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Sweden-Number/tools/winebuild/utils.c

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/*
* Small utility functions for winebuild
*
* Copyright 2000 Alexandre Julliard
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include "config.h"
#include "wine/port.h"
#include <assert.h>
#include <ctype.h>
#include <stdarg.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
# include <unistd.h>
#endif
#ifdef HAVE_SYS_STAT_H
# include <sys/stat.h>
#endif
#ifdef HAVE_SYS_MMAN_H
#include <sys/mman.h>
#endif
#include "build.h"
#if defined(_WIN32) && !defined(__CYGWIN__)
# define PATH_SEPARATOR ';'
#else
# define PATH_SEPARATOR ':'
#endif
static struct strarray tmp_files;
static struct strarray empty_strarray;
static const struct
{
const char *name;
enum target_cpu cpu;
} cpu_names[] =
{
{ "i386", CPU_x86 },
{ "i486", CPU_x86 },
{ "i586", CPU_x86 },
{ "i686", CPU_x86 },
{ "i786", CPU_x86 },
{ "amd64", CPU_x86_64 },
{ "x86_64", CPU_x86_64 },
{ "powerpc", CPU_POWERPC },
{ "arm", CPU_ARM },
{ "armv5", CPU_ARM },
{ "armv6", CPU_ARM },
{ "armv7", CPU_ARM },
{ "arm64", CPU_ARM64 },
{ "aarch64", CPU_ARM64 },
};
/* atexit handler to clean tmp files */
void cleanup_tmp_files(void)
{
unsigned int i;
for (i = 0; i < tmp_files.count; i++) if (tmp_files.str[i]) unlink( tmp_files.str[i] );
}
void *xmalloc (size_t size)
{
void *res;
res = malloc (size ? size : 1);
if (res == NULL)
{
fprintf (stderr, "Virtual memory exhausted.\n");
exit (1);
}
return res;
}
void *xrealloc (void *ptr, size_t size)
{
void *res = realloc (ptr, size);
if (size && res == NULL)
{
fprintf (stderr, "Virtual memory exhausted.\n");
exit (1);
}
return res;
}
char *xstrdup( const char *str )
{
char *res = strdup( str );
if (!res)
{
fprintf (stderr, "Virtual memory exhausted.\n");
exit (1);
}
return res;
}
char *strupper(char *s)
{
char *p;
for (p = s; *p; p++) *p = toupper(*p);
return s;
}
int strendswith(const char* str, const char* end)
{
int l = strlen(str);
int m = strlen(end);
return l >= m && strcmp(str + l - m, end) == 0;
}
char *strmake( const char* fmt, ... )
{
int n;
size_t size = 100;
va_list ap;
for (;;)
{
char *p = xmalloc( size );
va_start( ap, fmt );
n = vsnprintf( p, size, fmt, ap );
va_end( ap );
if (n == -1) size *= 2;
else if ((size_t)n >= size) size = n + 1;
else return p;
free( p );
}
}
static struct strarray strarray_copy( struct strarray src )
{
struct strarray array;
array.count = src.count;
array.max = src.max;
array.str = xmalloc( array.max * sizeof(*array.str) );
memcpy( array.str, src.str, array.count * sizeof(*array.str) );
return array;
}
static void strarray_add_one( struct strarray *array, const char *str )
{
if (array->count == array->max)
{
array->max *= 2;
if (array->max < 16) array->max = 16;
array->str = xrealloc( array->str, array->max * sizeof(*array->str) );
}
array->str[array->count++] = str;
}
void strarray_add( struct strarray *array, ... )
{
va_list valist;
const char *str;
va_start( valist, array );
while ((str = va_arg( valist, const char *))) strarray_add_one( array, str );
va_end( valist );
}
void strarray_addv( struct strarray *array, char * const *argv )
{
while (*argv) strarray_add_one( array, *argv++ );
}
void strarray_addall( struct strarray *array, struct strarray args )
{
unsigned int i;
for (i = 0; i < args.count; i++) strarray_add_one( array, args.str[i] );
}
struct strarray strarray_fromstring( const char *str, const char *delim )
