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better 16 bit code support

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git-svn-id: svn://svn.savannah.nongnu.org/qemu/trunk@38 c046a42c-6fe2-441c-8c8c-71466251a162
This commit is contained in:
bellard 2003-03-22 15:23:14 +00:00
parent e591824733
commit dab2ed991a
11 changed files with 597 additions and 218 deletions
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8
linux-user/main.c
View file

@ -179,7 +179,7 @@ int main(int argc, char **argv)
env->regs[R_EDI] = regs->edi;
env->regs[R_EBP] = regs->ebp;
env->regs[R_ESP] = regs->esp;
env->pc = regs->eip;
env->eip = regs->eip;
/* linux segment setup */
env->gdt.base = (void *)gdt_table;
@ -198,12 +198,12 @@ int main(int argc, char **argv)
uint8_t *pc;
err = cpu_x86_exec(env);
pc = env->seg_cache[R_CS].base + env->eip;
switch(err) {
case EXCP0D_GPF:
pc = (uint8_t *)env->pc;
if (pc[0] == 0xcd && pc[1] == 0x80) {
/* syscall */
env->pc += 2;
env->eip += 2;
env->regs[R_EAX] = do_syscall(env,
env->regs[R_EAX],
env->regs[R_EBX],
@ -219,7 +219,7 @@ int main(int argc, char **argv)
default:
trap_error:
fprintf(stderr, "0x%08lx: Unknown exception %d, aborting\n",
(long)env->pc, err);
(long)pc, err);
abort();
}
}

37
linux-user/syscall.c
View file

@ -53,6 +53,7 @@
#include <linux/cdrom.h>
#include <linux/hdreg.h>
#include <linux/soundcard.h>
#include <linux/dirent.h>
#include "gemu.h"
@ -63,13 +64,6 @@
#define PAGE_MASK ~(PAGE_SIZE - 1)
#endif
struct dirent {
long d_ino;
long d_off;
unsigned short d_reclen;
char d_name[256]; /* We must not include limits.h! */
};
//#include <linux/msdos_fs.h>
#define VFAT_IOCTL_READDIR_BOTH _IOR('r', 1, struct dirent [2])
#define VFAT_IOCTL_READDIR_SHORT _IOR('r', 2, struct dirent [2])
@ -86,6 +80,7 @@ struct dirent {
#define __NR_sys_statfs __NR_statfs
#define __NR_sys_fstatfs __NR_fstatfs
#define __NR_sys_getdents __NR_getdents
#define __NR_sys_getdents64 __NR_getdents64
#ifdef __NR_gettid
_syscall0(int, gettid)
@ -97,6 +92,7 @@ static int gettid(void) {
_syscall1(int,sys_uname,struct new_utsname *,buf)
_syscall2(int,sys_getcwd1,char *,buf,size_t,size)
_syscall3(int, sys_getdents, uint, fd, struct dirent *, dirp, uint, count);
_syscall3(int, sys_getdents64, uint, fd, struct dirent64 *, dirp, uint, count);
_syscall5(int, _llseek, uint, fd, ulong, hi, ulong, lo,
loff_t *, res, uint, wh);
_syscall2(int,sys_statfs,const char *,path,struct kernel_statfs *,buf)
@ -1005,7 +1001,7 @@ long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
ret = get_errno(setsid());
break;
case TARGET_NR_sigaction:
#if 0
#if 1
{
ret = 0;
}
@ -1336,6 +1332,7 @@ long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
{
struct dirent *dirp = (void *)arg2;
long count = arg3;
ret = get_errno(sys_getdents(arg1, dirp, count));
if (!is_error(ret)) {
struct dirent *de;
@ -1355,6 +1352,29 @@ long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
}
}
break;
case TARGET_NR_getdents64:
{
struct dirent64 *dirp = (void *)arg2;
long count = arg3;
ret = get_errno(sys_getdents64(arg1, dirp, count));
if (!is_error(ret)) {
struct dirent64 *de;
int len = ret;
int reclen;
de = dirp;
while (len > 0) {
reclen = tswap16(de->d_reclen);
if (reclen > len)
break;
de->d_reclen = reclen;
tswap64s(&de->d_ino);
tswap64s(&de->d_off);
de = (struct dirent64 *)((char *)de + reclen);
len -= reclen;
}
}
}
break;
case TARGET_NR__newselect:
ret = do_select(arg1, (void *)arg2, (void *)arg3, (void *)arg4,
(void *)arg5);
@ -1519,7 +1539,6 @@ long do_syscall(void *cpu_env, int num, long arg1, long arg2, long arg3,
case TARGET_NR_pivot_root:
case TARGET_NR_mincore:
case TARGET_NR_madvise:
case TARGET_NR_getdents64:
goto unimplemented;
#if TARGET_LONG_BITS == 32
case TARGET_NR_fcntl64:

16
linux-user/syscall_defs.h
View file

@ -75,6 +75,22 @@ struct kernel_statfs {
int f_spare[6];
};
struct target_dirent {
target_long d_ino;
target_long d_off;
unsigned short d_reclen;
char d_name[256]; /* We must not include limits.h! */
};
struct target_dirent64 {
uint64_t d_ino;
int64_t d_off;
unsigned short d_reclen;
unsigned char d_type;
char d_name[256];
};
/* mostly generic signal stuff */
#define TARGET_SIG_DFL ((target_long)0) /* default signal handling */
#define TARGET_SIG_IGN ((target_long)1) /* ignore signal */