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https://github.com/Atmosphere-NX/Atmosphere
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thermosphere: rewrite semihosting
This commit is contained in:
TuxSH
parent
0cb5eab933
commit
56d764d09c
3 changed files with 201 additions and 274 deletions
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@ -1,209 +0,0 @@
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// Adapted from Arm TF
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/*
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* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <errno.h>
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#include <string.h>
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#include "semihosting.h"
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long semihosting_call(unsigned long operation,
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void *system_block_address);
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typedef struct {
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const char *file_name;
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unsigned long mode;
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size_t name_length;
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} smh_file_open_block_t;
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typedef struct {
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long handle;
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uintptr_t buffer;
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size_t length;
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} smh_file_read_write_block_t;
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typedef struct {
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long handle;
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ssize_t location;
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} smh_file_seek_block_t;
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typedef struct {
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char *command_line;
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size_t command_length;
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} smh_system_block_t;
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long semihosting_file_open(const char *file_name, size_t mode)
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{
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smh_file_open_block_t open_block;
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open_block.file_name = file_name;
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open_block.mode = mode;
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open_block.name_length = strlen(file_name);
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return semihosting_call(SEMIHOSTING_SYS_OPEN,
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(void *) &open_block);
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}
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long semihosting_file_seek(long file_handle, ssize_t offset)
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{
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smh_file_seek_block_t seek_block;
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long result;
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seek_block.handle = file_handle;
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seek_block.location = offset;
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result = semihosting_call(SEMIHOSTING_SYS_SEEK,
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(void *) &seek_block);
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if (result)
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result = semihosting_call(SEMIHOSTING_SYS_ERRNO, 0);
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return result;
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}
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long semihosting_file_read(long file_handle, size_t *length, uintptr_t buffer)
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{
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smh_file_read_write_block_t read_block;
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long result = -EINVAL;
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if ((length == NULL) || (buffer == (uintptr_t)NULL))
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return result;
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read_block.handle = file_handle;
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read_block.buffer = buffer;
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read_block.length = *length;
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result = semihosting_call(SEMIHOSTING_SYS_READ,
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(void *) &read_block);
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if (result == *length) {
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return -EINVAL;
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} else if (result < *length) {
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*length -= result;
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return 0;
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} else
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return result;
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}
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long semihosting_file_write(long file_handle,
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size_t *length,
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const uintptr_t buffer)
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{
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smh_file_read_write_block_t write_block;
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long result = -EINVAL;
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if ((length == NULL) || (buffer == (uintptr_t)NULL))
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return -EINVAL;
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write_block.handle = file_handle;
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write_block.buffer = (uintptr_t)buffer; /* cast away const */
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write_block.length = *length;
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result = semihosting_call(SEMIHOSTING_SYS_WRITE,
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(void *) &write_block);
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*length = result;
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return (result == 0) ? 0 : -EINVAL;
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}
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long semihosting_file_close(long file_handle)
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{
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return semihosting_call(SEMIHOSTING_SYS_CLOSE,
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(void *) &file_handle);
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}
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long semihosting_file_length(long file_handle)
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{
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return semihosting_call(SEMIHOSTING_SYS_FLEN,
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(void *) &file_handle);
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}
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char semihosting_read_char(void)
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{
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return semihosting_call(SEMIHOSTING_SYS_READC, NULL);
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}
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void semihosting_write_char(char character)
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{
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semihosting_call(SEMIHOSTING_SYS_WRITEC, (void *) &character);
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}
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void semihosting_write_string(const char *string)
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{
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semihosting_call(SEMIHOSTING_SYS_WRITE0, (void *) string);
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}
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long semihosting_system(char *command_line)
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{
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smh_system_block_t system_block;
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system_block.command_line = command_line;
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system_block.command_length = strlen(command_line);
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return semihosting_call(SEMIHOSTING_SYS_SYSTEM,
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(void *) &system_block);
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}
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long semihosting_get_flen(const char *file_name)
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{
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long file_handle;
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size_t length;
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//assert(semihosting_connection_supported());
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file_handle = semihosting_file_open(file_name, FOPEN_MODE_RB);
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if (file_handle == -1)
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return file_handle;
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/* Find the length of the file */
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length = semihosting_file_length(file_handle);
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return semihosting_file_close(file_handle) ? -1 : length;
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}
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long semihosting_download_file(const char *file_name,
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size_t buf_size,
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uintptr_t buf)
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{
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long ret = -EINVAL;
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size_t length;
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long file_handle;
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/* Null pointer check */
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if (!buf)
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return ret;
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//assert(semihosting_connection_supported());
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file_handle = semihosting_file_open(file_name, FOPEN_MODE_RB);
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if (file_handle == -1)
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return ret;
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/* Find the actual length of the file */
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length = semihosting_file_length(file_handle);
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if (length == -1)
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goto semihosting_fail;
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/* Signal error if we do not have enough space for the file */
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if (length > buf_size)
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goto semihosting_fail;
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/*
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* A successful read will return 0 in which case we pass back
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* the actual number of bytes read. Else we pass a negative
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* value indicating an error.