{
const char *tok;
struct strarray array = empty_strarray;
char *buf = xstrdup( str );
for (tok = strtok( buf, delim ); tok; tok = strtok( NULL, delim ))
strarray_add_one( &array, strdup( tok ));
free( buf );
return array;
}
void fatal_error( const char *msg, ... )
{
va_list valist;
va_start( valist, msg );
if (input_file_name)
{
fprintf( stderr, "%s:", input_file_name );
if (current_line)
fprintf( stderr, "%d:", current_line );
fputc( ' ', stderr );
}
else fprintf( stderr, "winebuild: " );
vfprintf( stderr, msg, valist );
va_end( valist );
exit(1);
}
void fatal_perror( const char *msg, ... )
{
va_list valist;
va_start( valist, msg );
if (input_file_name)
{
fprintf( stderr, "%s:", input_file_name );
if (current_line)
fprintf( stderr, "%d:", current_line );
fputc( ' ', stderr );
}
vfprintf( stderr, msg, valist );
perror( " " );
va_end( valist );
exit(1);
}
void error( const char *msg, ... )
{
va_list valist;
va_start( valist, msg );
if (input_file_name)
{
fprintf( stderr, "%s:", input_file_name );
if (current_line)
fprintf( stderr, "%d:", current_line );
fputc( ' ', stderr );
}
vfprintf( stderr, msg, valist );
va_end( valist );
nb_errors++;
}
void warning( const char *msg, ... )
{
va_list valist;
if (!display_warnings) return;
va_start( valist, msg );
if (input_file_name)
{
fprintf( stderr, "%s:", input_file_name );
if (current_line)
fprintf( stderr, "%d:", current_line );
fputc( ' ', stderr );
}
fprintf( stderr, "warning: " );
vfprintf( stderr, msg, valist );
va_end( valist );
}
int output( const char *format, ... )
{
int ret;
va_list valist;
va_start( valist, format );
ret = vfprintf( output_file, format, valist );
va_end( valist );
if (ret < 0) fatal_perror( "Output error" );
return ret;
}
void spawn( struct strarray args )
{
unsigned int i;
int status;
strarray_add_one( &args, NULL );
if (verbose)
for (i = 0; args.str[i]; i++)
fprintf( stderr, "%s%c", args.str[i], args.str[i+1] ? ' ' : '\n' );
if ((status = _spawnvp( _P_WAIT, args.str[0], args.str )))
{
if (status > 0) fatal_error( "%s failed with status %u\n", args.str[0], status );
else fatal_perror( "winebuild" );
exit( 1 );
}
}
/* find a build tool in the path, trying the various names */
struct strarray find_tool( const char *name, const char * const *names )
{
static char **dirs;
static unsigned int count, maxlen;
char *p, *file;
const char *alt_names[2];
unsigned int i, len;
struct stat st;
if (!dirs)
{
char *path;
/* split the path in directories */
if (!getenv( "PATH" )) fatal_error( "PATH not set, cannot find required tools\n" );
path = xstrdup( getenv( "PATH" ));
for (p = path, count = 2; *p; p++) if (*p == PATH_SEPARATOR) count++;
dirs = xmalloc( count * sizeof(*dirs) );
count = 0;
dirs[count++] = p = path;
while (*p)
{
while (*p && *p != PATH_SEPARATOR) p++;
if (!*p) break;
*p++ = 0;
dirs[count++] = p;
}
for (i = 0; i < count; i++) maxlen = max( maxlen, strlen(dirs[i])+2 );
}
if (!names)
{
alt_names[0] = name;
alt_names[1] = NULL;
names = alt_names;
}
while (*names)
{
len = strlen(*names) + sizeof(EXEEXT) + 1;
if (target_alias)
len += strlen(target_alias) + 1;
file = xmalloc( maxlen + len );
for (i = 0; i < count; i++)
{
strcpy( file, dirs[i] );
p = file + strlen(file);
if (p == file) *p++ = '.';
if (p[-1] != '/') *p++ = '/';
if (target_alias)
{
strcpy( p, target_alias );
p += strlen(p);
*p++ = '-';
}
strcpy( p, *names );
strcat( p, EXEEXT );
if (!stat( file, &st ) && S_ISREG(st.st_mode) && (st.st_mode & 0111))
{
