diff options
Diffstat (limited to 'meta/recipes-devtools/binutils/binutils/0036-2011-12-19-Chung-Lin-Tang-cltang-codesourcery.com.patch')
| -rw-r--r-- | meta/recipes-devtools/binutils/binutils/0036-2011-12-19-Chung-Lin-Tang-cltang-codesourcery.com.patch | 214 |
1 files changed, 214 insertions, 0 deletions
diff --git a/meta/recipes-devtools/binutils/binutils/0036-2011-12-19-Chung-Lin-Tang-cltang-codesourcery.com.patch b/meta/recipes-devtools/binutils/binutils/0036-2011-12-19-Chung-Lin-Tang-cltang-codesourcery.com.patch new file mode 100644 index 0000000..9017c25 --- /dev/null +++ b/meta/recipes-devtools/binutils/binutils/0036-2011-12-19-Chung-Lin-Tang-cltang-codesourcery.com.patch @@ -0,0 +1,214 @@ +Upstream-Status: Backport + +From 26e802720ccd055d70addadbc39f4119716f8573 Mon Sep 17 00:00:00 2001 +From: cltang <cltang> +Date: Mon, 19 Dec 2011 10:39:27 +0000 +Subject: [PATCH 036/262] 2011-12-19 Chung-Lin Tang + <cltang@codesourcery.com> + + Backport from mainline: + + 2011-12-19 Chung-Lin Tang <cltang@codesourcery.com> + Catherine Moore <clm@codesourcery.com> + Sandra Loosemore <sandra@codesourcery.com> + Richard Sandiford <rdsandiford@googlemail.com> + + * elfxx-mips.c (mips_elf_local_pic_function_p): Return true when + H is a MIPS16 function with a kept 32-bit stub. Update comments. + (mips_elf_get_la25_target): New function. + (mips_elf_add_la25_intro): Change to use mips_elf_get_la25_target(). + (mips_elf_add_la25_stub): Move compute of use_trampoline_p down, + change to use mips_elf_get_la25_target(). + (mips_elf_relocation_needs_la25_stub): Add target_is_16_bit_code_p + parameter, add switch case for R_MIPS16_26. + (mips_elf_calculate_relocation): Redirect relocation to point to the + LA25 stub if it exists, instead of the MIPS16 stub. Update arguments + of call to mips_elf_relocation_needs_la25_stub(), don't use la25 stub + for mips16->mips16 calls. + (_bfd_mips_elf_check_relocs): Update arguments of call to + mips_elf_relocation_needs_la25_stub(). + (mips_elf_create_la25_stub): Change to use mips_elf_get_la25_target(). + +diff --git a/bfd/elfxx-mips.c b/bfd/elfxx-mips.c +index 3939183..9f3833b 100644 +--- a/bfd/elfxx-mips.c ++++ b/bfd/elfxx-mips.c +@@ -1575,9 +1575,10 @@ _bfd_mips_elf_init_stubs (struct bfd_link_info *info, + } + + /* Return true if H is a locally-defined PIC function, in the sense +- that it might need $25 to be valid on entry. Note that MIPS16 +- functions never need $25 to be valid on entry; they set up $gp +- using PC-relative instructions instead. */ ++ that it or its fn_stub might need $25 to be valid on entry. ++ Note that MIPS16 functions set up $gp using PC-relative instructions, ++ so they themselves never need $25 to be valid. Only non-MIPS16 ++ entry points are of interest here. */ + + static bfd_boolean + mips_elf_local_pic_function_p (struct mips_elf_link_hash_entry *h) +@@ -1586,11 +1587,32 @@ mips_elf_local_pic_function_p (struct mips_elf_link_hash_entry *h) + || h->root.root.type == bfd_link_hash_defweak) + && h->root.def_regular + && !bfd_is_abs_section (h->root.root.u.def.section) +- && !ELF_ST_IS_MIPS16 (h->root.other) ++ && (!ELF_ST_IS_MIPS16 (h->root.other) ++ || (h->fn_stub && h->need_fn_stub)) + && (PIC_OBJECT_P (h->root.root.u.def.section->owner) + || ELF_ST_IS_MIPS_PIC (h->root.other))); + } + ++/* Set *SEC to the input section that contains the target of STUB. ++ Return the offset of the target from the start of that section. */ ++ ++static bfd_vma ++mips_elf_get_la25_target (struct mips_elf_la25_stub *stub, ++ asection **sec) ++{ ++ if (ELF_ST_IS_MIPS16 (stub->h->root.other)) ++ { ++ BFD_ASSERT (stub->h->need_fn_stub); ++ *sec = stub->h->fn_stub; ++ return 0; ++ } ++ else ++ { ++ *sec = stub->h->root.root.u.def.section; ++ return stub->h->root.root.u.def.value; ++ } ++} ++ + /* STUB describes an la25 stub that we have decided to implement + by inserting an LUI/ADDIU pair before the target function. + Create the section and redirect the function symbol to it. */ +@@ -1615,7 +1637,7 @@ mips_elf_add_la25_intro (struct mips_elf_la25_stub *stub, + sprintf (name, ".text.stub.