diff options
Diffstat (limited to 'patches/elfutils-0.176/0007-Add-mips-n64-relocation-format-hack.patch')
-rw-r--r-- | patches/elfutils-0.176/0007-Add-mips-n64-relocation-format-hack.patch | 229 |
1 files changed, 229 insertions, 0 deletions
diff --git a/patches/elfutils-0.176/0007-Add-mips-n64-relocation-format-hack.patch b/patches/elfutils-0.176/0007-Add-mips-n64-relocation-format-hack.patch new file mode 100644 index 000000000..46d7240ac --- /dev/null +++ b/patches/elfutils-0.176/0007-Add-mips-n64-relocation-format-hack.patch @@ -0,0 +1,229 @@ +From: James Cowgill <james410@cowgill.org.uk> +Date: Mon, 5 Jan 2015 15:17:02 +0000 +Subject: [PATCH] Add mips n64 relocation format hack + +MIPSEL N64 ELF files use a slightly different format for storing relocation +entries which is incompatible with the normal R_SYM / R_INFO macros. +To workaround this, we rearrange the bytes in the relocation's r_info field +when reading and writing the relocations. + +This patch also ensures that strip.c sets the correct value of e_machine +before manipulating relocations so that these changes take effect. + +Signed-off-by: James Cowgill <james410@cowgill.org.uk> + +Imported from elfutils_0.176-1.debian.tar.xz + +Signed-off-by: Michael Olbrich <m.olbrich@pengutronix.de> +--- + libelf/gelf_getrel.c | 25 +++++++++++++++++++++++-- + libelf/gelf_getrela.c | 25 +++++++++++++++++++++++-- + libelf/gelf_update_rel.c | 20 +++++++++++++++++++- + libelf/gelf_update_rela.c | 20 +++++++++++++++++++- + src/strip.c | 17 +++++++++++++++++ + 5 files changed, 101 insertions(+), 6 deletions(-) + +diff --git a/libelf/gelf_getrel.c b/libelf/gelf_getrel.c +index 309e3d37457b..2a81a97c9a45 100644 +--- a/libelf/gelf_getrel.c ++++ b/libelf/gelf_getrel.c +@@ -36,6 +36,7 @@ + + #include "libelfP.h" + ++#define EF_MIPS_ABI 0x0000F000 + + GElf_Rel * + gelf_getrel (Elf_Data *data, int ndx, GElf_Rel *dst) +@@ -89,8 +90,28 @@ gelf_getrel (Elf_Data *data, int ndx, GElf_Rel *dst) + result = NULL; + } + else +- result = memcpy (dst, &((Elf64_Rel *) data_scn->d.d_buf)[ndx], +- sizeof (Elf64_Rel)); ++ { ++ GElf_Ehdr hdr; ++ result = memcpy (dst, &((Elf64_Rel *) data_scn->d.d_buf)[ndx], ++ sizeof (Elf64_Rel)); ++ ++ if (gelf_getehdr(scn->elf, &hdr) != NULL && ++ hdr.e_ident[EI_DATA] == ELFDATA2LSB && ++ hdr.e_machine == EM_MIPS && ++ (hdr.e_flags & EF_MIPS_ABI) == 0) ++ { ++ /* ++ * The relocation format is mangled on MIPSEL N64 ++ * We'll adjust it so at least R_SYM will work on it ++ */ ++ GElf_Xword r_info = dst->r_info; ++ dst->r_info = (r_info << 32) | ++ ((r_info >> 8) & 0xFF000000) | ++ ((r_info >> 24) & 0x00FF0000) | ++ ((r_info >> 40) & 0x0000FF00) | ++ ((r_info >> 56) & 0x000000FF); ++ } ++ } + } + + rwlock_unlock (scn->elf->lock); +diff --git a/libelf/gelf_getrela.c b/libelf/gelf_getrela.c +index d695f6593dc4..1f42a80b4c7e 100644 +--- a/libelf/gelf_getrela.c ++++ b/libelf/gelf_getrela.c +@@ -36,6 +36,7 @@ + + #include "libelfP.h" + ++#define EF_MIPS_ABI 0x0000F000 + + GElf_Rela * + gelf_getrela (Elf_Data *data, int ndx, GElf_Rela *dst) +@@ -90,8 +91,28 @@ gelf_getrela (Elf_Data *data, int ndx, GElf_Rela *dst) + result = NULL; + } + else +- result = memcpy (dst, &((Elf64_Rela *) data_scn->d.d_buf)[ndx], +- sizeof (Elf64_Rela)); ++ { ++ GElf_Ehdr hdr; ++ result = memcpy (dst, &((Elf64_Rela *) data_scn->d.d_buf)[ndx], ++ sizeof (Elf64_Rela)); ++ ++ if (gelf_getehdr(scn->elf, &hdr) != NULL && ++ hdr.e_ident[EI_DATA] == ELFDATA2LSB && ++ hdr.e_machine == EM_MIPS && ++ (hdr.e_flags & EF_MIPS_ABI) == 0) ++ { ++ /* ++ * The relocation format is mangled on MIPSEL N64 ++ * We'll adjust it