struct strarray ret = empty_strarray;
strarray_add_one( &ret, file );
return ret;
}
}
free( file );
names++;
}
fatal_error( "cannot find the '%s' tool\n", name );
}
struct strarray get_as_command(void)
{
struct strarray args;
if (cc_command.count)
{
args = strarray_copy( cc_command );
strarray_add( &args, "-xassembler", "-c", NULL );
if (force_pointer_size)
strarray_add_one( &args, (force_pointer_size == 8) ? "-m64" : "-m32" );
if (cpu_option) strarray_add_one( &args, strmake("-mcpu=%s", cpu_option) );
if (arch_option) strarray_add_one( &args, strmake("-march=%s", arch_option) );
return args;
}
if (!as_command.count)
{
static const char * const commands[] = { "gas", "as", NULL };
as_command = find_tool( "as", commands );
}
args = strarray_copy( as_command );
if (force_pointer_size)
{
switch (target_platform)
{
case PLATFORM_APPLE:
strarray_add( &args, "-arch", (force_pointer_size == 8) ? "x86_64" : "i386", NULL );
break;
default:
switch(target_cpu)
{
case CPU_POWERPC:
strarray_add_one( &args, (force_pointer_size == 8) ? "-a64" : "-a32" );
break;
default:
strarray_add_one( &args, (force_pointer_size == 8) ? "--64" : "--32" );
break;
}
break;
}
}
if (cpu_option) strarray_add_one( &args, strmake("-mcpu=%s", cpu_option) );
return args;
}
struct strarray get_ld_command(void)
{
struct strarray args;
if (!ld_command.count)
{
static const char * const commands[] = { "ld", "gld", NULL };
ld_command = find_tool( "ld", commands );
}
args = strarray_copy( ld_command );
if (force_pointer_size)
{
switch (target_platform)
{
case PLATFORM_APPLE:
strarray_add( &args, "-arch", (force_pointer_size == 8) ? "x86_64" : "i386", NULL );
break;
case PLATFORM_FREEBSD:
strarray_add( &args, "-m", (force_pointer_size == 8) ? "elf_x86_64_fbsd" : "elf_i386_fbsd", NULL );
break;
default:
switch(target_cpu)
{
case CPU_POWERPC:
strarray_add( &args, "-m", (force_pointer_size == 8) ? "elf64ppc" : "elf32ppc", NULL );
break;
default:
strarray_add( &args, "-m", (force_pointer_size == 8) ? "elf_x86_64" : "elf_i386", NULL );
break;
}
break;
}
}
return args;
}
const char *get_nm_command(void)
{
if (!nm_command.count)
{
static const char * const commands[] = { "nm", "gnm", NULL };
nm_command = find_tool( "nm", commands );
}
if (nm_command.count > 1)
fatal_error( "multiple arguments in nm command not supported yet\n" );
return nm_command.str[0];
}
/* get a name for a temp file, automatically cleaned up on exit */
char *get_temp_file_name( const char *prefix, const char *suffix )
{
char *name;
const char *ext, *basename;
int fd;
if (!prefix || !prefix[0]) prefix = "winebuild";
if (!suffix) suffix = "";
if ((basename = strrchr( prefix, '/' ))) basename++;
else basename = prefix;
if (!(ext = strchr( basename, '.' ))) ext = prefix + strlen(prefix);
name = xmalloc( sizeof("/tmp/") + (ext - prefix) + sizeof(".XXXXXX") + strlen(suffix) );
memcpy( name, prefix, ext - prefix );
strcpy( name + (ext - prefix), ".XXXXXX" );
strcat( name, suffix );
if ((fd = mkstemps( name, strlen(suffix) )) == -1)
{
strcpy( name, "/tmp/" );
memcpy( name + 5, basename, ext - basename );
strcpy( name + 5 + (ext - basename), ".XXXXXX" );
strcat( name, suffix );
if ((fd = mkstemps( name, strlen(suffix) )) == -1)
fatal_error( "could not generate a temp file\n" );
}
close( fd );
strarray_add_one( &tmp_files, name );
return name;
}
/*******************************************************************
* buffer management
*
* Function for reading from/writing to a memory buffer.
