#undef __XEN_VIRT_START
#define __XEN_VIRT_START __image_base__
#define DECL_SECTION(x) x :
+/*
+ * Use the NOLOAD directive, despite currently ignored by (at least) GNU ld
+ * for PE output, in order to record that we'd prefer these sections to not
+ * be loaded into memory.
+ */
+#define DECL_DEBUG(x, a) #x ALIGN(a) (NOLOAD) : { *(x) }
+#define DECL_DEBUG2(x, y, a) #x ALIGN(a) (NOLOAD) : { *(x) *(y) }
ENTRY(efi_start)
#define FORMAT "elf64-x86-64"
#define DECL_SECTION(x) #x : AT(ADDR(#x) - __XEN_VIRT_START)
+#define DECL_DEBUG(x, a) #x 0 : { *(x) }
+#define DECL_DEBUG2(x, y, a) #x 0 : { *(x) *(y) }
ENTRY(start_pa)
} PHDR(text)
#if defined(CONFIG_PVH_GUEST) && !defined(EFI)
+ /*
+ * In principle this should be fine to live in .note (below), but let's keep
+ * it separate in case anyone decided to find these notes by section name.
+ */
DECL_SECTION(.note.Xen) {
*(.note.Xen)
} PHDR(note) PHDR(text)
#endif
#endif
+#ifndef EFI
+ /* Retain these just for the purpose of possible analysis tools. */
+ DECL_SECTION(.note) {
+ *(.note.*)
+ } PHDR(note) PHDR(text)
+#endif
+
_erodata = .;
. = ALIGN(SECTION_ALIGN);
__ctors_end = .;
} PHDR(text)
+#ifndef EFI
+ /*
+ * With --orphan-sections=warn (or =error) we need to handle certain linker
+ * generated sections. These are all expected to be empty; respective
+ * ASSERT()s can be found towards the end of this file. Put them in the
+ * text program header, just to be on the safe side against e.g. a linker
+ * otherwise chosing to put them in a separate one.
+ */
+ DECL_SECTION(.got) {
+ *(.got)
+ } PHDR(text)
+ DECL_SECTION(.got.plt) {
+ *(.got.plt)
+ } PHDR(text)
+ DECL_SECTION(.igot.plt) {
+ *(.igot.plt)
+ } PHDR(text)
+ DECL_SECTION(.iplt) {
+ *(.iplt)
+ } PHDR(text)
+ DECL_SECTION(.plt) {
+ *(.plt)
+ } PHDR(text)
+ DECL_SECTION(.rela) {
+ *(.rela.*)
+ } PHDR(text)
+#endif
+
. = ALIGN(SECTION_ALIGN);
__init_end = .;
__2M_init_end = .;
*(.reloc)
__base_relocs_end = .;
}
- /*
- * Explicitly list debug section for the PE output so that they don't end
- * up at VA 0 which is below image base and thus invalid. Also use the
- * NOLOAD directive, despite currently ignored by ld for PE output, in
- * order to record that we'd prefer these sections to not be loaded into
- * memory.
- *
- * Note that we're past _end here, so if these sections get loaded they'll
- * be discarded at runtime anyway.
- */
- .debug_abbrev ALIGN(1) (NOLOAD) : {
- *(.debug_abbrev)
- }
- .debug_info ALIGN(1) (NOLOAD) : {
- *(.debug_info)
- *(.gnu.linkonce.wi.*)
- }
- .debug_types ALIGN(1) (NOLOAD) : {
- *(.debug_types)
- }
- .debug_str ALIGN(1) (NOLOAD) : {
- *(.debug_str)
- }
- .debug_line ALIGN(1) (NOLOAD) : {
- *(.debug_line)
- *(.debug_line.*)
- }
- .debug_line_str ALIGN(1) (NOLOAD) : {
- *(.debug_line_str)
- }
- .debug_names ALIGN(4) (NOLOAD) : {
- *(.debug_names)
- }
- .debug_frame ALIGN(4) (NOLOAD) : {
- *(.debug_frame)
- }
- .debug_loc ALIGN(1) (NOLOAD) : {
- *(.debug_loc)
- }
- .debug_loclists ALIGN(4) (NOLOAD) : {
- *(.debug_loclists)
- }
- .debug_ranges ALIGN(8) (NOLOAD) : {
- *(.debug_ranges)
- }
- .debug_rnglists ALIGN(4) (NOLOAD) : {
- *(.debug_rnglists)
- }
- .debug_addr ALIGN(8) (NOLOAD) : {
- *(.debug_addr)
- }
- .debug_aranges ALIGN(1) (NOLOAD) : {
- *(.debug_aranges)
- }
- .debug_pubnames ALIGN(1) (NOLOAD) : {
- *(.debug_pubnames)
- }
- .debug_pubtypes ALIGN(1) (NOLOAD) : {
- *(.debug_pubtypes)
- }
- /* Trick the linker into setting the image size to no less than 16Mb. */
- __image_end__ = .;
- .pad ALIGN(__section_alignment__) : {
- . = __image_end__ < __image_base__ + MB(16) ? ALIGN(MB(16)) : .;
- }
#elif defined(XEN_BUILD_EFI)
/*
* Due to the way EFI support is currently implemented, these two symbols
efi = .;
#endif
+ /*
+ * Explicitly list debug sections, first of all to avoid these sections being
+ * viewed as "orphan" by the linker.
