void *quantizate(float *x, size_t *n, const float factor, int *nbbits)
{
size_t i;
int min, max;
void *res;
int *q;
float real_factor = factor;
q = malloc(*n * sizeof(int));
min = max = 0;
for (i = 0; i < *n; i++)
{
if ((i < *n / 2 && is_pow2(i)) || (i > *n / 2 && is_pow2(i - *n / 2)))
real_factor *= 1.0f;
if (i == *n / 2)
real_factor = factor;
/*q[i] = sign(x[i]) * sqrtf(abs(x[i]) / real_factor);*/
q[i] = sign(x[i]) * powf(abs(x[i]) / real_factor, 3.0f / 4.0f);
/*q[i] = sign(x[i]) * floorf(abs(x[i] / factor));*/
if (q[i] > max)
max = q[i];
else if (q[i] < min)
min = q[i];
}
min = abs(min);
max = max > min ? max : min;
min = nb_bits(max);
res = encode(q, *n, min, n);
*nbbits = min;
free(q);
return res;
}
static void texture_set_data(texture_t *tex,
const uint8_t *data, int w, int h, int bpp)
{
uint8_t *buff0 = NULL;
int data_type = GL_UNSIGNED_BYTE;
if (!is_pow2(w) || !is_pow2(h)) {
buff0 = calloc(bpp, tex->tex_w * tex->tex_h);
blit(data, w, h, bpp, buff0, tex->tex_w, tex->tex_h);
data = buff0;
}
GL(glGenTextures(1, &tex->tex));
GL(glActiveTexture(GL_TEXTURE0));
GL(glBindTexture(GL_TEXTURE_2D, tex->tex));
GL(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR));
GL(glTexParameterf(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER,
(tex->flags & TF_MIPMAP)? GL_LINEAR_MIPMAP_NEAREST : GL_LINEAR));
GL(glTexImage2D(GL_TEXTURE_2D, 0, tex->format, tex->tex_w, tex->tex_h,
0, tex->format, data_type, data));
free(buff0);
if (tex->flags & TF_MIPMAP)
GL(glGenerateMipmap(GL_TEXTURE_2D));
}
float *dequantizate(uint8_t *x, size_t *n, const float factor, int nbbits)
{
size_t i;
size_t nb_elmts = (((*n - 1) * 8) / nbbits);
float *res = malloc(nb_elmts * sizeof(float));
int nb;
int offset;
float real_factor = factor;
offset = 0;
for (i = 0; i < nb_elmts; i++)
{
if ((i < nb_elmts / 2 && is_pow2(i))
|| (i > nb_elmts / 2 && is_pow2(i - nb_elmts / 2)))
real_factor *= 1.0f;
if (i == nb_elmts / 2)
real_factor = factor;
nb = next_nb(&x, nbbits, &offset);
if (nb == 0)
res[i] = 0.0f;
else
/*res[i] = sign(nb) * powf(abs(nb), 2) * real_factor;*/
res[i] = sign(nb) * powf(abs(nb), 4.0f / 3.0f) * real_factor;
/*res[i] = sign(nb) * (abs(nb) + 0.5f) * factor;*/
}
*n = nb_elmts;
return res;
}
texture_t gs_create_texture(uint32_t width, uint32_t height,
enum gs_color_format color_format, uint32_t levels,
const void **data, uint32_t flags)
{
graphics_t graphics = thread_graphics;
bool pow2tex = is_pow2(width) && is_pow2(height);
bool uses_mipmaps = (flags & GS_BUILDMIPMAPS || levels != 1);
if (uses_mipmaps && !pow2tex) {
blog(LOG_WARNING, "Cannot use mipmaps with a "
"non-power-of-two texture. Disabling "
"mipmaps for this texture.");
uses_mipmaps = false;
flags &= ~GS_BUILDMIPMAPS;
levels = 1;
}
if (uses_mipmaps && flags & GS_RENDERTARGET) {
blog(LOG_WARNING, "Cannot use mipmaps with render targets. "
"Disabling mipmaps for this texture.");
flags &= ~GS_BUILDMIPMAPS;
levels = 1;
}
return graphics->exports.device_create_texture(graphics->device,
width, height, color_format, levels, data, flags);
}
static int larger_pow2(int n)
{
if (is_pow2(n))
return n;
while(!is_pow2(n))
n= n&(n-1);
return n*2;
}
void test_math(void) {
test_floor_log2();
test_ceil_log2();
test_exact_log2();
test_hyperfloor();
assert(is_pow2(1));
assert(is_pow2(4096));
assert(!is_pow2(7));
assert(!is_pow2(9999));
}
static int smaller_pow2(int n)
