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| author | Raoul Strackx <raoul.strackx@fortanix.com> | 2020-02-07 10:49:47 +0100 |
|---|---|---|
| committer | Jethro Beekman <jethro@fortanix.com> | 2020-02-10 20:57:30 +0100 |
| commit | 236ab6e6d631f073a8c3c7439af6b2ec58ce1f25 (patch) | |
| tree | f66e18e5e348ffa31336b6a1484271f77bebc7a6 /src/libstd | |
| parent | aeedc9dea9e0460488e0b6ce7fe3aaf50395774c (diff) | |
| download | rust-236ab6e6d631f073a8c3c7439af6b2ec58ce1f25.tar.gz rust-236ab6e6d631f073a8c3c7439af6b2ec58ce1f25.zip | |
sanitize MXCSR/FPU control registers
Diffstat (limited to 'src/libstd')
| -rw-r--r-- | src/libstd/sys/sgx/abi/entry.S | 11 |
1 files changed, 11 insertions, 0 deletions
diff --git a/src/libstd/sys/sgx/abi/entry.S b/src/libstd/sys/sgx/abi/entry.S index 7c273a8a83d..a08caec3c2b 100644 --- a/src/libstd/sys/sgx/abi/entry.S +++ b/src/libstd/sys/sgx/abi/entry.S @@ -30,6 +30,14 @@ IMAGE_BASE: /* We can store a bunch of data in the gap between MXCSR and the XSAVE header */ +/* MXCSR initialization value for ABI */ +.Lmxcsr_init: + .int 0x1f80 + +/* x87 FPU control word initialization value for ABI */ +.Lfpucw_init: + .int 0x037f + /* The following symbols point at read-only data that will be filled in by the */ /* post-linker. */ @@ -173,6 +181,9 @@ sgx_entry: mov %gs:tcsls_last_rsp,%r11 test %r11,%r11 jnz .Lusercall_ret +/* reset user state */ + ldmxcsr .Lmxcsr_init(%rip) + fldcw .Lfpucw_init(%rip) /* setup stack */ mov %gs:tcsls_tos,%rsp /* initially, RSP is not set to the correct value */ /* here. This is fixed below under "adjust stack". */ |