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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 <stdlib.h>
#include <stdio.h>
#include <string.h>
#include <errno.h>
#include <mdso/mdso_specs.h>
#include <mdso/mdso_structs.h>
#include <perk/perk.h>
#include <perk/perk_consts.h>
#include <perk/perk_output.h>
#include "perk_reader_impl.h"
#include "perk_driver_impl.h"
#include "perk_dprintf_impl.h"
#include "perk_errinfo_impl.h"
static int pretty_header(
int fdout,
const struct pe_common_ctx * cctx)
{
return (cctx->fmtflags & PERK_PRETTY_YAML)
? pe_dprintf(fdout,"dsolibs:\n")
: 0;
}
static int pretty_dsolib_header(
int fdout,
const struct pe_common_ctx * cctx,
const char * name)
{
if ((cctx->fmtflags & PERK_PRETTY_YAML) && (cctx->fmtflags & PERK_OUTPUT_MDSO_SYMS))
return pe_dprintf(fdout," %s:\n",name);
else if (cctx->fmtflags & PERK_PRETTY_YAML)
return pe_dprintf(fdout,"- %s:\n",name);
else if (cctx->fmtflags & PERK_OUTPUT_MDSO_SYMS)
return pe_dprintf(fdout,"%s:\n",name);
else
return pe_dprintf(fdout,"%s\n",name);
}
static int pretty_dsolib_item(
int fdout,
const struct pe_common_ctx * cctx,
const char * name)
{
if (cctx->fmtflags & PERK_PRETTY_YAML)
return pe_dprintf(fdout," - %s\n",name);
else
return pe_dprintf(fdout,"%s\n",name);
}
static unsigned char * dsolib_meta(const struct pe_image_meta * m, int i)
{
struct mdso_raw_meta_record_m32 * mdso32;
struct mdso_raw_meta_record_m64 * mdso64;
if (m->m_opt.oh_std.coh_magic == PE_MAGIC_PE32_PLUS) {
mdso64 = (struct mdso_raw_meta_record_m64 *)m->r_dsometa + i;
return mdso64->mrec_base;
} else {
mdso32 = (struct mdso_raw_meta_record_m32 *)m->r_dsometa + i;
return mdso32->mrec_base;
}
}
static char * dsolib_name(const struct pe_image_meta * m, int i)
{
uintptr_t va;
uint64_t rva;
char * addr;
uint32_t roffset;
struct mdso_raw_meta_record_m32 * mdso32;
struct mdso_raw_meta_record_m64 * mdso64;
if (m->m_opt.oh_std.coh_magic == PE_MAGIC_PE32_PLUS) {
mdso64 = (struct mdso_raw_meta_record_m64 *)m->r_dsometa + i;
va = pe_read_quad(mdso64->mrec_name);
rva = va - m->m_opt.oh_mem.coh_image_base;
if (rva >> 32)
return 0;
} else {
mdso32 = (struct mdso_raw_meta_record_m32 *)m->r_dsometa + i;
va = pe_read_long(mdso32->mrec_name);
rva = va - m->m_opt.oh_mem.coh_image_base;
}
if (pe_get_roffset_from_rva(m,(uint32_t)rva,&roffset) < 0)
return 0;
return (addr = m->r_image.map_addr) + roffset;
}
static unsigned char * dsosym_meta(const struct pe_image_meta * m, int j)
{
uint64_t va;
uint32_t rva;
uint32_t roffset;
struct mdso_raw_sym_entry_m32 * sym32;
struct mdso_raw_sym_entry_m64 * sym64;
int idx;
if (m->m_opt.oh_std.coh_magic == PE_MAGIC_PE32_PLUS) {
sym64 = (struct mdso_raw_sym_entry_m64 *)m->r_dsosyms + j;
va = pe_read_quad(sym64->msym_meta);
rva = pe_read_long(sym64->msym_meta);
} else {
sym32 = (struct mdso_raw_sym_entry_m32 *)m->r_dsosyms + j;
va = pe_read_long(sym32->msym_meta);
rva = va;
}
if ((idx = pe_get_named_section_index(m,MDSO_META_SECTION)) >= 0)
if (idx != pe_get_block_section_index(m,&(struct pe_block){rva,0}))
return (unsigned char *)(-1);
if (va > rva)
return 0;
if (pe_get_roffset_from_rva(m,rva,&roffset) < 0)
return 0;
return (unsigned char *)m->r_image.map_addr + roffset;
}
static char * dsosym_string(const struct pe_image_meta * m, int j)
{
uint64_t va;
uint32_t rva;
char * addr;
uint32_t roffset;
struct mdso_raw_sym_entry_m32 * sym32;
struct mdso_raw_sym_entry_m64 * sym64;
int idx;
if (m->m_opt.oh_std.coh_magic == PE_MAGIC_PE32_PLUS) {
sym64 = (struct mdso_raw_sym_entry_m64 *)m->r_dsosyms + j;
va = pe_read_quad(sym64->msym_string);
rva = pe_read_long(sym64->msym_string);
} else {
sym32 = (struct mdso_raw_sym_entry_m32 *)m->r_dsosyms + j;
va = pe_read_long(sym32->msym_string);
rva = va;
}
if ((idx = pe_get_named_section_index(m,MDSO_STRS_SECTION)) >= 0)
if (idx != pe_get_block_section_index(m,&(struct pe_block){rva,0}))
return (char *)(-2);
if (va > rva)
return 0;
if (pe_get_roffset_from_rva(m,rva,&roffset) < 0)
return 0;
return (addr = m->r_image.map_addr) + roffset;
}
int pe_output_mdso_libraries(
const struct pe_driver_ctx * dctx,
const struct pe_image_meta * m)
{
int i,j;
int fdout;
char * name;
unsigned char * symmeta;
unsigned char * dsometa;
char * symstr;
const struct pe_common_ctx * cctx = dctx->cctx;
fdout = pe_driver_fdout(dctx);
if (!m->m_stats.t_ndsolibs)
return 0;
if (pe_get_image_abi(m,0) == PE_ABI_UNSUPPORTED)
return PERK_CUSTOM_ERROR(
dctx,PERK_ERR_UNSUPPORTED_ABI);
if ((pretty_header(fdout,cctx)) < 0)
return PERK_FILE_ERROR(dctx);
for (i=0; i<m->m_stats.t_ndsolibs; i++) {
dsometa = dsolib_meta(m,i);
if (!(name = dsolib_name(m,i)))
return PERK_CUSTOM_ERROR(
dctx,PERK_ERR_IMAGE_MALFORMED);
if ((pretty_dsolib_header(fdout,cctx,name)) < 0)
return PERK_FILE_ERROR(dctx);
if (cctx->fmtflags & PERK_OUTPUT_MDSO_SYMS) {
for (j=0; j<m->m_stats.t_ndsosyms; j++) {
if (!(symmeta = dsosym_meta(m,j)))
return PERK_CUSTOM_ERROR(
dctx,PERK_ERR_IMAGE_MALFORMED);
if (!(symstr = dsosym_string(m,j)))
return PERK_CUSTOM_ERROR(
dctx,PERK_ERR_IMAGE_MALFORMED);
if (symmeta == dsometa)
if ((pretty_dsolib_item(fdout,cctx,symstr)) < 0)
return PERK_FILE_ERROR(dctx);
}
}
}
return 0;
}
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