104 lines
2.6 KiB
C
104 lines
2.6 KiB
C
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/*
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* gdbstub helpers
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*
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* These are all used by the various frontends and have to be host
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* aware to ensure things are store in target order.
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*
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* Copyright (c) 2022 Linaro Ltd
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*
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* SPDX-License-Identifier: GPL-2.0-or-later
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*/
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#ifndef _GDBSTUB_HELPERS_H_
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#define _GDBSTUB_HELPERS_H_
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#ifdef NEED_CPU_H
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#include "cpu.h"
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/*
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* The GDB remote protocol transfers values in target byte order. As
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* the gdbstub may be batching up several register values we always
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* append to the array.
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*/
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static inline int gdb_get_reg8(GByteArray *buf, uint8_t val)
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{
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g_byte_array_append(buf, &val, 1);
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return 1;
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}
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static inline int gdb_get_reg16(GByteArray *buf, uint16_t val)
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{
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uint16_t to_word = tswap16(val);
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g_byte_array_append(buf, (uint8_t *) &to_word, 2);
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return 2;
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}
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static inline int gdb_get_reg32(GByteArray *buf, uint32_t val)
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{
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uint32_t to_long = tswap32(val);
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g_byte_array_append(buf, (uint8_t *) &to_long, 4);
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return 4;
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}
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static inline int gdb_get_reg64(GByteArray *buf, uint64_t val)
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{
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uint64_t to_quad = tswap64(val);
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g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
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return 8;
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}
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static inline int gdb_get_reg128(GByteArray *buf, uint64_t val_hi,
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uint64_t val_lo)
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{
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uint64_t to_quad;
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#if TARGET_BIG_ENDIAN
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to_quad = tswap64(val_hi);
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g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
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to_quad = tswap64(val_lo);
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g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
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#else
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to_quad = tswap64(val_lo);
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g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
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to_quad = tswap64(val_hi);
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g_byte_array_append(buf, (uint8_t *) &to_quad, 8);
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#endif
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return 16;
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}
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static inline int gdb_get_zeroes(GByteArray *array, size_t len)
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{
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guint oldlen = array->len;
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g_byte_array_set_size(array, oldlen + len);
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memset(array->data + oldlen, 0, len);
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return len;
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}
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/**
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* gdb_get_reg_ptr: get pointer to start of last element
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* @len: length of element
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*
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* This is a helper function to extract the pointer to the last
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* element for additional processing. Some front-ends do additional
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* dynamic swapping of the elements based on CPU state.
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*/
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static inline uint8_t *gdb_get_reg_ptr(GByteArray *buf, int len)
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{
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return buf->data + buf->len - len;
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}
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#if TARGET_LONG_BITS == 64
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#define gdb_get_regl(buf, val) gdb_get_reg64(buf, val)
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#define ldtul_p(addr) ldq_p(addr)
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#else
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#define gdb_get_regl(buf, val) gdb_get_reg32(buf, val)
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#define ldtul_p(addr) ldl_p(addr)
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#endif
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#else
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#error "gdbstub helpers should only be included by target specific code"
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#endif
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#endif /* _GDBSTUB_HELPERS_H_ */
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