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Linux/arch/hexagon/include/asm/elf.h

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  1 /*
  2  * ELF definitions for the Hexagon architecture
  3  *
  4  * Copyright (c) 2010-2013, The Linux Foundation. All rights reserved.
  5  *
  6  * This program is free software; you can redistribute it and/or modify
  7  * it under the terms of the GNU General Public License version 2 and
  8  * only version 2 as published by the Free Software Foundation.
  9  *
 10  * This program is distributed in the hope that it will be useful,
 11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
 12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 13  * GNU General Public License for more details.
 14  *
 15  * You should have received a copy of the GNU General Public License
 16  * along with this program; if not, write to the Free Software
 17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
 18  * 02110-1301, USA.
 19  */
 20 
 21 #ifndef __ASM_ELF_H
 22 #define __ASM_ELF_H
 23 
 24 #include <asm/ptrace.h>
 25 #include <asm/user.h>
 26 
 27 /*
 28  * This should really be in linux/elf-em.h.
 29  */
 30 #define EM_HEXAGON      164   /* QUALCOMM Hexagon */
 31 
 32 struct elf32_hdr;
 33 
 34 /*
 35  * ELF header e_flags defines.
 36  */
 37 
 38 /*  should have stuff like "CPU type" and maybe "ABI version", etc  */
 39 
 40 /* Hexagon relocations */
 41   /* V2 */
 42 #define R_HEXAGON_NONE           0
 43 #define R_HEXAGON_B22_PCREL      1
 44 #define R_HEXAGON_B15_PCREL      2
 45 #define R_HEXAGON_B7_PCREL       3
 46 #define R_HEXAGON_LO16           4
 47 #define R_HEXAGON_HI16           5
 48 #define R_HEXAGON_32             6
 49 #define R_HEXAGON_16             7
 50 #define R_HEXAGON_8              8
 51 #define R_HEXAGON_GPREL16_0      9
 52 #define R_HEXAGON_GPREL16_1     10
 53 #define R_HEXAGON_GPREL16_2     11
 54 #define R_HEXAGON_GPREL16_3     12
 55 #define R_HEXAGON_HL16          13
 56   /* V3 */
 57 #define R_HEXAGON_B13_PCREL     14
 58   /* V4 */
 59 #define R_HEXAGON_B9_PCREL      15
 60   /* V4 (extenders) */
 61 #define R_HEXAGON_B32_PCREL_X   16
 62 #define R_HEXAGON_32_6_X        17
 63   /* V4 (extended) */
 64 #define R_HEXAGON_B22_PCREL_X   18
 65 #define R_HEXAGON_B15_PCREL_X   19
 66 #define R_HEXAGON_B13_PCREL_X   20
 67 #define R_HEXAGON_B9_PCREL_X    21
 68 #define R_HEXAGON_B7_PCREL_X    22
 69 #define R_HEXAGON_16_X          23
 70 #define R_HEXAGON_12_X          24
 71 #define R_HEXAGON_11_X          25
 72 #define R_HEXAGON_10_X          26
 73 #define R_HEXAGON_9_X           27
 74 #define R_HEXAGON_8_X           28
 75 #define R_HEXAGON_7_X           29
 76 #define R_HEXAGON_6_X           30
 77   /* V2 PIC */
 78 #define R_HEXAGON_32_PCREL      31
 79 #define R_HEXAGON_COPY          32
 80 #define R_HEXAGON_GLOB_DAT      33
 81 #define R_HEXAGON_JMP_SLOT      34
 82 #define R_HEXAGON_RELATIVE      35
 83 #define R_HEXAGON_PLT_B22_PCREL 36
 84 #define R_HEXAGON_GOTOFF_LO16   37
 85 #define R_HEXAGON_GOTOFF_HI16   38
 86 #define R_HEXAGON_GOTOFF_32     39
 87 #define R_HEXAGON_GOT_LO16      40
 88 #define R_HEXAGON_GOT_HI16      41
 89 #define R_HEXAGON_GOT_32        42
 90 #define R_HEXAGON_GOT_16        43
 91 
 92 /*
 93  * ELF register definitions..
 94  */
 95 typedef unsigned long elf_greg_t;
 96 
 97 typedef struct user_regs_struct elf_gregset_t;
 98 #define ELF_NGREG (sizeof(elf_gregset_t)/sizeof(unsigned long))
 99 
100 /*  Placeholder  */
101 typedef unsigned long elf_fpregset_t;
102 
103 /*
104  * Bypass the whole "regsets" thing for now and use the define.