so at least R_SYM will work on it ++ */ ++ GElf_Xword r_info = dst->r_info; ++ dst->r_info = (r_info << 32) | ++ ((r_info >> 8) & 0xFF000000) | ++ ((r_info >> 24) & 0x00FF0000) | ++ ((r_info >> 40) & 0x0000FF00) | ++ ((r_info >> 56) & 0x000000FF); ++ } ++ } + } + + rwlock_unlock (scn->elf->lock); +diff --git a/libelf/gelf_update_rel.c b/libelf/gelf_update_rel.c +index 14f62e973a5e..90955566e4ad 100644 +--- a/libelf/gelf_update_rel.c ++++ b/libelf/gelf_update_rel.c +@@ -36,6 +36,7 @@ + + #include "libelfP.h" + ++#define EF_MIPS_ABI 0x0000F000 + + int + gelf_update_rel (Elf_Data *dst, int ndx, GElf_Rel *src) +@@ -86,6 +87,9 @@ gelf_update_rel (Elf_Data *dst, int ndx, GElf_Rel *src) + } + else + { ++ GElf_Ehdr hdr; ++ GElf_Rel value = *src; ++ + /* Check whether we have to resize the data buffer. */ + if (INVALID_NDX (ndx, Elf64_Rel, &data_scn->d)) + { +@@ -93,7 +97,21 @@ gelf_update_rel (Elf_Data *dst, int ndx, GElf_Rel *src) + goto out; + } + +- ((Elf64_Rel *) data_scn->d.d_buf)[ndx] = *src; ++ if (gelf_getehdr(scn->elf, &hdr) != NULL && ++ hdr.e_ident[EI_DATA] == ELFDATA2LSB && ++ hdr.e_machine == EM_MIPS && ++ (hdr.e_flags & EF_MIPS_ABI) == 0) ++ { ++ /* Undo the MIPSEL N64 hack from gelf_getrel */ ++ GElf_Xword r_info = value.r_info; ++ value.r_info = (r_info >> 32) | ++ ((r_info << 8) & 0x000000FF00000000) | ++ ((r_info << 24) & 0x0000FF0000000000) | ++ ((r_info << 40) & 0x00FF000000000000) | ++ ((r_info << 56) & 0xFF00000000000000); ++ } ++ ++ ((Elf64_Rel *) data_scn->d.d_buf)[ndx] = value; + } + + result = 1; +diff --git a/libelf/gelf_update_rela.c b/libelf/gelf_update_rela.c +index 88252703976f..4caa85fb9f8e 100644 +--- a/libelf/gelf_update_rela.c ++++ b/libelf/gelf_update_rela.c +@@ -36,6 +36,7 @@ + + #include "libelfP.h" + ++#define EF_MIPS_ABI 0x0000F000 + + int + gelf_update_rela (Elf_Data *dst, int ndx, GElf_Rela *src) +@@ -89,6 +90,9 @@ gelf_update_rela (Elf_Data *dst, int ndx, GElf_Rela *src) + } + else + { ++ GElf_Ehdr hdr; ++ GElf_Rela value = *src; ++ + /* Check whether we have to resize the data buffer. */ + if (INVALID_NDX (ndx, Elf64_Rela, &data_scn->d)) + { +@@ -96,7 +100,21 @@ gelf_update_rela (Elf_Data *dst, int ndx, GElf_Rela *src) + goto out; + } + +- ((Elf64_Rela *) data_scn->d.d_buf)[ndx] = *src; ++ if (gelf_getehdr(scn->elf, &hdr) != NULL && ++ hdr.e_ident[EI_DATA] == ELFDATA2LSB && ++ hdr.e_machine == EM_MIPS && ++ (hdr.e_flags & EF_MIPS_ABI) == 0) ++ { ++ /* Undo the MIPSEL N64 hack from gelf_getrel */ ++ GElf_Xword r_info = value.r_info; ++ value.r_info = (r_info >> 32) | ++ ((r_info << 8) & 0x000000FF00000000) | ++ ((r_info << 24) & 0x0000FF0000000000) | ++ ((r_info << 40) & 0x00FF000000000000) | ++ ((r_info << 56) & 0xFF00000000000000); ++ } ++ ++ ((Elf64_Rela *) data_scn->d.d_buf)[ndx] = value; + } + + result = 1; +diff --git a/src/strip.c b/src/strip.c +index a73009d980e6..75bd7ba60eb8 100644 +--- a/src/strip.c ++++ b/src/strip.c +@@ -1062,6 +1062,23 @@ handle_elf (int fd, Elf *elf, const char *prefix, const char *fname, + goto fail; + } + ++ /* Copy identity part of the ELF header now */ ++ newehdr = gelf_getehdr (newelf, &newehdr_mem); ++ if (newehdr == NULL) ++ INTERNAL_ERROR (fname); ++ ++ memcpy (newehdr->e_ident, ehdr->e_ident, EI_NIDENT); ++ newehdr->e_type = ehdr->e_type; ++ newehdr->e_machine = ehdr->e_machine; ++ newehdr->e_version = ehdr->e_version; ++ ++ if (gelf_update_ehdr (newelf, newehdr) == 0) ++ { ++ error (0, 0, gettext ("%s: error while creating ELF header: %s"), ++ fname, elf_errmsg (-1)); ++ return 1; ++ } ++ + /* Copy over the old program header if needed. */ + if (phnum > 0) + { |