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rvos.cxx
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rvos.cxx
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/*
This emulates an extemely simple RISC-V OS.
Per https://riscv.org/wp-content/uploads/2017/05/riscv-privileged-v1.10.pdf
It's an AEE (Application Execution Environment) that exposes an ABI (Application Binary Inferface) for an Application.
It runs in RISC-V M mode, similar to embedded systems.
It can load and execute 64-bit RISC-V apps built with Gnu tools in .elf files targeting Linux.
Written by David Lee in February 2023
Useful: https://github.com/jart/cosmopolitan/blob/1.0/libc/sysv/consts.sh
*/
#include <stdint.h>
#include <stdio.h>
#include <string.h>
#include <assert.h>
#include <sys/stat.h>
#include <fcntl.h>
#include <ctype.h>
#include <errno.h>
#include <vector>
#include <chrono>
#include <locale.h>
#include <djl_os.hxx>
#ifdef _WIN32
#include <io.h>
struct iovec
{
void * iov_base; /* Starting address */
size_t iov_len; /* Length in bytes */
};
typedef SSIZE_T ssize_t;
#define local_KERNEL_NCCS 19
struct local_kernel_termios
{
uint32_t c_iflag; /* input mode flags */
uint32_t c_oflag; /* output mode flags */
uint32_t c_cflag; /* control mode flags */
uint32_t c_lflag; /* local mode flags */
uint8_t c_line; /* line discipline */
uint8_t c_cc[local_KERNEL_NCCS]; /* control characters */
};
#else
#include <unistd.h>
#ifndef OLDGCC // the several-years-old Gnu C compiler for the RISC-V development boards
#include <termios.h>
#include <sys/random.h>
#include <sys/uio.h>
#include <dirent.h>
#ifndef __APPLE__
#include <sys/sysinfo.h>
#endif
// this structure is smaller than the usermode version. I don't know of a cross-platform header with it.
#define local_KERNEL_NCCS 19
struct local_kernel_termios
{
tcflag_t c_iflag; /* input mode flags */
tcflag_t c_oflag; /* output mode flags */
tcflag_t c_cflag; /* control mode flags */
tcflag_t c_lflag; /* local mode flags */
cc_t c_line; /* line discipline */
cc_t c_cc[local_KERNEL_NCCS]; /* control characters */
};
#endif
struct LINUX_FIND_DATA
{
char cFileName[ MAX_PATH ];
};
#endif
#include <djltrace.hxx>
#include <djl_con.hxx>
#include <djl_mmap.hxx>
using namespace std;
using namespace std::chrono;
#include "riscv.hxx"
#include "rvos.h"
CDJLTrace tracer;
ConsoleConfiguration g_consoleConfig;
bool g_compressed_rvc = false; // is the app compressed risc-v?
const uint64_t g_args_commit = 1024; // storage spot for command-line arguments and environment variables
const uint64_t g_stack_commit = 128 * 1024; // RAM to allocate for the fixed stack
uint64_t g_brk_commit = 10 * 1024 * 1024; // RAM to reserve if the app calls brk to allocate space. 10 meg default
uint64_t g_mmap_commit = 10 * 1024 * 1024; // RAM to reserve if the app mmap to allocate space. 10 meg default
bool g_terminate = false; // has the app asked to shut down?
int g_exit_code = 0; // exit code of the app in the vm
vector<uint8_t> memory; // RAM for the vm
uint64_t g_base_address = 0; // vm address of start of memory
uint64_t g_execution_address = 0; // where the program counter starts
uint64_t g_brk_offset = 0; // offset of brk, initially g_end_of_data
uint64_t g_mmap_offset = 0; // offset of where mmap allocations start
uint64_t g_highwater_brk = 0; // highest brk seen during app; peak dynamically-allocated RAM
uint64_t g_end_of_data = 0; // official end of the loaded app
uint64_t g_bottom_of_stack = 0; // just beyond where brk might move
uint64_t g_top_of_stack = 0; // argc, argv, penv, aux records sit above this
bool * g_ptracenow = 0; // if this variable exists in the vm, it'll control instruction tracing
CMMap g_mmap; // for mmap and munmap system calls
// fake descriptors.
