Orange Pi5 kernel

^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   1) // SPDX-License-Identifier: GPL-2.0-only
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   2) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   3)  * genelf.c
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   4)  * Copyright (C) 2014, Google, Inc
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   5)  *
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   6)  * Contributed by:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   7)  * 	Stephane Eranian <eranian@gmail.com>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   8)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300   9) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  10) #include <sys/types.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  11) #include <stddef.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  12) #include <libelf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  13) #include <string.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  14) #include <stdlib.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  15) #include <unistd.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  16) #include <inttypes.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  17) #include <fcntl.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  18) #include <err.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  19) #ifdef HAVE_DWARF_SUPPORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  20) #include <dwarf.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  21) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  22) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  23) #include "genelf.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  24) #include "../util/jitdump.h"
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  25) #include <linux/compiler.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  26) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  27) #ifndef NT_GNU_BUILD_ID
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  28) #define NT_GNU_BUILD_ID 3
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  29) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  30) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  31) #define BUILD_ID_URANDOM /* different uuid for each run */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  32) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  33) #ifdef HAVE_LIBCRYPTO
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  34) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  35) #define BUILD_ID_MD5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  36) #undef BUILD_ID_SHA	/* does not seem to work well when linked with Java */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  37) #undef BUILD_ID_URANDOM /* different uuid for each run */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  38) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  39) #ifdef BUILD_ID_SHA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  40) #include <openssl/sha.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  41) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  42) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  43) #ifdef BUILD_ID_MD5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  44) #include <openssl/md5.h>
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  45) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  46) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  47) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  48) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  49) typedef struct {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  50)   unsigned int namesz;  /* Size of entry's owner string */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  51)   unsigned int descsz;  /* Size of the note descriptor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  52)   unsigned int type;    /* Interpretation of the descriptor */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  53)   char         name[0]; /* Start of the name+desc data */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  54) } Elf_Note;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  55) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  56) struct options {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  57) 	char *output;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  58) 	int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  59) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  60) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  61) static char shd_string_table[] = {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  62) 	0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  63) 	'.', 't', 'e', 'x', 't', 0,			/*  1 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  64) 	'.', 's', 'h', 's', 't', 'r', 't', 'a', 'b', 0, /*  7 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  65) 	'.', 's', 'y', 'm', 't', 'a', 'b', 0,		/* 17 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  66) 	'.', 's', 't', 'r', 't', 'a', 'b', 0,		/* 25 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  67) 	'.', 'n', 'o', 't', 'e', '.', 'g', 'n', 'u', '.', 'b', 'u', 'i', 'l', 'd', '-', 'i', 'd', 0, /* 33 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  68) 	'.', 'd', 'e', 'b', 'u', 'g', '_', 'l', 'i', 'n', 'e', 0, /* 52 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  69) 	'.', 'd', 'e', 'b', 'u', 'g', '_', 'i', 'n', 'f', 'o', 0, /* 64 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  70) 	'.', 'd', 'e', 'b', 'u', 'g', '_', 'a', 'b', 'b', 'r', 'e', 'v', 0, /* 76 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  71) 	'.', 'e', 'h', '_', 'f', 'r', 'a', 'm', 'e', '_', 'h', 'd', 'r', 0, /* 90 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  72) 	'.', 'e', 'h', '_', 'f', 'r', 'a', 'm', 'e', 0, /* 104 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  73) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  74) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  75) static struct buildid_note {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  76) 	Elf_Note desc;		/* descsz: size of build-id, must be multiple of 4 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  77) 	char	 name[4];	/* GNU\0 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  78) 	char	 build_id[20];
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  79) } bnote;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  80) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  81) static Elf_Sym symtab[]={
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  82) 	/* symbol 0 MUST be the undefined symbol */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  83) 	{ .st_name  = 0, /* index in sym_string table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  84) 	  .st_info  = ELF_ST_TYPE(STT_NOTYPE),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  85) 	  .st_shndx = 0, /* for now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  86) 	  .st_value = 0x0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  87) 	  .st_other = ELF_ST_VIS(STV_DEFAULT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  88) 	  .st_size  = 0,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  89) 	},
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  90) 	{ .st_name  = 1, /* index in sym_string table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  91) 	  .st_info  = ELF_ST_BIND(STB_LOCAL) | ELF_ST_TYPE(STT_FUNC),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  92) 	  .st_shndx = 1,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  93) 	  .st_value = 0, /* for now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  94) 	  .st_other = ELF_ST_VIS(STV_DEFAULT),
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  95) 	  .st_size  = 0, /* for now */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  96) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  97) };
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  98) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300  99) #ifdef BUILD_ID_URANDOM
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 100) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 101) gen_build_id(struct buildid_note *note,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 102) 	     unsigned long load_addr __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 103) 	     const void *code __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 104) 	     size_t csize __maybe_unused)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 105) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 106) 	int fd;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 107) 	size_t sz = sizeof(note->build_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 108) 	ssize_t sret;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 109) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 110) 	fd = open("/dev/urandom", O_RDONLY);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 111) 	if (fd == -1)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 112) 		err(1, "cannot access /dev/urandom for buildid");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 113) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 114) 	sret = read(fd, note->build_id, sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 115) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 116) 	close(fd);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 117) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 118) 	if (sret != (ssize_t)sz)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 119) 		memset(note->build_id, 0, sz);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 120) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 121) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 122) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 123) #ifdef BUILD_ID_SHA