{
while (!is_pow2(n))
n= n&(n-1);
return n;
}
static void split_width(int x, int n, int *splitx, int *nx)
{
int a, newnx, waste;
/* if already power of two just use it */
if(is_pow2(x)) {
splitx[0]= x;
(*nx)++;
return;
}
if(n == 1) {
/* last part, we have to go larger */
splitx[0]= larger_pow2(x);
(*nx)++;
}
else {
/* two or more parts to go, use smaller part */
splitx[0]= smaller_pow2(x);
newnx= ++(*nx);
split_width(x-splitx[0], n-1, splitx+1, &newnx);
for(waste=0, a=0; a<n; a++)
waste += splitx[a];
/* if we waste more space or use the same amount,
* revert deeper splits and just use larger */
if(waste >= larger_pow2(x)) {
splitx[0]= larger_pow2(x);
memset(splitx+1, 0, sizeof(int)*(n-1));
}
else
*nx= newnx;
}
}
int BL_Texture::GetPow2(int n)
{
if(!is_pow2(n))
n = smaller_pow2(n);
return n;
}
static void
resize(struct hmap *hmap, size_t new_mask, const char *where)
{
struct hmap tmp;
size_t i;
ovs_assert(is_pow2(new_mask + 1));
hmap_init(&tmp);
if (new_mask) {
tmp.buckets = xmalloc(sizeof *tmp.buckets * (new_mask + 1));
tmp.mask = new_mask;
for (i = 0; i <= tmp.mask; i++) {
tmp.buckets[i] = NULL;
}
}
for (i = 0; i <= hmap->mask; i++) {
struct hmap_node *node, *next;
int count = 0;
for (node = hmap->buckets[i]; node; node = next) {
next = node->next;
hmap_insert_fast(&tmp, node, node->hash);
count++;
}
if (count > 5) {
static struct vlog_rate_limit rl = VLOG_RATE_LIMIT_INIT(10, 10);
COVERAGE_INC(hmap_pathological);
VLOG_DBG_RL(&rl, "%s: %d nodes in bucket (%"PRIuSIZE" nodes, %"PRIuSIZE" buckets)",
where, count, hmap->n, hmap->mask + 1);
}
}
hmap_swap(hmap, &tmp);
hmap_destroy(&tmp);
}
void vchiq_init_state(VCHIQ_STATE_T *state, VCHIQ_CHANNEL_T *local, VCHIQ_CHANNEL_T *remote)
{
VCOS_THREAD_ATTR_T attrs;
char threadname[8];
static int id = 0;
vcos_assert(is_pow2(VCHIQ_CHANNEL_SIZE));
vcos_assert(is_pow2(VCHIQ_NUM_CURRENT_BULKS));
vcos_assert(is_pow2(VCHIQ_NUM_SERVICE_BULKS));
vcos_assert(sizeof(VCHIQ_HEADER_T) == 8); /* we require this for consistency between endpoints */
memset(state, 0, sizeof(VCHIQ_STATE_T));
state->id = id++;
/*
initialize events and mutex
*/
vcos_event_create(&state->connect, "vchiq");
vcos_mutex_create(&state->mutex, "vchiq");
/*
initialize channel pointers
*/
state->local = local;
state->remote = remote;
vchiq_init_channel(local);
/*
bring up slot handler thread
*/
vcos_thread_attr_init(&attrs);
vcos_thread_attr_setstacksize(&attrs, VCHIQ_SLOT_HANDLER_STACK);
vcos_thread_attr_setpriority(&attrs, 5); /* FIXME: should not be hardcoded */
vcos_thread_attr_settimeslice(&attrs, 20); /* FIXME: should not be hardcoded */
strcpy(threadname, "VCHIQ-0");
threadname[6] += state->id % 10;
vcos_thread_create(&state->slot_handler_thread, threadname,
&attrs, slot_handler_func, state);
/* Indicate readiness to the other side */
local->initialised = 1;
}
RADCFUNC HRAD3DIMAGE Open_RAD_3D_image( HRAD3D rad_3d,
u32 width,
u32 height,
s32 alpha_pixels,
u32 maximum_texture_size )
{
if ( ( is_pow2( width ) && is_pow2( height ) ) || ( rad_3d->nonpow2_textures_supported ) )
{
return Open_RAD_3D_image_lin( rad_3d, width, height,
alpha_pixels, maximum_texture_size );
}
else
{
return Open_RAD_3D_image_pow2( rad_3d, width, height,
alpha_pixels, maximum_texture_size );
}
}
/* Initializes 'q' as an empty byteq that uses the 'size' bytes of 'buffer' to
* store data. 'size' must be a power of 2.
