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-rw-r--r--include/asm-xtensa/elf.h92
1 files changed, 4 insertions, 88 deletions
diff --git a/include/asm-xtensa/elf.h b/include/asm-xtensa/elf.h
index 467384542502..0444507b438d 100644
--- a/include/asm-xtensa/elf.h
+++ b/include/asm-xtensa/elf.h
@@ -72,109 +72,25 @@
72 72
73/* ELF register definitions. This is needed for core dump support. */ 73/* ELF register definitions. This is needed for core dump support. */
74 74
75/*
76 * elf_gregset_t contains the application-level state in the following order:
77 * Processor info: config_version, cpuxy
78 * Processor state: pc, ps, exccause, excvaddr, wb, ws,
79 * lbeg, lend, lcount, sar
80 * GP regs: ar0 - arXX
81 */
82
83typedef unsigned long elf_greg_t; 75typedef unsigned long elf_greg_t;
84 76
85typedef struct { 77typedef struct {
86 elf_greg_t xchal_config_id0;
87 elf_greg_t xchal_config_id1;
88 elf_greg_t cpux;
89 elf_greg_t cpuy;
90 elf_greg_t pc; 78 elf_greg_t pc;
91 elf_greg_t ps; 79 elf_greg_t ps;
92 elf_greg_t exccause;
93 elf_greg_t excvaddr;
94 elf_greg_t windowbase;
95 elf_greg_t windowstart;
96 elf_greg_t lbeg; 80 elf_greg_t lbeg;
97 elf_greg_t lend; 81 elf_greg_t lend;
98 elf_greg_t lcount; 82 elf_greg_t lcount;
99 elf_greg_t sar; 83 elf_greg_t sar;
100 elf_greg_t syscall; 84 elf_greg_t windowstart;
101 elf_greg_t ar[64]; 85 elf_greg_t reserved[9+48];
86 elf_greg_t a[64];
102} xtensa_gregset_t; 87} xtensa_gregset_t;
103 88
104#define ELF_NGREG (sizeof(xtensa_gregset_t) / sizeof(elf_greg_t)) 89#define ELF_NGREG (sizeof(xtensa_gregset_t) / sizeof(elf_greg_t))
105 90
106typedef elf_greg_t elf_gregset_t[ELF_NGREG]; 91typedef elf_greg_t elf_gregset_t[ELF_NGREG];
107 92
108/* 93#define ELF_NFPREG 18
109 * Compute the size of the coprocessor and extra state layout (register info)
110 * table (in bytes).
111 * This is actually the maximum size of the table, as opposed to the size,
112 * which is available from the _xtensa_reginfo_table_size global variable.
113 *
114 * (See also arch/xtensa/kernel/coprocessor.S)
115 *
116 */
117
118#ifndef XCHAL_EXTRA_SA_CONTENTS_LIBDB_NUM
119# define XTENSA_CPE_LTABLE_SIZE 0
120#else
121# define XTENSA_CPE_SEGMENT(num) (num ? (1+num) : 0)
122# define XTENSA_CPE_LTABLE_ENTRIES \
123 ( XTENSA_CPE_SEGMENT(XCHAL_EXTRA_SA_CONTENTS_LIBDB_NUM) \
124 + XTENSA_CPE_SEGMENT(XCHAL_CP0_SA_CONTENTS_LIBDB_NUM) \
125 + XTENSA_CPE_SEGMENT(XCHAL_CP1_SA_CONTENTS_LIBDB_NUM) \
126 + XTENSA_CPE_SEGMENT(XCHAL_CP2_SA_CONTENTS_LIBDB_NUM) \
127 + XTENSA_CPE_SEGMENT(XCHAL_CP3_SA_CONTENTS_LIBDB_NUM) \
128 + XTENSA_CPE_SEGMENT(XCHAL_CP4_SA_CONTENTS_LIBDB_NUM) \
129 + XTENSA_CPE_SEGMENT(XCHAL_CP5_SA_CONTENTS_LIBDB_NUM) \
130 + XTENSA_CPE_SEGMENT(XCHAL_CP6_SA_CONTENTS_LIBDB_NUM) \
131 + XTENSA_CPE_SEGMENT(XCHAL_CP7_SA_CONTENTS_LIBDB_NUM) \
132 + 1 /* final entry */ \
133 )
134# define XTENSA_CPE_LTABLE_SIZE (XTENSA_CPE_LTABLE_ENTRIES * 8)
135#endif
136
137
138/*
139 * Instantiations of the elf_fpregset_t type contain, in most
140 * architectures, the floating point (FPU) register set.
141 * For Xtensa, this type is extended to contain all custom state,
142 * ie. coprocessor and "extra" (non-coprocessor) state (including,
143 * for example, TIE-defined states and register files; as well
144 * as other optional processor state).
145 * This includes FPU state if a floating-point coprocessor happens
146 * to have been configured within the Xtensa processor.
147 *
148 * TOTAL_FPREGS_SIZE is the required size (without rounding)
149 * of elf_fpregset_t. It provides space for the following:
150 *
151 * a) 32-bit mask of active coprocessors for this task (similar
152 * to CPENABLE in single-threaded Xtensa processor systems)
153 *
154 * b) table describing the layout of custom states (ie. of
155 * individual registers, etc) within the save areas
156 *
157 * c) save areas for each coprocessor and for non-coprocessor
158 * ("extra") state
159 *
160 * Note that save areas may require up to 16-byte alignment when
161 * accessed by save/restore sequences. We do not need to ensure
162 * such alignment in an elf_fpregset_t structure because custom
163 * state is not directly loaded/stored into it; rather, save area
164 * contents are copied to elf_fpregset_t from the active save areas
165 * (see 'struct task_struct' definition in processor.h for that)
166 * using memcpy(). But we do allow space for such alignment,
167 * to allow optimizations of layout and copying.
168 */
169#if 0
170#define TOTAL_FPREGS_SIZE \
171 (4 + XTENSA_CPE_LTABLE_SIZE + XTENSA_CP_EXTRA_SIZE)
172#define ELF_NFPREG \
173 ((TOTAL_FPREGS_SIZE + sizeof(elf_fpreg_t) - 1) / sizeof(elf_fpreg_t))
174#else
175#define TOTAL_FPREGS_SIZE 0
176#define ELF_NFPREG 0
177#endif
178 94
179typedef unsigned int elf_fpreg_t; 95typedef unsigned int elf_fpreg_t;
180typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG]; 96typedef elf_fpreg_t elf_fpregset_t[ELF_NFPREG];