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/***************************************************************/
/* perk: PE Resource Kit */
/* Copyright (C) 2015--2021 SysDeer Technologies, LLC */
/* Released under GPLv2 and GPLv3; see COPYING.PERK. */
/***************************************************************/
#include <stdint.h>
#include <unistd.h>
#include <fcntl.h>
#define ARGV_DRIVER
#include <perk/perk.h>
#include <perk/perk_output.h>
#include "perk_version.h"
#include "perk_driver_impl.h"
#include "argv/argv.h"
/* package info */
static const struct pe_source_version pe_src_version = {
PERK_TAG_VER_MAJOR,
PERK_TAG_VER_MINOR,
PERK_TAG_VER_PATCH,
PERK_GIT_VERSION
};
/* default fd context */
static const struct pe_fd_ctx pe_default_fdctx = {
.fdin = STDIN_FILENO,
.fdout = STDOUT_FILENO,
.fderr = STDERR_FILENO,
.fdcwd = AT_FDCWD,
.fddst = AT_FDCWD,
.fdlog = (-1),
};
struct pe_driver_ctx_alloc {
struct argv_meta * meta;
struct pe_driver_ctx_impl ctx;
uint64_t guard;
const char * units[];
};
static uint32_t pe_argv_flags(uint32_t flags)
{
uint32_t ret = ARGV_CLONE_VECTOR;
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 int pe_driver_usage(
int fdout,
const char * program,
const char * arg,
const struct argv_option ** optv,
struct argv_meta * meta)
{
char header[512];
snprintf(header,sizeof(header),
"Usage: %s [options] <file>...\n" "Options:\n",
program);
argv_usage(fdout,header,optv,arg);
argv_free(meta);
return PERK_USAGE;
}
static struct pe_driver_ctx_impl * pe_driver_ctx_alloc(
struct argv_meta * meta,
const struct pe_fd_ctx * fdctx,
const struct pe_common_ctx * cctx,
size_t nunits)
{
struct pe_driver_ctx_alloc * ictx;
size_t size;
struct argv_entry * entry;
const char ** units;
int elements;
size = sizeof(struct pe_driver_ctx_alloc);
size += (nunits+1)*sizeof(const char *);
if (!(ictx = calloc(1,size)))
return 0;
memcpy(&ictx->ctx.fdctx,fdctx,sizeof(*fdctx));
memcpy(&ictx->ctx.cctx,cctx,sizeof(*cctx));
elements = sizeof(ictx->ctx.erribuf) / sizeof(*ictx->ctx.erribuf);
ictx->ctx.errinfp = &ictx->ctx.erriptr[0];
ictx->ctx.erricap = &ictx->ctx.erriptr[--elements];
ictx->meta = meta;
for (entry=meta->entries,units=ictx->units; entry->fopt || entry->arg; entry++)
if (!entry->fopt)
*units++ = entry->arg;
ictx->ctx.ctx.units = ictx->units;
ictx->ctx.ctx.errv = ictx->ctx.errinfp;
return &ictx->ctx;
}
static int pe_get_driver_ctx_fail(struct argv_meta * meta)
{
argv_free(meta);
return -1;
}
int pe_get_driver_ctx(
char ** argv,
char ** envp,
uint32_t flags,
const struct pe_fd_ctx * fdctx,
struct pe_driver_ctx ** pctx)
{
struct pe_driver_ctx_impl * ctx;
struct pe_common_ctx cctx;
const struct argv_option * optv[PERK_OPTV_ELEMENTS];
struct argv_meta * meta;
struct argv_entry * entry;
size_t nunits;
const char * program;
const char * pretty;
(void)envp;
if (!fdctx)
fdctx = &pe_default_fdctx;
argv_optv_init(pe_default_options,optv);
if (!(meta = argv_get(
argv,optv,
pe_argv_flags(flags),
fdctx->fderr)))
return -1;
pretty = 0;
nunits = 0;
program = argv_program_name(argv[0]);
memset(&cctx,0,sizeof(cctx));
cctx.drvflags = flags;
if (!argv[1] && (flags & PERK_DRIVER_VERBOSITY_USAGE))
return pe_driver_usage(
fdctx->fderr,
program,
0,optv,meta);
/* 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)
return pe_driver_usage(
fdctx->fdout,
program,entry->arg,
optv,meta);
break;
case TAG_VERSION:
cctx.drvflags |= PERK_DRIVER_VERSION;
break;
case TAG_PRETTY:
pretty = entry->arg;
break;
case TAG_CATEGORY:
cctx.fmtflags |= PERK_OUTPUT_IMAGE_CATEGORY;
break;
case TAG_SECTIONS:
cctx.fmtflags |= PERK_OUTPUT_IMAGE_SECTIONS;
break;
