
va_end(args);
}
char*
platform_debug_get_log_buffer(size_t* _size)
{
return NULL;
if (_size != NULL)
*_size = sizeof(sBuffer);
return sBuffer;
}