From b413280cfb16834450f66f554bc0d618bb513851 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Thu, 16 Sep 2021 08:15:29 -0700 Subject: ld.so: Replace DL_RO_DYN_SECTION with dl_relocate_ld [BZ #28340] We can't relocate entries in dynamic section if it is readonly: 1. Add a l_ld_readonly field to struct link_map to indicate if dynamic section is readonly and set it based on p_flags of PT_DYNAMIC segment. 2. Replace DL_RO_DYN_SECTION with dl_relocate_ld to decide if dynamic section should be relocated. 3. Remove DL_RO_DYN_TEMP_CNT. 4. Don't use a static dynamic section to make readonly dynamic section in vDSO writable. 5. Remove the temp argument from elf_get_dynamic_info. This fixes BZ #28340. Reviewed-by: Siddhesh Poyarekar --- include/link.h | 3 +++ 1 file changed, 3 insertions(+) (limited to 'include') diff --git a/include/link.h b/include/link.h index 7b8250db36..484ee6cb1b 100644 --- a/include/link.h +++ b/include/link.h @@ -205,6 +205,7 @@ struct link_map unsigned int l_free_initfini:1; /* Nonzero if l_initfini can be freed, ie. not allocated with the dummy malloc in ld.so. */ + unsigned int l_ld_readonly:1; /* Nonzero if dynamic section is readonly. */ /* NODELETE status of the map. Only valid for maps of type lt_loaded. Lazy binding sets l_nodelete_active directly, @@ -342,6 +343,8 @@ struct link_map unsigned long long int l_serial; }; +#include + /* Information used by audit modules. For most link maps, this data immediate follows the link map in memory. For the dynamic linker, it is allocated separately. See link_map_audit_state in -- cgit 1.4.1