svn commit: r296419 - head/sys/kern

[Konstantin Belousov]

Author: kib
Date: Sun Mar  6 00:31:11 2016
New Revision: 296419
URL: https://svnweb.freebsd.org/changeset/base/296419

Log:
  In the link_elf_obj.c, handle sections of type SHT_AMD64_UNWIND same
  as SHT_PROGBITS.  This is needed after the clang 3.8 import, which
  generates that type for .eh_frame section, which had SHT_PROGBITS type
  before.
  
  Reported by:	 Nikolai Lifanov <lifanov at mail.lifanov.com>
  PR:	207729
  Tested by:	dim (previous version)
  Sponsored by:	The FreeBSD Foundation
  MFC after:	2 weeks

Modified:
  head/sys/kern/link_elf_obj.c

Modified: head/sys/kern/link_elf_obj.c
==============================================================================
--- head/sys/kern/link_elf_obj.c	Sat Mar  5 21:10:34 2016	(r296418)
+++ head/sys/kern/link_elf_obj.c	Sun Mar  6 00:31:11 2016	(r296419)
@@ -257,6 +257,9 @@ link_elf_link_preload(linker_class_t cls
 		switch (shdr[i].sh_type) {
 		case SHT_PROGBITS:
 		case SHT_NOBITS:
+#ifdef __amd64__
+		case SHT_AMD64_UNWIND:
+#endif
 			ef->nprogtab++;
 			break;
 		case SHT_SYMTAB:
@@ -327,9 +330,16 @@ link_elf_link_preload(linker_class_t cls
 		switch (shdr[i].sh_type) {
 		case SHT_PROGBITS:
 		case SHT_NOBITS:
+#ifdef __amd64__
+		case SHT_AMD64_UNWIND:
+#endif
 			ef->progtab[pb].addr = (void *)shdr[i].sh_addr;
 			if (shdr[i].sh_type == SHT_PROGBITS)
 				ef->progtab[pb].name = "<<PROGBITS>>";
+#ifdef __amd64__
+			else if (shdr[i].sh_type == SHT_AMD64_UNWIND)
+				ef->progtab[pb].name = "<<UNWIND>>";
+#endif
 			else
 				ef->progtab[pb].name = "<<NOBITS>>";
 			ef->progtab[pb].size = shdr[i].sh_size;
@@ -575,6 +585,9 @@ link_elf_load_file(linker_class_t cls, c
 		switch (shdr[i].sh_type) {
 		case SHT_PROGBITS:
 		case SHT_NOBITS:
+#ifdef __amd64__
+		case SHT_AMD64_UNWIND:
+#endif
 			ef->nprogtab++;
 			break;
 		case SHT_SYMTAB:
@@ -681,6 +694,9 @@ link_elf_load_file(linker_class_t cls, c
 		switch (shdr[i].sh_type) {
 		case SHT_PROGBITS:
 		case SHT_NOBITS:
+#ifdef __amd64__
+		case SHT_AMD64_UNWIND:
+#endif
 			alignmask = shdr[i].sh_addralign - 1;
 			mapsize += alignmask;
 			mapsize &= ~alignmask;
@@ -748,6 +764,9 @@ link_elf_load_file(linker_class_t cls, c
 		switch (shdr[i].sh_type) {
 		case SHT_PROGBITS:
 		case SHT_NOBITS:
+#ifdef __amd64__
+		case SHT_AMD64_UNWIND:
+#endif
 			alignmask = shdr[i].sh_addralign - 1;
 			mapbase += alignmask;
 			mapbase &= ~alignmask;
@@ -760,6 +779,10 @@ link_elf_load_file(linker_class_t cls, c
 				}
 			} else if (shdr[i].sh_type == SHT_PROGBITS)
 				ef->progtab[pb].name = "<<PROGBITS>>";
+#ifdef __amd64__
+			else if (shdr[i].sh_type == SHT_AMD64_UNWIND)
+				ef->progtab[pb].name = "<<UNWIND>>";
+#endif
 			else
 				ef->progtab[pb].name = "<<NOBITS>>";
 			if (ef->progtab[pb].name != NULL && 
@@ -781,7 +804,11 @@ link_elf_load_file(linker_class_t cls, c
 			}
 			ef->progtab[pb].size = shdr[i].sh_size;
 			ef->progtab[pb].sec = i;
-			if (shdr[i].sh_type == SHT_PROGBITS) {
+			if (shdr[i].sh_type == SHT_PROGBITS
+#ifdef __amd64__
+			    || shdr[i].sh_type == SHT_AMD64_UNWIND
+#endif
+			    ) {
 				error = vn_rdwr(UIO_READ, nd.ni_vp,
 				    ef->progtab[pb].addr,
 				    shdr[i].sh_size, shdr[i].sh_offset,