summaryrefslogtreecommitdiff
path: root/tools
diff options
context:
space:
mode:
authorLieven Hey <lieven.hey@kdab.com>2022-09-15 12:29:10 +0300
committerArnaldo Carvalho de Melo <acme@redhat.com>2022-09-21 16:30:55 +0300
commitbabd04386b1df8c364cdaa39ac0e54349502e1e5 (patch)
tree3f7b902bf91f71ee36a59692e9d73e4f6b1a83ec /tools
parent7901086014bbaa3aeabcf060e0bbad6220427a3b (diff)
downloadlinux-babd04386b1df8c364cdaa39ac0e54349502e1e5.tar.xz
perf jit: Include program header in ELF files
The missing header makes it hard for programs like elfutils to open these files. Fixes: 2d86612aacb7805f ("perf symbol: Correct address for bss symbols") Reviewed-by: Leo Yan <leo.yan@linaro.org> Signed-off-by: Lieven Hey <lieven.hey@kdab.com> Tested-by: Leo Yan <leo.yan@linaro.org> Cc: Leo Yan <leo.yan@linaro.org> Link: https://lore.kernel.org/r/20220915092910.711036-1-lieven.hey@kdab.com Signed-off-by: Arnaldo Carvalho de Melo <acme@redhat.com>
Diffstat (limited to 'tools')
-rw-r--r--tools/perf/util/genelf.c14
-rw-r--r--tools/perf/util/genelf.h4
2 files changed, 18 insertions, 0 deletions
diff --git a/tools/perf/util/genelf.c b/tools/perf/util/genelf.c
index ed28a0dbcb7f..d81b54563e96 100644
--- a/tools/perf/util/genelf.c
+++ b/tools/perf/util/genelf.c
@@ -253,6 +253,7 @@ jit_write_elf(int fd, uint64_t load_addr, const char *sym,
Elf_Data *d;
Elf_Scn *scn;
Elf_Ehdr *ehdr;
+ Elf_Phdr *phdr;
Elf_Shdr *shdr;
uint64_t eh_frame_base_offset;
char *strsym = NULL;
@@ -288,6 +289,19 @@ jit_write_elf(int fd, uint64_t load_addr, const char *sym,
ehdr->e_shstrndx= unwinding ? 4 : 2; /* shdr index for section name */
/*
+ * setup program header
+ */
+ phdr = elf_newphdr(e, 1);
+ phdr[0].p_type = PT_LOAD;
+ phdr[0].p_offset = 0;
+ phdr[0].p_vaddr = 0;
+ phdr[0].p_paddr = 0;
+ phdr[0].p_filesz = csize;
+ phdr[0].p_memsz = csize;
+ phdr[0].p_flags = PF_X | PF_R;
+ phdr[0].p_align = 8;
+
+ /*
* setup text section
*/
scn = elf_newscn(e);
diff --git a/tools/perf/util/genelf.h b/tools/perf/util/genelf.h
index ae138afe6c56..b5c909546e3f 100644
--- a/tools/perf/util/genelf.h
+++ b/tools/perf/util/genelf.h
@@ -53,8 +53,10 @@ int jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_ent
#if GEN_ELF_CLASS == ELFCLASS64
#define elf_newehdr elf64_newehdr
+#define elf_newphdr elf64_newphdr
#define elf_getshdr elf64_getshdr
#define Elf_Ehdr Elf64_Ehdr
+#define Elf_Phdr Elf64_Phdr
#define Elf_Shdr Elf64_Shdr
#define Elf_Sym Elf64_Sym
#define ELF_ST_TYPE(a) ELF64_ST_TYPE(a)
@@ -62,8 +64,10 @@ int jit_add_debug_info(Elf *e, uint64_t code_addr, void *debug, int nr_debug_ent
#define ELF_ST_VIS(a) ELF64_ST_VISIBILITY(a)
#else
#define elf_newehdr elf32_newehdr
+#define elf_newphdr elf32_newphdr
#define elf_getshdr elf32_getshdr
#define Elf_Ehdr Elf32_Ehdr
+#define Elf_Phdr Elf32_Phdr
#define Elf_Shdr Elf32_Shdr
#define Elf_Sym Elf32_Sym
#define ELF_ST_TYPE(a) ELF32_ST_TYPE(a)