// /etc/timezone is not implemented, so apps running in RVOS on Windows assume UTC
const uint64_t findFirstDescriptor = 3000;
const uint64_t timebaseFrequencyDescriptor = 3001;
#pragma warning(disable: 4200) // 0-sized array
struct linux_dirent64_syscall {
uint64_t d_ino; /* Inode number */
uint64_t d_off; /* Offset to next linux_dirent */
uint16_t d_reclen; /* Length of this linux_dirent */
uint8_t d_type; /* DT_DIR (4) if a dir, DT_REG (8) if a regular file */
char d_name[];
/* optional and not implemented. must be 0-filled
char pad
char d_type
*/
};
struct pollfd_syscall {
int fd;
short events;
short revents;
};
struct timespec_syscall {
uint64_t tv_sec;
uint64_t tv_nsec;
};
struct stat_linux_syscall {
/*
struct stat info run on a 64-bit RISC-V system
sizeof s: 128
offset size field
0 8 st_dev
8 8 st_ino
16 4 st_mode
20 4 st_nlink
24 4 st_uid
28 4 st_gid
32 8 st_rdev
48 8 st_size
56 4 st_blksize
64 8 st_blocks
72 16 st_atim
88 16 st_mtim
104 16 st_ctim
*/
uint64_t st_dev; /* ID of device containing file */
uint64_t st_ino; /* Inode number */
uint32_t st_mode; /* File type and mode */
uint32_t st_nlink; /* Number of hard links */
uint32_t st_uid; /* User ID of owner */
uint32_t st_gid; /* Group ID of owner */
uint64_t st_rdev; /* Device ID (if special file) */
uint64_t st_mystery_spot;
uint64_t st_size; /* Total size, in bytes */
uint32_t st_blksize; /* Block size for filesystem I/O */
uint64_t st_blocks; /* Number of 512 B blocks allocated */
/* Since POSIX.1-2008, this structure supports nanosecond
precision for the following timestamp fields.
For the details before POSIX.1-2008, see VERSIONS. */
struct timespec st_atim; /* Time of last access */
struct timespec st_mtim; /* Time of last modification */
struct timespec st_ctim; /* Time of last status change */
#ifndef st_atime
#ifndef OLDGCC
#define st_atime st_atim.tv_sec /* Backward compatibility */
#define st_mtine st_mtim.tv_sec
#define st_ctime st_ctim.tv_sec
#endif
#endif
uint64_t st_mystery_spot_2;
};
#pragma pack( push, 1 )
struct AuxProcessStart
{
uint64_t a_type; // AT_xxx ID from elf.h
union
{
uint64_t a_val;
void * a_ptr;
void ( * a_fcn )();
} a_un;
};
struct ElfHeader64
{
uint32_t magic;
uint8_t bit_width;
uint8_t endianness;
uint8_t elf_version;
uint8_t os_abi;
uint8_t os_avi_version;
uint8_t padding[ 7 ];
uint16_t type;
uint16_t machine;
uint32_t version;
uint64_t entry_point;
uint64_t program_header_table;
uint64_t section_header_table;
uint32_t flags;
uint16_t header_size;
uint16_t program_header_table_size;
uint16_t program_header_table_entries;
uint16_t section_header_table_size;
uint16_t section_header_table_entries;
uint16_t section_with_section_names;
};
struct ElfSymbol64
{
uint32_t name; // index into the symbol string table
uint8_t info; // value of the symbol
uint8_t other;
uint16_t shndx;
uint64_t value; // address where the symbol resides in memory
uint64_t size; // length in memory of the symbol
const char * show_info()
{
if ( 0 == info )
return "local";
if ( 1 == info )
return "global";
if ( 2 == info )
return "weak";
if ( 3 == info )
return "num";
if ( 4 == info )
return "file";
if ( 5 == info )
return "common";
if ( 6 == info )
return "tls";
if ( 7 == info )
return "num";
if ( 10 == info )
return "loos / gnu_ifunc";
if ( 12 == info )
return "hios";
if ( 13 == info )
return "loproc";
