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2023-12-09 b22da3d8526a935aa31e086e63f60ff3246cb61c

 kernel/tools/perf/util/genelf.c
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@@ -1,41 +1,40 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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 /*
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  * genelf.c
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  * Copyright (C) 2014, Google, Inc
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  *
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  * Contributed by:
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  * 	Stephane Eranian <eranian@gmail.com>
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- *
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- * Released under the GPL v2. (and only v2, not any later version)
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  */
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 #include <sys/types.h>
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-#include <stdio.h>
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-#include <getopt.h>
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 #include <stddef.h>
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 #include <libelf.h>
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 #include <string.h>
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 #include <stdlib.h>
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+#include <unistd.h>
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 #include <inttypes.h>
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-#include <limits.h>
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 #include <fcntl.h>
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 #include <err.h>
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 #ifdef HAVE_DWARF_SUPPORT
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 #include <dwarf.h>
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 #endif
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-#include "perf.h"
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 #include "genelf.h"
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 #include "../util/jitdump.h"
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+#include <linux/compiler.h>
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 #ifndef NT_GNU_BUILD_ID
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 #define NT_GNU_BUILD_ID 3
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 #endif
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-#define JVMTI
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-
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 #define BUILD_ID_URANDOM /* different uuid for each run */
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-#ifdef HAVE_LIBCRYPTO
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+// FIXME, remove this and fix the deprecation warnings before its removed and
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+// We'll break for good here...
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+#pragma GCC diagnostic ignored "-Wdeprecated-declarations"
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+
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+#ifdef HAVE_LIBCRYPTO_SUPPORT
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 #define BUILD_ID_MD5
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 #undef BUILD_ID_SHA	/* does not seem to work well when linked with Java */
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@@ -252,6 +251,7 @@
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 	Elf_Data *d;
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 	Elf_Scn *scn;
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 	Elf_Ehdr *ehdr;
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+	Elf_Phdr *phdr;
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 	Elf_Shdr *shdr;
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 	uint64_t eh_frame_base_offset;
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 	char *strsym = NULL;
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@@ -285,6 +285,19 @@
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 	ehdr->e_entry = GEN_ELF_TEXT_OFFSET;
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 	ehdr->e_version = EV_CURRENT;
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 	ehdr->e_shstrndx= unwinding ? 4 : 2; /* shdr index for section name */
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+
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+	/*
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+	 * setup program header
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+	 */
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+	phdr = elf_newphdr(e, 1);
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+	phdr[0].p_type = PT_LOAD;
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+	phdr[0].p_offset = 0;
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+	phdr[0].p_vaddr = 0;
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+	phdr[0].p_paddr = 0;
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+	phdr[0].p_filesz = csize;
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+	phdr[0].p_memsz = csize;
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+	phdr[0].p_flags = PF_X | PF_R;
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+	phdr[0].p_align = 8;
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 	/*
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 	 * setup text section
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@@ -511,44 +524,3 @@
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 	return retval;
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 }
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-
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-#ifndef JVMTI
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-
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-static unsigned char x86_code[] = {
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-    0xBB, 0x2A, 0x00, 0x00, 0x00, /* movl $42, %ebx */
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-    0xB8, 0x01, 0x00, 0x00, 0x00, /* movl $1, %eax */
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-    0xCD, 0x80            /* int $0x80 */
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-};
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-
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-static struct options options;
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-
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-int main(int argc, char **argv)
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-{
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-	int c, fd, ret;
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-
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-	while ((c = getopt(argc, argv, "o:h")) != -1) {
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-		switch (c) {
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-		case 'o':
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-			options.output = optarg;
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-			break;
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-		case 'h':
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-			printf("Usage: genelf -o output_file [-h]\n");
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-			return 0;
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-		default:
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-			errx(1, "unknown option");
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-		}
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-	}
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-
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-	fd = open(options.output, O_CREAT|O_TRUNC|O_RDWR, 0666);
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-	if (fd == -1)
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-		err(1, "cannot create file %s", options.output);
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-
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-	ret = jit_write_elf(fd, "main", x86_code, sizeof(x86_code));
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-	close(fd);
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-
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-	if (ret != 0)
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-		unlink(options.output);
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-
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-	return ret;
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-}
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-#endif