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83 lines
2.5 KiB
83 lines
2.5 KiB
2 days ago
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Extra changes needed for backport:
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* rename field "rtld_catch" to "rtld_catch_f" to avoid conflict
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between "struct rtld-catch" and rtld_catch macro
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* move rtld_catch into one of the unused padding fields to preserve
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ABI
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* Validate that the padding fields used don't overlap other fields.
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diff -rup a/elf/dl-catch.c b/elf/dl-catch.c
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--- a/elf/dl-catch.c 2024-09-04 16:30:02.086402568 -0400
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+++ b/elf/dl-catch.c 2024-09-04 16:55:01.933440181 -0400
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@@ -59,7 +59,7 @@ get_catch (void)
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return rtld_catch_notls;
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else
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#endif
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- return THREAD_GETMEM (THREAD_SELF, rtld_catch);
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+ return THREAD_GETMEM (THREAD_SELF, rtld_catch_f);
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}
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static void
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@@ -70,7 +70,7 @@ set_catch (struct rtld_catch *catch)
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rtld_catch_notls = catch;
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else
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#endif
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- THREAD_SETMEM (THREAD_SELF, rtld_catch, catch);
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+ THREAD_SETMEM (THREAD_SELF, rtld_catch_f, catch);
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}
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/* Lossage while resolving the program's own symbols is always fatal. */
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diff -rup a/nptl/descr.h b/nptl/descr.h
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--- a/nptl/descr.h 2024-08-29 11:29:16.801811033 -0400
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+++ b/nptl/descr.h 2024-08-29 11:48:56.547644398 -0400
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@@ -164,6 +164,12 @@ struct pthread
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void *__padding[24];
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};
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+#ifdef __x86_64__
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+#define rtld_catch_f header.__padding[7]
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+#else
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+#define rtld_catch_f __padding[23]
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+#endif
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+
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/* This descriptor's link on the GL (dl_stack_used) or
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GL (dl_stack_user) list. */
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list_t list;
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@@ -396,9 +402,6 @@ struct pthread
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masked.) */
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sigset_t sigmask;
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- /* Used by the exception handling implementation in the dynamic loader. */
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- struct rtld_catch *rtld_catch;
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-
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/* Indicates whether is a C11 thread created by thrd_creat. */
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bool c11;
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@@ -432,6 +435,12 @@ struct pthread
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+ sizeof ((struct pthread) {}.rseq_area))
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} __attribute ((aligned (TCB_ALIGNMENT)));
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+#ifdef __x86_64__
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+_Static_assert (sizeof ((*(struct pthread *)0).header) > sizeof ((*(struct pthread *)0).__padding), "rtld_catch");
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+#else
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+_Static_assert (sizeof ((*(struct pthread *)0).header) < sizeof ((*(struct pthread *)0).__padding), "rtld_catch");
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+#endif
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+
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static inline bool
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cancel_enabled_and_canceled (int value)
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{
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diff -rup a/sysdeps/mach/hurd/i386/tls.h b/sysdeps/mach/hurd/i386/tls.h
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--- a/sysdeps/mach/hurd/i386/tls.h 2024-08-29 11:29:16.810811382 -0400
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+++ b/sysdeps/mach/hurd/i386/tls.h 2024-08-29 11:35:45.262899113 -0400
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@@ -50,7 +50,7 @@ typedef struct
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struct hurd_sigstate *_hurd_sigstate;
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/* Used by the exception handling implementation in the dynamic loader. */
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- struct rtld_catch *rtld_catch;
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+ struct rtld_catch *rtld_catch_f;
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} tcbhead_t;
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#endif
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