[PATCH] ppc64 boot: remove zlib
Switch ppc64 to the in-kernel zlib, it has less bugs than the current one.
The code in arch/ppc64/boot is compiled as 32bit, so it can not use the
includes from include/asm.
Copy all zlib related header files and convert them with sed.
Reduce the scratch size to 47k, check possible changes at runtime.
Signed-off-by: Olaf Hering <olh@suse.de>
Cc: Benjamin Herrenschmidt <benh@kernel.crashing.org>
Cc: Anton Blanchard <anton@samba.org>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Paul Mackerras <paulus@samba.org>
diff --git a/arch/ppc64/boot/main.c b/arch/ppc64/boot/main.c
index f7ec19a..0b95ccf 100644
--- a/arch/ppc64/boot/main.c
+++ b/arch/ppc64/boot/main.c
@@ -26,12 +26,6 @@
#define RAM_END (512<<20) // Fixme: use OF */
#define ONE_MB 0x100000
-static char *avail_ram;
-static char *begin_avail, *end_avail;
-static char *avail_high;
-static unsigned int heap_use;
-static unsigned int heap_max;
-
extern char _start[];
extern char _end[];
extern char _vmlinux_start[];
@@ -50,7 +44,8 @@
static struct addr_range vmlinuz = {0, 0, 0};
static struct addr_range initrd = {0, 0, 0};
-static char scratch[128<<10]; /* 128kB of scratch space for gunzip */
+static char scratch[46912]; /* scratch space for gunzip, from zlib_inflate_workspacesize() */
+
typedef void (*kernel_entry_t)( unsigned long,
unsigned long,
@@ -161,17 +156,12 @@
/* Eventually gunzip the kernel */
if (*(unsigned short *)vmlinuz.addr == 0x1f8b) {
int len;
- avail_ram = scratch;
- begin_avail = avail_high = avail_ram;
- end_avail = scratch + sizeof(scratch);
printf("gunzipping (0x%lx <- 0x%lx:0x%0lx)...",
vmlinux.addr, vmlinuz.addr, vmlinuz.addr+vmlinuz.size);
len = vmlinuz.size;
gunzip((void *)vmlinux.addr, vmlinux.size,
(unsigned char *)vmlinuz.addr, &len);
printf("done 0x%lx bytes\n\r", len);
- printf("0x%x bytes of heap consumed, max in use 0x%x\n\r",
- (unsigned)(avail_high - begin_avail), heap_max);
} else {
memmove((void *)vmlinux.addr,(void *)vmlinuz.addr,vmlinuz.size);
}
@@ -225,64 +215,12 @@
exit();
}
-struct memchunk {
- unsigned int size;
- unsigned int pad;
- struct memchunk *next;
-};
-
-static struct memchunk *freechunks;
-
-void *zalloc(void *x, unsigned items, unsigned size)
-{
- void *p;
- struct memchunk **mpp, *mp;
-
- size *= items;
- size = _ALIGN(size, sizeof(struct memchunk));
- heap_use += size;
- if (heap_use > heap_max)
- heap_max = heap_use;
- for (mpp = &freechunks; (mp = *mpp) != 0; mpp = &mp->next) {
- if (mp->size == size) {
- *mpp = mp->next;
- return mp;
- }
- }
- p = avail_ram;
- avail_ram += size;
- if (avail_ram > avail_high)
- avail_high = avail_ram;
- if (avail_ram > end_avail) {
- printf("oops... out of memory\n\r");
- pause();
- }
- return p;
-}
-
-void zfree(void *x, void *addr, unsigned nb)
-{
- struct memchunk *mp = addr;
-
- nb = _ALIGN(nb, sizeof(struct memchunk));
- heap_use -= nb;
- if (avail_ram == addr + nb) {
- avail_ram = addr;
- return;
- }
- mp->size = nb;
- mp->next = freechunks;
- freechunks = mp;
-}
-
#define HEAD_CRC 2
#define EXTRA_FIELD 4
#define ORIG_NAME 8
#define COMMENT 0x10
#define RESERVED 0xe0
-#define DEFLATED 8
-
static void gunzip(void *dst, int dstlen, unsigned char *src, int *lenp)
{
z_stream s;
@@ -291,7 +229,7 @@
/* skip header */
i = 10;
flags = src[3];
- if (src[2] != DEFLATED || (flags & RESERVED) != 0) {
+ if (src[2] != Z_DEFLATED || (flags & RESERVED) != 0) {
printf("bad gzipped data\n\r");
exit();
}
@@ -310,9 +248,13 @@
exit();
}
- s.zalloc = zalloc;
- s.zfree = zfree;
- r = inflateInit2(&s, -MAX_WBITS);
+ if (zlib_inflate_workspacesize() > sizeof(scratch)) {
+ printf("gunzip needs more mem\n");
+ exit();
+ }
+ memset(&s, 0, sizeof(s));
+ s.workspace = scratch;
+ r = zlib_inflateInit2(&s, -MAX_WBITS);
if (r != Z_OK) {
printf("inflateInit2 returned %d\n\r", r);
exit();
@@ -321,12 +263,12 @@
s.avail_in = *lenp - i;
s.next_out = dst;
s.avail_out = dstlen;
- r = inflate(&s, Z_FINISH);
+ r = zlib_inflate(&s, Z_FINISH);
if (r != Z_OK && r != Z_STREAM_END) {
printf("inflate returned %d msg: %s\n\r", r, s.msg);
exit();
}
*lenp = s.next_out - (unsigned char *) dst;
- inflateEnd(&s);
+ zlib_inflateEnd(&s);
}