⬢ DragonFlyBSD Kernel Audit
DF-4635 / radeon_audio_offsets.c
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#include <stdio.h>
#include <stdint.h>
#include <stdbool.h>
#include <stddef.h>

typedef uint8_t u8; typedef uint16_t u16; typedef uint32_t u32;
struct list_head { struct list_head *next, *prev; };
typedef struct { int counter; } atomic_t;
struct kref { atomic_t refcount; };
struct drm_mode_object { uint32_t id; uint32_t type; struct drm_object_properties *properties; struct kref refcount; void (*free_cb)(struct kref *kref); };
#define DRM_DISPLAY_MODE_LEN 32
#define DRM_MODE_TYPE_BUILTIN (1<<0)
enum drm_mode_status { MODE_OK=0 };
enum hdmi_picture_aspect { HDMI_PICTURE_ASPECT_NONE };

/* verbatim from sys/dev/drm/include/drm/drm_modes.h */
struct drm_display_mode {
	struct list_head head;
	struct drm_mode_object base;
	char name[DRM_DISPLAY_MODE_LEN];
	enum drm_mode_status status;
	unsigned int type;
	int clock;
	int hdisplay; int hsync_start; int hsync_end; int htotal; int hskew;
	int vdisplay; int vsync_start; int vsync_end; int vtotal; int vscan;
	unsigned int flags;
	int width_mm; int height_mm;
	int crtc_clock; int crtc_hdisplay; int crtc_hblank_start; int crtc_hblank_end;
	int crtc_hsync_start; int crtc_hsync_end; int crtc_htotal; int crtc_hskew;
	int crtc_vdisplay; int crtc_vblank_start; int crtc_vblank_end; int crtc_vsync_start;
	int crtc_vsync_end; int crtc_vtotal;
	int *private;
	int private_flags;
	int vrefresh;
	int hsync;
	enum hdmi_picture_aspect picture_aspect_ratio;
	struct list_head export_head;
};

struct backlight_device;
struct radeon_afmt;
struct r600_audio_pin;

/* verbatim from sys/dev/drm/radeon/radeon_mode.h */
struct radeon_encoder_lvds {
	uint16_t panel_vcc_delay;
	uint8_t  panel_pwr_delay;
	uint8_t  panel_digon_delay;
	uint8_t  panel_blon_delay;
	uint16_t panel_ref_divider;
	uint8_t  panel_post_divider;
	uint16_t panel_fb_divider;
	bool     use_bios_dividers;
	uint32_t lvds_gen_cntl;
	struct drm_display_mode native_mode;
	struct backlight_device *bl_dev;
	int      dpms_mode;
	uint8_t  backlight_level;
};

struct radeon_encoder_atom_dig {
	bool linkb;
	bool coherent_mode;
	int dig_encoder;
	uint32_t lcd_misc;
	uint16_t panel_pwr_delay;
	uint32_t lcd_ss_id;
	struct drm_display_mode native_mode;
	struct backlight_device *bl_dev;
	int dpms_mode;
	uint8_t backlight_level;
	int panel_mode;
	struct radeon_afmt *afmt;
	struct r600_audio_pin *pin;
	int active_mst_links;
};

int main(void) {
	printf("sizeof(drm_display_mode)      = %zu\n", sizeof(struct drm_display_mode));
	printf("sizeof(radeon_encoder_lvds)   = %zu\n", sizeof(struct radeon_encoder_lvds));
	printf("sizeof(radeon_encoder_atom_dig)= %zu\n", sizeof(struct radeon_encoder_atom_dig));
	printf("offsetof(dig, native_mode)    = %zu\n", offsetof(struct radeon_encoder_atom_dig, native_mode));
	printf("offsetof(dig, afmt)           = %zu\n", offsetof(struct radeon_encoder_atom_dig, afmt));
	printf("offsetof(dig, pin)            = %zu\n", offsetof(struct radeon_encoder_atom_dig, pin));
	printf("offsetof(lvds, backlight_level)= %zu\n", offsetof(struct radeon_encoder_lvds, backlight_level));
	printf("OOB delta: dig->pin is %zu bytes past end of lvds alloc\n",
		offsetof(struct radeon_encoder_atom_dig, pin) - sizeof(struct radeon_encoder_lvds));
	return 0;
}