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https://github.com/tobast/libunwind-eh_elf.git
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ffc474b8c8
Handles lookup, extracting unwind entries, and decoding the entry using a callback mechanism. Signed-off-by: Ken Werner <ken.werner@linaro.org>
129 lines
3.6 KiB
C
129 lines
3.6 KiB
C
/* libunwind - a platform-independent unwind library
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Copyright 2011 Linaro Limited
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This file is part of libunwind.
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Permission is hereby granted, free of charge, to any person obtaining
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a copy of this software and associated documentation files (the
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"Software"), to deal in the Software without restriction, including
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without limitation the rights to use, copy, modify, merge, publish,
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distribute, sublicense, and/or sell copies of the Software, and to
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permit persons to whom the Software is furnished to do so, subject to
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the following conditions:
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The above copyright notice and this permission notice shall be
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included in all copies or substantial portions of the Software.
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THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
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MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE
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LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION
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OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION
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WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. */
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#ifndef ARM_EX_TABLES_H
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#define ARM_EX_TABLES_H
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struct arm_exidx_entry {
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uint32_t addr;
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uint32_t data;
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};
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struct arm_exidx_table {
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const char *name;
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struct arm_exidx_entry *start;
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struct arm_exidx_entry *end;
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void *start_addr;
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void *end_addr;
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#ifdef ARM_EXIDX_TABLE_MALLOC
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struct arm_exidx_table *next;
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#endif
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};
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typedef enum arm_exbuf_cmd {
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ARM_EXIDX_CMD_FINISH,
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ARM_EXIDX_CMD_DATA_PUSH,
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ARM_EXIDX_CMD_DATA_POP,
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ARM_EXIDX_CMD_REG_POP,
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ARM_EXIDX_CMD_REG_TO_SP,
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ARM_EXIDX_CMD_VFP_POP,
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ARM_EXIDX_CMD_WREG_POP,
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ARM_EXIDX_CMD_WCGR_POP,
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ARM_EXIDX_CMD_RESERVED,
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ARM_EXIDX_CMD_REFUSED,
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} arm_exbuf_cmd_t;
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enum arm_exbuf_cmd_flags {
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ARM_EXIDX_VFP_SHIFT_16 = 1 << 16,
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ARM_EXIDX_VFP_DOUBLE = 1 << 17,
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};
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#define ARM_EXBUF_START(x) (((x) >> 4) & 0x0f)
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#define ARM_EXBUF_COUNT(x) ((x) & 0x0f)
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#define ARM_EXBUF_END(x) (ARM_EXBUF_START(x) + ARM_EXBUF_COUNT(x))
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struct arm_exbuf_callback_data {
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uint8_t ops[11];
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uint8_t n_ops;
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arm_exbuf_cmd_t cmd;
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uint32_t data;
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void *cb_data;
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};
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typedef int (*arm_exbuf_callback_t)(struct arm_exbuf_callback_data *aecb);
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static inline void *
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prel31_to_addr (void *addr)
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{
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uint32_t offset = ((long)*(uint32_t *)addr << 1) >> 1;
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return (char *)addr + offset;
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}
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int arm_exidx_init_local (const char *appname);
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int arm_exidx_table_add (const char *name,
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struct arm_exidx_entry *start, struct arm_exidx_entry *end);
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struct arm_exidx_table *arm_exidx_table_find (void *pc);
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struct arm_exidx_entry *arm_exidx_table_lookup (
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struct arm_exidx_table *table, void *pc);
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void arm_exidx_section_find (struct elf_image *ei,
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Elf_W (Shdr) **exidx, Elf_W (Shdr) **extbl);
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int arm_exidx_entry_lookup (struct elf_image *ei,
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Elf_W (Shdr) *exidx, uint32_t ip);
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int arm_exidx_entry_extract (struct elf_image *ei,
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Elf_W (Shdr) *exidx, Elf_W (Shdr) *extbl,
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unsigned i, uint8_t *buf);
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int arm_exidx_extract (struct arm_exidx_entry *entry, uint8_t *buf);
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int arm_exidx_decode (const uint8_t *buf, uint8_t len,
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arm_exbuf_callback_t cb, void *cb_data);
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struct arm_stackframe {
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void *fp;
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void *sp;
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void *lr;
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void *pc;
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};
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struct arm_exidx_vrs {
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uint32_t vrs[16];
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};
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enum arm_exidx_vrs_regs {
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FP_thumb = 7,
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FP_arm = 11,
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SP = 13,
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LR = 14,
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PC = 15,
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};
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void arm_exidx_frame_to_vrs(struct arm_stackframe *f, struct arm_exidx_vrs *s);
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int arm_exidx_vrs_to_frame(struct arm_exidx_vrs *s, struct arm_stackframe *f);
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int arm_exidx_vrs_callback (struct arm_exbuf_callback_data *aecd);
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#endif // ARM_EX_TABLES_H
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