gvisor.dev/gvisor@v0.0.0-20240520182842-f9d4d51c7e0f/pkg/sentry/platform/systrap/sysmsg/sysmsg_offsets.h (about)

     1  // Copyright 2020 The gVisor Authors.
     2  //
     3  // Licensed under the Apache License, Version 2.0 (the "License");
     4  // you may not use this file except in compliance with the License.
     5  // You may obtain a copy of the License at
     6  //
     7  //     http://www.apache.org/licenses/LICENSE-2.0
     8  //
     9  // Unless required by applicable law or agreed to in writing, software
    10  // distributed under the License is distributed on an "AS IS" BASIS,
    11  // WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    12  // See the License for the specific language governing permissions and
    13  // limitations under the License.
    14  
    15  #ifndef THIRD_PARTY_GVISOR_PKG_SENTRY_PLATFORM_SYSTRAP_SYSMSG_SYSMSG_OFFSETS_H_
    16  #define THIRD_PARTY_GVISOR_PKG_SENTRY_PLATFORM_SYSTRAP_SYSMSG_SYSMSG_OFFSETS_H_
    17  
    18  // FAULT_OPCODE is the opcode of the invalid instruction that is used to replace
    19  // the first byte of the syscall instruction. More details in the description
    20  // for the pkg/sentry/platform/systrap/usertrap package.
    21  #define FAULT_OPCODE 0x06
    22  
    23  // The value for XCR0 is defined to xsave/xrstor everything except for PKRU and
    24  // AMX regions.
    25  // TODO(gvisor.dev/issues/9896): Implement AMX support.
    26  // TODO(gvisor.dev/issues/10087): Implement PKRU support.
    27  #define XCR0_DISABLED_MASK ((1 << 9) | (1 << 17) | (1 << 18))
    28  #define XCR0_EAX (0xffffffff ^ XCR0_DISABLED_MASK)
    29  #define XCR0_EDX 0xffffffff
    30  
    31  // LINT.IfChange
    32  #define MAX_FPSTATE_LEN 3584
    33  // Note: To be explicit, 2^12 = 4096; if ALLOCATED_SIZEOF_THREAD_CONTEXT_STRUCT
    34  //       is changed, make sure to change the code that relies on the bitshift.
    35  #define ALLOCATED_SIZEOF_THREAD_CONTEXT_STRUCT 4096
    36  #define THREAD_CONTEXT_STRUCT_BITSHIFT 12
    37  // LINT.ThenChange(sysmsg.go)
    38  
    39  // LINT.IfChange
    40  
    41  // Define offsets in the struct sysmsg to use them in assembly files.
    42  // Each offset has to have BUILD_BUG_ON in sighandler.c.
    43  #define offsetof_sysmsg_self 0x0
    44  #define offsetof_sysmsg_ret_addr 0x8
    45  #define offsetof_sysmsg_syshandler 0x10
    46  #define offsetof_sysmsg_syshandler_stack 0x18
    47  #define offsetof_sysmsg_app_stack 0x20
    48  #define offsetof_sysmsg_interrupt 0x28
    49  #define offsetof_sysmsg_state 0x2c
    50  #define offsetof_sysmsg_context 0x30
    51  
    52  #define offsetof_thread_context_fpstate 0x0
    53  #define offsetof_thread_context_fpstate_changed MAX_FPSTATE_LEN
    54  #define offsetof_thread_context_ptregs 0x8 + MAX_FPSTATE_LEN
    55  
    56  #define kTHREAD_STATE_NONE 0
    57  #define kTHREAD_STATE_INTERRUPT 3
    58  
    59  // LINT.ThenChange(sysmsg.h, sysmsg_lib.c)
    60  
    61  #endif  // THIRD_PARTY_GVISOR_PKG_SENTRY_PLATFORM_SYSTRAP_SYSMSG_SYSMSG_OFFSETS_H_