mirror of
https://github.com/darlinghq/darling-xnu.git
synced 2024-11-23 12:39:55 +00:00
113 lines
3.8 KiB
C
113 lines
3.8 KiB
C
#include <darwintest.h>
|
|
#include <darwintest_utils.h>
|
|
#include <sys/sysctl.h>
|
|
#include <string.h>
|
|
#include <errno.h>
|
|
|
|
#include "test_utils.h"
|
|
|
|
/*
|
|
* Any change to this structure must be reflected in iBoot / MacEFI / PanicDump / XNU Tests and vice versa.
|
|
*/
|
|
typedef struct __attribute__((packed)) {
|
|
uint32_t magic; /* g_valid_magic if valid */
|
|
uint32_t size; /* Size of the preoslog buffer including the header */
|
|
uint32_t offset; /* Write pointer. Indicates where in the buffer new log entry would go */
|
|
uint8_t source; /* Indicates who filled in the buffer (e.g. iboot vs MacEFI) */
|
|
uint8_t wrapped; /* If equal to 1, the preoslog ring buffer wrapped at least once */
|
|
char data[]; /* log buffer */
|
|
} preoslog_header_t;
|
|
|
|
static const char* g_sysctl_kern_version = "kern.version";
|
|
static const char* g_sysctl_kern_preoslog = "kern.preoslog";
|
|
static const uint32_t g_valid_magic = 'LSOP';
|
|
|
|
/*
|
|
* Defines substrings to look up in preoslog buffer.
|
|
* To pass the test, one of the entries should match a substring in preoslog buffer.
|
|
*/
|
|
static const char* g_preoslog_buffer_string[] = {"serial output"};
|
|
|
|
static boolean_t
|
|
check_for_substrings(const char* string, size_t len)
|
|
{
|
|
int i;
|
|
boolean_t res = FALSE;
|
|
|
|
for (i = 0; i < (sizeof(g_preoslog_buffer_string) / sizeof(char*)); i++) {
|
|
res = res || strnstr(string, g_preoslog_buffer_string[i], len) == NULL ? FALSE : TRUE;
|
|
}
|
|
|
|
return res;
|
|
}
|
|
|
|
/*
|
|
* Valid cases:
|
|
* 1. Development & Debug iBoot/macEFI provides a preoslog buffer.
|
|
* 2. Release iBoot/macEFI doesn't provide a presoslog buffer.
|
|
* 3. Development & Debug xnu provids kern.preoslog sysctl.
|
|
* 4. Release xnu doesn't provide kern.preoslog sysctl.
|
|
*/
|
|
|
|
T_DECL(test_preoslog, "Validate kern.preoslog sysctl has expected log content from the boot loader")
|
|
{
|
|
int ret = 0;
|
|
size_t size = 0;
|
|
void *buffer = NULL;
|
|
preoslog_header_t *header = NULL;
|
|
char tmp = 0;
|
|
const char *lower_buffer = NULL;
|
|
size_t lower_buffer_size = 0;
|
|
const char *upper_buffer = NULL;
|
|
size_t upper_buffer_size = 0;
|
|
boolean_t found = FALSE;
|
|
|
|
// kern.preoslog is writable
|
|
ret = sysctlbyname(g_sysctl_kern_preoslog, buffer, &size, &tmp, sizeof(tmp));
|
|
T_ASSERT_POSIX_SUCCESS(ret, "kern.preoslog write check");
|
|
|
|
ret = sysctlbyname(g_sysctl_kern_preoslog, NULL, &size, NULL, 0);
|
|
if (!is_development_kernel()) {
|
|
// kern.preoslog mustn't exist on release builds of xnu
|
|
T_ASSERT_NE(ret, 0, "get size kern.preoslog ret != 0 on release builds");
|
|
T_ASSERT_POSIX_ERROR(ret, ENOENT, " get size kern.preoslog errno==ENOENT on release builds");
|
|
return;
|
|
}
|
|
|
|
/*
|
|
* Everything below is applicable only to development & debug xnu
|
|
*/
|
|
|
|
T_ASSERT_POSIX_SUCCESS(ret, "get size for kern.preoslog");
|
|
if (size == 0) {
|
|
// No preoslog buffer available, valid case if iboot is release
|
|
return;
|
|
}
|
|
|
|
buffer = calloc(size, sizeof(char));
|
|
T_ASSERT_NOTNULL(buffer, "allocate buffer for preoslog");
|
|
|
|
ret = sysctlbyname(g_sysctl_kern_preoslog, buffer, &size, NULL, 0);
|
|
T_ASSERT_POSIX_SUCCESS(ret, "get preoslog buffer");
|
|
|
|
header = (preoslog_header_t *)buffer;
|
|
T_ASSERT_EQ(header->magic, g_valid_magic, "check preoslog header magic - expected %#x, given %#x", g_valid_magic, header->magic);
|
|
T_ASSERT_EQ(header->size, size, "check preoslog sizes - expected %zu, given %zu", size, header->size);
|
|
T_ASSERT_LT(header->offset, header->size - sizeof(*header), "check write offset");
|
|
|
|
lower_buffer = header->data;
|
|
lower_buffer_size = header->offset + 1;
|
|
upper_buffer = lower_buffer + lower_buffer_size;
|
|
upper_buffer_size = header->size - lower_buffer_size - sizeof(*header);
|
|
if (header->wrapped) {
|
|
found = check_for_substrings(upper_buffer, upper_buffer_size);
|
|
}
|
|
|
|
found = found || check_for_substrings(lower_buffer, lower_buffer_size);
|
|
T_ASSERT_TRUE(found, "Verify buffer content");
|
|
|
|
free(buffer);
|
|
buffer = NULL;
|
|
header = NULL;
|
|
}
|