ex_tables.h revision cf8d5e41af582b9070576889dcc479397a19bf48 
1bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant/* libunwind - a platform-independent unwind library
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24bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
25bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#ifndef ARM_EX_TABLES_H
26bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant#define ARM_EX_TABLES_H
27bc8d3f97eb5c958007f2713238472e0c1c8fe02Howard Hinnant
28struct arm_exidx_entry {
29  uint32_t addr;
30  uint32_t data;
31};
32
33struct arm_exidx_table {
34  const char *name;
35  struct arm_exidx_entry *start;
36  struct arm_exidx_entry *end;
37  void *start_addr;
38  void *end_addr;
39#ifdef ARM_EXIDX_TABLE_MALLOC
40  struct arm_exidx_table *next;
41#endif
42};
43
44
45typedef enum arm_exbuf_cmd {
46  ARM_EXIDX_CMD_FINISH,
47  ARM_EXIDX_CMD_DATA_PUSH,
48  ARM_EXIDX_CMD_DATA_POP,
49  ARM_EXIDX_CMD_REG_POP,
50  ARM_EXIDX_CMD_REG_TO_SP,
51  ARM_EXIDX_CMD_VFP_POP,
52  ARM_EXIDX_CMD_WREG_POP,
53  ARM_EXIDX_CMD_WCGR_POP,
54  ARM_EXIDX_CMD_RESERVED,
55  ARM_EXIDX_CMD_REFUSED,
56} arm_exbuf_cmd_t;
57
58enum arm_exbuf_cmd_flags {
59  ARM_EXIDX_VFP_SHIFT_16 = 1 << 16,
60  ARM_EXIDX_VFP_DOUBLE = 1 << 17,
61};
62
63#define ARM_EXBUF_START(x)	(((x) >> 4) & 0x0f)
64#define ARM_EXBUF_COUNT(x)	((x) & 0x0f)
65#define ARM_EXBUF_END(x)	(ARM_EXBUF_START(x) + ARM_EXBUF_COUNT(x))
66
67struct arm_exbuf_data
68{
69  arm_exbuf_cmd_t cmd;
70  uint32_t data;
71};
72
73static inline void *
74prel31_to_addr (void *addr)
75{
76  uint32_t offset = ((long)*(uint32_t *)addr << 1) >> 1;
77  return (char *)addr + offset;
78}
79
80int arm_exidx_init_local (const char *appname);
81
82int arm_exidx_table_add (const char *name,
83    struct arm_exidx_entry *start, struct arm_exidx_entry *end);
84struct arm_exidx_table *arm_exidx_table_find (void *pc);
85struct arm_exidx_entry *arm_exidx_table_lookup (
86		struct arm_exidx_table *table, void *pc);
87
88void arm_exidx_section_find (struct elf_image *ei,
89		Elf_W (Shdr) **exidx, Elf_W (Shdr) **extbl);
90int arm_exidx_entry_lookup (struct elf_image *ei,
91		Elf_W (Shdr) *exidx, uint32_t ip);
92int arm_exidx_entry_extract (struct elf_image *ei,
93		Elf_W (Shdr) *exidx, Elf_W (Shdr) *extbl,
94		unsigned i, uint8_t *buf);
95int arm_exidx_extract (struct arm_exidx_entry *entry, uint8_t *buf);
96
97int arm_exidx_decode (const uint8_t *buf, uint8_t len,
98		      struct dwarf_cursor *c);
99int arm_exidx_apply_cmd (struct arm_exbuf_data *edata, struct dwarf_cursor *c);
100
101#endif // ARM_EX_TABLES_H
102