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diff --git a/sys/kern/kern_linker.c b/sys/kern/kern_linker.c
--- a/sys/kern/kern_linker.c
+++ b/sys/kern/kern_linker.c
@@ -79,6 +79,8 @@
const int kld_off_filename = offsetof(struct linker_file, filename);
const int kld_off_pathname = offsetof(struct linker_file, pathname);
const int kld_off_next = offsetof(struct linker_file, link.tqe_next);
+const int kld_off_uuid_addr = offsetof(struct linker_file, uuid_addr);
+const int kld_off_uuid_size = offsetof(struct linker_file, uuid_size);
/*
* static char *linker_search_path(const char *name, struct mod_depend
@@ -669,6 +671,8 @@
lf->ndeps = 0;
lf->deps = NULL;
lf->loadcnt = ++loadcnt;
+ lf->uuid_addr = NULL;
+ lf->uuid_size = 0;
#ifdef __arm__
lf->exidx_addr = 0;
lf->exidx_size = 0;
diff --git a/sys/kern/link_elf.c b/sys/kern/link_elf.c
--- a/sys/kern/link_elf.c
+++ b/sys/kern/link_elf.c
@@ -448,8 +448,8 @@
link_elf_init(void* arg)
{
Elf_Dyn *dp;
- Elf_Addr *ctors_addrp;
- Elf_Size *ctors_sizep;
+ Elf_Addr *ctors_addrp, *uuid_addrp;
+ Elf_Size *ctors_sizep, *uuid_sizep;
caddr_t modptr, baseptr, sizeptr;
elf_file_t ef;
const char *modname;
@@ -510,6 +510,15 @@
*ctors_addrp;
linker_kernel_file->ctors_size = *ctors_sizep;
}
+ uuid_addrp = (Elf_Addr *)preload_search_info(modptr,
+ MODINFO_METADATA | MODINFOMD_UUID_ADDR);
+ uuid_sizep = (Elf_Size *)preload_search_info(modptr,
+ MODINFO_METADATA | MODINFOMD_UUID_SIZE);
+ if (uuid_addrp != NULL && uuid_sizep != NULL) {
+ linker_kernel_file->uuid_addr = ef->address +
+ *uuid_addrp;
+ linker_kernel_file->uuid_size = *uuid_sizep;
+ }
}
(void)link_elf_preload_parse_symbols(ef);
@@ -880,8 +889,8 @@
link_elf_link_preload(linker_class_t cls, const char *filename,
linker_file_t *result)
{
- Elf_Addr *ctors_addrp;
- Elf_Size *ctors_sizep;
+ Elf_Addr *ctors_addrp, *uuid_addrp;
+ Elf_Size *ctors_sizep, *uuid_sizep;
caddr_t modptr, baseptr, sizeptr, dynptr;
char *type;
elf_file_t ef;
@@ -931,6 +940,15 @@
lf->ctors_size = *ctors_sizep;
}
+ uuid_addrp = (Elf_Addr *)preload_search_info(modptr,
+ MODINFO_METADATA | MODINFOMD_UUID_ADDR);
+ uuid_sizep = (Elf_Size *)preload_search_info(modptr,
+ MODINFO_METADATA | MODINFOMD_UUID_SIZE);
+ if (uuid_addrp != NULL && uuid_sizep != NULL) {
+ lf->uuid_addr = ef->address + *uuid_addrp;
+ lf->uuid_size = *uuid_sizep;
+ }
+
#ifdef __arm__
link_elf_locate_exidx_preload(lf, modptr);
#endif
@@ -1296,6 +1314,12 @@
/* Record relocated address and size of .ctors. */
lf->ctors_addr = mapbase + shdr[i].sh_addr - base_vaddr;
lf->ctors_size = shdr[i].sh_size;
+ } else if (shdr[i].sh_type == SHT_NOTE &&
+ strcmp(shstrs + shdr[i].sh_name, ".note.gnu.build-id") ==
+ 0) {
+ /* Record relocated address and size of uuid */
+ lf->uuid_addr = mapbase + shdr[i].sh_addr - base_vaddr;
