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linux-user: Use qemu-malloc.c. 

Since we're no longer setting PAGE_RESERVED, there's no need to
implement qemu_malloc via mmap.

Signed-off-by: Richard Henderson <rth@twiddle.net>
Signed-off-by: Aurelien Jarno <aurelien@aurel32.net>
This commit is contained in:
Richard Henderson 2010-05-21 10:37:52 -07:00 committed by Aurelien Jarno
parent 50401022d8
commit 680c877af4
2 changed files with 2 additions and 53 deletions
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3
Makefile.target
View File

@ -85,7 +85,8 @@ $(call set-vpath, $(SRC_PATH)/linux-user:$(SRC_PATH)/linux-user/$(TARGET_ABI_DIR
QEMU_CFLAGS+=-I$(SRC_PATH)/linux-user -I$(SRC_PATH)/linux-user/$(TARGET_ABI_DIR)
obj-y = main.o syscall.o strace.o mmap.o signal.o thunk.o \
elfload.o linuxload.o uaccess.o gdbstub.o cpu-uname.o
elfload.o linuxload.o uaccess.o gdbstub.o cpu-uname.o \
qemu-malloc.o
obj-$(TARGET_HAS_BFLT) += flatload.o

52
linux-user/mmap.c
View File

@ -77,58 +77,6 @@ void mmap_unlock(void)
}
#endif
void *qemu_vmalloc(size_t size)
{
void *p;
mmap_lock();
/* Use map and mark the pages as used. */
p = mmap(NULL, size, PROT_READ | PROT_WRITE,
MAP_PRIVATE | MAP_ANONYMOUS, -1, 0);
mmap_unlock();
return p;
}
void *qemu_malloc(size_t size)
{
char * p;
size += 16;
p = qemu_vmalloc(size);
*(size_t *)p = size;
return p + 16;
}
/* We use map, which is always zero initialized. */
void * qemu_mallocz(size_t size)
{
return qemu_malloc(size);
}
void qemu_free(void *ptr)
{
/* FIXME: We should unmark the reserved pages here. However this gets
complicated when one target page spans multiple host pages, so we
don't bother. */
size_t *p;
p = (size_t *)((char *)ptr - 16);
munmap(p, *p);
}
void *qemu_realloc(void *ptr, size_t size)
{
size_t old_size, copy;
void *new_ptr;
if (!ptr)
return qemu_malloc(size);
old_size = *(size_t *)((char *)ptr - 16);
copy = old_size < size ? old_size : size;
new_ptr = qemu_malloc(size);
memcpy(new_ptr, ptr, copy);
qemu_free(ptr);
return new_ptr;
}
/* NOTE: all the constants are the HOST ones, but addresses are target. */
int target_mprotect(abi_ulong start, abi_ulong len, int prot)
{