*
* The caller must ensure that 'buffer' remains available to the byteq as long
* as 'q' is in use. */
void
byteq_init(struct byteq *q, uint8_t *buffer, size_t size)
{
ovs_assert(is_pow2(size));
q->buffer = buffer;
q->size = size;
q->head = q->tail = 0;
}
/** Initialize a fixed heap allocator.
* @param heap Heap to initialize.
* @param mem Memory area to use.
* @param size Size of memory area. */
void fixed_heap_init(fixed_heap_t *heap, void *mem, size_t size) {
assert(size >= (sizeof(fixed_heap_tag_t) + 8));
assert(is_pow2(size));
/* Create an initial free segment covering the entire chunk. */
heap->tags = mem;
heap->tags->next = NULL;
heap->tags->data = size;
}
UniqueRange Allocate(size_t size, size_t alignment)
{
ENSURE(is_pow2(alignment));
if(alignment <= (size_t)idxDeleterBits)
alignment = idxDeleterBits+1;
const size_t alignedSize = round_up(size, alignment);
const UniqueRange::pointer p = rtl_AllocateAligned(alignedSize, alignment);
return RVALUE(UniqueRange(p, size, idxDeleterAligned));
}
void BL_Texture::InitGLTex(unsigned int *pix,int x,int y,bool mipmap)
{
if (!is_pow2(x) || !is_pow2(y) ) {
InitNonPow2Tex(pix, x,y,mipmap);
return;
}
glBindTexture(GL_TEXTURE_2D, mTexture );
if( mipmap ) {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR_MIPMAP_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
gluBuild2DMipmaps( GL_TEXTURE_2D, GL_RGBA, x, y, GL_RGBA, GL_UNSIGNED_BYTE, pix );
}
else {
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MIN_FILTER, GL_LINEAR);
glTexParameteri(GL_TEXTURE_2D, GL_TEXTURE_MAG_FILTER, GL_LINEAR);
glTexImage2D( GL_TEXTURE_2D, 0, GL_RGBA, x, y, 0, GL_RGBA, GL_UNSIGNED_BYTE, pix );
}
glTexEnvi(GL_TEXTURE_ENV, GL_TEXTURE_ENV_MODE, GL_MODULATE);
}
UniqueRange AllocateAligned(size_t size, size_t alignment)
{
ENSURE(is_pow2(alignment));
alignment = std::max(alignment, allocationAlignment);
const size_t alignedSize = round_up(size, alignment);
const UniqueRange::pointer p = rtl_AllocateAligned(alignedSize, alignment);
static volatile IdxDeleter idxDeleterAligned;
if(idxDeleterAligned == 0) // (optional optimization)
RegisterUniqueRangeDeleter(FreeAligned, &idxDeleterAligned);
return RVALUE(UniqueRange(p, size, idxDeleterAligned));
}
int vchiu_queue_init(VCHIU_QUEUE_T *queue, int size)
{
WARN_ON(!is_pow2(size));
queue->size = size;
queue->read = 0;
queue->write = 0;
sema_init(&queue->pop, 0);
sema_init(&queue->push, 0);
queue->storage = kzalloc(size * sizeof(VCHIQ_HEADER_T *), GFP_KERNEL);
if (queue->storage == NULL) {
vchiu_queue_delete(queue);
return 0;
}
return 1;
}
int vchiu_queue_init(VCHIU_QUEUE_T *queue, int size)
{
vcos_assert(is_pow2(size));
queue->size = size;
queue->read = 0;
queue->write = 0;
vcos_event_create(&queue->pop, "vchiu");
vcos_event_create(&queue->push, "vchiu");
queue->storage = vcos_malloc(size * sizeof(VCHIQ_HEADER_T *), VCOS_FUNCTION);
if (queue->storage == NULL)
{
vchiu_queue_delete(queue);
return 0;
}
return 1;
}
int vchiu_queue_init(struct vchiu_queue *queue, int size)
{
WARN_ON(!is_pow2(size));
queue->size = size;
queue->read = 0;
queue->write = 0;
queue->initialized = 1;
init_completion(&queue->pop);
init_completion(&queue->push);
queue->storage = kcalloc(size, sizeof(struct vchiq_header *),
GFP_KERNEL);
if (!queue->storage) {
vchiu_queue_delete(queue);
return 0;
}
return 1;
}
/**
* Build a QHT RESET message.
*
* @param slots amount of slots in the table (power of 2)
* @param inf_val infinity value (1)
*
* @return a /QHT message with a RESET payload.
