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#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_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);
}
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