semihost.cpp File Reference

#include <cstdio>
#include "etiss/ETISS.h"
#include <iomanip>
#include "SemihostingCalls.h"
#include "etiss/jit/ReturnCode.h"
#include "libsemihost.h"

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Macros
#define	TICKER_FREQ   1000
#define	SYS_OPEN_MODES_TOTAL   12
#define	SYS_OPEN_MODES_IN_LIMIT   4
#define	SYS_OPEN_MODES_OUT_LIMIT   8
#define	PS_PER_CS   10000000000
#define	CHECK_NEGATIVE_RETURN(var)
#define	FIELD(fieldNo)   semihostReadStructField(etissSystem, XLEN / 8, parameter, fieldNo);

Functions
etiss_int64	semihostingCall (ETISS_CPU *const cpu, ETISS_System *const etissSystem, etiss_uint32 XLEN, etiss_uint64 operationNumber, etiss_uint64 parameter)
	Executes the semihosting call based on the operation number.
uint8_t	etiss_semihost_enabled ()
	Checks whether semihosting is enabled in the config.
int64_t	etiss_semihost (ETISS_CPU *const cpu, ETISS_System *const etissSystem, void *const *const _, uint32_t XLEN, uint64_t operation, uint64_t parameter)
	Executes the semihosting call based on the operation number.
etiss_uint64	semihostReadStructField (ETISS_System *etissSystem, etiss_uint32 numBytes, etiss_uint64 address, int fieldNo)
	Assumes there is an array of numBytes long integers at address.
std::vector< etiss_uint8 >	semihostReadSystemMemory (ETISS_System *etissSystem, etiss_uint64 address, etiss_uint64 length)
	helper for reading a std::vector of bytes by address and length from an etiss system
void	semihostWriteSystemMemory (ETISS_System *etissSystem, etiss_uint64 address, std::vector< etiss_uint8 > data)
	helper for writing a std::vector of bytes to an etiss system
std::string	semihostReadString (ETISS_System *etissSystem, etiss_uint64 address, etiss_uint64 length)
	helper for reading a std::string by address and length from an etiss system
void	semihostWriteString (ETISS_System *etissSystem, etiss_uint64 address, std::string str)
	helper for writing a std::string to an etiss system
bool	is_std_in_out_err (FILE *file)

Variables
const char *	SYS_OPEN_MODES_STRS [] = { "r", "rb", "r+", "r+b", "w", "wb", "w+", "w+b", "a", "ab", "a+", "a+b" }

Macro Definition Documentation

CHECK_NEGATIVE_RETURN

#define CHECK_NEGATIVE_RETURN

(

var

)

Value:

    if ((var) < 0)                 \
    {                              \
        semihostingErrno = errno;  \
        return -1;                 \
    }

Definition at line 31 of file semihost.cpp.

FIELD

#define FIELD

(

fieldNo

)

semihostReadStructField(etissSystem, XLEN / 8, parameter, fieldNo);

Definition at line 39 of file semihost.cpp.

PS_PER_CS

#define PS_PER_CS   10000000000

Definition at line 28 of file semihost.cpp.

SYS_OPEN_MODES_IN_LIMIT

#define SYS_OPEN_MODES_IN_LIMIT   4

Definition at line 25 of file semihost.cpp.

SYS_OPEN_MODES_OUT_LIMIT

#define SYS_OPEN_MODES_OUT_LIMIT   8

Definition at line 26 of file semihost.cpp.

SYS_OPEN_MODES_TOTAL

#define SYS_OPEN_MODES_TOTAL   12

Definition at line 24 of file semihost.cpp.

TICKER_FREQ

#define TICKER_FREQ   1000

Definition at line 20 of file semihost.cpp.

Function Documentation

etiss_semihost()

int64_t etiss_semihost	(	ETISS_CPU *const	cpu,
		ETISS_System *const	etissSystem,
		void *const *const	_,
		uint32_t	XLEN,
		uint64_t	operation,
		uint64_t	parameter
	)

Executes the semihosting call based on the operation number.

For description of all semihosting calls see: https://github.com/ARM-software/abi-aa/blob/main/semihosting/semihosting.rst

Definition at line 56 of file semihost.cpp.

References semihostingCall().

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etiss_semihost_enabled()

uint8_t etiss_semihost_enabled

(

)

Checks whether semihosting is enabled in the config.

Definition at line 51 of file semihost.cpp.

References etiss::cfg(), and etiss::Configuration::get().

