diff options
Diffstat (limited to 'include')
| -rw-r--r-- | include/exec/memory.h | 16 | ||||
| -rw-r--r-- | include/hw/elf_ops.h | 13 |
2 files changed, 29 insertions, 0 deletions
diff --git a/include/exec/memory.h b/include/exec/memory.h index 63be794a06..4d5997e6bb 100644 --- a/include/exec/memory.h +++ b/include/exec/memory.h @@ -2908,6 +2908,22 @@ address_space_write_cached(MemoryRegionCache *cache, hwaddr addr, } } +/** + * address_space_set: Fill address space with a constant byte. + * + * Return a MemTxResult indicating whether the operation succeeded + * or failed (eg unassigned memory, device rejected the transaction, + * IOMMU fault). + * + * @as: #AddressSpace to be accessed + * @addr: address within that address space + * @c: constant byte to fill the memory + * @len: the number of bytes to fill with the constant byte + * @attrs: memory transaction attributes + */ +MemTxResult address_space_set(AddressSpace *as, hwaddr addr, + uint8_t c, hwaddr len, MemTxAttrs attrs); + #ifdef NEED_CPU_H /* enum device_endian to MemOp. */ static inline MemOp devend_memop(enum device_endian end) diff --git a/include/hw/elf_ops.h b/include/hw/elf_ops.h index 995de8495c..7c3b1d0f6c 100644 --- a/include/hw/elf_ops.h +++ b/include/hw/elf_ops.h @@ -555,6 +555,19 @@ static ssize_t glue(load_elf, SZ)(const char *name, int fd, if (res != MEMTX_OK) { goto fail; } + /* + * We need to zero'ify the space that is not copied + * from file + */ + if (file_size < mem_size) { + res = address_space_set(as ? as : &address_space_memory, + addr + file_size, 0, + mem_size - file_size, + MEMTXATTRS_UNSPECIFIED); + if (res != MEMTX_OK) { + goto fail; + } + } } } |