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authormidipix <writeonce@midipix.org>2018-08-03 20:56:45 +0000
committermidipix <writeonce@midipix.org>2018-08-03 21:13:30 -0400
commita3e2cfa926e49bb4f63557bd990f83b8f4685734 (patch)
tree3edaf363a11a1fe1050780de272309ca0ac40db8 /src/helper
parent18a091990a2de49fb0c9d85b0ae8e86825f2104f (diff)
downloadmdso-a3e2cfa926e49bb4f63557bd990f83b8f4685734.tar.bz2
mdso-a3e2cfa926e49bb4f63557bd990f83b8f4685734.tar.xz
library interfaces: object file generation: simplify, re-implement with mmap.
Diffstat (limited to 'src/helper')
-rw-r--r--src/helper/mdso_create_output.c53
1 files changed, 48 insertions, 5 deletions
diff --git a/src/helper/mdso_create_output.c b/src/helper/mdso_create_output.c
index 24ed757..39dd4d7 100644
--- a/src/helper/mdso_create_output.c
+++ b/src/helper/mdso_create_output.c
@@ -10,6 +10,7 @@
#include <stddef.h>
#include <unistd.h>
#include <fcntl.h>
+#include <sys/mman.h>
#include <mdso/mdso.h>
#include "mdso_driver_impl.h"
@@ -25,13 +26,40 @@ static int mdso_create_output(
fddst = mdso_driver_fddst(dctx);
if ((fdout = openat(fddst,name,
- O_CREAT|O_TRUNC|O_WRONLY|O_NOCTTY|O_NOFOLLOW,
- S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0)
+ O_CREAT|O_TRUNC|O_WRONLY|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 FILE * mdso_create_output_stream(
const struct mdso_driver_ctx * dctx,
const char * name)
@@ -51,6 +79,21 @@ static FILE * mdso_create_output_stream(
return fout;
}
+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;
+}
+
FILE * mdso_create_archive(
const struct mdso_driver_ctx * dctx,
const char * arname)
@@ -67,9 +110,9 @@ int mdso_create_asmsrc(
: mdso_driver_fdout(dctx);
}
-FILE * mdso_create_object(
+int mdso_create_object(
const struct mdso_driver_ctx * dctx,
- const char * objname)
+ struct mdso_object * obj)
{
- return mdso_create_output_stream(dctx,objname);
+ return mdso_create_mapped_output(dctx,obj);
}