+ lf->uuid_size = shdr[i].sh_size;
}
}
if (symtabindex < 0 || symstrindex < 0)
diff --git a/sys/kern/link_elf_obj.c b/sys/kern/link_elf_obj.c
--- a/sys/kern/link_elf_obj.c
+++ b/sys/kern/link_elf_obj.c
@@ -603,6 +603,13 @@
ef->relatab[ra].sec = shdr[i].sh_info;
ra++;
break;
+ case SHT_NOTE:
+ if (strcmp(ef->shstrtab + shdr[i].sh_name,
+ ".note.gnu.build-id"))
+ break;
+ lf->uuid_addr = (caddr_t)shdr[i].sh_addr;
+ lf->uuid_size = shdr[i].sh_size;
+ break;
}
}
if (pb != ef->nprogtab) {
@@ -1206,6 +1213,23 @@
}
ra++;
break;
+ case SHT_NOTE:
+ if (strcmp(ef->shstrtab + shdr[i].sh_name,
+ ".note.gnu.build-id"))
+ break;
+ lf->uuid_addr = malloc(shdr[i].sh_size, M_LINKER,
+ M_WAITOK);
+ lf->uuid_size = shdr[i].sh_size;
+ error = vn_rdwr(UIO_READ, nd->ni_vp, lf->uuid_addr,
+ shdr[i].sh_size, shdr[i].sh_offset, UIO_SYSSPACE,
+ IO_NODELOCKED, td->td_ucred, NOCRED, &resid, td);
+ if (error)
+ goto out;
+ if (resid != 0) {
+ error = EINVAL;
+ goto out;
+ }
+ break;
}
}
if (pb != ef->nprogtab) {
diff --git a/sys/kern/subr_module.c b/sys/kern/subr_module.c
--- a/sys/kern/subr_module.c
+++ b/sys/kern/subr_module.c
@@ -378,6 +378,12 @@
case MODINFOMD_CTORS_SIZE:
sbuf_cat(sbp, "MODINFOMD_CTORS_SIZE");
break;
+ case MODINFOMD_UUID_ADDR:
+ sbuf_cat(sbp, "MODINFOMD_UUID_ADDR");
+ break;
+ case MODINFOMD_UUID_SIZE:
+ sbuf_cat(sbp, "MODINFOMD_UUID_SIZE");
+ break;
case MODINFOMD_FW_HANDLE:
sbuf_cat(sbp, "MODINFOMD_FW_HANDLE");
break;
@@ -449,6 +455,7 @@
break;
case MODINFO_SIZE:
case MODINFO_METADATA | MODINFOMD_CTORS_SIZE:
+ case MODINFO_METADATA | MODINFOMD_UUID_SIZE:
sbuf_printf(sbp, "%lu", *(u_long *)bptr);
break;
case MODINFO_ADDR:
@@ -458,6 +465,7 @@
case MODINFO_METADATA | MODINFOMD_KERNEND:
case MODINFO_METADATA | MODINFOMD_ENVP:
case MODINFO_METADATA | MODINFOMD_CTORS_ADDR:
+ case MODINFO_METADATA | MODINFOMD_UUID_ADDR:
#ifdef MODINFOMD_SMAP
case MODINFO_METADATA | MODINFOMD_SMAP:
#endif
diff --git a/sys/sys/linker.h b/sys/sys/linker.h
--- a/sys/sys/linker.h
+++ b/sys/sys/linker.h
@@ -82,6 +82,8 @@
size_t size; /* size of file */
caddr_t ctors_addr; /* address of .ctors/.init_array */
size_t ctors_size; /* size of .ctors/.init_array */
+ caddr_t uuid_addr;
+ size_t uuid_size;
enum {
LF_NONE = 0,
LF_CTORS,
@@ -242,6 +244,8 @@
#define MODINFOMD_FW_HANDLE 0x000c /* Firmware dependent handle */
#define MODINFOMD_KEYBUF 0x000d /* Crypto key intake buffer */
#define MODINFOMD_FONT 0x000e /* Console font */
+#define MODINFOMD_UUID_ADDR 0x000f /* address of uuid */
+#define MODINFOMD_UUID_SIZE 0x0010 /* size of uuid */
#define MODINFOMD_NOCOPY 0x8000 /* don't copy this metadata to the kernel */
#define MODINFOMD_DEPLIST (0x4001 | MODINFOMD_NOCOPY) /* depends on */

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