| 1 | ; $Id: VMMR0JmpA-amd64.asm 100337 2023-06-30 23:53:06Z vboxsync $
|
|---|
| 2 | ;; @file
|
|---|
| 3 | ; VMM - R0 SetJmp / LongJmp routines for AMD64.
|
|---|
| 4 | ;
|
|---|
| 5 |
|
|---|
| 6 | ;
|
|---|
| 7 | ; Copyright (C) 2006-2023 Oracle and/or its affiliates.
|
|---|
| 8 | ;
|
|---|
| 9 | ; This file is part of VirtualBox base platform packages, as
|
|---|
| 10 | ; available from https://www.virtualbox.org.
|
|---|
| 11 | ;
|
|---|
| 12 | ; This program is free software; you can redistribute it and/or
|
|---|
| 13 | ; modify it under the terms of the GNU General Public License
|
|---|
| 14 | ; as published by the Free Software Foundation, in version 3 of the
|
|---|
| 15 | ; License.
|
|---|
| 16 | ;
|
|---|
| 17 | ; This program is distributed in the hope that it will be useful, but
|
|---|
| 18 | ; WITHOUT ANY WARRANTY; without even the implied warranty of
|
|---|
| 19 | ; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
|
|---|
| 20 | ; General Public License for more details.
|
|---|
| 21 | ;
|
|---|
| 22 | ; You should have received a copy of the GNU General Public License
|
|---|
| 23 | ; along with this program; if not, see <https://www.gnu.org/licenses>.
|
|---|
| 24 | ;
|
|---|
| 25 | ; SPDX-License-Identifier: GPL-3.0-only
|
|---|
| 26 | ;
|
|---|
| 27 |
|
|---|
| 28 | ;*********************************************************************************************************************************
|
|---|
| 29 | ;* Header Files *
|
|---|
| 30 | ;*********************************************************************************************************************************
|
|---|
| 31 | %define RT_ASM_WITH_SEH64_ALT
|
|---|
| 32 | %include "VBox/asmdefs.mac"
|
|---|
| 33 | %include "VMMInternal.mac"
|
|---|
| 34 | %include "VBox/err.mac"
|
|---|
| 35 | %include "VBox/param.mac"
|
|---|
| 36 |
|
|---|
| 37 |
|
|---|
| 38 | BEGINCODE
|
|---|
| 39 |
|
|---|
| 40 | ;;
|
|---|
| 41 | ; The setjmp variant used for calling Ring-3.
|
|---|
| 42 | ;
|
|---|
| 43 | ; This differs from the normal setjmp in that it will resume VMMRZCallRing3 if we're
|
|---|
| 44 | ; in the middle of a ring-3 call. Another differences is the function pointer and
|
|---|
| 45 | ; argument. This has to do with resuming code and the stack frame of the caller.
|
|---|
| 46 | ;
|
|---|
| 47 | ; @returns VINF_SUCCESS on success or whatever is passed to vmmR0CallRing3LongJmp.
|
|---|
| 48 | ; @param pJmpBuf msc:rcx gcc:rdi x86:[esp+0x04] Our jmp_buf.
|
|---|
| 49 | ; @param pfn msc:rdx gcc:rsi x86:[esp+0x08] The function to be called when not resuming.
|
|---|
| 50 | ; @param pvUser1 msc:r8 gcc:rdx x86:[esp+0x0c] The argument of that function.
|
|---|
| 51 | ; @param pvUser2 msc:r9 gcc:rcx x86:[esp+0x10] The argument of that function.
|
|---|
| 52 | ;
|
|---|
| 53 | GLOBALNAME vmmR0CallRing3SetJmp2
|
|---|
| 54 | GLOBALNAME vmmR0CallRing3SetJmpEx
|
|---|
| 55 | BEGINPROC vmmR0CallRing3SetJmp
|
|---|
| 56 | ;
|
|---|
| 57 | ; Save the registers.