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 124) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 125) gen_build_id(struct buildid_note *note,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 126) 	     unsigned long load_addr __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 127) 	     const void *code,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 128) 	     size_t csize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 129) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 130) 	if (sizeof(note->build_id) < SHA_DIGEST_LENGTH)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 131) 		errx(1, "build_id too small for SHA1");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 132) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 133) 	SHA1(code, csize, (unsigned char *)note->build_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 134) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 135) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 136) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 137) #ifdef BUILD_ID_MD5
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 138) static void
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 139) gen_build_id(struct buildid_note *note, unsigned long load_addr, const void *code, size_t csize)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 140) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 141) 	MD5_CTX context;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 142) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 143) 	if (sizeof(note->build_id) < 16)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 144) 		errx(1, "build_id too small for MD5");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 145) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 146) 	MD5_Init(&context);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 147) 	MD5_Update(&context, &load_addr, sizeof(load_addr));
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 148) 	MD5_Update(&context, code, csize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 149) 	MD5_Final((unsigned char *)note->build_id, &context);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 150) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 151) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 152) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 153) static int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 154) jit_add_eh_frame_info(Elf *e, void* unwinding, uint64_t unwinding_header_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 155) 		      uint64_t unwinding_size, uint64_t base_offset)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 156) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 157) 	Elf_Data *d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 158) 	Elf_Scn *scn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 159) 	Elf_Shdr *shdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 160) 	uint64_t unwinding_table_size = unwinding_size - unwinding_header_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 161) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 162) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 163) 	 * setup eh_frame section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 164) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 165) 	scn = elf_newscn(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 166) 	if (!scn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 167) 		warnx("cannot create section");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 168) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 169) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 170) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 171) 	d = elf_newdata(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 172) 	if (!d) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 173) 		warnx("cannot get new data");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 174) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 175) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 176) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 177) 	d->d_align = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 178) 	d->d_off = 0LL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 179) 	d->d_buf = unwinding;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 180) 	d->d_type = ELF_T_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 181) 	d->d_size = unwinding_table_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 182) 	d->d_version = EV_CURRENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 183) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 184) 	shdr = elf_getshdr(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 185) 	if (!shdr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 186) 		warnx("cannot get section header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 187) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 188) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 189) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 190) 	shdr->sh_name = 104;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 191) 	shdr->sh_type = SHT_PROGBITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 192) 	shdr->sh_addr = base_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 193) 	shdr->sh_flags = SHF_ALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 194) 	shdr->sh_entsize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 195) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 196) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 197) 	 * setup eh_frame_hdr section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 198) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 199) 	scn = elf_newscn(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 200) 	if (!scn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 201) 		warnx("cannot create section");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 202) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 203) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 204) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 205) 	d = elf_newdata(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 206) 	if (!d) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 207) 		warnx("cannot get new data");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 208) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 209) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 210) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 211) 	d->d_align = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 212) 	d->d_off = 0LL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 213) 	d->d_buf = unwinding + unwinding_table_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 214) 	d->d_type = ELF_T_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 215) 	d->d_size = unwinding_header_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 216) 	d->d_version = EV_CURRENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 217) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 218) 	shdr = elf_getshdr(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 219) 	if (!shdr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 220) 		warnx("cannot get section header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 221) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 222) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 223) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 224) 	shdr->sh_name = 90;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 225) 	shdr->sh_type = SHT_PROGBITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 226) 	shdr->sh_addr = base_offset + unwinding_table_size;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 227) 	shdr->sh_flags = SHF_ALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 228) 	shdr->sh_entsize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 229) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 230) 	return 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 231) }
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 232) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 233) /*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 234)  * fd: file descriptor open for writing for the output file
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 235)  * load_addr: code load address (could be zero, just used for buildid)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 236)  * sym: function name (for native code - used as the symbol)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 237)  * code: the native code
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 238)  * csize: the code size in bytes
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 239)  */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 240) int