%d", (int) htab_elements (htab->la25_stubs)); + + /* Create the section. */ +- input_section = stub->h->root.root.u.def.section; ++ mips_elf_get_la25_target (stub, &input_section); + s = htab->add_stub_section (name, input_section, + input_section->output_section); + if (s == NULL) +@@ -1689,12 +1711,6 @@ mips_elf_add_la25_stub (struct bfd_link_info *info, + bfd_vma value; + void **slot; + +- /* Prefer to use LUI/ADDIU stubs if the function is at the beginning +- of the section and if we would need no more than 2 nops. */ +- s = h->root.root.u.def.section; +- value = h->root.root.u.def.value; +- use_trampoline_p = (value != 0 || s->alignment_power > 4); +- + /* Describe the stub we want. */ + search.stub_section = NULL; + search.offset = 0; +@@ -1724,6 +1740,11 @@ mips_elf_add_la25_stub (struct bfd_link_info *info, + *stub = search; + *slot = stub; + ++ /* Prefer to use LUI/ADDIU stubs if the function is at the beginning ++ of the section and if we would need no more than 2 nops. */ ++ value = mips_elf_get_la25_target (stub, &s); ++ use_trampoline_p = (value != 0 || s->alignment_power > 4); ++ + h->la25_stub = stub; + return (use_trampoline_p + ? mips_elf_add_la25_trampoline (stub, info) +@@ -4911,7 +4932,8 @@ is_gott_symbol (struct bfd_link_info *info, struct elf_link_hash_entry *h) + stub. */ + + static bfd_boolean +-mips_elf_relocation_needs_la25_stub (bfd *input_bfd, int r_type) ++mips_elf_relocation_needs_la25_stub (bfd *input_bfd, int r_type, ++ bfd_boolean target_is_16_bit_code_p) + { + /* We specifically ignore branches and jumps from EF_PIC objects, + where the onus is on the compiler or programmer to perform any +@@ -4925,7 +4947,6 @@ mips_elf_relocation_needs_la25_stub (bfd *input_bfd, int r_type) + { + case R_MIPS_26: + case R_MIPS_PC16: +- case R_MIPS16_26: + case R_MICROMIPS_26_S1: + case R_MICROMIPS_PC7_S1: + case R_MICROMIPS_PC10_S1: +@@ -4933,6 +4954,9 @@ mips_elf_relocation_needs_la25_stub (bfd *input_bfd, int r_type) + case R_MICROMIPS_PC23_S2: + return TRUE; + ++ case R_MIPS16_26: ++ return !target_is_16_bit_code_p; ++ + default: + return FALSE; + } +@@ -5193,14 +5217,28 @@ mips_elf_calculate_relocation (bfd *abfd, bfd *input_bfd, + have already noticed that we were going to need the + stub. */ + if (local_p) +- sec = elf_tdata (input_bfd)->local_stubs[r_symndx]; ++ { ++ sec = elf_tdata (input_bfd)->local_stubs[r_symndx]; ++ value = 0; ++ } + else + { + BFD_ASSERT (h->need_fn_stub); +- sec = h->fn_stub; ++ if (h->la25_stub) ++ { ++ /* If a LA25 header for the stub itself exists, point to the ++ prepended LUI/ADDIU sequence. */ ++ sec = h->la25_stub->stub_section; ++ value = h->la25_stub->offset; ++ } ++ else ++ { ++ sec = h->fn_stub; ++ value = 0; ++ } + } + +- symbol = sec->output_section->vma + sec->output_offset; ++ symbol = sec->output_section->vma + sec->output_offset + value; + /* The target is 16-bit, but the stub isn't. */ + target_is_16_bit_code_p = FALSE; + } +@@ -5250,7 +5288,8 @@ mips_elf_calculate_relocation (bfd *abfd, bfd *input_bfd, + /* If this is a direct call to a PIC function, redirect to the + non-PIC stub. */ + else if (h != NULL && h->la25_stub +- && mips_elf_relocation_needs_la25_stub (input_bfd, r_type)) ++ && mips_elf_relocation_needs_la25_stub (input_bfd, r_type, ++ target_is_16_bit_code_p)) + symbol = (h->la25_stub->stub_section->output_section->vma + + h->la25_stub->stub_section->output_offset + + h->la25_stub->offset); +@@ -7925,7 +7964,9 @@ _bfd_mips_elf_check_relocs (bfd *abfd, struct bfd_link_info *info, + return FALSE; + } + +- if (h != NULL && mips_elf_relocation_needs_la25_stub (abfd, r_type)) ++ if (h != NULL ++ && mips_elf_relocation_needs_la25_stub (abfd, r_type, ++ ELF_ST_IS_MIPS16 (h->other))) + ((struct mips_elf_link_hash_entry *) h)->has_nonpic_branches = TRUE; + + switch (r_type) +@@ -9622,9 +9663,9 @@ mips_elf_create_la25_stub (void **slot, void *data) + offset = stub->offset; + + /* Work out the target address. */ +- target = (stub->h->root.root.u.def.section->output_section->vma +- + stub->h->root.root.u.def.section->output_offset +- + stub->h->root.root.u.def.value); ++ target = mips_elf_get_la25_target (stub, &s); ++ target += s->output_section->vma + s->output_offset; ++ + target_high = ((target + 0x8000) >> 16) & 0xffff; + target_low = (target & 0xffff); + +-- +1.7.9.5 + |
