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commit 475849fdb25265706772905b856cd7028c566a71
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Author: Jan Kratochvil <jan.kratochvil@redhat.com>
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Date: Thu Jul 24 20:47:17 2014 +0200
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Fix report_r_debug for prelinked libraries
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Signed-off-by: Jan Kratochvil <jan.kratochvil@redhat.com>
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diff --git a/libdwfl/link_map.c b/libdwfl/link_map.c
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index 2913d9f..272f89b 100644
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--- a/libdwfl/link_map.c
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+++ b/libdwfl/link_map.c
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@@ -321,7 +321,11 @@ report_r_debug (uint_fast8_t elfclass, uint_fast8_t elfdata,
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if (read_addrs (next, 4))
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return release_buffer (-1);
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- GElf_Addr l_addr = addrs[0];
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+ /* Unused: l_addr is the difference between the address in memory
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+ and the ELF file when the core was created. We need to
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+ recalculate the difference below because the ELF file we use
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+ might be differently pre-linked. */
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+ // GElf_Addr l_addr = addrs[0];
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GElf_Addr l_name = addrs[1];
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GElf_Addr l_ld = addrs[2];
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next = addrs[3];
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@@ -432,11 +436,14 @@ report_r_debug (uint_fast8_t elfclass, uint_fast8_t elfdata,
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if (valid)
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{
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+ // It is like l_addr but it handles differently prelinked
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+ // files at core dumping vs. core loading time.
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+ GElf_Addr base = l_ld - elf_dynamic_vaddr;
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if (r_debug_info_module == NULL)
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{
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// XXX hook for sysroot
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mod = __libdwfl_report_elf (dwfl, basename (name),
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- name, fd, elf, l_addr,
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+ name, fd, elf, base,
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true, true);
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if (mod != NULL)
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{
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@@ -444,7 +451,7 @@ report_r_debug (uint_fast8_t elfclass, uint_fast8_t elfdata,
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fd = -1;
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}
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}
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- else if (__libdwfl_elf_address_range (elf, l_addr, true,
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+ else if (__libdwfl_elf_address_range (elf, base, true,
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true, NULL, NULL,
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&r_debug_info_module->start,
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&r_debug_info_module->end,
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