/arch/powerpc/kernel/vdso32/vdso32.lds.S

  1/* SPDX-License-Identifier: GPL-2.0 */
  2/*
  3 * This is the infamous ld script for the 32 bits vdso
  4 * library
  5 */
  6#include <asm/vdso.h>
  7
  8#ifdef __LITTLE_ENDIAN__
  9OUTPUT_FORMAT("elf32-powerpcle", "elf32-powerpcle", "elf32-powerpcle")
 10#else
 11OUTPUT_FORMAT("elf32-powerpc", "elf32-powerpc", "elf32-powerpc")
 12#endif
 13OUTPUT_ARCH(powerpc:common)
 14ENTRY(_start)
 15
 16SECTIONS
 17{
 18	. = VDSO32_LBASE + SIZEOF_HEADERS;
 19
 20	.hash          	: { *(.hash) }			:text
 21	.gnu.hash      	: { *(.gnu.hash) }
 22	.dynsym        	: { *(.dynsym) }
 23	.dynstr        	: { *(.dynstr) }
 24	.gnu.version   	: { *(.gnu.version) }
 25	.gnu.version_d 	: { *(.gnu.version_d) }
 26	.gnu.version_r 	: { *(.gnu.version_r) }
 27
 28	.note		: { *(.note.*) }		:text	:note
 29
 30	. = ALIGN(16);
 31	.text		: {
 32		*(.text .stub .text.* .gnu.linkonce.t.* __ftr_alt_*)
 33	}		      	      			:text
 34	PROVIDE(__etext = .);
 35	PROVIDE(_etext = .);
 36	PROVIDE(etext = .);
 37
 38	. = ALIGN(8);
 39	__ftr_fixup	: { *(__ftr_fixup) }
 40
 41	. = ALIGN(8);
 42	__mmu_ftr_fixup	: { *(__mmu_ftr_fixup) }
 43
 44	. = ALIGN(8);
 45	__lwsync_fixup	: { *(__lwsync_fixup) }
 46
 47#ifdef CONFIG_PPC64
 48	. = ALIGN(8);
 49	__fw_ftr_fixup	: { *(__fw_ftr_fixup) }
 50#endif
 51
 52	/*
 53	 * Other stuff is appended to the text segment:
 54	 */
 55	.rodata		: { *(.rodata .rodata.* .gnu.linkonce.r.*) }
 56	.rodata1	: { *(.rodata1) }
 57
 58	.eh_frame_hdr	: { *(.eh_frame_hdr) }		:text	:eh_frame_hdr
 59	.eh_frame	: { KEEP (*(.eh_frame)) }	:text
 60	.gcc_except_table : { *(.gcc_except_table) }
 61	.fixup		: { *(.fixup) }
 62
 63	.dynamic	: { *(.dynamic) }		:text	:dynamic
 64	.got		: { *(.got) }			:text
 65	.plt		: { *(.plt) }
 66
 67	_end = .;
 68	__end = .;
 69	PROVIDE(end = .);
 70
 71	/*
 72	 * Stabs debugging sections are here too.
 73	 */
 74	.stab 0 : { *(.stab) }
 75	.stabstr 0 : { *(.stabstr) }
 76	.stab.excl 0 : { *(.stab.excl) }
 77	.stab.exclstr 0 : { *(.stab.exclstr) }
 78	.stab.index 0 : { *(.stab.index) }
 79	.stab.indexstr 0 : { *(.stab.indexstr) }
 80	.comment       0 : { *(.comment) }
 81
 82	/*
 83	 * DWARF debug sections.
 84	 * Symbols in the DWARF debugging sections are relative to the beginning
 85	 * of the section so we begin them at 0.
 86	 */
 87	/* DWARF 1 */
 88	.debug          0 : { *(.debug) }
 89	.line           0 : { *(.line) }
 90	/* GNU DWARF 1 extensions */
 91	.debug_srcinfo  0 : { *(.debug_srcinfo) }
 92	.debug_sfnames  0 : { *(.debug_sfnames) }
 93	/* DWARF 1.1 and DWARF 2 */
 94	.debug_aranges  0 : { *(.debug_aranges) }
 95	.debug_pubnames 0 : { *(.debug_pubnames) }
 96	/* DWARF 2 */
 97	.debug_info     0 : { *(.debug_info .gnu.linkonce.wi.*) }
 98	.debug_abbrev   0 : { *(.debug_abbrev) }
 99	.debug_line     0 : { *(.debug_line) }
100	.debug_frame    0 : { *(.debug_frame) }
101	.debug_str      0 : { *(.debug_str) }
102	.debug_loc      0 : { *(.debug_loc) }
103	.debug_macinfo  0 : { *(.debug_macinfo) }
104	/* SGI/MIPS DWARF 2 extensions */
105	.debug_weaknames 0 : { *(.debug_weaknames) }
106	.debug_funcnames 0 : { *(.debug_funcnames) }
107	.debug_typenames 0 : { *(.debug_typenames) }
108	.debug_varnames  0 : { *(.debug_varnames) }
109
110	/DISCARD/	: {
111		*(.note.GNU-stack)
112		*(.data .data.* .gnu.linkonce.d.* .sdata*)
113		*(.bss .sbss .dynbss .dynsbss)
114	}
115}
116
117/*
118 * Very old versions of ld do not recognize this name token; use the constant.
119 */
120#define PT_GNU_EH_FRAME	0x6474e550
121
122/*
123 * We must supply the ELF program headers explicitly to get just one
124 * PT_LOAD segment, and set the flags explicitly to make segments read-only.
125 */
126PHDRS
127{
128	text		PT_LOAD FILEHDR PHDRS FLAGS(5);	/* PF_R|PF_X */
129	dynamic		PT_DYNAMIC FLAGS(4);		/* PF_R */
130	note		PT_NOTE FLAGS(4);		/* PF_R */
131	eh_frame_hdr	PT_GNU_EH_FRAME;
132}
133
134/*
135 * This controls what symbols we export from the DSO.
136 */
137VERSION
138{
139	VDSO_VERSION_STRING {
140	global:
141		/*
142		 * Has to be there for the kernel to find
143		 */
144		__kernel_datapage_offset;
145
146		__kernel_get_syscall_map;
147#ifndef CONFIG_PPC_BOOK3S_601
148		__kernel_gettimeofday;
149		__kernel_clock_gettime;
150		__kernel_clock_getres;
151		__kernel_time;
152		__kernel_get_tbfreq;
153#endif
154		__kernel_sync_dicache;
155		__kernel_sync_dicache_p5;
156		__kernel_sigtramp32;
157		__kernel_sigtramp_rt32;
158#if defined(CONFIG_PPC64) || !defined(CONFIG_SMP)
159		__kernel_getcpu;
160#endif
161
162	local: *;
163	};
164}