rtld: Compute obj->maxsize for obj_rtld

Compute this while parsing the program headers in parse_rtld_phdr().

Reviewed by:	kib
Obtained from:	CheriBSD
Sponsored by:	AFRL, DARPA
Differential Revision:	https://reviews.freebsd.org/D52033

This commit is contained in:

John Baldwin

2025-08-22 09:59:09 -04:00

parent 0cd42981dc

commit e679319b84

1 changed files with 10 additions and 0 deletions

									
										libexec/rtld-elf/rtld.c
									
		+10
		
												View File
												
				@@ -2437,11 +2437,21 @@ parse_rtld_phdr(Obj_Entry *obj)

				{

					const Elf_Phdr *ph;

					Elf_Addr note_start, note_end;

					bool first_seg;

					first_seg = true;

					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_LOAD:

							if (first_seg) {

								obj->vaddrbase = rtld_trunc_page(ph->p_vaddr);

								first_seg = false;

							}

							obj->mapsize = rtld_round_page(ph->p_vaddr +

							    ph->p_memsz) - obj->vaddrbase;

							break;

						case PT_GNU_STACK:

							obj->stack_flags = ph->p_flags;

							break;