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Implement the vm86 and vm86old system calls based on a patch

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from Alper Akcan. Fixes bug #118939.


git-svn-id: svn://svn.valgrind.org/valgrind/trunk@5635
This commit is contained in:
Tom Hughes 2006-02-11 16:26:46 +00:00
parent fb32c626b7
commit 3c2633355f
2 changed files with 104 additions and 2 deletions
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32
coregrind/m_syswrap/syswrap-x86-linux.c
View File

@ -772,6 +772,8 @@ DECL_TEMPLATE(x86_linux, sys_get_thread_area);
DECL_TEMPLATE(x86_linux, sys_ptrace);
DECL_TEMPLATE(x86_linux, sys_sigaction);
DECL_TEMPLATE(x86_linux, old_select);
DECL_TEMPLATE(x86_linux, sys_vm86old);
DECL_TEMPLATE(x86_linux, sys_vm86);
DECL_TEMPLATE(x86_linux, sys_syscall223);
PRE(old_select)
@ -1677,6 +1679,32 @@ POST(sys_sigaction)
POST_MEM_WRITE( ARG3, sizeof(struct vki_old_sigaction));
}
PRE(sys_vm86old)
{
PRINT("sys_vm86old ( %p )", ARG1);
PRE_REG_READ1(int, "vm86old", struct vm86_struct *, info);
PRE_MEM_WRITE( "vm86old(info)", ARG1, sizeof(struct vki_vm86_struct));
}
POST(sys_vm86old)
{
POST_MEM_WRITE( ARG1, sizeof(struct vki_vm86_struct));
}
PRE(sys_vm86)
{
PRINT("sys_vm86 ( %d, %p )", ARG1,ARG2);
PRE_REG_READ2(int, "vm86", unsigned long, fn, struct vm86plus_struct *, v86);
if (ARG1 == VKI_VM86_ENTER || ARG1 == VKI_VM86_ENTER_NO_BYPASS)
PRE_MEM_WRITE( "vm86(v86)", ARG2, sizeof(struct vki_vm86plus_struct));
}
POST(sys_vm86)
{
if (ARG1 == VKI_VM86_ENTER || ARG1 == VKI_VM86_ENTER_NO_BYPASS)
POST_MEM_WRITE( ARG2, sizeof(struct vki_vm86plus_struct));
}
/* ---------------------------------------------------------------
PRE/POST wrappers for x86/Linux-variant specific syscalls
@ -1869,7 +1897,7 @@ const SyscallTableEntry ML_(syscall_table)[] = {
GENX_(__NR_iopl, sys_iopl), // 110
LINX_(__NR_vhangup, sys_vhangup), // 111
GENX_(__NR_idle, sys_ni_syscall), // 112
//zz // (__NR_vm86old, sys_vm86old), // 113 x86/Linux-only
PLAXY(__NR_vm86old, sys_vm86old), // 113 x86/Linux-only
GENXY(__NR_wait4, sys_wait4), // 114
//zz
//zz // (__NR_swapoff, sys_swapoff), // 115 */Linux
@ -1935,7 +1963,7 @@ const SyscallTableEntry ML_(syscall_table)[] = {
LINX_(__NR_setresuid, sys_setresuid16), // 164
LINXY(__NR_getresuid, sys_getresuid16), // 165
//zz // (__NR_vm86, sys_vm86), // 166 x86/Linux-only
PLAXY(__NR_vm86, sys_vm86), // 166 x86/Linux-only
GENX_(__NR_query_module, sys_ni_syscall), // 167
GENXY(__NR_poll, sys_poll), // 168
//zz // (__NR_nfsservctl, sys_nfsservctl), // 169 */Linux

74
include/vki-x86-linux.h
View File

@ -785,6 +785,80 @@ struct vki_shminfo64 {
#define VKI_PTRACE_GETFPXREGS 18
#define VKI_PTRACE_SETFPXREGS 19
//----------------------------------------------------------------------
// From linux-2.6.15.4/include/asm-i386/vm86.h
//----------------------------------------------------------------------
#define VKI_VM86_PLUS_INSTALL_CHECK 0
#define VKI_VM86_ENTER 1
#define VKI_VM86_ENTER_NO_BYPASS 2
#define VKI_VM86_REQUEST_IRQ 3
#define VKI_VM86_FREE_IRQ 4
#define VKI_VM86_GET_IRQ_BITS 5
#define VKI_VM86_GET_AND_RESET_IRQ 6
struct vki_vm86_regs {
/*
* normal regs, with special meaning for the segment descriptors..
*/
long ebx;
long ecx;
long edx;
long esi;
long edi;
long ebp;
long eax;
long __null_ds;
long __null_es;
long __null_fs;
long __null_gs;
long orig_eax;
long eip;
unsigned short cs, __csh;
long eflags;
long esp;
unsigned short ss, __ssh;
/*
* these are specific to v86 mode:
*/
unsigned short es, __esh;
unsigned short ds, __dsh;
unsigned short fs, __fsh;
unsigned short gs, __gsh;
};
struct vki_revectored_struct {
unsigned long __map[8]; /* 256 bits */
};
struct vki_vm86_struct {
struct vki_vm86_regs regs;
unsigned long flags;
unsigned long screen_bitmap;
unsigned long cpu_type;
struct vki_revectored_struct int_revectored;
struct vki_revectored_struct int21_revectored;
};
struct vki_vm86plus_info_struct {
unsigned long force_return_for_pic:1;
unsigned long vm86dbg_active:1; /* for debugger */
unsigned long vm86dbg_TFpendig:1; /* for debugger */
unsigned long unused:28;
unsigned long is_vm86pus:1; /* for vm86 internal use */
unsigned char vm86dbg_intxxtab[32]; /* for debugger */
};
struct vki_vm86plus_struct {
struct vki_vm86_regs regs;
unsigned long flags;
unsigned long screen_bitmap;
unsigned long cpu_type;
struct vki_revectored_struct int_revectored;
struct vki_revectored_struct int21_revectored;
struct vki_vm86plus_info_struct vm86plus;
};
//----------------------------------------------------------------------
// And that's it!
//----------------------------------------------------------------------