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https://github.com/xemu-project/xemu.git
synced 2024-11-23 19:49:43 +00:00
removed unused code
git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@2080 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard
parent
e7b81015e5
commit
7f1a8398ab
238
osdep.c
238
osdep.c
@ -33,242 +33,6 @@
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#include "vl.h"
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#endif
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#if defined(__i386__) && !defined(CONFIG_SOFTMMU) && !defined(CONFIG_USER_ONLY)
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#include <sys/mman.h>
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#include <sys/ipc.h>
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/* When not using soft mmu, libc independant functions are needed for
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the CPU core because it needs to use alternates stacks and
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libc/thread incompatibles settings */
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#include <linux/unistd.h>
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#define QEMU_SYSCALL0(name) \
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{ \
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long __res; \
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__asm__ volatile ("int $0x80" \
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: "=a" (__res) \
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: "0" (__NR_##name)); \
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return __res; \
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}
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#define QEMU_SYSCALL1(name,arg1) \
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{ \
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long __res; \
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__asm__ volatile ("int $0x80" \
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: "=a" (__res) \
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: "0" (__NR_##name),"b" ((long)(arg1))); \
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return __res; \
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}
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#define QEMU_SYSCALL2(name,arg1,arg2) \
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{ \
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long __res; \
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__asm__ volatile ("int $0x80" \
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: "=a" (__res) \
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: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2))); \
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return __res; \
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}
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#define QEMU_SYSCALL3(name,arg1,arg2,arg3) \
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{ \
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long __res; \
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__asm__ volatile ("int $0x80" \
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: "=a" (__res) \
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: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
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"d" ((long)(arg3))); \
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return __res; \
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}
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#define QEMU_SYSCALL4(name,arg1,arg2,arg3,arg4) \
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{ \
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long __res; \
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__asm__ volatile ("int $0x80" \
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: "=a" (__res) \
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: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
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"d" ((long)(arg3)),"S" ((long)(arg4))); \
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return __res; \
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}
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#define QEMU_SYSCALL5(name,arg1,arg2,arg3,arg4,arg5) \
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{ \
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long __res; \
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__asm__ volatile ("int $0x80" \
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: "=a" (__res) \
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: "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
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"d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5))); \
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return __res; \
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}
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#define QEMU_SYSCALL6(name,arg1,arg2,arg3,arg4,arg5,arg6) \
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{ \
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long __res; \
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__asm__ volatile ("push %%ebp ; movl %%eax,%%ebp ; movl %1,%%eax ; int $0x80 ; pop %%ebp" \
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: "=a" (__res) \
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: "i" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \
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"d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5)), \
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"0" ((long)(arg6))); \
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return __res; \
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}
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/****************************************************************/
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/* shmat replacement */
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int qemu_ipc(int call, unsigned long first,
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unsigned long second, unsigned long third,
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void *ptr, unsigned long fifth)
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{
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QEMU_SYSCALL6(ipc, call, first, second, third, ptr, fifth);
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}
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#define SHMAT 21
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/* we must define shmat so that a specific address will be used when
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mapping the X11 ximage */
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void *shmat(int shmid, const void *shmaddr, int shmflg)
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{
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void *ptr;
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int ret;
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/* we give an address in the right memory area */
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if (!shmaddr)
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shmaddr = get_mmap_addr(8192 * 1024);
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ret = qemu_ipc(SHMAT, shmid, shmflg, (unsigned long)&ptr, (void *)shmaddr, 0);
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if (ret < 0)
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return NULL;
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return ptr;
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}
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/****************************************************************/
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/* sigaction bypassing the threads */
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static int kernel_sigaction(int signum, const struct qemu_sigaction *act,
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struct qemu_sigaction *oldact,
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int sigsetsize)
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{
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QEMU_SYSCALL4(rt_sigaction, signum, act, oldact, sigsetsize);
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}
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int qemu_sigaction(int signum, const struct qemu_sigaction *act,
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struct qemu_sigaction *oldact)
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{
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return kernel_sigaction(signum, act, oldact, 8);
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}
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/****************************************************************/
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/* memory allocation */
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//#define DEBUG_MALLOC
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#define MALLOC_BASE 0xab000000
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#define PHYS_RAM_BASE 0xac000000
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#define MALLOC_ALIGN 16
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#define BLOCK_HEADER_SIZE 16
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typedef struct MemoryBlock {
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struct MemoryBlock *next;
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unsigned long size; /* size of block, including header */
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} MemoryBlock;
