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| author | H.J. Lu <hjl.tools@gmail.com> | 2015-08-25 09:42:20 -0700 |
|---|---|---|
| committer | H.J. Lu <hjl.tools@gmail.com> | 2016-06-22 06:04:17 -0700 |
| commit | dc14c8980672194a1b329b5c35a7f781bc04a3f5 (patch) | |
| tree | e3d6a419510c587892d5ca8abf5a7a199cd640fc /gas | |
| parent | 6b1edb94fedc7103b4929354d27304d0bd756f49 (diff) | |
| download | gdb-users/hjl/sharable.zip gdb-users/hjl/sharable.tar.gz gdb-users/hjl/sharable.tar.bz2 | |
Add PT_GNU_SHR/SHF_GNU_SHARABLE/SHN_GNU_SHARABLE_COMMON support to gas/ldusers/hjl/sharable
PT_GNU_SHR/SHF_GNU_SHARABLE/SHN_GNU_SHARABLE_COMMON are used to group
data into a PT_GNU_SHR to improve performance on NUMA system.
Diffstat (limited to 'gas')
| -rw-r--r-- | gas/config/obj-elf.c | 42 |
1 files changed, 42 insertions, 0 deletions
diff --git a/gas/config/obj-elf.c b/gas/config/obj-elf.c index 8af563f..da3b483 100644 --- a/gas/config/obj-elf.c +++ b/gas/config/obj-elf.c @@ -76,6 +76,7 @@ static void obj_elf_subsection (int); static void obj_elf_popsection (int); static void obj_elf_gnu_attribute (int); static void obj_elf_tls_common (int); +static void obj_elf_sharable_common (int); static void obj_elf_lcomm (int); static void obj_elf_struct (int); @@ -136,6 +137,8 @@ static const pseudo_typeS elf_pseudo_table[] = {"tls_common", obj_elf_tls_common, 0}, + {"sharable_common", obj_elf_sharable_common, 0}, + /* End sentinel. */ {NULL, NULL, 0}, }; @@ -394,6 +397,39 @@ obj_elf_tls_common (int ignore ATTRIBUTE_UNUSED) } static void +obj_elf_sharable_common (int ignore ATTRIBUTE_UNUSED) +{ + static segT sharable_bss_section; + asection *saved_com_section_ptr = elf_com_section_ptr; + asection *saved_bss_section = bss_section; + + if (sharable_bss_section == NULL) + { + flagword applicable; + segT seg = now_seg; + subsegT subseg = now_subseg; + + /* The .sharable_bss section is for local .sharable_common + symbols. */ + sharable_bss_section = subseg_new (".sharable_bss", 0); + applicable = bfd_applicable_section_flags (stdoutput); + bfd_set_section_flags (stdoutput, sharable_bss_section, + applicable & SEC_ALLOC); + seg_info (sharable_bss_section)->bss = 1; + + subseg_set (seg, subseg); + } + + elf_com_section_ptr = &_bfd_elf_sharable_com_section; + bss_section = sharable_bss_section; + + s_comm_internal (0, elf_common_parse); + + elf_com_section_ptr = saved_com_section_ptr; + bss_section = saved_bss_section; +} + +static void obj_elf_lcomm (int ignore ATTRIBUTE_UNUSED) { symbolS *symbolP = s_comm_internal (0, s_lcomm_internal); @@ -611,11 +647,17 @@ obj_elf_change_section (const char *name, .section .lbss,"aw",@progbits + "@progbits" is incorrect. Also for sharable bss + sections, gcc, as of 2005-07-06, will emit + + .section .sharable_bss,"aw",@progbits + "@progbits" is incorrect. */ #ifdef TC_I386 && (bed->s->arch_size != 64 || !(ssect->attr & SHF_X86_64_LARGE)) #endif + && !(ssect->attr & SHF_GNU_SHARABLE) && ssect->type != SHT_INIT_ARRAY && ssect->type != SHT_FINI_ARRAY && ssect->type != SHT_PREINIT_ARRAY) |