|
|---|
| 58 | ;
|
|---|
| 59 | push rbp
|
|---|
| 60 | SEH64_PUSH_xBP
|
|---|
| 61 | mov rbp, rsp
|
|---|
| 62 | SEH64_SET_FRAME_xBP 0
|
|---|
| 63 | %ifdef ASM_CALL64_MSC
|
|---|
| 64 | sub rsp, 30h ; (10h is used by resume (??), 20h for callee spill area)
|
|---|
| 65 | SEH64_ALLOCATE_STACK 30h
|
|---|
| 66 | SEH64_END_PROLOGUE
|
|---|
| 67 | mov r11, rdx ; pfn
|
|---|
| 68 | mov rdx, rcx ; pJmpBuf;
|
|---|
| 69 | %else
|
|---|
| 70 | sub rsp, 10h ; (10h is used by resume (??))
|
|---|
| 71 | SEH64_ALLOCATE_STACK 10h
|
|---|
| 72 | SEH64_END_PROLOGUE
|
|---|
| 73 | mov r8, rdx ; pvUser1 (save it like MSC)
|
|---|
| 74 | mov r9, rcx ; pvUser2 (save it like MSC)
|
|---|
| 75 | mov r11, rsi ; pfn
|
|---|
| 76 | mov rdx, rdi ; pJmpBuf
|
|---|
| 77 | %endif
|
|---|
| 78 | mov [xDX + VMMR0JMPBUF.rbx], rbx
|
|---|
| 79 | %ifdef ASM_CALL64_MSC
|
|---|
| 80 | mov [xDX + VMMR0JMPBUF.rsi], rsi
|
|---|
| 81 | mov [xDX + VMMR0JMPBUF.rdi], rdi
|
|---|
| 82 | %endif
|
|---|
| 83 | mov [xDX + VMMR0JMPBUF.rbp], rbp
|
|---|
| 84 | mov [xDX + VMMR0JMPBUF.r12], r12
|
|---|
| 85 | mov [xDX + VMMR0JMPBUF.r13], r13
|
|---|
| 86 | mov [xDX + VMMR0JMPBUF.r14], r14
|
|---|
| 87 | mov [xDX + VMMR0JMPBUF.r15], r15
|
|---|
| 88 | mov xAX, [rbp + 8] ; (not really necessary, except for validity check)
|
|---|
| 89 | mov [xDX + VMMR0JMPBUF.rip], xAX
|
|---|
| 90 | %ifdef ASM_CALL64_MSC
|
|---|
| 91 | lea r10, [rsp + 20h] ; Must skip the callee spill area.
|
|---|
| 92 | %else
|
|---|
| 93 | mov r10, rsp
|
|---|
| 94 | %endif
|
|---|
| 95 | mov [xDX + VMMR0JMPBUF.rsp], r10
|
|---|
| 96 | %ifdef RT_OS_WINDOWS
|
|---|
| 97 | movdqa [xDX + VMMR0JMPBUF.xmm6], xmm6
|
|---|
| 98 | movdqa [xDX + VMMR0JMPBUF.xmm7], xmm7
|
|---|
| 99 | movdqa [xDX + VMMR0JMPBUF.xmm8], xmm8
|
|---|
| 100 | movdqa [xDX + VMMR0JMPBUF.xmm9], xmm9
|
|---|
| 101 | movdqa [xDX + VMMR0JMPBUF.xmm10], xmm10
|
|---|
| 102 | movdqa [xDX + VMMR0JMPBUF.xmm11], xmm11
|
|---|
| 103 | movdqa [xDX + VMMR0JMPBUF.xmm12], xmm12
|
|---|
| 104 | movdqa [xDX + VMMR0JMPBUF.xmm13], xmm13
|
|---|
| 105 | movdqa [xDX + VMMR0JMPBUF.xmm14], xmm14
|
|---|
| 106 | movdqa [xDX + VMMR0JMPBUF.xmm15], xmm15
|
|---|
| 107 | %endif
|
|---|
| 108 | pushf
|
|---|
| 109 | pop xAX
|
|---|
| 110 | mov [xDX + VMMR0JMPBUF.rflags], xAX
|
|---|
| 111 |
|
|---|
| 112 | ;
|
|---|
| 113 | ; Save the call then make it.