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*/
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ret = semihosting_file_read(file_handle, &length, buf);
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if (ret)
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goto semihosting_fail;
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else
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ret = length;
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semihosting_fail:
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semihosting_file_close(file_handle);
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return ret;
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}
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@ -1,65 +0,0 @@
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#pragma once
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// Adapted from Arm TF
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/*
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* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#include <stdint.h>
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#include <stdio.h> /* For ssize_t */
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#define SEMIHOSTING_SYS_OPEN 0x01
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#define SEMIHOSTING_SYS_CLOSE 0x02
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#define SEMIHOSTING_SYS_WRITE0 0x04
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#define SEMIHOSTING_SYS_WRITEC 0x03
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#define SEMIHOSTING_SYS_WRITE 0x05
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#define SEMIHOSTING_SYS_READ 0x06
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#define SEMIHOSTING_SYS_READC 0x07
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#define SEMIHOSTING_SYS_SEEK 0x0A
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#define SEMIHOSTING_SYS_FLEN 0x0C
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#define SEMIHOSTING_SYS_REMOVE 0x0E
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#define SEMIHOSTING_SYS_SYSTEM 0x12
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#define SEMIHOSTING_SYS_ERRNO 0x13
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#define FOPEN_MODE_R 0x0
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#define FOPEN_MODE_RB 0x1
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#define FOPEN_MODE_RPLUS 0x2
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#define FOPEN_MODE_RPLUSB 0x3
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#define FOPEN_MODE_W 0x4
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#define FOPEN_MODE_WB 0x5
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#define FOPEN_MODE_WPLUS 0x6
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#define FOPEN_MODE_WPLUSB 0x7
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#define FOPEN_MODE_A 0x8
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#define FOPEN_MODE_AB 0x9
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#define FOPEN_MODE_APLUS 0xa
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#define FOPEN_MODE_APLUSB 0xb
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static inline long semihosting_connection_supported(void)
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{
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#ifdef PLATFORM_QEMU
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return 1;
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#else
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return 0;
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#endif
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}
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long semihosting_file_open(const char *file_name, size_t mode);
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long semihosting_file_seek(long file_handle, ssize_t offset);
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long semihosting_file_read(long file_handle, size_t *length, uintptr_t buffer);
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long semihosting_file_write(long file_handle,
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size_t *length,
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const uintptr_t buffer);
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long semihosting_file_close(long file_handle);
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long semihosting_file_length(long file_handle);
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long semihosting_system(char *command_line);
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long semihosting_get_flen(const char *file_name);
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long semihosting_download_file(const char *file_name,
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size_t buf_size,
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uintptr_t buf);
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void semihosting_write_char(char character);
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void semihosting_write_string(const char *string);
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char semihosting_read_char(void);
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201
thermosphere/src/util_semihosting.hpp
Normal file
201
thermosphere/src/util_semihosting.hpp
Normal file
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/*
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* Copyright (c) 2019-2020 Atmosphère-NX
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms and conditions of the GNU General Public License,
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* version 2, as published by the Free Software Foundation.
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*
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* This program is distributed in the hope it will be useful, but WITHOUT
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* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
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* FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for
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* more details.
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*
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* You should have received a copy of the GNU General Public License
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* along with this program. If not, see <http://www.gnu.org/licenses/>.
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*/
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/* Initially from Arm TF */
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/*
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* Copyright (c) 2013-2014, ARM Limited and Contributors. All rights reserved.
