102c801a5SLawrence Tang /** 2efe17e2cSLawrence Tang * Describes functions for generating pseudo-random specification compliant CPER records. 302c801a5SLawrence Tang * 402c801a5SLawrence Tang * Author: Lawrence.Tang@arm.com 502c801a5SLawrence Tang **/ 602c801a5SLawrence Tang 702c801a5SLawrence Tang #include <stdio.h> 802c801a5SLawrence Tang #include <stdlib.h> 902c801a5SLawrence Tang #include <string.h> 1002c801a5SLawrence Tang #include "../edk/Cper.h" 1102c801a5SLawrence Tang #include "gen-utils.h" 12*8f977457SLawrence Tang #include "sections/gen-section.h" 13d34f2b11SLawrence Tang #include "cper-generate.h" 1402c801a5SLawrence Tang 15e407b4c8SLawrence Tang EFI_ERROR_SECTION_DESCRIPTOR *generate_section_descriptor(char *type, 16e407b4c8SLawrence Tang size_t *lengths, 17e407b4c8SLawrence Tang int index, 18e407b4c8SLawrence Tang int num_sections); 1902c801a5SLawrence Tang size_t generate_section(void **location, char *type); 2002c801a5SLawrence Tang 21d34f2b11SLawrence Tang //Generates a CPER record with the given section types, outputting to the given stream. 22d34f2b11SLawrence Tang void generate_cper_record(char **types, UINT16 num_sections, FILE *out) 2302c801a5SLawrence Tang { 2402c801a5SLawrence Tang //Initialise randomiser. 2502c801a5SLawrence Tang init_random(); 2602c801a5SLawrence Tang 27d34f2b11SLawrence Tang //Generate the sections. 2802c801a5SLawrence Tang void *sections[num_sections]; 2902c801a5SLawrence Tang size_t section_lengths[num_sections]; 30e407b4c8SLawrence Tang for (int i = 0; i < num_sections; i++) { 31d34f2b11SLawrence Tang section_lengths[i] = generate_section(sections + i, types[i]); 32e407b4c8SLawrence Tang if (section_lengths[i] == 0) { 3302c801a5SLawrence Tang //Error encountered, exit. 34e407b4c8SLawrence Tang printf("Error encountered generating section %d of type '%s', length returned zero.\n", 35e407b4c8SLawrence Tang i + 1, types[i]); 36d34f2b11SLawrence Tang return; 3702c801a5SLawrence Tang } 3802c801a5SLawrence Tang } 3902c801a5SLawrence Tang 4002c801a5SLawrence Tang //Generate the header given the number of sections. 4102c801a5SLawrence Tang EFI_COMMON_ERROR_RECORD_HEADER *header = 42e407b4c8SLawrence Tang (EFI_COMMON_ERROR_RECORD_HEADER *)calloc( 43e407b4c8SLawrence Tang 1, sizeof(EFI_COMMON_ERROR_RECORD_HEADER)); 4402c801a5SLawrence Tang header->SignatureStart = 0x52455043; //CPER 4502c801a5SLawrence Tang header->SectionCount = num_sections; 4602c801a5SLawrence Tang header->SignatureEnd = 0xFFFFFFFF; 4702c801a5SLawrence Tang header->Flags = 4; //HW_ERROR_FLAGS_SIMULATED 4867cbed6bSLawrence Tang header->RecordID = (UINT64)rand(); 4967cbed6bSLawrence Tang header->ErrorSeverity = rand() % 4; 50aacf0e26SLawrence Tang 51aacf0e26SLawrence Tang //Generate a valid timestamp. 52aacf0e26SLawrence Tang header->TimeStamp.Century = int_to_bcd(rand() % 100); 53aacf0e26SLawrence Tang header->TimeStamp.Year = int_to_bcd(rand() % 100); 54aacf0e26SLawrence Tang header->TimeStamp.Month = int_to_bcd(rand() % 12 + 1); 55aacf0e26SLawrence Tang header->TimeStamp.Day = int_to_bcd(rand() % 31 + 1); 56aacf0e26SLawrence Tang header->TimeStamp.Hours = int_to_bcd(rand() % 24 + 1); 57aacf0e26SLawrence Tang header->TimeStamp.Seconds = int_to_bcd(rand() % 60); 58aacf0e26SLawrence Tang 59aacf0e26SLawrence Tang //Turn all validation bits on. 60aacf0e26SLawrence Tang header->ValidationBits = 0b11; 6102c801a5SLawrence Tang 6202c801a5SLawrence Tang //Generate the section descriptors given the number of sections. 6302c801a5SLawrence Tang EFI_ERROR_SECTION_DESCRIPTOR *section_descriptors[num_sections]; 6402c801a5SLawrence Tang for (int i = 0; i < num_sections; i++) 65e407b4c8SLawrence Tang section_descriptors[i] = generate_section_descriptor( 66e407b4c8SLawrence Tang types[i], section_lengths, i, num_sections); 6702c801a5SLawrence Tang 6802c801a5SLawrence Tang //Calculate total length of structure, set in header. 