*/
int byte_swapped = 0;
const char *input_buffer_filename;
const unsigned char *input_buffer;
size_t input_buffer_pos;
size_t input_buffer_size;
unsigned char *output_buffer;
size_t output_buffer_pos;
size_t output_buffer_size;
static void check_output_buffer_space( size_t size )
{
if (output_buffer_pos + size >= output_buffer_size)
{
output_buffer_size = max( output_buffer_size * 2, output_buffer_pos + size );
output_buffer = xrealloc( output_buffer, output_buffer_size );
}
}
void init_input_buffer( const char *file )
{
int fd;
struct stat st;
if ((fd = open( file, O_RDONLY | O_BINARY )) == -1) fatal_perror( "Cannot open %s", file );
if ((fstat( fd, &st ) == -1)) fatal_perror( "Cannot stat %s", file );
if (!st.st_size) fatal_error( "%s is an empty file\n", file );
#ifdef HAVE_MMAP
if ((input_buffer = mmap( NULL, st.st_size, PROT_READ, MAP_PRIVATE, fd, 0 )) == (void*)-1)
#endif
{
unsigned char *buffer = xmalloc( st.st_size );
if (read( fd, buffer, st.st_size ) != st.st_size) fatal_error( "Cannot read %s\n", file );
input_buffer = buffer;
}
close( fd );
input_buffer_filename = xstrdup( file );
input_buffer_size = st.st_size;
input_buffer_pos = 0;
byte_swapped = 0;
}
void init_output_buffer(void)
{
output_buffer_size = 1024;
output_buffer_pos = 0;
output_buffer = xmalloc( output_buffer_size );
}
void flush_output_buffer(void)
{
if (fwrite( output_buffer, 1, output_buffer_pos, output_file ) != output_buffer_pos)
fatal_error( "Error writing to %s\n", output_file_name );
free( output_buffer );
}
unsigned char get_byte(void)
{
if (input_buffer_pos >= input_buffer_size)
fatal_error( "%s is a truncated file\n", input_buffer_filename );
return input_buffer[input_buffer_pos++];
}
unsigned short get_word(void)
{
unsigned short ret;
if (input_buffer_pos + sizeof(ret) > input_buffer_size)
fatal_error( "%s is a truncated file\n", input_buffer_filename );
memcpy( &ret, input_buffer + input_buffer_pos, sizeof(ret) );
if (byte_swapped) ret = (ret << 8) | (ret >> 8);
input_buffer_pos += sizeof(ret);
return ret;
}
unsigned int get_dword(void)
{
unsigned int ret;
if (input_buffer_pos + sizeof(ret) > input_buffer_size)
fatal_error( "%s is a truncated file\n", input_buffer_filename );
memcpy( &ret, input_buffer + input_buffer_pos, sizeof(ret) );
if (byte_swapped)
ret = ((ret << 24) | ((ret << 8) & 0x00ff0000) | ((ret >> 8) & 0x0000ff00) | (ret >> 24));
input_buffer_pos += sizeof(ret);
return ret;
}
void put_data( const void *data, size_t size )
{
check_output_buffer_space( size );
memcpy( output_buffer + output_buffer_pos, data, size );
output_buffer_pos += size;
}
void put_byte( unsigned char val )
{
check_output_buffer_space( 1 );
output_buffer[output_buffer_pos++] = val;
}
void put_word( unsigned short val )
{
if (byte_swapped) val = (val << 8) | (val >> 8);
put_data( &val, sizeof(val) );
}
void put_dword( unsigned int val )
