updated the new, which changed the display value static void setup(void) { int size = (unsigned int)(&_eheap - &_heap) - HDRSIZE; *((hdrtype_t *) hstart) = FREE_BLOCK(size); // printf("%s memory size:0x%x,begin:0x%x end:0x%x, hstart:0x%x\n",__func__,size,(unsigned int)&_heap,(unsigned int)&_eheap,(unsigned int )*((hdrtype_t *) hstart));
}
static void *alloc(int len) { hdrtype_t header; void *ptr = hstart; printf("%s %d length:0x%x,ptr=0x%x \n",__func__,__LINE__,len,(unsigned int )ptr); printf("%s %d memory begin:0x%x end:0x%x, hstart:0x%x\n",__func__,__LINE__,(unsigned int)&_heap,(unsigned int)&_eheap,(unsigned int ) hstart); /* Align the size. */ len = (len + 3) & ~3;
if (!len || len > 0xffffff) return (void *)NULL; // while(1);
/* Make sure the region is setup correctly. */ if (!HAS_MAGIC(*((hdrtype_t *) ptr))){ setup(); } if (!HAS_MAGIC(*((hdrtype_t *) ptr))){ printf("set up error,*ptr=0x%x\n",(unsigned int)*((hdrtype_t *) ptr)); }
/* Find some free space. */ do { header = *((hdrtype_t *) ptr); int size = SIZE(header);
if (!HAS_MAGIC(header) || size == 0) { printf("memory allocator panic!!! the size=0x%x. header=0x%x\n",size,(unsigned int)header); halt(); }
if (header & FLAG_FREE) { if (len <= size) { void *nptr = ptr + (HDRSIZE + len); int nsize = size - (HDRSIZE + len);
/* If there is still room in this block, * then mark it as such otherwise account * the whole space for that block. */
if (nsize > 0) { /* Mark the block as used. */ *((hdrtype_t *) ptr) = USED_BLOCK(len);
/* Create a new free block. */ *((hdrtype_t *) nptr) = FREE_BLOCK(nsize); } else { /* Mark the block as used. */ *((hdrtype_t *) ptr) = USED_BLOCK(size); }
return (void *)(ptr + HDRSIZE); } }
ptr += HDRSIZE + size;
} while (ptr < hend);
/* Nothing available. */ return (void *)NULL; } result log: Running option rom at ce00:0003 hello, initialize_usb 00:13.0 4387:1002.0 OHCI controller Not supported. 00:13.1 4388:1002.1 OHCI controller Not supported. 00:13.2 4389:1002.2 OHCI controller Not supported. 00:13.3 438a:1002.3 OHCI controller Not supported. 00:13.4 438b:1002.4 OHCI controller Not supported. 00:13.5 4386:1002.5 EHCI controller Not supported. 00:05.0 3038:1106.0 UHCI controller alloc 82 length:0x238,ptr=0x3077e0 alloc 83 memory begin:0x77e0 end:0x577e0, hstart:0x300000 set up error,*ptr=0xa2c0e2cc memory allocator panic!!! the size=0xc0e2cc. header=0xa2c0e2cc
On Sun, Aug 2, 2009 at 4:27 AM, Jason Wang wangqingpei@gmail.com wrote:
Hi all, I added some printf message into malloc.c, and find that the function setup() which used to init the memory seems not executed very well. I put my own malloc.c and the log attached to this mail. Hope some one can help me to find out the problems.
static void setup(void) { int size = (unsigned int)(&_eheap - &_heap) - HDRSIZE;
*((hdrtype_t *) hstart) = FREE_BLOCK(size); printf("%s the memory size:0x%x,begin:0x%x end:0x%x,hstart:0x%x\n",__func__,size,(unsigned int)&_heap,(unsigned int)&_eheap,(unsigned int )*((hdrtype_t *) hstart));
}
static void *alloc(int len) { hdrtype_t header; void *ptr = hstart; printf("%s length=0x%x, the ptr=0x%x\n",__func__,len,(unsigned int )*((hdrtype_t*)ptr)); printf("%s the memory begin:0x%x end:0x%x, hstart:0x%x\n",__func__,(unsigned int)&_heap,(unsigned int)&_eheap,(unsigned int )*((hdrtype_t *) hstart)); /* Align the size. */ len = (len + 3) & ~3;
if (!len || len > 0xffffff) return (void *)NULL; /* Make sure the region is setup correctly. */ if (!HAS_MAGIC(*((hdrtype_t *) ptr))) setup(); if (!HAS_MAGIC(*((hdrtype_t *) ptr))){ printf("set up failed,ptr=0x%x\n",(unsigned int)*((hdrtype_t *)ptr)); } /* Find some free space. */ do { header = *((hdrtype_t *) ptr); int size = SIZE(header);
if (!HAS_MAGIC(header) || size == 0) { printf("memory allocator panic!!! the size=0x%x.header=0x%x\n",size,(unsigned int)header); halt(); }
if (header & FLAG_FREE) { if (len <= size) { void *nptr = ptr + (HDRSIZE + len); int nsize = size - (HDRSIZE + len); /* If there is still room in this block, * then mark it as such otherwise account * the whole space for that block. */ if (nsize > 0) { /* Mark the block as used. */ *((hdrtype_t *) ptr) = USED_BLOCK(len); /* Create a new free block. */ *((hdrtype_t *) nptr) = FREE_BLOCK(nsize); } else { /* Mark the block as used. */ *((hdrtype_t *) ptr) = USED_BLOCK(size); } return (void *)(ptr + HDRSIZE); } } ptr += HDRSIZE + size; } while (ptr < hend); /* Nothing available. */ return (void *)NULL;} log: Attempting to init PCI bdf 06:05.0 (dev/ven 30381106) Copying option rom (size 130560) from 0xfff00000 to ce000 Checking rom 0x000ce000 (sig aa55 size 255) Running option rom at ce00:0003 hello, initialize_usb 00:13.0 4387:1002.0 OHCI controller Not supported. 00:13.1 4388:1002.1 OHCI controller Not supported. 00:13.2 4389:1002.2 OHCI controller Not supported. 00:13.3 438a:1002.3 OHCI controller Not supported. 00:13.4 438b:1002.4 OHCI controller Not supported. 00:13.5 4386:1002.5 EHCI controller Not supported. 00:05.0 3038:1106.0 UHCI controller alloc length=0x238, the ptr=0x0 alloc the memory begin:0x7860 end:0x57860, hstart:0x0 setup the memory size:0x4fffc,begin:0x7860 end:0x57860, hstart:0xaa04fffc set up failed,ptr=0x0 memory allocator panic!!! the size=0x0. header=0x0
-- Jason Wang Peking University