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| #include <stdint.h> |
| #include <stddef.h> |
| #include <stdlib.h> |
| #include <string.h> |
| #include <sys/mman.h> |
| |
| #include <perk/perk.h> |
| #include "perk_driver_impl.h" |
| #include "perk_errinfo_impl.h" |
| |
| static int pe_free_unit_ctx_impl(struct pe_unit_ctx_impl * ctx, int ret) |
| { |
| if (ctx) { |
| pe_free_image_meta(ctx->meta); |
| pe_unmap_raw_image(&ctx->map); |
| free(ctx); |
| } |
| |
| return ret; |
| } |
| |
| int pe_get_unit_ctx( |
| const struct pe_driver_ctx * dctx, |
| const char * path, |
| struct pe_unit_ctx ** pctx) |
| { |
| struct pe_unit_ctx_impl * ctx; |
| int prot; |
| |
| if (!dctx) |
| return PERK_CUSTOM_ERROR( |
| dctx,PERK_ERR_NULL_CONTEXT); |
| |
| else if (!(ctx = calloc(1,sizeof(*ctx)))) |
| return PERK_BUFFER_ERROR(dctx); |
| |
| pe_driver_set_ectx( |
| dctx,0,path); |
| |
| prot = (dctx->cctx->actflags & PERK_ACTION_MAP_READWRITE) |
| ? PROT_READ | PROT_WRITE |
| : PROT_READ; |
| |
| if (pe_map_raw_image(dctx,dctx->cctx->ioctx->fdin,path,prot,&ctx->map)) |
| return pe_free_unit_ctx_impl(ctx, |
| PERK_NESTED_ERROR(dctx)); |
| |
| if (pe_get_image_meta(dctx,&ctx->map,&ctx->meta)) |
| return pe_free_unit_ctx_impl(ctx, |
| PERK_NESTED_ERROR(dctx)); |
| |
| ctx->path = path; |
| ctx->ioctx.prot = prot; |
| |
| ctx->uctx.path = &ctx->path; |
| ctx->uctx.map = &ctx->map; |
| ctx->uctx.meta = ctx->meta; |
| |
| *pctx = &ctx->uctx; |
| return 0; |
| } |
| |
| void pe_free_unit_ctx(struct pe_unit_ctx * ctx) |
| { |
| struct pe_unit_ctx_impl * ictx; |
| uintptr_t addr; |
| |
| if (ctx) { |
| addr = (uintptr_t)ctx - offsetof(struct pe_unit_ctx_impl,uctx); |
| ictx = (struct pe_unit_ctx_impl *)addr; |
| pe_free_unit_ctx_impl(ictx,0); |
| } |
| } |