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linux-hardened/arch/sh/include/asm/elf.h
Thomas Schwinge 4a71997a32 sh: Fix FDPIC binary loader 
Ensure that the aux table is properly initialized, even when optional features
are missing.  Without this, the FDPIC loader did not work.  This was meant to
be included in commit d5ab780305.

Signed-off-by: Thomas Schwinge <thomas@codesourcery.com>
Cc: stable@vger.kernel.org
Signed-off-by: Paul Mundt <lethal@linux-sh.org>
2013-01-11 21:02:57 +09:00

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#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
#define R_SH_REL32 2
#define R_SH_DIR8WPN 3
#define R_SH_IND12W 4
#define R_SH_DIR8WPL 5
#define R_SH_DIR8WPZ 6
#define R_SH_DIR8BP 7
#define R_SH_DIR8W 8
#define R_SH_DIR8L 9
#define R_SH_SWITCH16 25
#define R_SH_SWITCH32 26
#define R_SH_USES 27
#define R_SH_COUNT 28
#define R_SH_ALIGN 29
#define R_SH_CODE 30
#define R_SH_DATA 31
#define R_SH_LABEL 32
#define R_SH_SWITCH8 33
#define R_SH_GNU_VTINHERIT 34
#define R_SH_GNU_VTENTRY 35
#define R_SH_TLS_GD_32 144
#define R_SH_TLS_LD_32 145
#define R_SH_TLS_LDO_32 146
#define R_SH_TLS_IE_32 147
#define R_SH_TLS_LE_32 148
#define R_SH_TLS_DTPMOD32 149
#define R_SH_TLS_DTPOFF32 150
#define R_SH_TLS_TPOFF32 151
#define R_SH_GOT32 160
#define R_SH_PLT32 161
#define R_SH_COPY 162
#define R_SH_GLOB_DAT 163
#define R_SH_JMP_SLOT 164
#define R_SH_RELATIVE 165
#define R_SH_GOTOFF 166
#define R_SH_GOTPC 167
/* FDPIC relocs */
#define R_SH_GOT20 201
#define R_SH_GOTOFF20 202
#define R_SH_GOTFUNCDESC 203
#define R_SH_GOTFUNCDESC20 204
#define R_SH_GOTOFFFUNCDESC 205
#define R_SH_GOTOFFFUNCDESC20 206
#define R_SH_FUNCDESC 207
#define R_SH_FUNCDESC_VALUE 208
/* SHmedia relocs */
#define R_SH_IMM_LOW16 246
#define R_SH_IMM_LOW16_PCREL 247
#define R_SH_IMM_MEDLOW16 248
#define R_SH_IMM_MEDLOW16_PCREL 249
/* Keep this the last entry. */
#define R_SH_NUM 256
/*
* ELF register definitions..
*/
typedef unsigned long elf_greg_t;
#define ELF_NGREG (sizeof (struct pt_regs) / sizeof(elf_greg_t))
typedef elf_greg_t elf_gregset_t[ELF_NGREG];
typedef struct user_fpu_struct elf_fpregset_t;
/*
* These are used to set parameters in the core dumps.
*/
#define ELF_CLASS ELFCLASS32
#ifdef __LITTLE_ENDIAN__
#define ELF_DATA ELFDATA2LSB
#else
#define ELF_DATA ELFDATA2MSB
#endif
#define ELF_ARCH EM_SH
#ifdef __KERNEL__
/*
* 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_fdpic(x) ((x)->e_flags & EF_SH_FDPIC)
#define elf_check_const_displacement(x) ((x)->e_flags & EF_SH_PIC)
/*
* Enable dump using regset.
* This covers all of general/DSP/FPU regs.
*/
#define CORE_DUMP_USE_REGSET
#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
use of this is to invoke "./ld.so someprog" to test out a new version of
the loader. We need to make sure that it is out of the way of the program
that it will "exec", and that there is sufficient room for the brk. */
#define ELF_ET_DYN_BASE (2 * TASK_SIZE / 3)
#define ELF_CORE_COPY_REGS(_dest,_regs) \
memcpy((char *) &_dest, (char *) _regs, \
sizeof(struct pt_regs));
/* This yields a mask that user programs can use to figure out what
instruction set this CPU supports. This could be done in user space,
but it's not easy, and we've already done it here. */
#define ELF_HWCAP (boot_cpu_data.flags)
/* This yields a string that ld.so will use to load implementation
specific libraries for optimization. This is more specific in
intent than poking at uname or /proc/cpuinfo.