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is_std_in_out_err()

bool is_std_in_out_err

(

FILE *

file

)

Definition at line 127 of file semihost.cpp.

Referenced by semihostingCall().

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semihostingCall()

etiss_int64 semihostingCall	(	ETISS_CPU *const	cpu,
		ETISS_System *const	etissSystem,
		etiss_uint32	XLEN,
		etiss_uint64	operationNumber,
		etiss_uint64	parameter
	)

Executes the semihosting call based on the operation number.

For description of all semihosting calls see: https://github.com/ARM-software/abi-aa/blob/main/semihosting/semihosting.rst

openFiles maps target file descriptors (uint) to host file descriptors (FILE *).

next target file descriptor to be allocated. starts at 0 for first target fd (stdin)

Local errno variable to set in semihosting functions and return using SYS_ERRNO

Definition at line 132 of file semihost.cpp.

References c, CHECK_NEGATIVE_RETURN, ETISS_CPU::cpuTime_ps, ETISS_CPU::exception, FIELD, etiss::INFO, is_std_in_out_err(), length(), etiss::log(), PS_PER_CS, ETISS_CPU::return_pending, semihostReadString(), semihostReadStructField(), semihostReadSystemMemory(), semihostWriteString(), semihostWriteSystemMemory(), SYS_CLOCK, SYS_CLOSE, SYS_ELAPSED, SYS_ERRNO, SYS_EXIT, SYS_EXIT_EXTENDED, SYS_FLEN, SYS_GET_CMDLINE, SYS_HEAPINFO, SYS_ISERROR, SYS_ISTTY, SYS_OPEN, SYS_OPEN_MODES_IN_LIMIT, SYS_OPEN_MODES_OUT_LIMIT, SYS_OPEN_MODES_STRS, SYS_OPEN_MODES_TOTAL, SYS_READ, SYS_READC, SYS_REMOVE, SYS_RENAME, SYS_SEEK, SYS_SYSTEM, SYS_TICKFREQ, SYS_TIME, SYS_TMPNAM, SYS_WRITE, SYS_WRITE0, SYS_WRITEC, TICKER_FREQ, etiss::VERBOSE, and etiss::WARNING.

Referenced by etiss_semihost().

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semihostReadString()

std::string semihostReadString	(	ETISS_System *	etissSystem,
		etiss_uint64	address,
		etiss_uint64	length
	)

helper for reading a std::string by address and length from an etiss system

Definition at line 114 of file semihost.cpp.

References length(), and semihostReadSystemMemory().

Referenced by semihostingCall().

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semihostReadStructField()

etiss_uint64 semihostReadStructField	(	ETISS_System *	etissSystem,
		etiss_uint32	numBytes,
		etiss_uint64	address,
		int	fieldNo
	)

Assumes there is an array of numBytes long integers at address.

Reads the filedNo-th field of this array an returns it as a uint64 (0-indexed)

Definition at line 66 of file semihost.cpp.

References ETISS_System::dbg_read, etiss::ERROR, ETISS_System::handle, and etiss::log().

Referenced by semihostingCall().

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semihostReadSystemMemory()

std::vector< etiss_uint8 > semihostReadSystemMemory	(	ETISS_System *	etissSystem,
		etiss_uint64	address,
		etiss_uint64	length
	)

helper for reading a std::vector of bytes by address and length from an etiss system

Definition at line 99 of file semihost.cpp.

References ETISS_System::dbg_read, ETISS_System::handle, and length().

Referenced by semihostingCall(), and semihostReadString().

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semihostWriteString()

void semihostWriteString	(	ETISS_System *	etissSystem,
		etiss_uint64	address,
		std::string	str
	)

helper for writing a std::string to an etiss system

Definition at line 122 of file semihost.cpp.

References ETISS_System::dbg_write, and ETISS_System::handle.

Referenced by semihostingCall().

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semihostWriteSystemMemory()

void semihostWriteSystemMemory	(	ETISS_System *	etissSystem,
		etiss_uint64	address,
		std::vector< etiss_uint8 >	data
	)

helper for writing a std::vector of bytes to an etiss system

Definition at line 108 of file semihost.cpp.

References ETISS_System::dbg_write, and ETISS_System::handle.

Referenced by semihostingCall().

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Variable Documentation

SYS_OPEN_MODES_STRS

const char* SYS_OPEN_MODES_STRS[] = { "r", "rb", "r+", "r+b", "w", "wb", "w+", "w+b", "a", "ab", "a+", "a+b" }

Definition at line 23 of file semihost.cpp.

Referenced by semihostingCall().