|
|---|
| 114 | ;
|
|---|
| 115 | mov [xDX + VMMR0JMPBUF.pfn], r11
|
|---|
| 116 | mov [xDX + VMMR0JMPBUF.pvUser1], r8
|
|---|
| 117 | mov [xDX + VMMR0JMPBUF.pvUser2], r9
|
|---|
| 118 |
|
|---|
| 119 | mov r12, rdx ; Save pJmpBuf.
|
|---|
| 120 | %ifdef ASM_CALL64_MSC
|
|---|
| 121 | mov rcx, r8 ; pvUser -> arg0
|
|---|
| 122 | mov rdx, r9
|
|---|
| 123 | %else
|
|---|
| 124 | mov rdi, r8 ; pvUser -> arg0
|
|---|
| 125 | mov rsi, r9
|
|---|
| 126 | %endif
|
|---|
| 127 | call r11
|
|---|
| 128 | mov rdx, r12 ; Restore pJmpBuf
|
|---|
| 129 |
|
|---|
| 130 | ;
|
|---|
| 131 | ; Return like in the long jump but clear eip, no shortcuts here.
|
|---|
| 132 | ;
|
|---|
| 133 | .proper_return:
|
|---|
| 134 | %ifdef RT_OS_WINDOWS
|
|---|
| 135 | movdqa xmm6, [xDX + VMMR0JMPBUF.xmm6 ]
|
|---|
| 136 | movdqa xmm7, [xDX + VMMR0JMPBUF.xmm7 ]
|
|---|
| 137 | movdqa xmm8, [xDX + VMMR0JMPBUF.xmm8 ]
|
|---|
| 138 | movdqa xmm9, [xDX + VMMR0JMPBUF.xmm9 ]
|
|---|
| 139 | movdqa xmm10, [xDX + VMMR0JMPBUF.xmm10]
|
|---|
| 140 | movdqa xmm11, [xDX + VMMR0JMPBUF.xmm11]
|
|---|
| 141 | movdqa xmm12, [xDX + VMMR0JMPBUF.xmm12]
|
|---|
| 142 | movdqa xmm13, [xDX + VMMR0JMPBUF.xmm13]
|
|---|
| 143 | movdqa xmm14, [xDX + VMMR0JMPBUF.xmm14]
|
|---|
| 144 | movdqa xmm15, [xDX + VMMR0JMPBUF.xmm15]
|
|---|
| 145 | %endif
|
|---|
| 146 | mov rbx, [xDX + VMMR0JMPBUF.rbx]
|
|---|
| 147 | %ifdef ASM_CALL64_MSC
|
|---|
| 148 | mov rsi, [xDX + VMMR0JMPBUF.rsi]
|
|---|
| 149 | mov rdi, [xDX + VMMR0JMPBUF.rdi]
|
|---|
| 150 | %endif
|
|---|
| 151 | mov r12, [xDX + VMMR0JMPBUF.r12]
|
|---|
| 152 | mov r13, [xDX + VMMR0JMPBUF.r13]
|
|---|
| 153 | mov r14, [xDX + VMMR0JMPBUF.r14]
|
|---|
| 154 | mov r15, [xDX + VMMR0JMPBUF.r15]
|
|---|
| 155 | mov rbp, [xDX + VMMR0JMPBUF.rbp]
|
|---|
| 156 | and qword [xDX + VMMR0JMPBUF.rip], byte 0 ; used for valid check.
|
|---|
| 157 | mov rsp, [xDX + VMMR0JMPBUF.rsp]
|
|---|
| 158 | push qword [xDX + VMMR0JMPBUF.rflags]
|
|---|
| 159 | popf
|
|---|
| 160 | leave
|
|---|
| 161 | ret
|
|---|
| 162 | ENDPROC vmmR0CallRing3SetJmp
|
|---|
| 163 |
|
|---|
| 164 |
|
|---|
| 165 | ;;
|
|---|
| 166 | ; Worker for VMMRZCallRing3.
