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49 lines
1.7 KiB
49 lines
1.7 KiB
commit 8d1927d8dc5aad0f01c929123086be3a5b799d18 |
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Author: Florian Weimer <fweimer@redhat.com> |
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Date: Thu Dec 9 09:49:32 2021 +0100 |
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nptl: Introduce THREAD_GETMEM_VOLATILE |
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This will be needed for rseq TCB access. |
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Reviewed-by: Szabolcs Nagy <szabolcs.nagy@arm.com> |
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diff --git a/sysdeps/i386/nptl/tcb-access.h b/sysdeps/i386/nptl/tcb-access.h |
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index 6c6d561e394817c7..5ddd83224bc8eb77 100644 |
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--- a/sysdeps/i386/nptl/tcb-access.h |
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+++ b/sysdeps/i386/nptl/tcb-access.h |
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@@ -41,6 +41,8 @@ |
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} \ |
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__value; }) |
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+/* THREAD_GETMEM already forces a read. */ |
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+#define THREAD_GETMEM_VOLATILE(descr, member) THREAD_GETMEM (descr, member) |
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/* Same as THREAD_GETMEM, but the member offset can be non-constant. */ |
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#define THREAD_GETMEM_NC(descr, member, idx) \ |
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diff --git a/sysdeps/nptl/tcb-access.h b/sysdeps/nptl/tcb-access.h |
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index b4137b8ab8067915..bbe20b7225b060fd 100644 |
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--- a/sysdeps/nptl/tcb-access.h |
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+++ b/sysdeps/nptl/tcb-access.h |
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@@ -22,6 +22,8 @@ |
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#define THREAD_GETMEM(descr, member) \ |
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descr->member |
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+#define THREAD_GETMEM_VOLATILE(descr, member) \ |
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+ (*(volatile __typeof (descr->member) *)&descr->member) |
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#define THREAD_GETMEM_NC(descr, member, idx) \ |
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descr->member[idx] |
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#define THREAD_SETMEM(descr, member, value) \ |
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diff --git a/sysdeps/x86_64/nptl/tcb-access.h b/sysdeps/x86_64/nptl/tcb-access.h |
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index 18848a729d16a4f5..e4d2d07a9b218025 100644 |
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--- a/sysdeps/x86_64/nptl/tcb-access.h |
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+++ b/sysdeps/x86_64/nptl/tcb-access.h |
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@@ -39,6 +39,8 @@ |
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} \ |
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__value; }) |
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+/* THREAD_GETMEM already forces a read. */ |
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+#define THREAD_GETMEM_VOLATILE(descr, member) THREAD_GETMEM (descr, member) |
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/* Same as THREAD_GETMEM, but the member offset can be non-constant. */ |
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# define THREAD_GETMEM_NC(descr, member, idx) \
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