*/
pmsg_t *
g2_build_qht_reset(int slots, int inf_val)
{
g2_tree_t *t;
char body[6];
void *p = &body[0];
pmsg_t *mb;
g_assert(is_pow2(slots));
g_assert(1 == inf_val); /* Only 1-bit patches in G2 */
p = poke_u8(p, G2_QHT_RESET);
p = poke_le32(p, slots);
p = poke_u8(p, inf_val);
t = g2_tree_alloc(G2_NAME(QHT), body, sizeof body);
mb = g2_build_pmsg(t);
g2_tree_free_null(&t);
return mb;
}
/* Reallocates 'hindex''s array of buckets to use bitwise mask 'new_mask'. */
static void
hindex_resize(struct hindex *hindex, size_t new_mask)
{
struct hindex tmp;
size_t i;
ovs_assert(is_pow2(new_mask + 1));
ovs_assert(new_mask != SIZE_MAX);
hindex_init(&tmp);
if (new_mask) {
tmp.buckets = xmalloc(sizeof *tmp.buckets * (new_mask + 1));
tmp.mask = new_mask;
for (i = 0; i <= tmp.mask; i++) {
tmp.buckets[i] = NULL;
}
}
for (i = 0; i <= hindex->mask; i++) {
struct hindex_node *node, *next;
int count;
count = 0;
for (node = hindex->buckets[i]; node; node = next) {
struct hindex_node **head = &tmp.buckets[node->hash & tmp.mask];
next = node->d;
node->d = *head;
*head = node;
count++;
}
if (count > 5) {
COVERAGE_INC(hindex_pathological);
}
}
tmp.n_unique = hindex->n_unique;
hindex_swap(hindex, &tmp);
hindex_destroy(&tmp);
}
void* aligned_malloc(const size_t size, size_t alignment)
{
// Often, the value of alignment is set to the line size of the L1 data cache as
// reported by foundation::System::get_l1_data_cache_line_size(). It may happen
// that this function returns 0 if the CPU cache information cannot be retrieved.
// For convenience we handle this situation here by using a reasonable alignment
// value when this happens.
if (alignment == 0)
alignment = 16;
assert(size > 0);
assert(is_pow2(alignment));
// Compute the total number of bytes of memory we need to allocate.
const size_t total_size = size + sizeof(void*) + (alignment - 1);
// Allocate the memory.
void** const unaligned_ptr = reinterpret_cast<void**>(malloc(total_size));
// Handle allocation failures.
if (!unaligned_ptr)
{
log_allocation_failure(total_size);
return 0;
}
// Compute the next aligned address.
void** const aligned_ptr = align(unaligned_ptr + 1, alignment);
// Store the address of the unaligned memory block.
*(aligned_ptr - 1) = unaligned_ptr;
log_allocation(aligned_ptr, total_size);
return aligned_ptr;
}
static int64_t p5ioc2_set_tce_mem(struct io_hub *hub, uint64_t address,
uint64_t size)
{
struct p5ioc2 *ioc = iohub_to_p5ioc2(hub);
int64_t rc;
printf("P5IOC2: set_tce_mem(0x%016llx size 0x%llx)\n",
address, size);
/* The address passed must be naturally aligned */
if (address && !is_pow2(size))
return OPAL_PARAMETER;
if (address & (size - 1))
return OPAL_PARAMETER;
ioc->tce_base = address;
ioc->tce_size = size;
rc = gx_configure_tce_bar(ioc->host_chip, ioc->gx_bus,
address, size);
if (rc)
return OPAL_INTERNAL_ERROR;
return OPAL_SUCCESS;
}
TexHandle tex_create(uint width, uint height) {
assert(width && height);
// Validate size
int max_size = 0;
glGetIntegerv(GL_MAX_TEXTURE_SIZE, &max_size);
if(width > max_size || height > max_size)
LOG_ERROR("Can't create texture so large!");
if(!(is_pow2(width) && is_pow2(height)))
LOG_ERROR("Texture dimensions must be a power of 2");
// Prep pixel data
void* data = MEM_ALLOC(4 * width * height);
memset(data, 0, 4 * width * height);
uint gl_id = _make_gl_texture(data, width, height);
MEM_FREE(data);
// Fill texture struct
Texture new_tex = {
.gl_id = gl_id,
.file = NULL,
.retain_count = 1,
.active = true,
.scale = 1.0f,