6967cbed6bSLawrence Tang size_t total_len = sizeof(EFI_COMMON_ERROR_RECORD_HEADER); 7002c801a5SLawrence Tang for (int i = 0; i < num_sections; i++) 7102c801a5SLawrence Tang total_len += section_lengths[i]; 7202c801a5SLawrence Tang total_len += num_sections * sizeof(EFI_ERROR_SECTION_DESCRIPTOR); 7302c801a5SLawrence Tang header->RecordLength = (UINT32)total_len; 7402c801a5SLawrence Tang 75d34f2b11SLawrence Tang //Write to stream in order, free all resources. 76d34f2b11SLawrence Tang fwrite(header, sizeof(EFI_COMMON_ERROR_RECORD_HEADER), 1, out); 77d34f2b11SLawrence Tang fflush(out); 7802c801a5SLawrence Tang free(header); 79e407b4c8SLawrence Tang for (int i = 0; i < num_sections; i++) { 80e407b4c8SLawrence Tang fwrite(section_descriptors[i], 81e407b4c8SLawrence Tang sizeof(EFI_ERROR_SECTION_DESCRIPTOR), 1, out); 82d34f2b11SLawrence Tang fflush(out); 8302c801a5SLawrence Tang free(section_descriptors[i]); 8402c801a5SLawrence Tang } 85e407b4c8SLawrence Tang for (int i = 0; i < num_sections; i++) { 86d34f2b11SLawrence Tang fwrite(sections[i], section_lengths[i], 1, out); 87d34f2b11SLawrence Tang fflush(out); 8802c801a5SLawrence Tang free(sections[i]); 8902c801a5SLawrence Tang } 9002c801a5SLawrence Tang } 9102c801a5SLawrence Tang 92617949e4SLawrence Tang //Generates a single section record for the given section, and outputs to file. 93617949e4SLawrence Tang void generate_single_section_record(char *type, FILE *out) 94617949e4SLawrence Tang { 95617949e4SLawrence Tang //Generate a section. 96617949e4SLawrence Tang void *section; 97617949e4SLawrence Tang size_t section_len = generate_section(§ion, type); 98617949e4SLawrence Tang 99617949e4SLawrence Tang //Generate a descriptor, correct the offset. 100617949e4SLawrence Tang EFI_ERROR_SECTION_DESCRIPTOR *section_descriptor = 101617949e4SLawrence Tang generate_section_descriptor(type, §ion_len, 0, 1); 102617949e4SLawrence Tang section_descriptor->SectionOffset = 103617949e4SLawrence Tang sizeof(EFI_ERROR_SECTION_DESCRIPTOR); 104617949e4SLawrence Tang 105617949e4SLawrence Tang //Write all to file. 106617949e4SLawrence Tang fwrite(section_descriptor, sizeof(EFI_ERROR_SECTION_DESCRIPTOR), 1, 107617949e4SLawrence Tang out); 108617949e4SLawrence Tang fwrite(section, section_len, 1, out); 109617949e4SLawrence Tang fflush(out); 110617949e4SLawrence Tang 111617949e4SLawrence Tang //Free remaining resources. 112617949e4SLawrence Tang free(section_descriptor); 113617949e4SLawrence Tang } 114617949e4SLawrence Tang 11502c801a5SLawrence Tang //Generates a single section descriptor for a section with the given properties. 116e407b4c8SLawrence Tang EFI_ERROR_SECTION_DESCRIPTOR *generate_section_descriptor(char *type, 117e407b4c8SLawrence Tang size_t *lengths, 118e407b4c8SLawrence Tang int index, 119e407b4c8SLawrence Tang int num_sections) 12002c801a5SLawrence Tang { 12102c801a5SLawrence Tang EFI_ERROR_SECTION_DESCRIPTOR *descriptor = 122e407b4c8SLawrence Tang (EFI_ERROR_SECTION_DESCRIPTOR *)generate_random_bytes( 123e407b4c8SLawrence Tang sizeof(EFI_ERROR_SECTION_DESCRIPTOR)); 12402c801a5SLawrence Tang 12502c801a5SLawrence Tang //Set reserved bits to zero. 12602c801a5SLawrence Tang descriptor->Resv1 = 0; 12702c801a5SLawrence Tang descriptor->SectionFlags &= 0xFF; 12802c801a5SLawrence Tang 129aacf0e26SLawrence Tang //Validation bits all set to 'on'. 130aacf0e26SLawrence Tang descriptor->SecValidMask = 0b11; 131aacf0e26SLawrence Tang 132d34f2b11SLawrence Tang //Set severity. 133d34f2b11SLawrence Tang descriptor->Severity = rand() % 4; 134d34f2b11SLawrence Tang 13502c801a5SLawrence Tang //Set length, offset from base record. 13602c801a5SLawrence Tang descriptor->SectionLength = (UINT32)lengths[index]; 137e407b4c8SLawrence Tang descriptor->SectionOffset = 138e407b4c8SLawrence Tang sizeof(EFI_COMMON_ERROR_RECORD_HEADER) + 139e407b4c8SLawrence Tang (num_sections * sizeof(EFI_ERROR_SECTION_DESCRIPTOR)); 14002c801a5SLawrence Tang for (int i = 0; i < index; i++) 14102c801a5SLawrence Tang descriptor->SectionOffset += lengths[i]; 14202c801a5SLawrence Tang 143aacf0e26SLawrence Tang //Ensure the FRU text is not null terminated early. 