mirror of
https://github.com/espressif/esp-idf.git
synced 2024-10-05 20:47:46 -04:00
eeaa40f71d
Closes https://github.com/espressif/esp-idf/issues/7866 A minimal x86 implementation has also been added, it is used to perform a host test.
136 lines
4.9 KiB
C
136 lines
4.9 KiB
C
/*
|
|
* SPDX-FileCopyrightText: 2020-2022 Espressif Systems (Shanghai) CO LTD
|
|
*
|
|
* SPDX-License-Identifier: Apache-2.0
|
|
*/
|
|
|
|
#ifndef LIBUNWIND_H
|
|
#define LIBUNWIND_H
|
|
|
|
#include "sdkconfig.h"
|
|
#include <stddef.h>
|
|
#include <stdint.h>
|
|
|
|
#if CONFIG_IDF_TARGET_ARCH_RISCV
|
|
#include "libunwind-riscv.h"
|
|
#elif CONFIG_IDF_TARGET_X86
|
|
#include "libunwind-x86.h"
|
|
#else
|
|
/* This header must be a standalone one, so, it shall not trigger an error when
|
|
* pre-processed without including any of the architecture header above.
|
|
* The implementation can trigger a compile error if UNW_UNKNOWN_TARGET
|
|
* macro is defined. */
|
|
#define UNW_UNKNOWN_TARGET 1
|
|
typedef void* ExecutionFrame;
|
|
#endif
|
|
|
|
#ifdef __cplusplus
|
|
extern "C" {
|
|
#endif
|
|
|
|
/* Error codes returned by the functions defined below */
|
|
#define UNW_ESUCCESS 0
|
|
#define UNW_EUNSPEC 1 /* General failure */
|
|
#define UNW_EBADREG 3 /* Register given is wrong */
|
|
#define UNW_ESTOPUNWIND 5
|
|
#define UNW_EINVAL 8 /* Bad parameter or unimplemented operation */
|
|
#define UNW_EBADVERSION 9
|
|
#define UNW_ENOINFO 10
|
|
|
|
/* A libunwind context is the equivalent of an ESP-IDF ExecutionFrame */
|
|
typedef ExecutionFrame unw_context_t;
|
|
|
|
/* A register number is an unsigned word in our case */
|
|
typedef uint32_t unw_regnum_t;
|
|
|
|
/* In our current implementation, a cursor is the same as a context */
|
|
typedef unw_context_t unw_cursor_t;
|
|
|
|
/* long should represent the size of a CPU register */
|
|
typedef unsigned long unw_word_t;
|
|
|
|
/* At the moment, we don't support the operations using the following types,
|
|
* so just set them to void* */
|
|
typedef void* unw_addr_space_t;
|
|
typedef void* unw_fpreg_t;
|
|
|
|
/**
|
|
* @brief Get the current CPU context.
|
|
*
|
|
* @param[out] ctx Pointer to `unw_context_t` structure. It must not be NULL
|
|
* as it will be filled with the CPU registers value
|
|
*
|
|
* @return UNW_ESUCCESS on success, -UNW_EUNSPEC if ctx is NULL
|
|
*
|
|
* @note This function MUST be inlined. Marking it as "static inline" or
|
|
* __attribute__((always_inline)) does not guarantee that it will inlined by
|
|
* the compiler for all the architectures. Thus, define this function as a macro.
|
|
* @note If the caller of this function returns, all the pointers, contexts, cursors
|
|
* generated out of the initial returned context shall be considered invalid and
|
|
* thus, must **not** be used.
|
|
*/
|
|
#define unw_getcontext(ctx) ({ int retval; \
|
|
if (ctx == NULL) { \
|
|
retval = -UNW_EUNSPEC; \
|
|
} else { \
|
|
UNW_GET_CONTEXT(ctx); \
|
|
retval = UNW_ESUCCESS; \
|
|
} \
|
|
retval; \
|
|
})
|
|
|
|
/**
|
|
* @brief Initialize a cursor on a local context. Multiple cursor can be initialized on
|
|
* a given CPU context, they can then be manipulated independently.
|
|
*
|
|
* @param[out] c Pointer on cursor to be returned. Must not be NULL
|
|
* @param[in] ctx Pointer on the context returned by the function `unw_getcontext`
|
|
*
|
|
* @return UNW_ESUCCESS on success, -UNW_EUNSPEC if one of the parameter is NULL.
|
|
*/
|
|
int unw_init_local(unw_cursor_t* c, unw_context_t* ctx);
|
|
|
|
/**
|
|
* @brief Perform a step "up" on the given cursor. After calling this function, the
|
|
* cursor will point to the caller's CPU context. Thus, it is then possible
|
|
* to retrieve the caller's address by getting the PC register out of the cursor.
|
|
* Check `unw_get_reg` function for this.
|
|
*
|
|
* @param[in] cp Current cursor
|
|
*
|
|
* @returns 0 if the previous frame was the last one
|
|
* @returns Positive value on success
|
|
* @returns -UNW_EBADVERSION if the DWARF information's version is not compatible with the eh_frame_parser implementation
|
|
* @returns -UNW_ENOINFO if the caller information are not present in the binary. (if the caller is in ROM for example)
|
|
* @returns -UNW_ESTOPUNWIND if unwinding is terminated
|
|
*/
|
|
int unw_step(unw_cursor_t* cp);
|
|
|
|
/**
|
|
* @brief Get the value of a CPU register from a given cursor.
|
|
*
|
|
* @param[in] cp Pointer to the cursor
|
|
* @param reg Register number to retrieve the value of
|
|
* @param[out] valp Pointer that will be filled with the register value
|
|
*
|
|
* @returns UNW_ESUCCESS on success
|
|
* @returns -UNW_EUNSPEC if any pointer passed is NULL
|
|
* @returns -UNW_EBADREG if the register number is invalid
|
|
*/
|
|
int unw_get_reg(unw_cursor_t* cp, unw_regnum_t reg, unw_word_t* valp);
|
|
|
|
/**
|
|
* @brief Set the value of a CPU register in a given cursor.
|
|
*
|
|
* @param[in]cp Pointer to the cursor
|
|
* @param reg Register number to set the value of
|
|
* @param val New register value
|
|
*
|
|
* @returns UNW_ESUCCESS on success
|
|
* @returns -UNW_EUNSPEC if the pointer passed is NULL
|
|
* @returns -UNW_EBADREG if the register number is invalid
|
|
*/
|
|
int unw_set_reg(unw_cursor_t* cp, unw_regnum_t reg, unw_word_t val);
|
|
|
|
#endif // LIBUNWIND_H
|