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Change allocation strategy for memory block tracking and track begin/end rather than begin/size

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This commit is contained in:
Chris Eagle 2015-08-25 23:08:18 -07:00
parent cb8e05eb16
commit e11c0629f9
2 changed files with 13 additions and 8 deletions
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7
include/uc_priv.h
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@ -16,8 +16,8 @@
QTAILQ_HEAD(CPUTailQ, CPUState);
typedef struct MemoryBlock {
uint64_t begin;
size_t size;
uint64_t begin; //inclusive
uint64_t end; //exclusive
uint32_t perms;
} MemoryBlock;
@ -67,6 +67,9 @@ struct hook_struct {
// extend memory to keep 32 more hooks each time
#define HOOK_SIZE 32
//relloc increment, KEEP THIS A POWER OF 2!
#define MEM_BLOCK_INCR 32
struct uc_struct {
uc_arch arch;
uc_mode mode;

14
uc.c
View file

@ -548,13 +548,15 @@ uc_err uc_mem_map(uch handle, uint64_t address, size_t size)
if ((size & (4*1024 - 1)) != 0)
return UC_ERR_MAP;
blocks = realloc(uc->mapped_blocks, sizeof(MemoryBlock) * (uc->mapped_block_count + 1));
if (blocks == NULL) {
return UC_ERR_OOM;
if ((uc->mapped_block_count & (MEM_BLOCK_INCR - 1)) == 0) { //time to grow
blocks = realloc(uc->mapped_blocks, sizeof(MemoryBlock) * (uc->mapped_block_count + MEM_BLOCK_INCR));
if (blocks == NULL) {
return UC_ERR_OOM;
}
uc->mapped_blocks = blocks;
}
uc->mapped_blocks = blocks;
blocks[uc->mapped_block_count].begin = address;
blocks[uc->mapped_block_count].size = size;
blocks[uc->mapped_block_count].end = address + size;
//TODO extend uc_mem_map to accept permissions, figure out how to pass this down to qemu
blocks[uc->mapped_block_count].perms = UC_PROT_READ | UC_PROT_WRITE | UC_PROT_EXEC;
uc->memory_map(uc, address, size);
@ -568,7 +570,7 @@ bool memory_mapping(struct uc_struct* uc, uint64_t address)
unsigned int i;
for(i = 0; i < uc->mapped_block_count; i++) {
if (address >= uc->mapped_blocks[i].begin && address < (uc->mapped_blocks[i].begin + uc->mapped_blocks[i].size))
if (address >= uc->mapped_blocks[i].begin && address < uc->mapped_blocks[i].end)
return true;
}