Differential D10385 Diff 38027 head/sys/kern/link_elf.c

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head/sys/kern/link_elf.c

Show First 20 Lines • Show All 761 Lines • ▼ Show 20 Lines	link_elf_load_file(linker_class_t cls, const char* filename,
Elf_Ehdr *hdr;		Elf_Ehdr *hdr;
caddr_t firstpage;		caddr_t firstpage;
int nbytes, i;		int nbytes, i;
Elf_Phdr *phdr;		Elf_Phdr *phdr;
Elf_Phdr *phlimit;		Elf_Phdr *phlimit;
Elf_Phdr *segs[MAXSEGS];		Elf_Phdr *segs[MAXSEGS];
int nsegs;		int nsegs;
Elf_Phdr *phdyn;		Elf_Phdr *phdyn;
Elf_Phdr *phphdr;
caddr_t mapbase;		caddr_t mapbase;
size_t mapsize;		size_t mapsize;
Elf_Off base_offset;
Elf_Addr base_vaddr;		Elf_Addr base_vaddr;
Elf_Addr base_vlimit;		Elf_Addr base_vlimit;
int error = 0;		int error = 0;
ssize_t resid;		ssize_t resid;
int flags;		int flags;
elf_file_t ef;		elf_file_t ef;
linker_file_t lf;		linker_file_t lf;
Elf_Shdr *shdr;		Elf_Shdr *shdr;
▲ Show 20 Lines • Show All 82 Lines • ▼ Show 20 Lines	#endif
*		*
* We rely on there being exactly two load segments, text and data,		* We rely on there being exactly two load segments, text and data,
* in that order.		* in that order.
*/		*/
phdr = (Elf_Phdr *) (firstpage + hdr->e_phoff);		phdr = (Elf_Phdr *) (firstpage + hdr->e_phoff);
phlimit = phdr + hdr->e_phnum;		phlimit = phdr + hdr->e_phnum;
nsegs = 0;		nsegs = 0;
phdyn = NULL;		phdyn = NULL;
phphdr = NULL;
while (phdr < phlimit) {		while (phdr < phlimit) {
switch (phdr->p_type) {		switch (phdr->p_type) {
case PT_LOAD:		case PT_LOAD:
if (nsegs == MAXSEGS) {		if (nsegs == MAXSEGS) {
link_elf_error(filename, "Too many sections");		link_elf_error(filename, "Too many sections");
error = ENOEXEC;		error = ENOEXEC;
goto out;		goto out;
}		}
/*		/*
* XXX: We just trust they come in right order ??		* XXX: We just trust they come in right order ??
*/		*/
segs[nsegs] = phdr;		segs[nsegs] = phdr;
++nsegs;		++nsegs;
break;		break;

case PT_PHDR:
phphdr = phdr;
break;

case PT_DYNAMIC:		case PT_DYNAMIC:
phdyn = phdr;		phdyn = phdr;
break;		break;

case PT_INTERP:		case PT_INTERP:
error = ENOSYS;		error = ENOSYS;
goto out;		goto out;
}		}
Show All 11 Lines	if (nsegs == 0) {
goto out;		goto out;
}		}

/*		/*
* Allocate the entire address space of the object, to stake		* Allocate the entire address space of the object, to stake
* out our contiguous region, and to establish the base		* out our contiguous region, and to establish the base
* address for relocation.		* address for relocation.
*/		*/
base_offset = trunc_page(segs[0]->p_offset);
base_vaddr = trunc_page(segs[0]->p_vaddr);		base_vaddr = trunc_page(segs[0]->p_vaddr);
base_vlimit = round_page(segs[nsegs - 1]->p_vaddr +		base_vlimit = round_page(segs[nsegs - 1]->p_vaddr +
segs[nsegs - 1]->p_memsz);		segs[nsegs - 1]->p_memsz);
mapsize = base_vlimit - base_vaddr;		mapsize = base_vlimit - base_vaddr;

lf = linker_make_file(filename, &link_elf_class);		lf = linker_make_file(filename, &link_elf_class);
if (lf == NULL) {		if (lf == NULL) {
error = ENOMEM;		error = ENOMEM;
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