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*
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* SPDX-License-Identifier: BSD-3-Clause
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*/
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#pragma once
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#include "defines.hpp"
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#include <string_view>
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namespace ams::util {
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namespace impl {
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enum class SemihostingOperation : unsigned int {
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/* Only the operations we implement below are listed. */
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Open = 1,
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Close = 2,
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Write0 = 3,
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WriteC = 4,
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Write = 5,
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Read = 6,
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ReadC = 7,
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Seek = 0xA,
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FLen = 0xC,
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Remove = 0xE,
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System = 0x12,
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Errno = 0x13
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};
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ALWAYS_INLINE long SemihostingCall(impl::SemihostingOperation op, const void *blk)
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{
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register long ret asm("x0");
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register impl::SemihostingOperation arg1 asm("w0") = op;
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register const void *arg2 asm("x1") = blk;
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__asm__ __volatile__("hlt 0xF000" : "=r" (ret) : "0" (arg1), "r" (arg2) : "memory");
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return ret;
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}
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}
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class SemihostingFile {
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NON_COPYABLE(SemihostingFile);
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private:
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/* A call to open can't return a 0 handle */
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long m_handle = 0;
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public:
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enum class OpenMode : unsigned long {
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R = 0,
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RB = 1,
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RPlus = 2,
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RPlusB = 3,
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W = 4,
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WB = 5,
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WPlus = 6,
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WPlusB = 7,
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A = 8,
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AB = 9,
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APlus = 10,
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APlusB = 11
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};
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constexpr bool IsOpen() const { return m_handle > 0; }
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long Open(std::string_view name, OpenMode mode)
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{
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/* std::string_view is implicitely constructible from const char* */
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struct {
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const char *name;
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OpenMode mode;
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size_t nameSize;
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} blk = { name.data(), mode, name.size() };
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int ret = impl::SemihostingCall(impl::SemihostingOperation::Open, &blk);
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if (ret > 0) {
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m_handle = ret;
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return 0;
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} else {
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m_handle = 0;
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return -1;
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}
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}
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long Seek(ssize_t offset) const
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{
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struct {
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long handle;
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ssize_t offset;
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} blk = { m_handle, offset };
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return impl::SemihostingCall(impl::SemihostingOperation::Seek, &blk);
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}
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size_t Read(void *buf, size_t len) const
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{
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struct {
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long handle;
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void *buf;
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size_t len;
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} blk = { m_handle, buf, len };
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long nrem = impl::SemihostingCall(impl::SemihostingOperation::Read, &blk);
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return len - nrem;
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}
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size_t Write(const void *buf, size_t len) const
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{
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struct {
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long handle;
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const void *buf;
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size_t len;
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} blk = { m_handle, buf, len };
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long nrem = impl::SemihostingCall(impl::SemihostingOperation::Write, &blk);
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return len - nrem;
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}
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ssize_t GetSize() const
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{
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return impl::SemihostingCall(impl::SemihostingOperation::FLen, &m_handle);
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}
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long Close()
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{
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long ret = impl::SemihostingCall(impl::SemihostingOperation::Close, &m_handle);
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m_handle = 0;
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return ret;
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}
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public:
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constexpr SemihostingFile() = default;
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SemihostingFile(const char *name, OpenMode mode = OpenMode::RB)
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{
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Open(name, mode);
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}
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SemihostingFile(SemihostingFile &&) = default;
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SemihostingFile &operator=(SemihostingFile &&) = default;
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~SemihostingFile()
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{
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Close();
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}
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public:
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static ssize_t GetFileSize(const char *name)
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{
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SemihostingFile file{name};
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return file.IsOpen() ? file.GetSize() : -1;
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}
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static ssize_t DownloadFile(void *buf, const char *name, size_t maxLen)
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{
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SemihostingFile file{name};
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return file.IsOpen() ? file.Read(buf, maxLen) : -1;
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}
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};
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long SemihostingSystem(std::string_view cmdLine)
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{
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/* std::string_view is implicitely constructible from const char* */
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struct {
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const char *str;
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size_t len;
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} blk = { cmdLine.data(), cmdLine.size() };
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return impl::SemihostingCall(impl::SemihostingOperation::System, &blk);
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}
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void SemihostingWriteChar(char c)
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{
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impl::SemihostingCall(impl::SemihostingOperation::WriteC, &c);
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}
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void SemihostingWriteString(const char *str)
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{
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/* Has to be null-terminated, sadly. */
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impl::SemihostingCall(impl::SemihostingOperation::Write0, str);
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}
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char SemihostingReadChar(void)
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{
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return static_cast<char>(impl::SemihostingCall(impl::SemihostingOperation::ReadC, nullptr));
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}
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}
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