.width = width,
.height = height
};
darray_append(&textures, &new_tex);
return textures.size - 1;
}
TexHandle tex_load(const char* filename) {
return tex_load_filter(filename, NULL);
}
TexHandle tex_load_filter(const char* filename, TexFilter filter) {
assert(filename);
Texture* tex = DARRAY_DATA_PTR(textures, Texture);
// Look if texture is already loaded
for(uint i = 0; i < textures.size; ++i) {
if(tex[i].active) {
if(tex[i].file && strcmp(tex[i].file, filename) == 0) {
tex[i].retain_count++;
return i;
}
}
}
LOG_INFO("Loading texture (with filtering) from file %s", filename);
Texture new_tex;
PixelFormat fmt;
void* data = image_load(filename, &new_tex.width, &new_tex.height, &fmt);
if(filter)
(*filter)((Color*)data, new_tex.width, new_tex.height);
uint gl_id = _make_gl_texture(data, new_tex.width, new_tex.height);
new_tex.gl_id = gl_id;
new_tex.file = strclone(filename);
new_tex.retain_count = 1;
new_tex.active = true;
new_tex.scale = 1.0f;
darray_append(&textures, &new_tex);
return textures.size-1;
}
static int smaller_pow2(int num) {
while (!is_pow2(num))
num= num&(num-1);
return num;
}
bool BL_Texture::InitCubeMap(int unit, EnvMap *cubemap)
{
if (!GLEW_ARB_texture_cube_map)
{
spit("cubemaps not supported");
mOk = false;
return mOk;
}
else if (!cubemap || cubemap->ima->ok==0)
{
mOk = false;
return mOk;
}
ImBuf *ibuf= BKE_image_get_ibuf(cubemap->ima, NULL);
if (ibuf==0)
{
cubemap->ima->ok = 0;
mOk = false;
return mOk;
}
mNeedsDeleted = 1;
mType = GL_TEXTURE_CUBE_MAP_ARB;
mTexture = 0;
mUnit = unit;
ActivateUnit(mUnit);
BL_TextureMap::iterator mapLook = g_textureManager.find(cubemap->ima->id.name);
if (mapLook != g_textureManager.end())
{
if (mapLook->second.gl_texture != 0 && mapLook->second.ref_buffer == cubemap->ima)
{
mTexture = mapLook->second.gl_texture;
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, mTexture);
mOk = IsValid();
return mOk;
}
}
glGenTextures(1, (GLuint*)&mTexture);
glBindTexture(GL_TEXTURE_CUBE_MAP_ARB, mTexture);
// track created units
BL_TextureObject obj;
obj.gl_texture = mTexture;
obj.ref_buffer = cubemap->ima;
g_textureManager.insert(std::pair<char*, BL_TextureObject>((char*)cubemap->ima->id.name, obj));
bool needs_split = false;
if (!cubemap->cube[0])
{
needs_split = true;
spit ("Re-Generating texture buffer");
}
if (needs_split)
my_envmap_split_ima(cubemap, ibuf);
if (!is_pow2(cubemap->cube[0]->x) || !is_pow2(cubemap->cube[0]->y))
{
spit("invalid envmap size please render with CubeRes @ power of two");
my_free_envmapdata(cubemap);
mOk = false;
return mOk;
}
#define SetCubeMapFace(face, num) \
glTexImage2D(face, 0,GL_RGBA, \
cubemap->cube[num]->x, \
cubemap->cube[num]->y, \
0, GL_RGBA, GL_UNSIGNED_BYTE, \
cubemap->cube[num]->rect)
SetCubeMapFace(GL_TEXTURE_CUBE_MAP_POSITIVE_X_ARB, 5);
SetCubeMapFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_X_ARB, 3);
SetCubeMapFace(GL_TEXTURE_CUBE_MAP_POSITIVE_Y_ARB, 0);
SetCubeMapFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_Y_ARB, 1);
SetCubeMapFace(GL_TEXTURE_CUBE_MAP_POSITIVE_Z_ARB, 2);
SetCubeMapFace(GL_TEXTURE_CUBE_MAP_NEGATIVE_Z_ARB, 4);
glTexParameteri( GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MIN_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_MAG_FILTER, GL_LINEAR );
glTexParameteri( GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_S, GL_CLAMP_TO_EDGE );
glTexParameteri( GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_T, GL_CLAMP_TO_EDGE );
if(GLEW_VERSION_1_2)