144e407b4c8SLawrence Tang for (int i = 0; i < 20; i++) { 14501e3a44dSLawrence Tang if (descriptor->FruString[i] == 0x0) 146aacf0e26SLawrence Tang descriptor->FruString[i] = rand() % 127 + 1; 147aacf0e26SLawrence Tang 148aacf0e26SLawrence Tang //Null terminate last byte. 149aacf0e26SLawrence Tang if (i == 19) 150aacf0e26SLawrence Tang descriptor->FruString[i] = 0x0; 151aacf0e26SLawrence Tang } 152aacf0e26SLawrence Tang 153*8f977457SLawrence Tang //If section type is not "unknown", set section type GUID based on type name. 154*8f977457SLawrence Tang int section_guid_found = 0; 155*8f977457SLawrence Tang if (strcmp(type, "unknown") == 0) { 156*8f977457SLawrence Tang section_guid_found = 1; 157*8f977457SLawrence Tang } else { 158*8f977457SLawrence Tang //Find the appropriate GUID for this section name. 159*8f977457SLawrence Tang for (int i = 0; i < generator_definitions_len; i++) { 160*8f977457SLawrence Tang if (strcmp(type, generator_definitions[i].ShortName) == 161*8f977457SLawrence Tang 0) { 162e407b4c8SLawrence Tang memcpy(&descriptor->SectionType, 163*8f977457SLawrence Tang generator_definitions[i].Guid, 164e407b4c8SLawrence Tang sizeof(EFI_GUID)); 165*8f977457SLawrence Tang section_guid_found = 1; 16602c801a5SLawrence Tang break; 16702c801a5SLawrence Tang } 168*8f977457SLawrence Tang } 169*8f977457SLawrence Tang } 170*8f977457SLawrence Tang 171*8f977457SLawrence Tang //Undefined section, show error. 172*8f977457SLawrence Tang if (!section_guid_found) { 17302c801a5SLawrence Tang //Undefined section, show error. 174e407b4c8SLawrence Tang printf("Undefined section type '%s' provided. See 'cper-generate --help' for command information.\n", 175e407b4c8SLawrence Tang type); 17602c801a5SLawrence Tang return 0; 17702c801a5SLawrence Tang } 17802c801a5SLawrence Tang 17902c801a5SLawrence Tang return descriptor; 18002c801a5SLawrence Tang } 18102c801a5SLawrence Tang 18202c801a5SLawrence Tang //Generates a single CPER section given the string type. 18302c801a5SLawrence Tang size_t generate_section(void **location, char *type) 18402c801a5SLawrence Tang { 18502c801a5SLawrence Tang //The length of the section. 18602c801a5SLawrence Tang size_t length = 0; 18702c801a5SLawrence Tang 188*8f977457SLawrence Tang //If the section name is "unknown", simply generate a random bytes section. 189*8f977457SLawrence Tang int section_generated = 0; 190*8f977457SLawrence Tang if (strcmp(type, "unknown") == 0) { 191de9707f9SLawrence Tang length = generate_random_section(location, rand() % 256); 192*8f977457SLawrence Tang section_generated = 1; 193*8f977457SLawrence Tang } else { 194*8f977457SLawrence Tang //Function defined section, switch on the type, generate accordingly. 195*8f977457SLawrence Tang for (int i = 0; i < generator_definitions_len; i++) { 196*8f977457SLawrence Tang if (strcmp(type, generator_definitions[i].ShortName) == 197*8f977457SLawrence Tang 0) { 198*8f977457SLawrence Tang length = generator_definitions[i].Generate( 199*8f977457SLawrence Tang location); 200*8f977457SLawrence Tang section_generated = 1; 201*8f977457SLawrence Tang break; 202*8f977457SLawrence Tang } 203*8f977457SLawrence Tang } 204*8f977457SLawrence Tang } 205*8f977457SLawrence Tang 206*8f977457SLawrence Tang //If we didn't find a section generator for the given name, error out. 207*8f977457SLawrence Tang if (!section_generated) { 208e407b4c8SLawrence Tang printf("Undefined section type '%s' given to generate. See 'cper-generate --help' for command information.\n", 209e407b4c8SLawrence Tang type); 21002c801a5SLawrence Tang return 0; 21102c801a5SLawrence Tang } 21202c801a5SLawrence Tang 21302c801a5SLawrence Tang return length; 21402c801a5SLawrence Tang }