if ( 15 == info )
return "hiproc";
return "unknown";
} //show_info
const char * show_other()
{
if ( 0 == other )
return "default";
if ( 1 == other )
return "internal";
if ( 2 == other )
return "hidden";
if ( 3 == other )
return "protected";
return "unknown";
}
};
struct ElfProgramHeader64
{
uint32_t type;
uint32_t flags;
uint64_t offset_in_image;
uint64_t virtual_address;
uint64_t physical_address;
uint64_t file_size;
uint64_t memory_size;
uint64_t alignment;
const char * show_type()
{
uint32_t basetype = ( type & 0xf );
if ( 0 == basetype )
return "unused";
if ( 1 == basetype )
return "load";
if ( 2 == basetype )
return "dynamic";
if ( 3 == basetype )
return "interp";
if ( 4 == basetype )
return "note";
if ( 5 == basetype )
return "shlib";
if ( 6 == basetype )
return "phdr";
if ( 7 == basetype )
return "tls";
if ( 8 == basetype )
return "num";
return "unknown";
}
};
struct ElfSectionHeader64
{
uint32_t name_offset;
uint32_t type;
uint64_t flags;
uint64_t address;
uint64_t offset;
uint64_t size;
uint32_t link;
uint32_t info;
uint64_t address_alignment;
uint64_t entry_size;
const char * show_type()
{
uint32_t basetype = ( type & 0xf );
if ( 0 == basetype )
return "unused";
if ( 1 == basetype )
return "program data";
if ( 2 == basetype )
return "symbol table";
if ( 3 == basetype )
return "string table";
if ( 4 == basetype )
return "relocation entries with addends";
if ( 5 == basetype )
return "symbol hash table";
if ( 6 == basetype )
return "dynamic";
if ( 7 == basetype )
return "note";
if ( 8 == basetype )
return "nobits";
if ( 9 == basetype )
return "relocation entries without addends";
if ( 10 == basetype )
return "shlib";
if ( 11 == basetype )
return "dynsym";
if ( 12 == basetype )
return "num";
if ( 14 == basetype )
return "initialization functions";
if ( 15 == basetype )
return "termination functions";
return "unknown";
}
const char * show_flags()
{
static char ac[ 80 ];
ac[0] = 0;
if ( flags & 0x1 )
strcat( ac, "write, " );
if ( flags & 0x2 )
strcat( ac, "alloc, " );
if ( flags & 0x4 )
strcat( ac, "executable, " );
if ( flags & 0x10 )
strcat( ac, "merge, " );
if ( flags & 0x20 )
strcat( ac, "asciz strings, " );
return ac;
}
};
#pragma pack(pop)
void usage( char const * perror = 0 )
{
g_consoleConfig.RestoreConsole( false );
if ( 0 != perror )
printf( "error: %s\n", perror );
printf( "usage: rvos <elf_executable>\n" );
printf( " arguments: -e just show information about the elf executable; don't actually run it\n" );
printf( " -g (internal) generate rcvtable.txt then exit\n" );
printf( " -h:X # of meg for the heap (brk space). 0..1024 are valid. default is 10\n" );
printf( " -i if -t is set, also enables risc-v instruction tracing\n" );
printf( " -m:X # of meg for mmap space. 0..1024 are valid. default is 10\n" );
printf( " -p shows performance information at app exit\n" );
printf( " -t enable debug tracing to rvos.log\n" );
printf( " -v used with -e shows verbose information (e.g. symbols)\n" );
printf( " %s\n", build_string() );
exit( 1 );
} //usage
struct linux_timeval
{
uint64_t tv_sec; // time_t
uint64_t tv_usec; // suseconds_t
};
int gettimeofday( linux_timeval * tp )
{
// the OLDGCC's chrono implementation is built on time(), which calls this but
// has only second resolution. So the microseconds returned here are lost.
// All other C++ implementations do the right thing.