glTexParameteri( GL_TEXTURE_CUBE_MAP_ARB, GL_TEXTURE_WRAP_R, GL_CLAMP_TO_EDGE );
if (needs_split)
my_free_envmapdata(cubemap);
glDisable(GL_TEXTURE_CUBE_MAP_ARB);
ActivateUnit(0);
mOk = IsValid();
return mOk;
}
/* Returns true if 'protocol' is a single OFPUTIL_P_* value, false
* otherwise. */
bool
ofputil_protocol_is_valid(enum ofputil_protocol protocol)
{
return protocol & OFPUTIL_P_ANY && is_pow2(protocol);
}
int buf_ctor(struct buf_s *buf, size_t bsiz, size_t rblk, size_t wblk, int rline, int wline, size_t hpage, size_t ioar, size_t ioaw)
{
int ret = -1;
size_t adj, page, idx, rblki, wblki, bsiza, csiza;
if (!buf) {
fputs("buf: no buf ?\n", stderr);
return -1;
}
if (bsiz < 2*rblk || bsiz < 2*wblk) {
fputs("buf: 'buffer size' must be at least 2*max('read block, 'write block'),\n"
" to avoid corner case starvations.\n", stderr);
return -1;
}
memset(buf, 0, sizeof *buf);
#ifndef h_mingw
page = sysconf(_SC_PAGESIZE);
if (page == hpage) {
hpage = 0;
}
page = hpage ? hpage : page;
adj = MAX(page, SHMLBA);
#else
hpage = 0;
adj = page = 4096;
#endif
bsiza = ALIGN(bsiz, adj);
if (!(idx = is_pow2(bsiza))) {
fprintf(stderr, "buf: 'aligned buffer size' must be power of 2, but is: 0x%zX\n", bsiza);
goto out;
}
buf->mask = (((size_t)1 << idx) - 1);
rblki = ALIGN(rblk, ioar);
wblki = ALIGN(wblk, ioaw);
csiza = ALIGN(rblki + wblki, adj);
buf->size = bsiza;
preset_shm(buf);
if (setup_shm(buf, bsiza, csiza, hpage) < 0) {
fputs("buf: falling back to regular malloc()\n", stderr);
ret = 1;
detach_shm(buf);
rm_shm(buf);
preset_mal(buf);
if (setup_mal(buf, bsiza, csiza, adj) < 0) {
detach_mal(buf);
ret = -1;
goto out;
}
} else
ret = 0;
buf->rchunk = buf->chk;
buf->wchunk = buf->chk + rblki;
buf->flags |= hpage && buf->mapW ? M_HUGE : 0;
buf->flags |= rline ? M_LINER : 0;
buf->flags |= wline ? M_LINEW : 0;
// buf->page = page;
buf->ioar = ioar;
buf->ioaw = ioaw;
buf->rblk = rblk;
buf->wblk = wblk;
buf->crcw = crc_beg();
buf->crcr = buf->crcw;
#if 0
if (rblk < wblk && rline && !wline) {
fputs("buf: 'read block' must be greater or equal to 'write block',\n"
" if the left side is in the line mode,\n"
" and the right side is in the reblocking mode.\n", stderr);
goto out;
}
#endif
DEB("\nbuf map: C:%p, B:%p, B+S:%p, W:%p\n", buf->mapC, buf->mapB, buf->mapB + buf->size, buf->mapW);
DEB("buf buf: C:%p, B:%p\n", buf->chk, buf->buf);
out:
if (ret < 0)
buf_dtor(buf);
fputc('\n', stderr);
return ret;
}
// read full kernel into obuf[], gzip-decompress into ibuf[],
// return decompressed size
int PackVmlinuzI386::decompressKernel()
{
// read whole kernel image
obuf.alloc(file_size);
fi->seek(0, SEEK_SET);
fi->readx(obuf, file_size);
{
const upx_byte *base = NULL;
unsigned relocated = 0;
// See startup_32: in linux/arch/i386/boot/compressed/head.S
const upx_byte *p = &obuf[setup_size];
unsigned cpa_0 = 0;
unsigned cpa_1 = 0;
int j;
if (0x205<=h.version) {
cpa_0 = h.kernel_alignment;
cpa_1 = 0u - cpa_0;
} else
for ((p = &obuf[setup_size]), (j= 0); j < 0x200; ++j, ++p) {
if (0==memcmp("\x89\xeb\x81\xc3", p, 4)
&& 0==memcmp("\x81\xe3", 8+ p, 2)) {
// movl %ebp,%ebx
// addl $imm.w,%ebx
// andl $imm.w,%ebx
cpa_0 = 1+ get_te32( 4+ p);
cpa_1 = get_te32(10+ p);
break;
}
}
for ((p = &obuf[setup_size]), (j= 0); j < 0x200; ++j, ++p) {
if (0==memcmp("\x8d\x83", p, 2) // leal d32(%ebx),%eax
&& 0==memcmp("\xff\xe0", 6+ p, 2) // jmp *%eax
) {
relocated = get_te32(2+ p);
}
if (0==memcmp("\xE8\x00\x00\x00\x00\x5D", p, 6)) {
// "call 1f; 1f: pop %ebp" determines actual execution address.
