Page MenuHomeFreeBSD
Files F142740784

D7255.diff
No OneTemporary
Actions

D7255.diff
View Options

Index: head/sys/kern/imgact_elf.c
===================================================================
--- head/sys/kern/imgact_elf.c
+++ head/sys/kern/imgact_elf.c
@@ -1323,6 +1323,8 @@
* Collect info about the core file header area.
*/
hdrsize = sizeof(Elf_Ehdr) + sizeof(Elf_Phdr) * (1 + seginfo.count);
+ if (seginfo.count + 1 >= PN_XNUM)
+ hdrsize += sizeof(Elf_Shdr);
__elfN(prepare_notes)(td, &notelst, &notesz);
coresize = round_page(hdrsize + notesz) + seginfo.size;
@@ -1618,10 +1620,10 @@
{
Elf_Ehdr *ehdr;
Elf_Phdr *phdr;
+ Elf_Shdr *shdr;
struct phdr_closure phc;
ehdr = (Elf_Ehdr *)hdr;
- phdr = (Elf_Phdr *)((char *)hdr + sizeof(Elf_Ehdr));
ehdr->e_ident[EI_MAG0] = ELFMAG0;
ehdr->e_ident[EI_MAG1] = ELFMAG1;
@@ -1645,14 +1647,43 @@
ehdr->e_flags = 0;
ehdr->e_ehsize = sizeof(Elf_Ehdr);
ehdr->e_phentsize = sizeof(Elf_Phdr);
- ehdr->e_phnum = numsegs + 1;
ehdr->e_shentsize = sizeof(Elf_Shdr);
- ehdr->e_shnum = 0;
ehdr->e_shstrndx = SHN_UNDEF;
+ if (numsegs + 1 < PN_XNUM) {
+ ehdr->e_phnum = numsegs + 1;
+ ehdr->e_shnum = 0;
+ } else {
+ ehdr->e_phnum = PN_XNUM;
+ ehdr->e_shnum = 1;
+
+ ehdr->e_shoff = ehdr->e_phoff +
+ (numsegs + 1) * ehdr->e_phentsize;
+ KASSERT(ehdr->e_shoff == hdrsize - sizeof(Elf_Shdr),
+ ("e_shoff: %zu, hdrsize - shdr: %zu",
+ ehdr->e_shoff, hdrsize - sizeof(Elf_Shdr)));
+
+ shdr = (Elf_Shdr *)((char *)hdr + ehdr->e_shoff);
+ memset(shdr, 0, sizeof(*shdr));
+ /*
+ * A special first section is used to hold large segment and
+ * section counts. This was proposed by Sun Microsystems in
+ * Solaris and has been adopted by Linux; the standard ELF
+ * tools are already familiar with the technique.
+ *
+ * See table 7-7 of the Solaris "Linker and Libraries Guide"
+ * (or 12-7 depending on the version of the document) for more
+ * details.
+ */
+ shdr->sh_type = SHT_NULL;
+ shdr->sh_size = ehdr->e_shnum;
+ shdr->sh_link = ehdr->e_shstrndx;
+ shdr->sh_info = numsegs + 1;
+ }
/*
* Fill in the program header entries.
*/
+ phdr = (Elf_Phdr *)((char *)hdr + ehdr->e_phoff);
/* The note segement. */
phdr->p_type = PT_NOTE;

File Metadata

Mime Type
text/plain
Expires
Fri, Jan 23, 11:15 PM (11 h, 23 m)
Storage Engine
blob
Storage Format
Raw Data
Storage Handle
27891269
Default Alt Text
D7255.diff (2 KB)

Event Timeline