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/****************************************************************/
/* mdso: midipix dso scavenger */
/* Copyright (C) 2015--2017 Z. Gilboa */
/* Released under GPLv2 and GPLv3; see COPYING.MDSO. */
/****************************************************************/
#include <stdint.h>
#include <stdlib.h>
#include <stdio.h>
#include <stddef.h>
#include <unistd.h>
#include <fcntl.h>
#include <sys/mman.h>
#include <mdso/mdso.h>
#include "mdso_driver_impl.h"
#include "mdso_errinfo_impl.h"
static int mdso_create_output(
const struct mdso_driver_ctx * dctx,
const char * name)
{
int fddst;
int fdout;
fddst = mdso_driver_fddst(dctx);
if ((fdout = openat(fddst,name,
O_CREAT|O_TRUNC|O_RDWR|O_NOCTTY|O_NOFOLLOW,
S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
return MDSO_SYSTEM_ERROR(dctx);
return fdout;
}
static int mdso_map_output(
const struct mdso_driver_ctx * dctx,
struct mdso_object * obj,
int fd)
{
void * addr;
if (ftruncate(fd,obj->size)) {
close(fd);
return MDSO_SYSTEM_ERROR(dctx);
}
addr = mmap(
0,obj->size,
PROT_WRITE,MAP_SHARED,
fd,0);
close(fd);
if (addr == MAP_FAILED)
return MDSO_SYSTEM_ERROR(dctx);
obj->addr = addr;
return 0;
}
static int mdso_create_mapped_output(
const struct mdso_driver_ctx * dctx,
struct mdso_object * obj)
{
int fd;
if ((fd = mdso_create_output(dctx,obj->name)) < 0)
return MDSO_NESTED_ERROR(dctx);
if (mdso_map_output(dctx,obj,fd) < 0)
return MDSO_NESTED_ERROR(dctx);
return 0;
}
int mdso_create_asmsrc(
const struct mdso_driver_ctx * dctx,
const char * asmname)
{
if (dctx->cctx->dstdir)
return mdso_create_output(dctx,asmname);
else if (dctx->cctx->drvflags & MDSO_DRIVER_GENERATE_OBJECTS)
return mdso_create_output(dctx,asmname);
else
return mdso_driver_fdout(dctx);
}
int mdso_create_object(
const struct mdso_driver_ctx * dctx,
struct mdso_object * obj)
{
return mdso_create_mapped_output(dctx,obj);
}
int mdso_create_archive(
const struct mdso_driver_ctx * dctx,
struct mdso_object * obj)
{
return mdso_create_mapped_output(dctx,obj);
}
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