|
|---|
| 167 | ; This will save the stack and registers.
|
|---|
| 168 | ;
|
|---|
| 169 | ; @param pJmpBuf msc:rcx gcc:rdi x86:[ebp+8] Pointer to the jump buffer.
|
|---|
| 170 | ; @param rc msc:rdx gcc:rsi x86:[ebp+c] The return code.
|
|---|
| 171 | ;
|
|---|
| 172 | BEGINPROC vmmR0CallRing3LongJmp
|
|---|
| 173 | ;
|
|---|
| 174 | ; Save the registers on the stack.
|
|---|
| 175 | ;
|
|---|
| 176 | push rbp
|
|---|
| 177 | SEH64_PUSH_xBP
|
|---|
| 178 | mov rbp, rsp
|
|---|
| 179 | SEH64_SET_FRAME_xBP 0
|
|---|
| 180 | push r15
|
|---|
| 181 | SEH64_PUSH_GREG r15
|
|---|
| 182 | push r14
|
|---|
| 183 | SEH64_PUSH_GREG r14
|
|---|
| 184 | push r13
|
|---|
| 185 | SEH64_PUSH_GREG r13
|
|---|
| 186 | push r12
|
|---|
| 187 | SEH64_PUSH_GREG r12
|
|---|
| 188 | %ifdef ASM_CALL64_MSC
|
|---|
| 189 | push rdi
|
|---|
| 190 | SEH64_PUSH_GREG rdi
|
|---|
| 191 | push rsi
|
|---|
| 192 | SEH64_PUSH_GREG rsi
|
|---|
| 193 | %endif
|
|---|
| 194 | push rbx
|
|---|
| 195 | SEH64_PUSH_GREG rbx
|
|---|
| 196 | pushf
|
|---|
| 197 | SEH64_ALLOCATE_STACK 8
|
|---|
| 198 | %ifdef RT_OS_WINDOWS
|
|---|
| 199 | sub rsp, 0a0h
|
|---|
| 200 | SEH64_ALLOCATE_STACK 0a0h
|
|---|
| 201 | movdqa [rsp + 000h], xmm6
|
|---|
| 202 | movdqa [rsp + 010h], xmm7
|
|---|
| 203 | movdqa [rsp + 020h], xmm8
|
|---|
| 204 | movdqa [rsp + 030h], xmm9
|
|---|
| 205 | movdqa [rsp + 040h], xmm10
|
|---|
| 206 | movdqa [rsp + 050h], xmm11
|
|---|
| 207 | movdqa [rsp + 060h], xmm12
|
|---|
| 208 | movdqa [rsp + 070h], xmm13
|
|---|
| 209 | movdqa [rsp + 080h], xmm14
|
|---|
| 210 | movdqa [rsp + 090h], xmm15
|
|---|
| 211 | %endif
|
|---|
| 212 | SEH64_END_PROLOGUE
|
|---|
| 213 |
|
|---|
| 214 | ;
|
|---|
| 215 | ; Normalize the parameters.
|
|---|
| 216 | ;
|
|---|
| 217 | %ifdef ASM_CALL64_MSC
|
|---|
| 218 | mov eax, edx ; rc
|
|---|
| 219 | mov rdx, rcx ; pJmpBuf
|
|---|
| 220 | %else
|
|---|
| 221 | mov rdx, rdi ; pJmpBuf
|
|---|
| 222 | mov eax, esi ; rc
|
|---|
| 223 | %endif
|
|---|
| 224 |
|
|---|
| 225 | ;
|
|---|
| 226 | ; Is the jump buffer armed?
|
|---|
| 227 | ;
|
|---|
| 228 | cmp qword [xDX + VMMR0JMPBUF.rip], byte 0
|
|---|
| 229 | je .nok
|
|---|
| 230 |
|
|---|
| 231 | ;
|
|---|
| 232 | ; Also check that the stack is in the vicinity of the RSP we entered
|
|---|
| 233 | ; on so the stack mirroring below doesn't go wild.