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static MemoryBlock *first_free_block;
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static unsigned long malloc_addr = MALLOC_BASE;
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static void *malloc_get_space(size_t size)
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{
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void *ptr;
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size = TARGET_PAGE_ALIGN(size);
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ptr = mmap((void *)malloc_addr, size,
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PROT_WRITE | PROT_READ,
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MAP_PRIVATE | MAP_FIXED | MAP_ANON, -1, 0);
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if (ptr == MAP_FAILED)
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return NULL;
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malloc_addr += size;
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return ptr;
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}
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void *qemu_malloc(size_t size)
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{
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MemoryBlock *mb, *mb1, **pmb;
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void *ptr;
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size_t size1, area_size;
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if (size == 0)
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return NULL;
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size = (size + BLOCK_HEADER_SIZE + MALLOC_ALIGN - 1) & ~(MALLOC_ALIGN - 1);
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pmb = &first_free_block;
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for(;;) {
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mb = *pmb;
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if (mb == NULL)
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break;
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if (size <= mb->size)
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goto found;
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pmb = &mb->next;
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}
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/* no big enough blocks found: get new space */
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area_size = TARGET_PAGE_ALIGN(size);
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mb = malloc_get_space(area_size);
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if (!mb)
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return NULL;
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size1 = area_size - size;
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if (size1 > 0) {
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/* create a new free block */
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mb1 = (MemoryBlock *)((uint8_t *)mb + size);
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mb1->next = NULL;
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mb1->size = size1;
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*pmb = mb1;
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}
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goto the_end;
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found:
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/* a free block was found: use it */
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size1 = mb->size - size;
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if (size1 > 0) {
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/* create a new free block */
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mb1 = (MemoryBlock *)((uint8_t *)mb + size);
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mb1->next = mb->next;
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mb1->size = size1;
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*pmb = mb1;
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} else {
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/* suppress the first block */
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*pmb = mb->next;
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}
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the_end:
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mb->size = size;
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mb->next = NULL;
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ptr = ((uint8_t *)mb + BLOCK_HEADER_SIZE);
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#ifdef DEBUG_MALLOC
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qemu_printf("malloc: size=0x%x ptr=0x%lx\n", size, (unsigned long)ptr);
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#endif
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return ptr;
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}
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void qemu_free(void *ptr)
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{
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MemoryBlock *mb;
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if (!ptr)
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return;
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mb = (MemoryBlock *)((uint8_t *)ptr - BLOCK_HEADER_SIZE);
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mb->next = first_free_block;
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first_free_block = mb;
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}
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/****************************************************************/
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/* virtual memory allocation */
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unsigned long mmap_addr = PHYS_RAM_BASE;
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void *get_mmap_addr(unsigned long size)
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{
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unsigned long addr;
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addr = mmap_addr;
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mmap_addr += ((size + 4095) & ~4095) + 4096;
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return (void *)addr;
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}
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#else
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#ifdef _WIN32
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#include <windows.h>
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#elif defined(_BSD)
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@ -424,8 +188,6 @@ void qemu_vfree(void *ptr)
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#endif
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#endif
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void *qemu_mallocz(size_t size)
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{
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void *ptr;
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35
osdep.h
35
osdep.h
@ -15,39 +15,4 @@ void qemu_vfree(void *ptr);
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void *get_mmap_addr(unsigned long size);
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/* specific kludges for OS compatibility (should be moved elsewhere) */
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#if defined(__i386__) && !defined(CONFIG_SOFTMMU) && !defined(CONFIG_USER_ONLY)
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/* disabled pthread version of longjmp which prevent us from using an
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alternative signal stack */
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extern void __longjmp(jmp_buf env, int val);
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#define longjmp __longjmp
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#include <signal.h>
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struct siginfo;
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/* NOTE: it works only because the glibc sigset_t is >= kernel sigset_t */
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struct qemu_sigaction {
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union {
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void (*_sa_handler)(int);
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void (*_sa_sigaction)(int, struct siginfo *, void *);
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} _u;
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unsigned long sa_flags;
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void (*sa_restorer)(void);
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sigset_t sa_mask; /* mask last for extensibility */
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};
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int qemu_sigaction(int signum, const struct qemu_sigaction *act,
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struct qemu_sigaction *oldact);
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#undef sigaction
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#undef sa_handler
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#undef sa_sigaction
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#define sigaction qemu_sigaction
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#define sa_handler _u._sa_handler
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#define sa_sigaction _u._sa_sigaction
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#endif
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#endif
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