case TAG_SYMBOLS:
cctx.fmtflags |= PERK_OUTPUT_IMAGE_SYMBOLS;
break;
case TAG_STRINGS:
cctx.fmtflags |= PERK_OUTPUT_IMAGE_STRINGS;
break;
case TAG_EXPSYMS:
cctx.fmtflags |= PERK_OUTPUT_EXPORT_SYMS;
break;
case TAG_IMPLIBS:
cctx.fmtflags |= PERK_OUTPUT_IMPORT_LIBS;
break;
case TAG_IMPSYMS:
cctx.fmtflags |= PERK_OUTPUT_IMPORT_SYMS;
break;
case TAG_DSOLIBS:
cctx.fmtflags |= PERK_OUTPUT_MDSO_LIBS;
break;
case TAG_DSOSYMS:
cctx.fmtflags |= PERK_OUTPUT_MDSO_SYMS;
break;
case TAG_HDRDUMP:
if (!entry->arg) {
cctx.hdrdump = 0;
cctx.hdrdump = ~cctx.hdrdump;
} else if (!strcmp(entry->arg,"dos")) {
cctx.hdrdump = PERK_HDRDUMP_IMAGE_DOS_HEADER;
} else if (!strcmp(entry->arg,"image.dos")) {
cctx.hdrdump = PERK_HDRDUMP_IMAGE_DOS_HEADER;
} else if (!strcmp(entry->arg,"coff")) {
cctx.hdrdump = PERK_HDRDUMP_COFF_IMAGE_HEADER;
cctx.hdrdump |= PERK_HDRDUMP_COFF_OBJECT_HEADER;
cctx.hdrdump |= PERK_HDRDUMP_COFF_OPT_HEADER;
} else if (!strcmp(entry->arg,"coff.image")) {
cctx.hdrdump = PERK_HDRDUMP_COFF_IMAGE_HEADER;
} else if (!strcmp(entry->arg,"coff.obj")) {
cctx.hdrdump = PERK_HDRDUMP_COFF_OBJECT_HEADER;
} else if (!strcmp(entry->arg,"coff.object")) {
cctx.hdrdump = PERK_HDRDUMP_COFF_OBJECT_HEADER;
} else if (!strcmp(entry->arg,"coff.opt")) {
cctx.hdrdump = PERK_HDRDUMP_COFF_OPT_HEADER;
} else if (!strcmp(entry->arg,"coff.optional")) {
cctx.hdrdump = PERK_HDRDUMP_COFF_OPT_HEADER;
} else if (!strcmp(entry->arg,"sectbl")) {
cctx.hdrdump = PERK_HDRDUMP_SECTION_TABLE;
} else if (!strcmp(entry->arg,"section.table")) {
cctx.hdrdump = PERK_HDRDUMP_SECTION_TABLE;
} else if (!strcmp(entry->arg,"exphdr")) {
cctx.hdrdump = PERK_HDRDUMP_EXPORT_HEADER;
} else if (!strcmp(entry->arg,"export.header")) {
cctx.hdrdump = PERK_HDRDUMP_EXPORT_HEADER;
} else if (!strcmp(entry->arg,"imptbl")) {
cctx.hdrdump = PERK_HDRDUMP_IMPORT_TABLE;
} else if (!strcmp(entry->arg,"import.table")) {
cctx.hdrdump = PERK_HDRDUMP_IMPORT_TABLE;
}
break;
}
} else
nunits++;
}
if (pretty && !strcmp(pretty,"yaml"))
cctx.fmtflags |= PERK_PRETTY_YAML;
else if (pretty && !strcmp(pretty,"dlltool"))
cctx.fmtflags |= PERK_PRETTY_DLLTOOL;
if (!(ctx = pe_driver_ctx_alloc(meta,fdctx,&cctx,nunits)))
return pe_get_driver_ctx_fail(meta);
ctx->ctx.program = program;
ctx->ctx.cctx = &ctx->cctx;
*pctx = &ctx->ctx;
return PERK_OK;
}
static void pe_free_driver_ctx_impl(struct pe_driver_ctx_alloc * ictx)
{
argv_free(ictx->meta);
free(ictx);
}
void pe_free_driver_ctx(struct pe_driver_ctx * ctx)
{
struct pe_driver_ctx_alloc * ictx;
uintptr_t addr;
if (ctx) {
addr = (uintptr_t)ctx - offsetof(struct pe_driver_ctx_impl,ctx);
addr = addr - offsetof(struct pe_driver_ctx_alloc,ctx);
ictx = (struct pe_driver_ctx_alloc *)addr;
pe_free_driver_ctx_impl(ictx);
}
}
const struct pe_source_version * pe_source_version(void)
{
return &pe_src_version;
}
int pe_get_driver_fdctx(
const struct pe_driver_ctx * dctx,
struct pe_fd_ctx * fdctx)
{
struct pe_driver_ctx_impl * ictx;
ictx = pe_get_driver_ictx(dctx);
fdctx->fdin = ictx->fdctx.fdin;
fdctx->fdout = ictx->fdctx.fdout;
fdctx->fderr = ictx->fdctx.fderr;
fdctx->fdlog = ictx->fdctx.fdlog;
fdctx->fdcwd = ictx->fdctx.fdcwd;
fdctx->fddst = ictx->fdctx.fddst;
return 0;
}
int pe_set_driver_fdctx(
struct pe_driver_ctx * dctx,
const struct pe_fd_ctx * fdctx)
{
struct pe_driver_ctx_impl * ictx;
ictx = pe_get_driver_ictx(dctx);
ictx->fdctx.fdin = fdctx->fdin;
ictx->fdctx.fdout = fdctx->fdout;
ictx->fdctx.fderr = fdctx->fderr;
ictx->fdctx.fdlog = fdctx->fdlog;
ictx->fdctx.fdcwd = fdctx->fdcwd;
ictx->fdctx.fddst = fdctx->fddst;
return 0;
}
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