diff --git a/package/elf2flt/0004-elf2flt-create-a-common-helper-function.patch b/package/elf2flt/0004-elf2flt-create-a-common-helper-function.patch new file mode 100644 index 0000000000..6fee99d45a --- /dev/null +++ b/package/elf2flt/0004-elf2flt-create-a-common-helper-function.patch @@ -0,0 +1,76 @@ +From 37e1e0ace8ccebf54ec2f5522bfc1f9db86946ad Mon Sep 17 00:00:00 2001 +From: Niklas Cassel +Date: Tue, 9 Aug 2022 12:13:50 +0200 +Subject: [PATCH] elf2flt: create a common helper function + +In order to make the code more maintainable, +move duplicated code to a common helper function. + +No functional change intended. + +Signed-off-by: Niklas Cassel +--- + elf2flt.c | 19 +++++++++++-------- + 1 file changed, 11 insertions(+), 8 deletions(-) + +diff --git a/elf2flt.c b/elf2flt.c +index 669591e..9c32f9a 100644 +--- a/elf2flt.c ++++ b/elf2flt.c +@@ -337,6 +337,13 @@ compare_relocs (const void *pa, const void *pb) + } + #endif + ++static bool ++ro_reloc_data_section_should_be_in_text(asection *s) ++{ ++ return (s->flags & (SEC_DATA | SEC_READONLY | SEC_RELOC)) == ++ (SEC_DATA | SEC_READONLY | SEC_RELOC); ++} ++ + static uint32_t * + output_relocs ( + bfd *abs_bfd, +@@ -428,8 +435,7 @@ output_relocs ( + */ + if ((!pic_with_got || ALWAYS_RELOC_TEXT) && + ((a->flags & SEC_CODE) || +- ((a->flags & (SEC_DATA | SEC_READONLY | SEC_RELOC)) == +- (SEC_DATA | SEC_READONLY | SEC_RELOC)))) ++ ro_reloc_data_section_should_be_in_text(a))) + sectionp = text + (a->vma - text_vma); + else if (a->flags & SEC_DATA) + sectionp = data + (a->vma - data_vma); +@@ -1893,8 +1899,7 @@ int main(int argc, char *argv[]) + bfd_vma sec_vma; + + if ((s->flags & SEC_CODE) || +- ((s->flags & (SEC_DATA | SEC_READONLY | SEC_RELOC)) == +- (SEC_DATA | SEC_READONLY | SEC_RELOC))) { ++ ro_reloc_data_section_should_be_in_text(s)) { + vma = &text_vma; + len = &text_len; + } else if (s->flags & SEC_DATA) { +@@ -1932,8 +1937,7 @@ int main(int argc, char *argv[]) + * data sections.*/ + for (s = abs_bfd->sections; s != NULL; s = s->next) + if ((s->flags & SEC_CODE) || +- ((s->flags & (SEC_DATA | SEC_READONLY | SEC_RELOC)) == +- (SEC_DATA | SEC_READONLY | SEC_RELOC))) ++ ro_reloc_data_section_should_be_in_text(s)) + if (!bfd_get_section_contents(abs_bfd, s, + text + (s->vma - text_vma), 0, + bfd_section_size(abs_bfd, s))) +@@ -1962,8 +1966,7 @@ int main(int argc, char *argv[]) + * data sections already included in the text output section.*/ + for (s = abs_bfd->sections; s != NULL; s = s->next) + if ((s->flags & SEC_DATA) && +- ((s->flags & (SEC_READONLY | SEC_RELOC)) != +- (SEC_READONLY | SEC_RELOC))) ++ !ro_reloc_data_section_should_be_in_text(s)) + if (!bfd_get_section_contents(abs_bfd, s, + data + (s->vma - data_vma), 0, + bfd_section_size(abs_bfd, s))) +-- +2.37.1 + diff --git a/package/elf2flt/0005-elf2flt-fix-fatal-error-regression-on-m68k-xtensa-ri.patch b/package/elf2flt/0005-elf2flt-fix-fatal-error-regression-on-m68k-xtensa-ri.patch new file mode 100644 index 0000000000..278709cb1c --- /dev/null +++ b/package/elf2flt/0005-elf2flt-fix-fatal-error-regression-on-m68k-xtensa-ri.patch @@ -0,0 +1,73 @@ +From 65ac5f9e69cfb989d970da74c41e478774d29be5 Mon Sep 17 00:00:00 2001 +From: Niklas Cassel +Date: Tue, 9 Aug 2022 21:06:05 +0200 +Subject: [PATCH] elf2flt: fix fatal error regression on m68k, xtensa, + riscv64 + +Commit ba379d08bb78 ("elf2flt: fix for segfault on some ARM ELFs") +changed the condition of which input sections that should be included +in the .text output section from: +((a->flags & (SEC_DATA | SEC_READONLY)) == (SEC_DATA | SEC_READONLY)) +to: +((a->flags & (SEC_DATA | SEC_READONLY | SEC_RELOC)) == +(SEC_DATA | SEC_READONLY | SEC_RELOC)) + +On ARM, the .eh_frame input section does not have the SEC_RELOC flag +set, so this specific change had no effect on ARM. + +However, on e.g. m68k and riscv64, the .eh_frame input section does +have the SEC_RELOC flag set, which means that after commit ba379d08bb78 +("elf2flt: fix for segfault on some ARM ELFs"), read-only relocation +data sections were placed in .text output section, instead of .data +output section. + +This will result in a fatal error on m68k, xtensa and riscv64: +ERROR: text=0x3bab8 overlaps data=0x33f60 ? + +This is because elf2flt cannot append to .text after .data has been +appended to. + +Note that the binutils maintainer says that the correct thing is +to put read-only relocation data sections in .text: +https://sourceware.org/legacy-ml/binutils/2019-10/msg00132.html + +So the proper fix is probably to rewrite elf2flt so that it can append +to .text after .data has been appended to (which will require elf2flt +to move/relocate everything that has already been appended to .data, +since the virtual addresses are contiguous). + +However, for now, add an exception for m68k, xtensa and riscv64 +(specifically for the problematic input section, .eh_frame), so that we +get the same behavior as older elf2flt releases, where we put read-only +relocation data in .data, which was working perfectly fine. + +Signed-off-by: Niklas Cassel +--- + elf2flt.c | 11 +++++++++-- + 1 file changed, 9 insertions(+), 2 deletions(-) + +diff --git a/elf2flt.c b/elf2flt.c +index 9c32f9a..a680c89 100644 +--- a/elf2flt.c ++++ b/elf2flt.c +@@ -340,8 +340,15 @@ compare_relocs (const void *pa, const void *pb) + static bool + ro_reloc_data_section_should_be_in_text(asection *s) + { +- return (s->flags & (SEC_DATA | SEC_READONLY | SEC_RELOC)) == +- (SEC_DATA | SEC_READONLY | SEC_RELOC); ++ if ((s->flags & (SEC_DATA | SEC_READONLY | SEC_RELOC)) == ++ (SEC_DATA | SEC_READONLY | SEC_RELOC)) { ++#if defined(TARGET_m68k) || defined(TARGET_riscv64) || defined(TARGET_xtensa) ++ if (!strcmp(".eh_frame", s->name)) ++ return false; ++#endif ++ return true; ++ } ++ return false; + } + + static uint32_t * +-- +2.37.1 +