For the moment, we have only optimizations for the Intel generations,
but that could change... */
#define ELF_PLATFORM (utsname()->machine)
#ifdef __SH5__
#define ELF_PLAT_INIT(_r, load_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]=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->regs[15]=0; \
_r->regs[16]=0; _r->regs[17]=0; _r->regs[18]=0; _r->regs[19]=0; \
_r->regs[20]=0; _r->regs[21]=0; _r->regs[22]=0; _r->regs[23]=0; \
_r->regs[24]=0; _r->regs[25]=0; _r->regs[26]=0; _r->regs[27]=0; \
_r->regs[28]=0; _r->regs[29]=0; _r->regs[30]=0; _r->regs[31]=0; \
_r->regs[32]=0; _r->regs[33]=0; _r->regs[34]=0; _r->regs[35]=0; \
_r->regs[36]=0; _r->regs[37]=0; _r->regs[38]=0; _r->regs[39]=0; \
_r->regs[40]=0; _r->regs[41]=0; _r->regs[42]=0; _r->regs[43]=0; \
_r->regs[44]=0; _r->regs[45]=0; _r->regs[46]=0; _r->regs[47]=0; \
_r->regs[48]=0; _r->regs[49]=0; _r->regs[50]=0; _r->regs[51]=0; \
_r->regs[52]=0; _r->regs[53]=0; _r->regs[54]=0; _r->regs[55]=0; \
_r->regs[56]=0; _r->regs[57]=0; _r->regs[58]=0; _r->regs[59]=0; \
_r->regs[60]=0; _r->regs[61]=0; _r->regs[62]=0; \
_r->tregs[0]=0; _r->tregs[1]=0; _r->tregs[2]=0; _r->tregs[3]=0; \
_r->tregs[4]=0; _r->tregs[5]=0; _r->tregs[6]=0; _r->tregs[7]=0; \
_r->sr = SR_FD | SR_MMU; } while (0)
#else
#define ELF_PLAT_INIT(_r, load_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]=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) \
set_personality(PER_LINUX_32BIT | (current->personality & (~PER_MASK)))
#ifdef CONFIG_VSYSCALL
/* vDSO has arch_setup_additional_pages */
#define ARCH_HAS_SETUP_ADDITIONAL_PAGES
struct linux_binprm;
extern int arch_setup_additional_pages(struct linux_binprm *bprm,
int uses_interp);
extern unsigned int vdso_enabled;
extern void __kernel_vsyscall;
#define VDSO_BASE ((unsigned long)current->mm->context.vdso)
#define VDSO_SYM(x) (VDSO_BASE + (unsigned long)(x))
#define VSYSCALL_AUX_ENT \
if (vdso_enabled) \
NEW_AUX_ENT(AT_SYSINFO_EHDR, VDSO_BASE); \
else \
NEW_AUX_ENT(AT_IGNORE, 0)
#else
#define VSYSCALL_AUX_ENT NEW_AUX_ENT(AT_IGNORE, 0)
#endif /* CONFIG_VSYSCALL */
#ifdef CONFIG_SH_FPU
#define FPU_AUX_ENT NEW_AUX_ENT(AT_FPUCW, FPSCR_INIT)
#else
#define FPU_AUX_ENT NEW_AUX_ENT(AT_IGNORE, 0)
#endif
extern int l1i_cache_shape, l1d_cache_shape, l2_cache_shape;
/* update AT_VECTOR_SIZE_ARCH if the number of NEW_AUX_ENT entries changes */
#define ARCH_DLINFO \
do { \
/* Optional FPU initialization */ \
FPU_AUX_ENT; \
\
/* Optional vsyscall entry */ \
VSYSCALL_AUX_ENT; \
\
/* Cache desc */ \
NEW_AUX_ENT(AT_L1I_CACHESHAPE, l1i_cache_shape); \
NEW_AUX_ENT(AT_L1D_CACHESHAPE, l1d_cache_shape); \
NEW_AUX_ENT(AT_L2_CACHESHAPE, l2_cache_shape); \
} while (0)
#endif /* __KERNEL__ */
#endif /* __ASM_SH_ELF_H */
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