namespace sc = std::chrono;
sc::system_clock::duration d = sc::system_clock::now().time_since_epoch();
sc::seconds s = sc::duration_cast<sc::seconds>( d );
tp->tv_sec = s.count();
tp->tv_usec = sc::duration_cast<sc::microseconds>( d - s ).count();
return 0;
} //gettimeofday
uint64_t rand64()
{
uint64_t r = 0;
for ( int i = 0; i < 7; i++ )
r = ( r << 15 ) | ( rand() & 0x7FFF );
return r;
} //rand64
void backslash_to_slash( char * p )
{
while ( *p )
{
if ( '\\' == *p )
*p = '/';
p++;
}
} //backslash_to_slash
#ifdef _WIN32
void slash_to_backslash( char * p )
{
while ( *p )
{
if ( '/' == *p )
*p = '\\';
p++;
}
} //slash_to_backslash
int windows_translate_flags( int flags )
{
// Translate open() flags from Linux to Windows
// Microsoft C uses different constants for flags than linux:
// msft (win+dos) linux
// -------------- -----
// 0 O_RDONLY O_RDONLY
// 1 O_WRONLY O_WRONLY
// 2 O_RDRW O_RDWR
// 0x8 O_APPEND n/a
// 0x10 O_RANDOM _FMARK / O_SHLOCK / _FSHLOCK / O_SYNC
// 0x20 O_SEQUENTIAL _FDEFER / O_EXLOCK / _FEXLOCK
// 0x40 O_TEMPORARY O_CREAT
// 0x80 O_NOINHERIT O_EXCL
// 0x100 O_CREAT n/a
// 0x200 O_TRUNC O_TRUNC
// 0x400 O_EXCL O_APPEND
// 0x2000 O_OBTAINDIR O_ASYNC
// 0x4000 O_TEXT n/a
// 0x8000 O_BINARY n/a
// 0x10100 n/a O_FSYNC, O_SYNC
int f = flags & 3; // copy rd/wr/rdrw
f |= O_BINARY; // this is assumed on Linux systems
if ( 0x40 & flags )
f |= O_CREAT;
if ( 0x80 & flags )
f |= O_EXCL;
if ( 0x200 & flags )
f |= O_TRUNC;
if ( 0x400 & flags )
f |= O_APPEND;
tracer.Trace( " flags translated from linux %x to Microsoft %x\n", flags, f );
return f;
} //windows_translate_flags
uint32_t epoch_days( uint16_t y, uint16_t m, uint16_t d ) // taken from https://blog.reverberate.org/2020/05/12/optimizing-date-algorithms.html
{
const uint32_t year_base = 4800; /* Before min year, multiple of 400. */
const uint32_t m_adj = m - 3; /* March-based month. */
const uint32_t carry = m_adj > m ? 1 : 0;
const uint32_t adjust = carry ? 12 : 0;
const uint32_t y_adj = y + year_base - carry;
const uint32_t month_days = ((m_adj + adjust) * 62719 + 769) / 2048;
const uint32_t leap_days = y_adj / 4 - y_adj / 100 + y_adj / 400;
return y_adj * 365 + leap_days + month_days + (d - 1) - 2472632;
} //epoch_days
uint64_t SystemTime_to_esecs( SYSTEMTIME & st )
{
// takes a Windows system time and returns linux epoch seconds
uint32_t edays = epoch_days( st. wYear, st.wMonth, st.wDay );
uint32_t secs = ( st.wHour * 3600 ) + ( st.wMinute * 60 ) + st.wSecond;
return ( edays * 24 * 3600 ) + secs;
} //SystemTime_to_esecs
int fill_pstat_windows( int descriptor, struct stat_linux_syscall * pstat, const char * path )
{
char ac[ MAX_PATH ];
if ( 0 != path )
{
strcpy( ac, path );
slash_to_backslash( ac );
}
else
ac[ 0 ] = 0;
memset( pstat, 0, sizeof( struct stat_linux_syscall ) );
// default values, most of which are lies
pstat->st_ino = 3;
pstat->st_nlink = 1;
pstat->st_uid = 1000;
pstat->st_gid = 5;
pstat->st_rdev = 1024; // this is st_blksize on linux
pstat->st_size = 0;
if ( descriptor >= 0 && descriptor <= 2 ) // stdin / stdout / stderr
{
if ( isatty( descriptor ) )
pstat->st_mode = S_IFCHR;
else
{
pstat->st_mode = S_IFREG;
pstat->st_rdev = 4096; // this is st_blksize on linux
}
}
else if ( findFirstDescriptor == descriptor )
{
pstat->st_mode = S_IFDIR;
pstat->st_rdev = 4096; // this is st_blksize on linux
}
else if ( timebaseFrequencyDescriptor == descriptor )
{
pstat->st_mode = S_IFREG;
pstat->st_rdev = 4096; // this is st_blksize on linux
}
else
{
WIN32_FILE_ATTRIBUTE_DATA data = {0};
BOOL ok = FALSE;
if ( ac[ 0 ] )
{
ok = GetFileAttributesExA( ac, GetFileExInfoStandard, & data );
tracer.Trace( " result of GetFileAttributesEx on '%s': %d\n", ac, ok );
}
if ( !ok && ( descriptor < 0 ) )
{
errno = 2; // not found;
return -1;
}
if ( ok )
{
if ( data.dwFileAttributes & FILE_ATTRIBUTE_DIRECTORY )
pstat->st_mode = S_IFDIR;
else
pstat->st_mode = S_IFREG;
// in spirit: st_mtim = data.ftLastWriteTime;
SYSTEMTIME st = {0};
FileTimeToSystemTime( &data.ftLastWriteTime, &st );
pstat->st_mtim.tv_sec = SystemTime_to_esecs( st );
}
pstat->st_rdev = 4096; // this is st_blksize on linux
if ( !ok && ( descriptor > 0 ) )
{
struct _stat statbuf;
int result = _fstat( descriptor, &statbuf );
if ( 0 == result )
{
pstat->st_mtim.tv_sec = statbuf.st_mtime;
data.nFileSizeLow = statbuf.st_size;
}
else
return -1;
}
pstat->st_size = data.nFileSizeLow;
}
return 0;
} //fill_pstat_windows
// taken from gnu's time.h.