+ *
+ * For the PE output this is further necessary so that they don't end up at
+ * VA 0, which is below image base and thus invalid. Note that we're past
+ * _end here, so if these sections get loaded they'll be discarded at runtime
+ * anyway.
+ */
+ DECL_DEBUG(.debug_abbrev, 1)
+ DECL_DEBUG2(.debug_info, .gnu.linkonce.wi.*, 1)
+ DECL_DEBUG(.debug_types, 1)
+ DECL_DEBUG(.debug_str, 1)
+ DECL_DEBUG2(.debug_line, .debug_line.*, 1)
+ DECL_DEBUG(.debug_line_str, 1)
+ DECL_DEBUG(.debug_names, 4)
+ DECL_DEBUG(.debug_frame, 4)
+ DECL_DEBUG(.debug_loc, 1)
+ DECL_DEBUG(.debug_loclists, 4)
+ DECL_DEBUG(.debug_macinfo, 1)
+ DECL_DEBUG(.debug_macro, 1)
+ DECL_DEBUG(.debug_ranges, 8)
+ DECL_DEBUG(.debug_rnglists, 4)
+ DECL_DEBUG(.debug_addr, 8)
+ DECL_DEBUG(.debug_aranges, 1)
+ DECL_DEBUG(.debug_pubnames, 1)
+ DECL_DEBUG(.debug_pubtypes, 1)
+
+#ifdef EFI
+ /* Trick the linker into setting the image size to no less than 16Mb. */
+ __image_end__ = .;
+ .pad ALIGN(__section_alignment__) : {
+ . = __image_end__ < __image_base__ + MB(16) ? ALIGN(MB(16)) : .;
+ }
+#endif
+
#ifdef CONFIG_HYPERV_GUEST
hv_hcall_page = ABSOLUTE(HV_HCALL_PAGE - XEN_VIRT_START + __XEN_VIRT_START);
#endif
#ifdef EFI
*(.comment)
*(.comment.*)
- *(.note.Xen)
- *(.note.gnu.*)
+ *(.note.*)
#endif
}
.stab.index 0 : { *(.stab.index) }
.stab.indexstr 0 : { *(.stab.indexstr) }
.comment 0 : { *(.comment) }
+ /*
+ * LLVM ld also wants .symtab, .strtab, and .shstrtab placed. These look to
+ * be benign to GNU ld, so we can have them here unconditionally.
+ */
+ .symtab 0 : { *(.symtab) }
+ .strtab 0 : { *(.strtab) }
+ .shstrtab 0 : { *(.shstrtab) }
#endif
}
ASSERT(IS_ALIGNED(__bss_start, 8), "__bss_start misaligned")
ASSERT(IS_ALIGNED(__bss_end, 8), "__bss_end misaligned")
+#ifndef EFI
+ASSERT(!SIZEOF(.got), ".got non-empty")
+ASSERT(!SIZEOF(.got.plt), ".got.plt non-empty")
+ASSERT(!SIZEOF(.igot.plt), ".igot.plt non-empty")
+ASSERT(!SIZEOF(.iplt), ".iplt non-empty")
+ASSERT(!SIZEOF(.plt), ".plt non-empty")
+ASSERT(!SIZEOF(.rela), "leftover relocations")
+#endif
+
ASSERT((trampoline_end - trampoline_start) < TRAMPOLINE_SPACE - MBI_SPACE_MIN,
"not enough room for trampoline and mbi data")
ASSERT((wakeup_stack - wakeup_stack_start) >= WAKEUP_STACK_MIN,
projects / people / tklengyel / xen.git / commitdiff