{
if (byte_swapped)
val = ((val << 24) | ((val << 8) & 0x00ff0000) | ((val >> 8) & 0x0000ff00) | (val >> 24));
put_data( &val, sizeof(val) );
}
void put_qword( unsigned int val )
{
if (byte_swapped)
{
put_dword( 0 );
put_dword( val );
}
else
{
put_dword( val );
put_dword( 0 );
}
}
/* pointer-sized word */
void put_pword( unsigned int val )
{
if (get_ptr_size() == 8) put_qword( val );
else put_dword( val );
}
void align_output( unsigned int align )
{
size_t size = align - (output_buffer_pos % align);
if (size == align) return;
check_output_buffer_space( size );
memset( output_buffer + output_buffer_pos, 0, size );
output_buffer_pos += size;
}
/* output a standard header for generated files */
void output_standard_file_header(void)
{
if (spec_file_name)
output( "/* File generated automatically from %s; do not edit! */\n", spec_file_name );
else
output( "/* File generated automatically; do not edit! */\n" );
output( "/* This file can be copied, modified and distributed without restriction. */\n\n" );
}
/* dump a byte stream into the assembly code */
void dump_bytes( const void *buffer, unsigned int size )
{
unsigned int i;
const unsigned char *ptr = buffer;
if (!size) return;
output( "\t.byte " );
for (i = 0; i < size - 1; i++, ptr++)
{
if ((i % 16) == 15) output( "0x%02x\n\t.byte ", *ptr );
else output( "0x%02x,", *ptr );
}
output( "0x%02x\n", *ptr );
}
/*******************************************************************
* open_input_file
*
* Open a file in the given srcdir and set the input_file_name global variable.
*/
FILE *open_input_file( const char *srcdir, const char *name )
{
char *fullname;
FILE *file = fopen( name, "r" );
if (!file && srcdir)
{
fullname = strmake( "%s/%s", srcdir, name );
file = fopen( fullname, "r" );
}
else fullname = xstrdup( name );
if (!file) fatal_error( "Cannot open file '%s'\n", fullname );
input_file_name = fullname;
current_line = 1;
return file;
}
/*******************************************************************
* close_input_file
*
* Close the current input file (must have been opened with open_input_file).
*/
void close_input_file( FILE *file )
{
fclose( file );
free( input_file_name );
input_file_name = NULL;
current_line = 0;
}
/*******************************************************************
* remove_stdcall_decoration
*
* Remove a possible @xx suffix from a function name.
* Return the numerical value of the suffix, or -1 if none.
*/
int remove_stdcall_decoration( char *name )
{
char *p, *end = strrchr( name, '@' );
if (!end || !end[1] || end == name) return -1;
if (target_cpu != CPU_x86) return -1;
/* make sure all the rest is digits */
for (p = end + 1; *p; p++) if (!isdigit(*p)) return -1;
*end = 0;
return atoi( end + 1 );
}
/*******************************************************************
* assemble_file
*
* Run a file through the assembler.