#define CLOCK_REALTIME 0
#define CLOCK_MONOTONIC 1
#define CLOCK_PROCESS_CPUTIME_ID 2
#define CLOCK_THREAD_CPUTIME_ID 3
#define CLOCK_MONOTONIC_RAW 4
#ifndef CLOCK_REALTIME_COARSE // mingw64's pthread_time.h defines this as 4 because standards
#define CLOCK_REALTIME_COARSE 5
#endif
#define CLOCK_MONOTONIC_COARSE 6
static const char * clockids[] =
{
"realtime",
"monotonic",
"process_cputime_id",
"thread_cputime_id",
"monotonic_raw",
"realtime_coarse",
"monotonic_coarse",
};
typedef int clockid_t;
const char * get_clockid( clockid_t clockid )
{
if ( clockid < _countof( clockids ) )
return clockids[ clockid ];
return "unknown";
} //get_clockid
high_resolution_clock::time_point g_tAppStart;
int msc_clock_gettime( clockid_t clockid, struct timespec_syscall * tv )
{
tracer.Trace( " msc_clock_gettime, clockid %d == %s\n", clockid, get_clockid( clockid ) );
uint64_t diff = 0;
if ( CLOCK_REALTIME == clockid || CLOCK_REALTIME_COARSE == clockid )
{
system_clock::duration d = system_clock::now().time_since_epoch();
diff = duration_cast<nanoseconds>( d ).count();
}
else if ( CLOCK_MONOTONIC == clockid || CLOCK_MONOTONIC_COARSE == clockid || CLOCK_MONOTONIC_RAW == clockid ||
CLOCK_PROCESS_CPUTIME_ID == clockid || CLOCK_THREAD_CPUTIME_ID == clockid )
{
high_resolution_clock::time_point tNow = high_resolution_clock::now();
diff = duration_cast<std::chrono::nanoseconds>( tNow - g_tAppStart ).count();
}
tv->tv_sec = diff / 1000000000ULL;
tv->tv_nsec = diff % 1000000000ULL;
return 0;
} //msc_clock_gettime
#endif
#ifdef __APPLE__
// For each of these flag fields o/i/l/c this code translates the subset of the values actually used in the apps
// I validated. There are certainly other cases that are still broken (though many aren't implemented in MacOS,
// so translating them wouldn't have any impact). If anyone understands the historical reasons for the differences
// in these flags I'd love to hear about it. Why did coders knowngly pick different constant values?
