driver integration 8/9: driver code: initial implementation.

2 files changed, 255 insertions, 0 deletions

diff --git a/src/driver/pe_driver_ctx.c b/src/driver/pe_driver_ctx.c
new file mode 100644
index 0000000..1054ac7
--- /dev/null
+++ b/src/driver/pe_driver_ctx.c
@@ -0,0 +1,203 @@
+#include <stdint.h>
+#include <fcntl.h>
+#include <perk/perk.h>
+#include "argv/argv.h"
+
+enum app_tags {
+	TAG_HELP,
+	TAG_VERSION,
+	TAG_OUTPUT,
+	TAG_EXPSYMS,
+};
+
+static const struct argv_option options[] = {
+	{"version",	'v',TAG_VERSION,ARGV_OPTARG_NONE,	0,0,
+								"show version information"},
+
+	{"help",	'h',TAG_HELP,	ARGV_OPTARG_OPTIONAL,	"short|long",0,
+								"show usage information "
+								"[listing %s options only]"},
+
+	{"output",	'o',TAG_OUTPUT,	ARGV_OPTARG_REQUIRED,	0,"<file>",
+								"write output to %s"},
+
+	{"expsyms",	'e',TAG_EXPSYMS,ARGV_OPTARG_NONE,	0,0,
+								"print exported symbols" },
+	{0}
+};
+
+struct pe_driver_ctx_impl {
+	struct argv_meta *	meta;
+	struct pe_symbol_ctx	symctx;
+	struct pe_output_ctx	outctx;
+	struct pe_linker_ctx	lnkctx;
+	struct pe_server_ctx	srvctx;
+	struct pe_driver_ctx	ctx;
+	uint64_t		guard;
+	const char *		units[];
+};
+
+static uint32_t pe_argv_flags(uint32_t flags)
+{
+	uint32_t ret = 0;
+
+	if (flags & PERK_DRIVER_VERBOSITY_NONE)
+		ret |= ARGV_VERBOSITY_NONE;
+
+	if (flags & PERK_DRIVER_VERBOSITY_ERRORS)
+		ret |= ARGV_VERBOSITY_ERRORS;
+
+	if (flags & PERK_DRIVER_VERBOSITY_STATUS)
+		ret |= ARGV_VERBOSITY_STATUS;
+
+	return ret;
+}
+
+static struct pe_driver_ctx * pe_driver_ctx_alloc(struct argv_meta * meta, size_t nunits)
+{
+	struct pe_driver_ctx_impl *	ictx;
+	size_t				size;
+	struct argv_entry *		entry;
+	const char **			units;
+
+	size =  sizeof(struct pe_driver_ctx_impl);
+	size += (nunits+1)*sizeof(const char *);
+
+	if (!(ictx = calloc(size,1)))
+		return 0;
+
+	ictx->meta		= meta;
+	ictx->ctx.cctx.symctx	= &ictx->symctx;
+	ictx->ctx.cctx.outctx	= &ictx->outctx;
+	ictx->ctx.cctx.lnkctx	= &ictx->lnkctx;
+	ictx->ctx.cctx.srvctx	= &ictx->srvctx;
+
+	for (entry=meta->entries,units=ictx->units; entry->fopt || entry->arg; entry++)
+		if (!entry->fopt)
+			*units++ = entry->arg;
+
+	ictx->ctx.units = ictx->units;
+	return &ictx->ctx;
+}
+
+int pe_get_driver_ctx_fail(struct argv_meta * meta)
+{
+	argv_free(meta);
+	return -1;
+}
+
+int pe_get_driver_ctx(
+	const char **		argv,
+	const char **		envp,
+	uint32_t		flags,
+	struct pe_driver_ctx ** pctx)
+{
+	struct pe_driver_ctx *	ctx;
+	struct argv_meta *	meta;
+	struct argv_entry *	entry;
+	size_t			nunits;
+	uint64_t		dflags;
+	uint64_t		fflags;
+	const char *		program;
+	const char *		output;
+	int			fdout;
+	char			header[512];
+
+	if (!(meta = argv_get(argv,options,pe_argv_flags(flags))))
+		return -1;
+
+	dflags	= 0;
+	fflags	= 0;
+	output	= 0;
+	nunits	= 0;
+	program = argv_program_name(argv[0]);
+
+	/* get options, count units */
+	for (entry=meta->entries; entry->fopt || entry->arg; entry++) {
+		if (entry->fopt) {
+			switch (entry->tag) {
+				case TAG_HELP:
+					if (flags & PERK_DRIVER_VERBOSITY_USAGE) {
