sh: Initial ELF FDPIC support.
This adds initial support for ELF FDPIC on MMU-less SH, as per version
0.2 of the ABI definition at:
http://www.codesourcery.com/public/docs/sh-fdpic/sh-fdpic-abi.txt
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
diff --git a/include/asm-sh/elf.h b/include/asm-sh/elf.h
index 05092da..f01449a 100644
--- a/include/asm-sh/elf.h
+++ b/include/asm-sh/elf.h
@@ -1,10 +1,15 @@
#ifndef __ASM_SH_ELF_H
#define __ASM_SH_ELF_H
+#include <linux/utsname.h>
#include <asm/auxvec.h>
#include <asm/ptrace.h>
#include <asm/user.h>
+/* ELF header e_flags defines */
+#define EF_SH_PIC 0x100 /* -fpic */
+#define EF_SH_FDPIC 0x8000 /* -mfdpic */
+
/* SH (particularly SHcompact) relocation types */
#define R_SH_NONE 0
#define R_SH_DIR32 1
@@ -43,6 +48,28 @@
#define R_SH_RELATIVE 165
#define R_SH_GOTOFF 166
#define R_SH_GOTPC 167
+
+/* FDPIC relocs */
+#define R_SH_GOT20 70
+#define R_SH_GOTOFF20 71
+#define R_SH_GOTFUNCDESC 72
+#define R_SH_GOTFUNCDESC20 73
+#define R_SH_GOTOFFFUNCDESC 74
+#define R_SH_GOTOFFFUNCDESC20 75
+#define R_SH_FUNCDESC 76
+#define R_SH_FUNCDESC_VALUE 77
+
+#if 0 /* XXX - later .. */
+#define R_SH_GOT20 198
+#define R_SH_GOTOFF20 199
+#define R_SH_GOTFUNCDESC 200
+#define R_SH_GOTFUNCDESC20 201
+#define R_SH_GOTOFFFUNCDESC 202
+#define R_SH_GOTOFFFUNCDESC20 203
+#define R_SH_FUNCDESC 204
+#define R_SH_FUNCDESC_VALUE 205
+#endif
+
/* SHmedia relocs */
#define R_SH_IMM_LOW16 246
#define R_SH_IMM_LOW16_PCREL 247
@@ -77,9 +104,12 @@
/*
* This is used to ensure we don't load something for the wrong architecture.
*/
-#define elf_check_arch(x) ( (x)->e_machine == EM_SH )
+#define elf_check_arch(x) ((x)->e_machine == EM_SH)
+#define elf_check_fdpic(x) ((x)->e_flags & EF_SH_FDPIC)
+#define elf_check_const_displacement(x) ((x)->e_flags & EF_SH_PIC)
#define USE_ELF_CORE_DUMP
+#define ELF_FDPIC_CORE_EFLAGS EF_SH_FDPIC
#define ELF_EXEC_PAGESIZE PAGE_SIZE
/* This is the location that an ET_DYN program is loaded if exec'ed. Typical
@@ -136,6 +166,27 @@
_r->regs[8]=0; _r->regs[9]=0; _r->regs[10]=0; _r->regs[11]=0; \
_r->regs[12]=0; _r->regs[13]=0; _r->regs[14]=0; \
_r->sr = SR_FD; } while (0)
+
+#define ELF_FDPIC_PLAT_INIT(_r, _exec_map_addr, _interp_map_addr, \
+ _dynamic_addr) \
+do { \
+ _r->regs[0] = 0; \
+ _r->regs[1] = 0; \
+ _r->regs[2] = 0; \
+ _r->regs[3] = 0; \
+ _r->regs[4] = 0; \
+ _r->regs[5] = 0; \
+ _r->regs[6] = 0; \
+ _r->regs[7] = 0; \
+ _r->regs[8] = _exec_map_addr; \
+ _r->regs[9] = _interp_map_addr; \
+ _r->regs[10] = _dynamic_addr; \
+ _r->regs[11] = 0; \
+ _r->regs[12] = 0; \
+ _r->regs[13] = 0; \
+ _r->regs[14] = 0; \
+ _r->sr = SR_FD; \
+} while (0)
#endif
#define SET_PERSONALITY(ex, ibcs2) set_personality(PER_LINUX_32BIT)