// linux-2.6.21 (spring 2007) and later; upx stub needs work
// unless LOAD_PHYSICAL_ADDR is known.
// Allowed code is: linux-2.6.23/arch/x86/head_32.S 2008-01-01
// call 1f
// 1: popl %ebp
// subl $1b, %ebp # 32-bit immediate
// movl $LOAD_PHYSICAL_ADDR, %ebx
//
if (0==memcmp("\x81\xed", 6+ p, 2) // subl $imm.w,%ebp
&& 0==memcmp("\xbb", 12+ p, 1) ) { // movl $imm.w,%ebx
physical_start = get_te32(13+ p);
} else
if (0==memcmp("\x81\xed", 6+ p, 2) // subl $imm.w,%ebp
&& is_pow2(cpa_0) && (0u-cpa_0)==cpa_1) {
base = (5+ p) - get_te32(8+ p);
config_physical_align = cpa_0;
}
else {
throwCantPack("Unrecognized relocatable kernel");
}
}
// Find "ljmp $__BOOT_CS,$__PHYSICAL_START" if any.
if (0==memcmp("\xEA\x00\x00", p, 3) && 0==(0xf & p[3]) && 0==p[4]) {
/* whole megabyte < 16 MiB */
physical_start = get_te32(1+ p);
break;
}
}
if (base && relocated) {
p = base + relocated;
for (j = 0; j < 0x200; ++j, ++p) {
if (0==memcmp("\x01\x9c\x0b", p, 3) // addl %ebx,d32(%ebx,%ecx)
) {
page_offset = 0u - get_te32(3+ p);
}
if (0==memcmp("\x89\xeb", p, 2) // movl %ebp,%ebx
&& 0==memcmp("\x81\xeb", 2+ p, 2) // subl $imm32,%ebx
) {
physical_start = get_te32(4+ p);
}
}
}
}
checkAlreadyPacked(obuf + setup_size, UPX_MIN(file_size - setup_size, (off_t)1024));
int gzoff = setup_size;
if (0x208<=h.version) {
gzoff += h.payload_offset;
}
for (; gzoff < file_size; gzoff++)
{
// find gzip header (2 bytes magic + 1 byte method "deflated")
int off = find(obuf + gzoff, file_size - gzoff, "\x1F\x8B\x08", 3);
if (off < 0)
break;
gzoff += off;
const int gzlen = (h.version < 0x208) ? (file_size - gzoff) : h.payload_length;
if (gzlen < 256)
break;
// check gzip flag byte
unsigned char flags = obuf[gzoff + 3];
if ((flags & 0xe0) != 0) // reserved bits set
continue;
//printf("found gzip header at offset %d\n", gzoff);
// try to decompress
int klen;
int fd;
off_t fd_pos;
for (;;)
{
klen = -1;
fd = -1;
fd_pos = -1;
// open
fi->seek(gzoff, SEEK_SET);
fd = dup(fi->getFd());
if (fd < 0)
break;
gzFile zf = gzdopen(fd, "rb");
if (zf == NULL)
break;
// estimate gzip-decompressed kernel size & alloc buffer
if (ibuf.getSize() == 0)
ibuf.alloc(gzlen * 3);
// decompress
klen = gzread(zf, ibuf, ibuf.getSize());
fd_pos = lseek(fd, 0, SEEK_CUR);
gzclose(zf);
fd = -1;
if (klen != (int)ibuf.getSize())
break;
// realloc and try again
unsigned s = ibuf.getSize();
ibuf.dealloc();
ibuf.alloc(3 * s / 2);
}
if (fd >= 0)
(void) close(fd);
if (klen <= 0)
continue;
if (klen <= gzlen)
continue;
if (0x208<=h.version && 0==memcmp("\177ELF", ibuf, 4)) {
// Full ELF in theory; for now, try to handle as .bin at physical_start.
// Check for PT_LOAD.p_paddr being ascending and adjacent.