+						snprintf(header,sizeof(header),
+							"Usage: %s [options] <file>...\n" "Options:\n",
+							program);
+
+						argv_usage(stdout,header,options,entry->arg);
+						argv_free(meta);
+						return PERK_USAGE;
+					}
+
+				case TAG_VERSION:
+					dflags |= PERK_DRIVER_FLAG_VERSION;
+					break;
+
+				case TAG_OUTPUT:
+					output = entry->arg;
+					break;
+
+				case TAG_EXPSYMS:
+					fflags |= PERK_OUTPUT_FLAG_EXPORT_SYMS;
+					break;
+			}
+		} else
+			nunits++;
+	}
+
+	if (output && ((fdout = open(output,
+			O_CREAT|O_TRUNC|O_WRONLY|O_NOCTTY|O_NOFOLLOW,
+			S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH)) < 0))
+		return pe_get_driver_ctx_fail(meta);
+
+	if (!(ctx = pe_driver_ctx_alloc(meta,nunits)))
+		return pe_get_driver_ctx_fail(meta);
+
+	ctx->program		= program;
+	ctx->cctx.drvflags	= dflags;
+	ctx->cctx.fmtflags	= fflags;
+	ctx->cctx.output	= output;
+	ctx->cctx.fdout		= output ? fdout : -1;
+
+	ctx->cctx.fdin		= -1;
+	ctx->cctx.fderr		= -1;
+	ctx->cctx.fdlog		= -1;
+	ctx->cctx.fdsrc		= AT_FDCWD;
+	ctx->cctx.fddst		= AT_FDCWD;
+	ctx->cctx.fdtmp		= AT_FDCWD;
+
+	*pctx = ctx;
+	return PERK_OK;
+}
+
+static void pe_driver_close_fds(struct pe_common_ctx * cctx)
+{
+	if (cctx->status && cctx->output)
+		unlinkat(cctx->fddst,cctx->output,0);
+
+	if (cctx->fdout >= 0)
+		close(cctx->fdout);
+}
+
+static void pe_free_driver_ctx_impl(struct pe_driver_ctx_impl * ictx)
+{
+	if (ictx->symctx.append)
+		free(ictx->symctx.append);
+
+	if (ictx->symctx.exclude)
+		free(ictx->symctx.exclude);
+
+	pe_driver_close_fds(&ictx->ctx.cctx);
+	argv_free(ictx->meta);
+	free(ictx);
+}
+
+void pe_free_driver_ctx(struct pe_driver_ctx * ctx)
+{
+	struct pe_driver_ctx_impl *	ictx;
+	uintptr_t			addr;
+
+	if (ctx) {
+		addr = (uintptr_t)ctx - offsetof(struct pe_driver_ctx_impl,ctx);
+		ictx = (struct pe_driver_ctx_impl *)addr;
+		pe_free_driver_ctx_impl(ictx);
+	}
+}
diff --git a/src/driver/pe_unit_ctx.c b/src/driver/pe_unit_ctx.c
new file mode 100644
index 0000000..5bcac3d
--- /dev/null
+++ b/src/driver/pe_unit_ctx.c
@@ -0,0 +1,52 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <perk/perk.h>
+
+static int pe_free_unit_ctx_impl(struct pe_unit_ctx * ctx, int status)
+{
+	if (ctx) {
+		pe_free_image_meta(ctx->meta);
+		pe_unmap_raw_image(&ctx->map);
+		free(ctx);
+	}
+
+	return status;
+}
+
+int pe_get_unit_ctx(
+	struct pe_driver_ctx *	dctx,
+	const char *		path,
+	struct pe_unit_ctx **	pctx)
+{
+	struct pe_unit_ctx *	ctx;
+	int			prot;
+
+	if (!dctx || !(ctx = calloc(sizeof(*ctx),1)))
+		return -1;
+
+	prot = (dctx->cctx.actflags & PERK_ACTION_FLAG_MAP_READWRITE)
+		? PROT_READ | PROT_WRITE
+		: PROT_READ;
+
+	if (pe_map_raw_image(dctx->cctx.fdin,path,prot,&ctx->map))
+		return pe_free_unit_ctx_impl(ctx,-1);
+
+	if (pe_get_image_meta(&ctx->map,&ctx->meta))
+		return pe_free_unit_ctx_impl(ctx,-1);
+
+	memcpy(&ctx->cctx,&dctx->cctx,
+		sizeof(ctx->cctx));
+
+	ctx->path	= path;
+	ctx->cctx.prot	= prot;
+
+	*pctx = ctx;
+	return 0;
+}
+
+void pe_free_unit_ctx(struct pe_unit_ctx * ctx)
+{
+	pe_free_unit_ctx_impl(ctx,0);
+}