*/
void assemble_file( const char *src_file, const char *obj_file )
{
struct strarray args = get_as_command();
strarray_add( &args, "-o", obj_file, src_file, NULL );
spawn( args );
}
/*******************************************************************
* alloc_dll_spec
*
* Create a new dll spec file descriptor
*/
DLLSPEC *alloc_dll_spec(void)
{
DLLSPEC *spec;
spec = xmalloc( sizeof(*spec) );
memset( spec, 0, sizeof(*spec) );
spec->type = SPEC_WIN32;
spec->base = MAX_ORDINALS;
spec->characteristics = IMAGE_FILE_EXECUTABLE_IMAGE;
spec->subsystem = 0;
spec->subsystem_major = 4;
spec->subsystem_minor = 0;
if (get_ptr_size() > 4)
spec->characteristics |= IMAGE_FILE_LARGE_ADDRESS_AWARE;
else
spec->characteristics |= IMAGE_FILE_32BIT_MACHINE;
spec->dll_characteristics = IMAGE_DLLCHARACTERISTICS_NX_COMPAT;
return spec;
}
/*******************************************************************
* free_dll_spec
*
* Free dll spec file descriptor
*/
void free_dll_spec( DLLSPEC *spec )
{
int i;
for (i = 0; i < spec->nb_entry_points; i++)
{
ORDDEF *odp = &spec->entry_points[i];
free( odp->name );
free( odp->export_name );
free( odp->link_name );
}
free( spec->file_name );
free( spec->dll_name );
free( spec->c_name );
free( spec->init_func );
free( spec->entry_points );
free( spec->names );
free( spec->ordinals );
free( spec->resources );
free( spec );
}
/*******************************************************************
* make_c_identifier
*
* Map a string to a valid C identifier.
*/
char *make_c_identifier( const char *str )
{
char *p, buffer[256];
for (p = buffer; *str && p < buffer+sizeof(buffer)-1; p++, str++)
{
if (isalnum(*str)) *p = *str;
else *p = '_';
}
*p = 0;
return xstrdup( buffer );
}
/*******************************************************************
* get_stub_name
*
* Generate an internal name for a stub entry point.
*/
const char *get_stub_name( const ORDDEF *odp, const DLLSPEC *spec )
{
static char *buffer;
free( buffer );
if (odp->name || odp->export_name)
{
char *p;
buffer = strmake( "__wine_stub_%s", odp->name ? odp->name : odp->export_name );
/* make sure name is a legal C identifier */
for (p = buffer; *p; p++) if (!isalnum(*p) && *p != '_') break;
if (!*p) return buffer;
free( buffer );
}
buffer = strmake( "__wine_stub_%s_%d", make_c_identifier(spec->file_name), odp->ordinal );
return buffer;
}
/* parse a cpu name and return the corresponding value */
int get_cpu_from_name( const char *name )
{
unsigned int i;
for (i = 0; i < sizeof(cpu_names)/sizeof(cpu_names[0]); i++)
if (!strcmp( cpu_names[i].name, name )) return cpu_names[i].cpu;
return -1;
}
/*****************************************************************
* Function: get_alignment
*
* Description:
* According to the info page for gas, the .align directive behaves
* differently on different systems. On some architectures, the
* argument of a .align directive is the number of bytes to pad to, so
* to align on an 8-byte boundary you'd say
* .align 8
* On other systems, the argument is "the number of low-order zero bits
* that the location counter must have after advancement." So to
* align on an 8-byte boundary you'd say
* .align 3
*
* The reason gas is written this way is that it's trying to mimick
* native assemblers for the various architectures it runs on. gas
* provides other directives that work consistently across
* architectures, but of course we want to work on all arches with or
* without gas. Hence this function.
*
*
* Parameters:
* align -- the number of bytes to align to. Must be a power of 2.
