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32 lines
1.2 KiB
32 lines
1.2 KiB
9 months ago
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commit 88361b408b9dbd313f15413cc2e6be0f1cafb01a
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Author: H.J. Lu <hjl.tools@gmail.com>
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Date: Tue Aug 17 19:36:04 2021 -0700
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elf: Copy l_addr/l_ld when adding ld.so to a new namespace
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When add ld.so to a new namespace, we don't actually load ld.so. We
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create a new link map and refers the real one for almost everything.
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Copy l_addr and l_ld from the real ld.so link map to avoid GDB warning:
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warning: .dynamic section for ".../elf/ld-linux-x86-64.so.2" is not at the expected address (wrong library or version mismatch?)
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when handling shared library loaded by dlmopen.
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Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
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diff --git a/elf/dl-load.c b/elf/dl-load.c
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index cdb5d4b5b67f1ca1..303e6594f9af9b7e 100644
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--- a/elf/dl-load.c
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+++ b/elf/dl-load.c
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@@ -932,6 +932,10 @@ _dl_map_object_from_fd (const char *name, const char *origname, int fd,
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/* Refer to the real descriptor. */
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l->l_real = &GL(dl_rtld_map);
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+ /* Copy l_addr and l_ld to avoid a GDB warning with dlmopen(). */
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+ l->l_addr = l->l_real->l_addr;
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+ l->l_ld = l->l_real->l_ld;
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+
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/* No need to bump the refcount of the real object, ld.so will
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never be unloaded. */
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__close_nocancel (fd);
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