|
|---|
| 234 | ;
|
|---|
| 235 | mov rsi, rsp
|
|---|
| 236 | mov rcx, [xDX + VMMR0JMPBUF.rsp]
|
|---|
| 237 | sub rcx, rsi
|
|---|
| 238 | cmp rcx, _64K
|
|---|
| 239 | jnbe .nok
|
|---|
| 240 |
|
|---|
| 241 | ;
|
|---|
| 242 | ; Save a PC and return PC here to assist unwinding.
|
|---|
| 243 | ;
|
|---|
| 244 | .unwind_point:
|
|---|
| 245 | lea rcx, [.unwind_point wrt RIP]
|
|---|
| 246 | mov [xDX + VMMR0JMPBUF.UnwindPc], rcx
|
|---|
| 247 | mov rcx, [xDX + VMMR0JMPBUF.rbp]
|
|---|
| 248 | lea rcx, [rcx + 8]
|
|---|
| 249 | mov [xDX + VMMR0JMPBUF.UnwindRetPcLocation], rcx
|
|---|
| 250 | mov rcx, [rcx]
|
|---|
| 251 | mov [xDX + VMMR0JMPBUF.UnwindRetPcValue], rcx
|
|---|
| 252 |
|
|---|
| 253 | ; Save RSP & RBP to enable stack dumps
|
|---|
| 254 | mov [xDX + VMMR0JMPBUF.UnwindSp], rsp
|
|---|
| 255 | mov rcx, rbp
|
|---|
| 256 | mov [xDX + VMMR0JMPBUF.UnwindBp], rcx
|
|---|
| 257 | sub rcx, 8
|
|---|
| 258 | mov [xDX + VMMR0JMPBUF.UnwindRetSp], rcx
|
|---|
| 259 |
|
|---|
| 260 | ;
|
|---|
| 261 | ; Make sure the direction flag is clear before we do any rep movsb below.
|
|---|
| 262 | ;
|
|---|
| 263 | cld
|
|---|
| 264 |
|
|---|
| 265 | ;
|
|---|
| 266 | ; Mirror the stack.
|
|---|
| 267 | ;
|
|---|
| 268 | xor ebx, ebx
|
|---|
| 269 |
|
|---|
| 270 | mov rdi, [xDX + VMMR0JMPBUF.pvStackBuf]
|
|---|
| 271 | or rdi, rdi
|
|---|
| 272 | jz .skip_stack_mirroring
|
|---|
| 273 |
|
|---|
| 274 | mov ebx, [xDX + VMMR0JMPBUF.cbStackBuf]
|
|---|
| 275 | or ebx, ebx
|
|---|
| 276 | jz .skip_stack_mirroring
|
|---|
| 277 |
|
|---|
| 278 | mov rcx, [xDX + VMMR0JMPBUF.rsp]
|
|---|
| 279 | sub rcx, rsp
|
|---|
| 280 | and rcx, ~0fffh ; copy up to the page boundrary
|
|---|
| 281 |
|
|---|
| 282 | cmp rcx, rbx ; rbx = rcx = RT_MIN(rbx, rcx);
|
|---|
| 283 | jbe .do_stack_buffer_big_enough
|
|---|
| 284 | mov ecx, ebx ; too much to copy, limit to ebx
|
|---|
| 285 | jmp .do_stack_copying
|
|---|
| 286 | .do_stack_buffer_big_enough:
|
|---|
| 287 | mov ebx, ecx ; ecx is smaller, update ebx for cbStackValid
|
|---|
| 288 |
|
|---|
| 289 | .do_stack_copying:
|
|---|
| 290 | mov rsi, rsp
|
|---|
| 291 | rep movsb
|
|---|
| 292 |
|
|---|
| 293 | .skip_stack_mirroring:
|
|---|
| 294 | mov [xDX + VMMR0JMPBUF.cbStackValid], ebx
|
|---|
| 295 |
|
|---|
| 296 | ;
|
|---|
| 297 | ; Do buffer mirroring.
