palacios/src/palacios/vmx_lowlevel.S

   1
   2 #define VMX_SUCCESS         0
   3 #define VMX_FAIL_INVALID    1
   4 #define VMX_FAIL_VALID      2
   5
   6 #define VMCS_HOST_RSP       0x00006C14
   7
   8 #if defined(__V3_64BIT__)
   9
  10 #define r(reg) %r##reg
  11
  12 #define PUSHA    \
  13     push %rax;   \
  14     push %rbx;   \
  15     push %rcx;   \
  16     push %rdx;   \
  17     push %rbp;   \
  18     push %rdi;   \
  19     push %rsi;   \
  20     push %r8 ;   \
  21     push %r9 ;   \
  22     push %r10;   \
  23     push %r11;   \
  24     push %r12;   \
  25     push %r13;   \
  26     push %r14;   \
  27     push %r15;
  28
  29 #define POPA     \
  30     pop %r15;    \
  31     pop %r14;    \
  32     pop %r13;    \
  33     pop %r12;    \
  34     pop %r11;    \
  35     pop %r10;    \
  36     pop %r9 ;    \
  37     pop %r8 ;    \
  38     pop %rsi;    \
  39     pop %rdi;    \
  40     pop %rbp;    \
  41     pop %rdx;    \
  42     pop %rcx;    \
  43     pop %rbx;    \
  44     pop %rax;
  45 #else
  46
  47 #define r(reg) %e##reg
  48
  49 #define PUSHA    \
  50     push %eax;   \
  51     push %ebx;   \
  52     push %ecx;   \
  53     push %edx;   \
  54     push %ebp;   \
  55     push %edi;   \
  56     push %esi;
  57
  58 #define POPA     \
  59     pop %esi;    \
  60     pop %edi;    \
  61     pop %ebp;    \
  62     pop %edx;    \
  63     pop %ecx;    \
  64     pop %ebx;    \
  65     pop %eax;
  66
  67 #endif
  68
  69 .align 8
  70 .globl v3_vmx_exit_handler
  71 v3_vmx_exit_handler:
  72     PUSHA
  73     call v3_vmx_handle_exit
  74     POPA
  75
  76 v3_vmx_vmresume:
  77     vmresume
  78     sti
  79     jz .Lfail_valid
  80     jc .Lfail_invalid
  81     jmp .Lreturn
  82
  83 .globl v3_vmx_vmlaunch
  84 v3_vmx_vmlaunch:
  85     cli
  86     pushf
  87     PUSHA
  88
  89     mov r(sp), r(ax)
  90     mov $VMCS_HOST_RSP, r(bx)
  91     vmwrite r(bx), r(ax)
  92     jz .Lfail_valid
  93     jc .Lfail_invalid
  94
  95     vmlaunch
  96     sti
  97     jz .Lfail_valid
  98     jc .Lfail_invalid
  99     jmp .Lreturn
 100
 101 .Lfail_valid:
 102     mov $VMX_FAIL_VALID, r(ax)
 103     jmp .Lreturn
 104
 105 .Lfail_invalid:
 106     mov $VMX_FAIL_INVALID, r(ax)
 107     jmp .Lreturn
 108
 109 .Lreturn:
 110     POPA
 111     popf
 112     ret
 113
 114
 115
 116