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 241) jit_write_elf(int fd, uint64_t load_addr, const char *sym,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 242) 	      const void *code, int csize,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 243) 	      void *debug __maybe_unused, int nr_debug_entries __maybe_unused,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 244) 	      void *unwinding, uint64_t unwinding_header_size, uint64_t unwinding_size)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 245) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 246) 	Elf *e;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 247) 	Elf_Data *d;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 248) 	Elf_Scn *scn;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 249) 	Elf_Ehdr *ehdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 250) 	Elf_Shdr *shdr;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 251) 	uint64_t eh_frame_base_offset;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 252) 	char *strsym = NULL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 253) 	int symlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 254) 	int retval = -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 255) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 256) 	if (elf_version(EV_CURRENT) == EV_NONE) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 257) 		warnx("ELF initialization failed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 258) 		return -1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 259) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 260) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 261) 	e = elf_begin(fd, ELF_C_WRITE, NULL);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 262) 	if (!e) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 263) 		warnx("elf_begin failed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 264) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 265) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 266) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 267) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 268) 	 * setup ELF header
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 269) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 270) 	ehdr = elf_newehdr(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 271) 	if (!ehdr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 272) 		warnx("cannot get ehdr");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 273) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 274) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 275) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 276) 	ehdr->e_ident[EI_DATA] = GEN_ELF_ENDIAN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 277) 	ehdr->e_ident[EI_CLASS] = GEN_ELF_CLASS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 278) 	ehdr->e_machine = GEN_ELF_ARCH;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 279) 	ehdr->e_type = ET_DYN;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 280) 	ehdr->e_entry = GEN_ELF_TEXT_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 281) 	ehdr->e_version = EV_CURRENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 282) 	ehdr->e_shstrndx= unwinding ? 4 : 2; /* shdr index for section name */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 283) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 284) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 285) 	 * setup text section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 286) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 287) 	scn = elf_newscn(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 288) 	if (!scn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 289) 		warnx("cannot create section");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 290) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 291) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 292) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 293) 	d = elf_newdata(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 294) 	if (!d) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 295) 		warnx("cannot get new data");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 296) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 297) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 298) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 299) 	d->d_align = 16;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 300) 	d->d_off = 0LL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 301) 	d->d_buf = (void *)code;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 302) 	d->d_type = ELF_T_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 303) 	d->d_size = csize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 304) 	d->d_version = EV_CURRENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 305) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 306) 	shdr = elf_getshdr(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 307) 	if (!shdr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 308) 		warnx("cannot get section header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 309) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 310) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 311) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 312) 	shdr->sh_name = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 313) 	shdr->sh_type = SHT_PROGBITS;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 314) 	shdr->sh_addr = GEN_ELF_TEXT_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 315) 	shdr->sh_flags = SHF_EXECINSTR | SHF_ALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 316) 	shdr->sh_entsize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 317) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 318) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 319) 	 * Setup .eh_frame_hdr and .eh_frame
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 320) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 321) 	if (unwinding) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 322) 		eh_frame_base_offset = ALIGN_8(GEN_ELF_TEXT_OFFSET + csize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 323) 		retval = jit_add_eh_frame_info(e, unwinding,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 324) 					       unwinding_header_size, unwinding_size,
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 325) 					       eh_frame_base_offset);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 326) 		if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 327) 			goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 328) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 329) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 330) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 331) 	 * setup section headers string table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 332) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 333) 	scn = elf_newscn(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 334) 	if (!scn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 335) 		warnx("cannot create section");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 336) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 337) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 338) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 339) 	d = elf_newdata(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 340) 	if (!d) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 341) 		warnx("cannot get new data");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 342) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 343) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 344) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 345) 	d->d_align = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 346) 	d->d_off = 0LL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 347) 	d->d_buf = shd_string_table;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 348) 	d->d_type = ELF_T_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 349) 	d->d_size = sizeof(shd_string_table);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 350) 	d->d_version = EV_CURRENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 351) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 352) 	shdr = elf_getshdr(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 353) 	if (!shdr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 354) 		warnx("cannot get section header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 355) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 356) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 357) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 358) 	shdr->sh_name = 7; /* offset of '.shstrtab' in shd_string_table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 359) 	shdr->sh_type = SHT_STRTAB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 360) 	shdr->sh_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 361) 	shdr->sh_entsize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 362) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 363) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 364) 	 * setup symtab section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 365) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 366) 	symtab[1].st_size  = csize;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 367) 	symtab[1].st_value = GEN_ELF_TEXT_OFFSET;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 368) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 369) 	scn = elf_newscn(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 370) 	if (!scn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 371) 		warnx("cannot create section");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 372) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 373) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 374) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 375) 	d = elf_newdata(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 376) 	if (!d) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 377) 		warnx("cannot get new data");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 378) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 379) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 380) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 381) 	d->d_align = 8;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 382) 	d->d_off = 0LL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 383) 	d->d_buf = symtab;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 384) 	d->d_type = ELF_T_SYM;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 385) 	d->d_size = sizeof(symtab);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 386) 	d->d_version = EV_CURRENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 387) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 388) 	shdr = elf_getshdr(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 389) 	if (!shdr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 390) 		warnx("cannot get section header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 391) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 392) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 393) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 394) 	shdr->sh_name = 17; /* offset of '.symtab' in shd_string_table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 395) 	shdr->sh_type = SHT_SYMTAB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 396) 	shdr->sh_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 397) 	shdr->sh_entsize = sizeof(Elf_Sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 398) 	shdr->sh_link = unwinding ? 6 : 4; /* index of .strtab section */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 399) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 400) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 401) 	 * setup symbols string table
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 402) 	 * 2 = 1 for 0 in 1st entry, 1 for the 0 at end of symbol for 2nd entry
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 403) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 404) 	symlen = 2 + strlen(sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 405) 	strsym = calloc(1, symlen);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 406) 	if (!strsym) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 407) 		warnx("cannot allocate strsym");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 408) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 409) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 410) 	strcpy(strsym + 1, sym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 411) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 412) 	scn = elf_newscn(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 413) 	if (!scn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 414) 		warnx("cannot create section");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 415) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 416) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 417) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 418) 	d = elf_newdata(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 419) 	if (!d) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 420) 		warnx("cannot get new data");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 421) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 422) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 423) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 424) 	d->d_align = 1;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 425) 	d->d_off = 0LL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 426) 	d->d_buf = strsym;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 427) 	d->d_type = ELF_T_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 428) 	d->d_size = symlen;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 429) 	d->d_version = EV_CURRENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 430) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 431) 	shdr = elf_getshdr(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 432) 	if (!shdr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 433) 		warnx("cannot get section header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 434) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 435) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 436) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 437) 	shdr->sh_name = 25; /* offset in shd_string_table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 438) 	shdr->sh_type = SHT_STRTAB;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 439) 	shdr->sh_flags = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 440) 	shdr->sh_entsize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 441) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 442) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 443) 	 * setup build-id section
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 444) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 445) 	scn = elf_newscn(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 446) 	if (!scn) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 447) 		warnx("cannot create section");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 448) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 449) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 450) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 451) 	d = elf_newdata(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 452) 	if (!d) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 453) 		warnx("cannot get new data");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 454) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 455) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 456) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 457) 	/*
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 458) 	 * build-id generation
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 459) 	 */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 460) 	gen_build_id(&bnote, load_addr, code, csize);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 461) 	bnote.desc.namesz = sizeof(bnote.name); /* must include 0 termination */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 462) 	bnote.desc.descsz = sizeof(bnote.build_id);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 463) 	bnote.desc.type   = NT_GNU_BUILD_ID;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 464) 	strcpy(bnote.name, "GNU");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 465) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 466) 	d->d_align = 4;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 467) 	d->d_off = 0LL;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 468) 	d->d_buf = &bnote;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 469) 	d->d_type = ELF_T_BYTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 470) 	d->d_size = sizeof(bnote);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 471) 	d->d_version = EV_CURRENT;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 472) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 473) 	shdr = elf_getshdr(scn);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 474) 	if (!shdr) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 475) 		warnx("cannot get section header");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 476) 		goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 477) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 478) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 479) 	shdr->sh_name = 33; /* offset in shd_string_table */
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 480) 	shdr->sh_type = SHT_NOTE;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 481) 	shdr->sh_addr = 0x0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 482) 	shdr->sh_flags = SHF_ALLOC;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 483) 	shdr->sh_size = sizeof(bnote);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 484) 	shdr->sh_entsize = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 485) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 486) #ifdef HAVE_DWARF_SUPPORT
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 487) 	if (debug && nr_debug_entries) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 488) 		retval = jit_add_debug_info(e, load_addr, debug, nr_debug_entries);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 489) 		if (retval)
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 490) 			goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 491) 	} else
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 492) #endif
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 493) 	{
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 494) 		if (elf_update(e, ELF_C_WRITE) < 0) {
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 495) 			warnx("elf_update 4 failed");
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 496) 			goto error;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 497) 		}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 498) 	}
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 499) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 500) 	retval = 0;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 501) error:
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 502) 	(void)elf_end(e);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 503) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 504) 	free(strsym);
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 505) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 506) 
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 507) 	return retval;
^8f3ce5b39 (kx 2023-10-28 12:00:06 +0300 508) }