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| author | H.J. Lu <hjl.tools@gmail.com> | 2018-07-25 04:39:26 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2018-07-25 04:39:39 -0700 |
| commit | 9aa3113a42d94d7bbf9bb4d50ef0d23b95e66123 (patch) | |
| tree | fa63d539e751cddd5df0acde94a2ecc808642a0f /sysdeps/x86_64/nptl/tcb-offsets.sym | |
| parent | 9c79cec8cd2a6996a73aa83d79b360ffd4bebde6 (diff) | |
| download | glibc-9aa3113a42d94d7bbf9bb4d50ef0d23b95e66123.tar.gz glibc-9aa3113a42d94d7bbf9bb4d50ef0d23b95e66123.tar.xz glibc-9aa3113a42d94d7bbf9bb4d50ef0d23b95e66123.zip | |
x86: Rename __glibc_reserved2 to ssp_base in tcbhead_t
This will be used to record the current shadow stack base for shadow stack switching by getcontext, makecontext, setcontext and swapcontext. If the target shadow stack base is the same as the current shadow stack base, we unwind the shadow stack. Otherwise it is a stack switch and we look for a restore token to restore the target shadow stack. * sysdeps/i386/nptl/tcb-offsets.sym (SSP_BASE_OFFSET): New. * sysdeps/i386/nptl/tls.h (tcbhead_t): Replace __glibc_reserved2 with ssp_base. * sysdeps/x86_64/nptl/tcb-offsets.sym (SSP_BASE_OFFSET): New. * sysdeps/x86_64/nptl/tls.h (tcbhead_t): Replace __glibc_reserved2 with ssp_base.
Diffstat (limited to 'sysdeps/x86_64/nptl/tcb-offsets.sym')
| -rw-r--r-- | sysdeps/x86_64/nptl/tcb-offsets.sym | 1 |
1 files changed, 1 insertions, 0 deletions
diff --git a/sysdeps/x86_64/nptl/tcb-offsets.sym b/sysdeps/x86_64/nptl/tcb-offsets.sym index 387621e88c..ae8034743b 100644 --- a/sysdeps/x86_64/nptl/tcb-offsets.sym +++ b/sysdeps/x86_64/nptl/tcb-offsets.sym @@ -13,6 +13,7 @@ MULTIPLE_THREADS_OFFSET offsetof (tcbhead_t, multiple_threads) POINTER_GUARD offsetof (tcbhead_t, pointer_guard) VGETCPU_CACHE_OFFSET offsetof (tcbhead_t, vgetcpu_cache) FEATURE_1_OFFSET offsetof (tcbhead_t, feature_1) +SSP_BASE_OFFSET offsetof (tcbhead_t, ssp_base) -- Not strictly offsets, but these values are also used in the TCB. TCB_CANCELSTATE_BITMASK CANCELSTATE_BITMASK |