Author: kib Date: Thu Jun 18 23:06:05 2020 New Revision: 362346 URL: https://svnweb.freebsd.org/changeset/base/362346
Log: rtld: Parse own phdr and notes. Reviewed by: emaste Sponsored by: The FreeBSD Foundation MFC after: 1 week Differential revision: https://reviews.freebsd.org/D25319 Modified: head/libexec/rtld-elf/rtld.c Modified: head/libexec/rtld-elf/rtld.c ============================================================================== --- head/libexec/rtld-elf/rtld.c Thu Jun 18 22:10:06 2020 (r362345) +++ head/libexec/rtld-elf/rtld.c Thu Jun 18 23:06:05 2020 (r362346) @@ -2182,6 +2182,34 @@ process_z(Obj_Entry *root) } } } + +static void +parse_rtld_phdr(Obj_Entry *obj) +{ + const Elf_Phdr *ph; + Elf_Addr note_start, note_end; + + obj->stack_flags = PF_X | PF_R | PF_W; + for (ph = obj->phdr; (const char *)ph < (const char *)obj->phdr + + obj->phsize; ph++) { + switch (ph->p_type) { + case PT_GNU_STACK: + obj->stack_flags = ph->p_flags; + break; + case PT_GNU_RELRO: + obj->relro_page = obj->relocbase + + trunc_page(ph->p_vaddr); + obj->relro_size = round_page(ph->p_memsz); + break; + case PT_NOTE: + note_start = (Elf_Addr)obj->relocbase + ph->p_vaddr; + note_end = note_start + ph->p_filesz; + digest_notes(obj, note_start, note_end); + break; + } + } +} + /* * Initialize the dynamic linker. The argument is the address at which * the dynamic linker has been mapped into memory. The primary task of @@ -2250,6 +2278,8 @@ init_rtld(caddr_t mapbase, Elf_Auxinfo **aux_info) /* Replace the path with a dynamically allocated copy. */ obj_rtld.path = xstrdup(ld_path_rtld); + + parse_rtld_phdr(&obj_rtld); r_debug.r_brk = r_debug_state; r_debug.r_state = RT_CONSISTENT; _______________________________________________ svn-src-head@freebsd.org mailing list https://lists.freebsd.org/mailman/listinfo/svn-src-head To unsubscribe, send any mail to "svn-src-head-unsubscr...@freebsd.org"