105  */
106 
107 #if CONFIG_HEXAGON_ARCH_VERSION >= 4
108 #define CS_COPYREGS(DEST,REGS) \
109 do {\
110         DEST.cs0 = REGS->cs0;\
111         DEST.cs1 = REGS->cs1;\
112 } while (0)
113 #else
114 #define CS_COPYREGS(DEST,REGS)
115 #endif
116 
117 #define ELF_CORE_COPY_REGS(DEST, REGS)  \
118 do {                                    \
119         DEST.r0 = REGS->r00;            \
120         DEST.r1 = REGS->r01;            \
121         DEST.r2 = REGS->r02;            \
122         DEST.r3 = REGS->r03;            \
123         DEST.r4 = REGS->r04;            \
124         DEST.r5 = REGS->r05;            \
125         DEST.r6 = REGS->r06;            \
126         DEST.r7 = REGS->r07;            \
127         DEST.r8 = REGS->r08;            \
128         DEST.r9 = REGS->r09;            \
129         DEST.r10 = REGS->r10;           \
130         DEST.r11 = REGS->r11;           \
131         DEST.r12 = REGS->r12;           \
132         DEST.r13 = REGS->r13;           \
133         DEST.r14 = REGS->r14;           \
134         DEST.r15 = REGS->r15;           \
135         DEST.r16 = REGS->r16;           \
136         DEST.r17 = REGS->r17;           \
137         DEST.r18 = REGS->r18;           \
138         DEST.r19 = REGS->r19;           \
139         DEST.r20 = REGS->r20;           \
140         DEST.r21 = REGS->r21;           \
141         DEST.r22 = REGS->r22;           \
142         DEST.r23 = REGS->r23;           \
143         DEST.r24 = REGS->r24;           \
144         DEST.r25 = REGS->r25;           \
145         DEST.r26 = REGS->r26;           \
146         DEST.r27 = REGS->r27;           \
147         DEST.r28 = REGS->r28;           \
148         DEST.r29 = pt_psp(REGS);        \
149         DEST.r30 = REGS->r30;           \
150         DEST.r31 = REGS->r31;           \
151         DEST.sa0 = REGS->sa0;           \
152         DEST.lc0 = REGS->lc0;           \
153         DEST.sa1 = REGS->sa1;           \
154         DEST.lc1 = REGS->lc1;           \
155         DEST.m0 = REGS->m0;             \
156         DEST.m1 = REGS->m1;             \
157         DEST.usr = REGS->usr;           \
158         DEST.p3_0 = REGS->preds;        \
159         DEST.gp = REGS->gp;             \
160         DEST.ugp = REGS->ugp;           \
161         CS_COPYREGS(DEST,REGS);         \
162         DEST.pc = pt_elr(REGS);         \
163         DEST.cause = pt_cause(REGS);    \
164         DEST.badva = pt_badva(REGS);    \
165 } while (0);
166 
167 /*
168  * This is used to ensure we don't load something for the wrong architecture.
169  * Checks the machine and ABI type.
170  */
171 #define elf_check_arch(hdr)     ((hdr)->e_machine == EM_HEXAGON)
172 
173 /*
174  * These are used to set parameters in the core dumps.
175  */
176 #define ELF_CLASS       ELFCLASS32
177 #define ELF_DATA        ELFDATA2LSB
178 #define ELF_ARCH        EM_HEXAGON
179 
180 #if CONFIG_HEXAGON_ARCH_VERSION == 2
181 #define ELF_CORE_EFLAGS 0x1
182 #endif
183 
184 #if CONFIG_HEXAGON_ARCH_VERSION == 3
185 #define ELF_CORE_EFLAGS 0x2
186 #endif
187 
188 #if CONFIG_HEXAGON_ARCH_VERSION == 4
189 #define ELF_CORE_EFLAGS 0x3
190 #endif
191 
192 /*
193  * Some architectures have ld.so set up a pointer to a function
194  * to be registered using atexit, to facilitate cleanup.  So that
195  * static executables will be well-behaved, we would null the register
196  * in question here, in the pt_regs structure passed.  For now,
197  * leave it a null macro.
198  */
199 #define ELF_PLAT_INIT(regs, load_addr) do { } while (0)
200 
201 #define USE_ELF_CORE_DUMP
202 #define CORE_DUMP_USE_REGSET
203 
204 /* Hrm is this going to cause problems for changing PAGE_SIZE?  */
205 #define ELF_EXEC_PAGESIZE       PAGE_SIZE
206 
207 /*
208  * This is the location that an ET_DYN program is loaded if exec'ed.  Typical
209  * use of this is to invoke "./ld.so someprog" to test out a new version of
210  * the loader.  We need to make sure that it is out of the way of the program
211  * that it will "exec", and that there is sufficient room for the brk.
212  */
213 #define ELF_ET_DYN_BASE         0x08000000UL
214 
215 /*
216  * This yields a mask that user programs can use to figure out what
217  * instruction set this cpu supports.
218  */
219 #define ELF_HWCAP       (0)
220 
221 /*
222  * This yields a string that ld.so will use to load implementation
223  * specific libraries for optimization.  This is more specific in
224  * intent than poking at uname or /proc/cpuinfo.
225  */
226 #define ELF_PLATFORM  (NULL)
227 
228 #define ARCH_HAS_SETUP_ADDITIONAL_PAGES 1
229 struct linux_binprm;
230 extern int arch_setup_additional_pages(struct linux_binprm *bprm,
231                                        int uses_interp);
232 
233 
234 #endif
235 

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