tcflag_t map_termios_oflag_linux_to_macos( tcflag_t f )
{
tcflag_t r = 0;
if ( f & 1 ) // OPOST is the same bit
r |= 1;
if ( f & 4 ) // ONLCR
r |= 2;
if ( f & 8 ) // OCRNL
r |= 0x10;
if ( f & 0x10 ) // ONOCR
r |= 0x20;
if ( f & 0x20 ) // ONLRET
r |= 0x40;
return r;
} //map_termios_oflag_linux_to_macos
tcflag_t map_termios_oflag_macos_to_linux( tcflag_t f )
{
tcflag_t r = 0;
if ( f & 1 ) // OPOST is the same bit for both
r |= 1;
if ( f & 2 ) // ONLCR
r |= 4;
if ( f & 0x10 ) // OCRNL
r |= 8;
if ( f & 0x20 ) // ONOCR
r |= 0x10;
if ( f & 0x40 ) // ONLRET
r |= 0x20;
return r;
} //map_termios_oflag_linux_to_macos
tcflag_t map_termios_iflag_linux_to_macos( tcflag_t f )
{
tcflag_t r = f;
if ( f & 0x400 ) // IXON
{
r &= ~ 0x400;
r |= 0x200;
}
else if ( f & 0x1000 ) // IXOFF
{
r &= ~ 0x1000;
r |= 0x400;
}
return r;
} //map_termios_oflag_linux_to_macos
tcflag_t map_termios_iflag_macos_to_linux( tcflag_t f )
{
tcflag_t r = f;
if ( f & 0x200 ) // IXON
{
r &= ~ 0x200;
r |= 0x400;
}
else if ( f & 0x400 ) // IXOFF
{
r &= ~ 0x400;
r |= 0x1000;
}
return r;
} //map_termios_oflag_linux_to_macos
tcflag_t map_termios_lflag_linux_to_macos( tcflag_t f )
{
tcflag_t r = 0;
if ( f & 1 ) // ICANON
r |= 0x80;
if ( f & 2 ) // ECHONL
r |= 0x100;
if ( f & 8 ) // ECHOK
r |= 8;
if ( f & 0x10 ) // ECHOKE
r |= 2;
if ( f & 0x20 ) // ECHOE
r |= 4;
if ( f & 0x40 ) // ECHO
r |= 0x10;
if ( f & 0x100 ) // EXTPROC
r |= 0x400000;
if ( f & 0x200 ) // ECHOPRT
r |= 0x40;
if ( f & 0x400 ) // ECONL
r |= 0x20;
if ( f & 0x8000 ) // ISIG
r |= 0x400;
if ( f & 0x10000 ) // IEXTEN
r |= 0x800;
return r;
} //map_termios_lflag_linux_to_macos
tcflag_t map_termios_lflag_macos_to_linux( tcflag_t f )
{
tcflag_t r = 0;
if ( f & 0x80 ) // ICANON
r |= 1;
if ( f & 0x100 ) // ECHONL
r |= 2;
if ( f & 8 ) // ECHOK
r |= 8;
if ( f & 2 ) // ECHOKE
r |= 0x10;
if ( f & 4 ) // ECHOE
r |= 0x20;
if ( f & 0x10 ) // ECHO
r |= 0x40;
if ( f & 0x400000 ) // EXTPROC
r |= 0x100;
if ( f & 0x40 ) // ECHOPRT
r |= 0x200;
if ( f & 0x20 ) // ECONL
r |= 0x400;
if ( f & 0x400 ) // ISIG
r |= 0x8000;
if ( f & 0x800 ) // IEXTEN
r |= 0x10000;
return r;
} //map_termios_lflag_linux_to_macos
tcflag_t map_termios_cflag_linux_to_macos( tcflag_t f )
{
tcflag_t r = 0;
if ( f & 0x10 ) // CS5
r |= 0x100;
if ( f & 0x20 ) // CS6 CLOCAL is also 0x20 on linux and 0x400 on MacOS
r |= 0x200;
if ( f & 0x30 ) // CS7
r |= 0x300;
if ( f & 0x40 ) // CSIZE
r |= 0x400;
if ( f & 0x80 ) // CSTOPB
r |= 0x800;
if ( f & 0x100 ) // CREAD
r |= 0x1000;
if ( f & 0x200 ) // PARENB
r |= 0x2000;
if ( f & 0x400 ) // CS8
r |= 0x4000;
if ( f & 0x800 ) // HUPCL
r |= 0x8000;
return r;
} //map_termios_cflag_linux_to_macos
tcflag_t map_termios_cflag_macos_to_linux( tcflag_t f )
{
tcflag_t r = 0;
if ( f & 0x100 ) // CS5
r |= 0x10;
if ( f & 0x200 ) // CS6 CLOCAL is also 0x20 on linux and 0x400 on MacOS
r |= 0x20;
if ( f & 0x300 ) // CS7
r |= 0x30;
if ( f & 0x400 ) // CSIZE
r |= 0x40;