Elf_LE32_Ehdr const *const ehdr = (Elf_LE32_Ehdr const *)(void const *)ibuf;
Elf_LE32_Phdr const *phdr = (Elf_LE32_Phdr const *)(ehdr->e_phoff + (char const *)ehdr);
Elf_LE32_Shdr const *shdr = (Elf_LE32_Shdr const *)(ehdr->e_shoff + (char const *)ehdr);
unsigned hi_paddr = 0, lo_paddr = 0;
unsigned delta_off = 0;
for (unsigned j=0; j < ehdr->e_phnum; ++j, ++phdr) {
if (phdr->PT_LOAD==phdr->p_type) {
unsigned step = (hi_paddr + phdr->p_align - 1) & ~(phdr->p_align - 1);
if (0==hi_paddr) { // first PT_LOAD
if (physical_start!=phdr->p_paddr) {
return 0;
}
delta_off = phdr->p_paddr - phdr->p_offset;
lo_paddr = phdr->p_paddr;
hi_paddr = phdr->p_filesz + phdr->p_paddr;
}
else if (step==phdr->p_paddr
&& delta_off==(phdr->p_paddr - phdr->p_offset)) {
hi_paddr = phdr->p_filesz + phdr->p_paddr;
}
else {
return 0; // Not equivalent to a .bin. Too complex for now.
}
}
}
// FIXME: ascending order is only a convention; might need sorting.
for (unsigned j=1; j < ehdr->e_shnum; ++j) {
if (shdr->SHT_PROGBITS==shdr->sh_type) { // SHT_REL might be intermixed
if (shdr->SHF_EXECINSTR & shdr[j].sh_flags) {
filter_len += shdr[j].sh_size; // FIXME: include sh_addralign
}
else {
break;
}
}
}
memmove(ibuf, (lo_paddr - delta_off) + ibuf, hi_paddr - lo_paddr); // FIXME: set_size
// FIXME: .bss ? Apparently handled by head.S
}
if (opt->force > 0)
return klen;
// some checks
if (fd_pos != file_size)
{
//printf("fd_pos: %ld, file_size: %ld\n", (long)fd_pos, (long)file_size);
// linux-2.6.21.5/arch/i386/boot/compressed/vmlinux.lds
// puts .data.compressed ahead of .text, .rodata, etc;
// so piggy.o need not be last in bzImage. Alas.
//throwCantPack("trailing bytes after kernel image; use option '-f' to force packing");
}
// see /usr/src/linux/arch/i386/kernel/head.S
// 2.4.x: [cli;] cld; mov $...,%eax
if (memcmp(ibuf, "\xFC\xB8", 2) == 0) goto head_ok;
if (memcmp(ibuf, "\xFA\xFC\xB8", 3) == 0) goto head_ok;
// 2.6.21.5 CONFIG_PARAVIRT mov %cs,%eax; test $3,%eax; jne ...;
if (memcmp(ibuf, "\x8c\xc8\xa9\x03\x00\x00\x00\x0f\x85", 9) == 0) goto head_ok;
if (memcmp(ibuf, "\x8c\xc8\xa8\x03\x0f\x85", 6) == 0) goto head_ok;
// 2.6.x: [cli;] cld; lgdt ...
if (memcmp(ibuf, "\xFC\x0F\x01", 3) == 0) goto head_ok;
if (memcmp(ibuf, "\xFA\xFC\x0F\x01", 4) == 0) goto head_ok;
// 2.6.x+grsecurity+strongswan+openwall+trustix: ljmp $0x10,...
if (ibuf[0] == 0xEA && memcmp(ibuf+5, "\x10\x00", 2) == 0) goto head_ok;
// x86_64 2.6.x
if (0xB8==ibuf[0] // mov $...,%eax
&& 0x8E==ibuf[5] && 0xD8==ibuf[6] // mov %eax,%ds
&& 0x0F==ibuf[7] && 0x01==ibuf[8] && 020==(070 & ibuf[9]) // lgdtl
&& 0xB8==ibuf[14] // mov $...,%eax
&& 0x0F==ibuf[19] && 0xA2==ibuf[20] // cpuid
) goto head_ok;
// cmpw $0x207,0x206(%esi) Debian vmlinuz-2.6.24-12-generic
if (0==memcmp("\x66\x81\xbe\x06\x02\x00\x00\x07\x02", ibuf, 9)) goto head_ok;
// testb $0x40,0x211(%esi) Fedora vmlinuz-2.6.25-0.218.rc8.git7.fc9.i686
if (0==memcmp("\xf6\x86\x11\x02\x00\x00\x40", ibuf, 7)) goto head_ok;
// rex.W prefix for x86_64
if (0x48==ibuf[0]) throwCantPack("x86_64 bzImage is not yet supported");
throwCantPack("unrecognized kernel architecture; use option '-f' to force packing");
head_ok:
// FIXME: more checks for special magic bytes in ibuf ???
// FIXME: more checks for kernel architecture ???
return klen;
}
return 0;
}
