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Linux/tools/testing/selftests/sgx/test_encl_bootstrap.S

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Diff markup

Differences between /tools/testing/selftests/sgx/test_encl_bootstrap.S (Architecture i386) and /tools/testing/selftests/sgx/test_encl_bootstrap.S (Architecture m68k)


  1 /* SPDX-License-Identifier: GPL-2.0 */              1 /* SPDX-License-Identifier: GPL-2.0 */
  2 /*                                                  2 /*
  3  * Copyright(c) 2016-20 Intel Corporation.          3  * Copyright(c) 2016-20 Intel Corporation.
  4  */                                                 4  */
  5                                                     5 
  6         .macro ENCLU                                6         .macro ENCLU
  7         .byte 0x0f, 0x01, 0xd7                      7         .byte 0x0f, 0x01, 0xd7
  8         .endm                                       8         .endm
  9                                                     9 
 10         .section ".tcs", "aw"                      10         .section ".tcs", "aw"
 11         .balign 4096                               11         .balign 4096
 12                                                    12 
 13         .fill   1, 8, 0                 # STAT     13         .fill   1, 8, 0                 # STATE (set by CPU)
 14         .fill   1, 8, 0                 # FLAG     14         .fill   1, 8, 0                 # FLAGS
 15         .quad   encl_ssa_tcs1           # OSSA     15         .quad   encl_ssa_tcs1           # OSSA
 16         .fill   1, 4, 0                 # CSSA     16         .fill   1, 4, 0                 # CSSA (set by CPU)
 17         .fill   1, 4, 1                 # NSSA     17         .fill   1, 4, 1                 # NSSA
 18         .quad   encl_entry              # OENT     18         .quad   encl_entry              # OENTRY
 19         .fill   1, 8, 0                 # AEP      19         .fill   1, 8, 0                 # AEP (set by EENTER and ERESUME)
 20         .fill   1, 8, 0                 # OFSB     20         .fill   1, 8, 0                 # OFSBASE
 21         .fill   1, 8, 0                 # OGSB     21         .fill   1, 8, 0                 # OGSBASE
 22         .fill   1, 4, 0xFFFFFFFF        # FSLI     22         .fill   1, 4, 0xFFFFFFFF        # FSLIMIT
 23         .fill   1, 4, 0xFFFFFFFF        # GSLI     23         .fill   1, 4, 0xFFFFFFFF        # GSLIMIT
 24         .fill   4024, 1, 0              # Rese     24         .fill   4024, 1, 0              # Reserved
 25                                                    25 
 26         # TCS2                                     26         # TCS2
 27         .fill   1, 8, 0                 # STAT     27         .fill   1, 8, 0                 # STATE (set by CPU)
 28         .fill   1, 8, 0                 # FLAG     28         .fill   1, 8, 0                 # FLAGS
 29         .quad   encl_ssa_tcs2           # OSSA     29         .quad   encl_ssa_tcs2           # OSSA
 30         .fill   1, 4, 0                 # CSSA     30         .fill   1, 4, 0                 # CSSA (set by CPU)
 31         .fill   1, 4, 1                 # NSSA     31         .fill   1, 4, 1                 # NSSA
 32         .quad   encl_entry              # OENT     32         .quad   encl_entry              # OENTRY
 33         .fill   1, 8, 0                 # AEP      33         .fill   1, 8, 0                 # AEP (set by EENTER and ERESUME)
 34         .fill   1, 8, 0                 # OFSB     34         .fill   1, 8, 0                 # OFSBASE
 35         .fill   1, 8, 0                 # OGSB     35         .fill   1, 8, 0                 # OGSBASE
 36         .fill   1, 4, 0xFFFFFFFF        # FSLI     36         .fill   1, 4, 0xFFFFFFFF        # FSLIMIT
 37         .fill   1, 4, 0xFFFFFFFF        # GSLI     37         .fill   1, 4, 0xFFFFFFFF        # GSLIMIT
 38         .fill   4024, 1, 0              # Rese     38         .fill   4024, 1, 0              # Reserved
 39                                                    39 
 40         .text                                      40         .text
 41                                                    41 
 42 encl_entry:                                        42 encl_entry:
 43         # RBX contains the base address for TC     43         # RBX contains the base address for TCS, which is the first address
 44         # inside the enclave for TCS #1 and on     44         # inside the enclave for TCS #1 and one page into the enclave for
 45         # TCS #2. First make it relative by su     45         # TCS #2. First make it relative by substracting __encl_base and
 46         # then add the address of encl_stack t     46         # then add the address of encl_stack to get the address for the stack.
 47         lea __encl_base(%rip), %rax                47         lea __encl_base(%rip), %rax
 48         sub %rax, %rbx                             48         sub %rax, %rbx
 49         lea encl_stack(%rip), %rax                 49         lea encl_stack(%rip), %rax
 50         add %rbx, %rax                             50         add %rbx, %rax
 51         jmp encl_entry_core                        51         jmp encl_entry_core
 52 encl_dyn_entry:                                    52 encl_dyn_entry:
 53         # Entry point for dynamically created      53         # Entry point for dynamically created TCS page expected to follow
 54         # its stack directly.                      54         # its stack directly.
 55         lea -1(%rbx), %rax                         55         lea -1(%rbx), %rax
 56 encl_entry_core:                                   56 encl_entry_core:
 57         xchg    %rsp, %rax                         57         xchg    %rsp, %rax
 58         push    %rax                               58         push    %rax
 59                                                    59 
 60         push    %rcx # push the address after      60         push    %rcx # push the address after EENTER
 61                                                    61 
 62         # NOTE: as the selftest enclave is *no     62         # NOTE: as the selftest enclave is *not* intended for production,
 63         # simplify the code by not initializin     63         # simplify the code by not initializing ABI registers on entry or
 64         # cleansing caller-save registers on e     64         # cleansing caller-save registers on exit.
 65         call    encl_body                          65         call    encl_body
 66                                                    66 
 67         # Prepare EEXIT target by popping the      67         # Prepare EEXIT target by popping the address of the instruction after
 68         # EENTER to RBX.                           68         # EENTER to RBX.
 69         pop     %rbx                               69         pop     %rbx
 70                                                    70 
 71         # Restore the caller stack.                71         # Restore the caller stack.
 72         pop     %rax                               72         pop     %rax
 73         mov     %rax, %rsp                         73         mov     %rax, %rsp
 74                                                    74 
 75         # EEXIT                                    75         # EEXIT
 76         mov     $4, %rax                           76         mov     $4, %rax
 77         enclu                                      77         enclu
 78                                                    78 
 79         .section ".data", "aw"                     79         .section ".data", "aw"
 80                                                    80 
 81 encl_ssa_tcs1:                                     81 encl_ssa_tcs1:
 82         .space 4096                                82         .space 4096
 83 encl_ssa_tcs2:                                     83 encl_ssa_tcs2:
 84         .space 4096                                84         .space 4096
 85                                                    85 
 86         .balign 4096                               86         .balign 4096
 87         # Stack of TCS #1                          87         # Stack of TCS #1
 88         .space 4096                                88         .space 4096
 89 encl_stack:                                        89 encl_stack:
 90         .balign 4096                               90         .balign 4096
 91         # Stack of TCS #2                          91         # Stack of TCS #2
 92         .space 4096                                92         .space 4096
                                                      

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