if ( f & 0x800 ) // CSTOPB
r |= 0x80;
if ( f & 0x1000 ) // CREAD
r |= 0x100;
if ( f & 0x2000 ) // PARENB
r |= 0x200;
if ( f & 0x4000 ) // CS8
r |= 0x400;
if ( f & 0x8000 ) // HUPCL
r |= 0x800;
return r;
} //map_termios_cflag_linux_to_macos
#endif
#if defined(__ARM_32BIT_STATE) || defined(__ARM_64BIT_STATE)
int linux_riscv64_to_arm_open_flags( int flags )
{
// values are the same aside from these, which are flipped:
// riscv64 arm32 and arm64
// O_DIRECT 0x4000 0x10000
// O_DIRECTORY 0x10000 0x4000
int r = flags;
if ( flags & 0x4000 )
{
r &= ~0x4000;
r |= 0x10000;
}
if ( flags & 0x10000 )
{
r &= ~0x10000;
r |= 0x4000;
}
return r;
} //linux_risc64v_to_arm_open_flags
#endif
struct SysCall
{
const char * name;
uint64_t id;
};
static const SysCall syscalls[] =
{
{ "SYS_getcwd", SYS_getcwd },
{ "SYS_ioctl", SYS_ioctl },
{ "SYS_mkdirat", SYS_mkdirat },
{ "SYS_unlinkat", SYS_unlinkat },
{ "SYS_chdir", SYS_chdir },
{ "SYS_openat", SYS_openat },
{ "SYS_close", SYS_close },
{ "SYS_getdents64", SYS_getdents64 },
{ "SYS_lseek", SYS_lseek },
{ "SYS_read", SYS_read },
{ "SYS_write", SYS_write },
{ "SYS_writev", SYS_writev },
{ "SYS_pselect6", SYS_pselect6 },
{ "SYS_ppoll_time32", SYS_ppoll_time32 },
{ "SYS_readlinkat", SYS_readlinkat },
{ "SYS_newfstatat", SYS_newfstatat },
{ "SYS_newfstat", SYS_newfstat },
{ "SYS_fdatasync", SYS_fdatasync },
{ "SYS_exit", SYS_exit },
{ "SYS_exit_group", SYS_exit_group },
{ "SYS_set_tid_address", SYS_set_tid_address },
{ "SYS_futex", SYS_futex },
{ "SYS_set_robust_list", SYS_set_robust_list },
{ "SYS_clock_gettime", SYS_clock_gettime },
{ "SYS_clock_nanosleep", SYS_clock_nanosleep },
{ "SYS_sched_setaffinity", SYS_sched_setaffinity },
{ "SYS_sched_getaffinity", SYS_sched_getaffinity },
{ "SYS_sched_yield", SYS_sched_yield },
{ "SYS_tgkill", SYS_tgkill },
{ "SYS_signalstack", SYS_signalstack },
{ "SYS_sigaction", SYS_sigaction },
{ "SYS_rt_sigprocmask", SYS_rt_sigprocmask },
{ "SYS_prctl", SYS_prctl },
{ "SYS_gettimeofday", SYS_gettimeofday },
{ "SYS_getpid", SYS_getpid },
{ "SYS_gettid", SYS_gettid },
{ "SYS_sysinfo", SYS_sysinfo },
{ "SYS_brk", SYS_brk },
{ "SYS_munmap", SYS_munmap },
{ "SYS_mremap", SYS_mremap },
{ "SYS_clone", SYS_clone },
{ "SYS_mmap", SYS_mmap },
{ "SYS_mprotect", SYS_mprotect },
{ "SYS_riscv_flush_icache", SYS_riscv_flush_icache },
{ "SYS_prlimit64", SYS_prlimit64 },
{ "SYS_renameat2", SYS_renameat2 },
{ "SYS_getrandom", SYS_getrandom },
{ "SYS_open", SYS_open }, // only called for older systems
{ "SYS_unlink", SYS_unlink }, // only called for older systems
{ "rvos_sys_rand", rvos_sys_rand },
{ "rvos_sys_print_double", rvos_sys_print_double },
{ "rvos_sys_trace_instructions", rvos_sys_trace_instructions },
{ "rvos_sys_exit", rvos_sys_exit },
{ "rvos_sys_print_text", rvos_sys_print_text },
{ "rvos_sys_get_datetime", rvos_sys_get_datetime },
};
int syscall_find_compare( const void * a, const void * b )