|
|---|
| 298 | ;
|
|---|
| 299 | mov rdi, [xDX + VMMR0JMPBUF.pMirrorBuf]
|
|---|
| 300 | or rdi, rdi
|
|---|
| 301 | jz .skip_buffer_mirroring
|
|---|
| 302 | mov rsi, rdx
|
|---|
| 303 | mov ecx, VMMR0JMPBUF_size
|
|---|
| 304 | rep movsb
|
|---|
| 305 | .skip_buffer_mirroring:
|
|---|
| 306 |
|
|---|
| 307 | ;
|
|---|
| 308 | ; Do the long jump.
|
|---|
| 309 | ;
|
|---|
| 310 | %ifdef RT_OS_WINDOWS
|
|---|
| 311 | movdqa xmm6, [xDX + VMMR0JMPBUF.xmm6 ]
|
|---|
| 312 | movdqa xmm7, [xDX + VMMR0JMPBUF.xmm7 ]
|
|---|
| 313 | movdqa xmm8, [xDX + VMMR0JMPBUF.xmm8 ]
|
|---|
| 314 | movdqa xmm9, [xDX + VMMR0JMPBUF.xmm9 ]
|
|---|
| 315 | movdqa xmm10, [xDX + VMMR0JMPBUF.xmm10]
|
|---|
| 316 | movdqa xmm11, [xDX + VMMR0JMPBUF.xmm11]
|
|---|
| 317 | movdqa xmm12, [xDX + VMMR0JMPBUF.xmm12]
|
|---|
| 318 | movdqa xmm13, [xDX + VMMR0JMPBUF.xmm13]
|
|---|
| 319 | movdqa xmm14, [xDX + VMMR0JMPBUF.xmm14]
|
|---|
| 320 | movdqa xmm15, [xDX + VMMR0JMPBUF.xmm15]
|
|---|
| 321 | %endif
|
|---|
| 322 | mov rbx, [xDX + VMMR0JMPBUF.rbx]
|
|---|
| 323 | %ifdef ASM_CALL64_MSC
|
|---|
| 324 | mov rsi, [xDX + VMMR0JMPBUF.rsi]
|
|---|
| 325 | mov rdi, [xDX + VMMR0JMPBUF.rdi]
|
|---|
| 326 | %endif
|
|---|
| 327 | mov r12, [xDX + VMMR0JMPBUF.r12]
|
|---|
| 328 | mov r13, [xDX + VMMR0JMPBUF.r13]
|
|---|
| 329 | mov r14, [xDX + VMMR0JMPBUF.r14]
|
|---|
| 330 | mov r15, [xDX + VMMR0JMPBUF.r15]
|
|---|
| 331 | mov rbp, [xDX + VMMR0JMPBUF.rbp]
|
|---|
| 332 | mov rsp, [xDX + VMMR0JMPBUF.rsp]
|
|---|
| 333 | push qword [xDX + VMMR0JMPBUF.rflags]
|
|---|
| 334 | popf
|
|---|
| 335 | leave
|
|---|
| 336 | ret
|
|---|
| 337 |
|
|---|
| 338 | ;
|
|---|
| 339 | ; Failure
|
|---|
| 340 | ;
|
|---|
| 341 | .nok:
|
|---|
| 342 | mov eax, VERR_VMM_LONG_JMP_ERROR
|
|---|
| 343 | %ifdef RT_OS_WINDOWS
|
|---|
| 344 | add rsp, 0a0h ; skip XMM registers since they are unmodified.
|
|---|
| 345 | %endif
|
|---|
| 346 | popf
|
|---|
| 347 | pop rbx
|
|---|
| 348 | %ifdef ASM_CALL64_MSC
|
|---|
| 349 | pop rsi
|
|---|
| 350 | pop rdi
|
|---|
| 351 | %endif
|
|---|
| 352 | pop r12
|
|---|
| 353 | pop r13
|
|---|
| 354 | pop r14
|
|---|
| 355 | pop r15
|
|---|
| 356 | leave
|
|---|
| 357 | ret
|
|---|
| 358 | ENDPROC vmmR0CallRing3LongJmp
|
|---|
| 359 |
|
|---|