*/
unsigned int get_alignment(unsigned int align)
{
unsigned int n;
assert( !(align & (align - 1)) );
switch(target_cpu)
{
case CPU_x86:
case CPU_x86_64:
if (target_platform != PLATFORM_APPLE) return align;
/* fall through */
case CPU_POWERPC:
case CPU_ARM:
case CPU_ARM64:
n = 0;
while ((1u << n) != align) n++;
return n;
}
/* unreached */
assert(0);
return 0;
}
/* return the page size for the target CPU */
unsigned int get_page_size(void)
{
switch(target_cpu)
{
case CPU_x86:
case CPU_x86_64:
case CPU_POWERPC:
case CPU_ARM:
return 0x1000;
case CPU_ARM64:
return 0x10000;
}
/* unreached */
assert(0);
return 0;
}
/* return the size of a pointer on the target CPU */
unsigned int get_ptr_size(void)
{
switch(target_cpu)
{
case CPU_x86:
case CPU_POWERPC:
case CPU_ARM:
return 4;
case CPU_x86_64:
case CPU_ARM64:
return 8;
}
/* unreached */
assert(0);
return 0;
}
/* return the total size in bytes of the arguments on the stack */
unsigned int get_args_size( const ORDDEF *odp )
{
int i, size;
for (i = size = 0; i < odp->u.func.nb_args; i++)
{
switch (odp->u.func.args[i])
{
case ARG_INT64:
case ARG_DOUBLE:
size += 8;
break;
case ARG_INT128:
/* int128 is passed as pointer on x86_64 */
if (target_cpu != CPU_x86_64)
{
size += 16;
break;
}
/* fall through */
default:
size += get_ptr_size();
break;
}
}
return size;
}
/* return the assembly name for a C symbol */
const char *asm_name( const char *sym )
{
static char *buffer;
switch (target_platform)
{
case PLATFORM_APPLE:
case PLATFORM_WINDOWS:
if (sym[0] == '.' && sym[1] == 'L') return sym;
free( buffer );
buffer = strmake( "_%s", sym );
return buffer;
default:
return sym;
}
}
/* return an assembly function declaration for a C function name */
const char *func_declaration( const char *func )
{
static char *buffer;
switch (target_platform)
{
case PLATFORM_APPLE:
return "";
case PLATFORM_WINDOWS:
free( buffer );
buffer = strmake( ".def _%s; .scl 2; .type 32; .endef", func );
break;
default:
free( buffer );
switch(target_cpu)
{
case CPU_ARM:
case CPU_ARM64:
buffer = strmake( ".type %s,%%function", func );
break;
default:
buffer = strmake( ".type %s,@function", func );
break;
}
break;
}
return buffer;
}
/* output a size declaration for an assembly function */
void output_function_size( const char *name )
{
switch (target_platform)
{
case PLATFORM_APPLE:
case PLATFORM_WINDOWS:
break;
default:
output( "\t.size %s, .-%s\n", name, name );
break;
}
}
/* output a .cfi directive */
void output_cfi( const char *format, ... )
{
va_list valist;
if (!unwind_tables) return;
va_start( valist, format );
fputc( '\t', output_file );
vfprintf( output_file, format, valist );
fputc( '\n', output_file );
va_end( valist );
}
/* output the GNU note for non-exec stack */
void output_gnu_stack_note(void)
{
switch (target_platform)
{
case PLATFORM_WINDOWS:
case PLATFORM_APPLE:
break;
default:
switch(target_cpu)
{
case CPU_ARM:
case CPU_ARM64:
output( "\t.section .note.GNU-stack,\"\",%%progbits\n" );
break;
default:
output( "\t.section .note.GNU-stack,\"\",@progbits\n" );
break;
}
break;
}
}
/* return a global symbol declaration for an assembly symbol */
const char *asm_globl( const char *func )
{
static char *buffer;
free( buffer );
switch (target_platform)
{
case PLATFORM_APPLE:
buffer = strmake( "\t.globl _%s\n\t.private_extern _%s\n_%s:", func, func, func );
break;
case PLATFORM_WINDOWS:
buffer = strmake( "\t.globl _%s\n_%s:", func, func );
break;
default:
buffer = strmake( "\t.globl %s\n\t.hidden %s\n%s:", func, func, func );
break;
}
return buffer;
}
const char *get_asm_ptr_keyword(void)
{
switch(get_ptr_size())
{
case 4: return ".long";
case 8: return ".quad";
}
assert(0);
return NULL;
}
const char *get_asm_string_keyword(void)
{
switch (target_platform)
{
case PLATFORM_APPLE:
return ".asciz";
default:
return ".string";
}
}
const char *get_asm_rodata_section(void)
{
switch (target_platform)
{
case PLATFORM_APPLE: return ".const";
default: return ".section .rodata";
}
}
const char *get_asm_string_section(void)
{
switch (target_platform)
{
case PLATFORM_APPLE: return ".cstring";
default: return ".section .rodata";
}
}
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