diff options
Diffstat (limited to 'gcc/config/ia64/sysv4.h')
| -rw-r--r-- | gcc/config/ia64/sysv4.h | 158 |
1 files changed, 127 insertions, 31 deletions
diff --git a/gcc/config/ia64/sysv4.h b/gcc/config/ia64/sysv4.h index 1b5d4691efc..840ebdd9711 100644 --- a/gcc/config/ia64/sysv4.h +++ b/gcc/config/ia64/sysv4.h @@ -22,6 +22,11 @@ #undef ASCII_DATA_ASM_OP #define ASCII_DATA_ASM_OP "\tstring\t" +/* ia64-specific options for gas + ??? ia64 gas doesn't accept standard svr4 assembler options? */ +#undef ASM_SPEC +#define ASM_SPEC "-x %{mconstant-gp} %{mauto-pic} %(asm_extra)" + /* ??? Unfortunately, .lcomm doesn't work, because it puts things in either .bss or .sbss, and we can't control the decision of which is used. When I use .lcomm, I get a cryptic "Section group has no member" error from @@ -135,45 +140,136 @@ do { \ emit_safe_across_calls (STREAM); \ } while (0) +/* A C statement or statements to switch to the appropriate + section for output of DECL. DECL is either a `VAR_DECL' node + or a constant of some sort. RELOC indicates whether forming + the initial value of DECL requires link-time relocations. + + Set SECNUM to: + 0 .text + 1 .rodata + 2 .data + 3 .sdata + 4 .bss + 5 .sbss +*/ +#define DO_SELECT_SECTION(SECNUM, DECL, RELOC) \ + do \ + { \ + if (TREE_CODE (DECL) == FUNCTION_DECL) \ + SECNUM = 0; \ + else if (TREE_CODE (DECL) == STRING_CST) \ + { \ + if (! flag_writable_strings) \ + SECNUM = 0x101; \ + else \ + SECNUM = 2; \ + } \ + else if (TREE_CODE (DECL) == VAR_DECL) \ + { \ + if (XSTR (XEXP (DECL_RTL (DECL), 0), 0)[0] \ + == SDATA_NAME_FLAG_CHAR) \ + SECNUM = 3; \ + /* ??? We need the extra RELOC check, because the default \ + is to only check RELOC if flag_pic is set, and we don't \ + set flag_pic (yet?). */ \ + else if (!DECL_READONLY_SECTION (DECL, RELOC) || (RELOC)) \ + SECNUM = 2; \ + else if (flag_merge_constants < 2) \ + /* C and C++ don't allow different variables to share \ + the same location. -fmerge-all-constants allows \ + even that (at the expense of not conforming). */ \ + SECNUM = 1; \ + else if (TREE_CODE (DECL_INITIAL (DECL)) == STRING_CST) \ + SECNUM = 0x201; \ + else \ + SECNUM = 0x301; \ + } \ + /* This could be a CONSTRUCTOR containing ADDR_EXPR of a VAR_DECL, \ + in which case we can't put it in a shared library rodata. */ \ + else if (flag_pic && (RELOC)) \ + SECNUM = 3; \ + else \ + SECNUM = 2; \ + } \ + while (0) + /* We override svr4.h so that we can support the sdata section. */ #undef SELECT_SECTION #define SELECT_SECTION(DECL,RELOC,ALIGN) \ -{ \ - if (TREE_CODE (DECL) == STRING_CST) \ + do \ { \ - if (! flag_writable_strings) \ - mergeable_string_section ((DECL), (ALIGN), 0); \ - else \ - data_section (); \ + typedef void (*sec_fn) PARAMS ((void)); \ + static sec_fn const sec_functions[6] = \ + { \ + text_section, \ + const_section, \ + data_section, \ + sdata_section, \ + bss_section, \ + sbss_section \ + }; \ + \ + int sec; \ + \ + DO_SELECT_SECTION (sec, DECL, RELOC); \ + \ + switch (sec) \ + { \ + case 0x101: \ + mergeable_string_section (DECL, ALIGN, 0); \ + break; \ + case 0x201: \ + mergeable_string_section (DECL_INITIAL (DECL), \ + ALIGN, 0); \ + break; \ + case 0x301: \ + mergeable_constant_section (DECL_MODE (DECL), \ + ALIGN, 0); \ + break; \ + default: \ + (*sec_functions[sec]) (); \ + break; \ + } \ } \ - else if (TREE_CODE (DECL) == VAR_DECL) \ + while (0) + +#undef UNIQUE_SECTION +#define UNIQUE_SECTION(DECL, RELOC) \ + do \ { \ - if (XSTR (XEXP (DECL_RTL (DECL), 0), 0)[0] \ - == SDATA_NAME_FLAG_CHAR) \ - sdata_section (); \ - /* ??? We need the extra RELOC check, because the default is to \ - only check RELOC if flag_pic is set, and we don't set flag_pic \ - (yet?). */ \ - else if (!DECL_READONLY_SECTION (DECL, RELOC) || (RELOC)) \ - data_section (); \ - else if (flag_merge_constants < 2) \ - /* C and C++ don't allow different variables to share \ - the same location. -fmerge-all-constants allows \ - even that (at the expense of not conforming). */ \ - const_section (); \ - else if (TREE_CODE (DECL_INITIAL (DECL)) == STRING_CST) \ - mergeable_string_section (DECL_INITIAL (DECL), (ALIGN), 0); \ - else \ - mergeable_constant_section (DECL_MODE (DECL), (ALIGN), 0); \ + static const char * const prefixes[6][2] = \ + { \ + { ".text.", ".gnu.linkonce.t." }, \ + { ".rodata.", ".gnu.linkonce.r." }, \ + { ".data.", ".gnu.linkonce.d." }, \ + { ".sdata.", ".gnu.linkonce.s." }, \ + { ".bss.", ".gnu.linkonce.b." }, \ + { ".sbss.", ".gnu.linkonce.sb." } \ + }; \ + \ + int nlen, plen, sec; \ + const char *name, *prefix; \ + char *string; \ + \ + DO_SELECT_SECTION (sec, DECL, RELOC); \ + \ + name = IDENTIFIER_POINTER (DECL_ASSEMBLER_NAME (DECL)); \ + STRIP_NAME_ENCODING (name, name); \ + nlen = strlen (name); \ + \ + prefix = prefixes[sec & 0xff][DECL_ONE_ONLY(DECL)]; \ + plen = strlen (prefix); \ + \ + string = alloca (nlen + plen + 1); \ + \ + memcpy (string, prefix, plen); \ + memcpy (string + plen, name, nlen + 1); \ + \ + DECL_SECTION_NAME (DECL) = build_string (nlen + plen, string); \ } \ - /* This could be a CONSTRUCTOR containing ADDR_EXPR of a VAR_DECL, \ - in which case we can't put it in a shared library rodata. */ \ - else if (flag_pic && (RELOC)) \ - data_section (); \ - else \ - const_section (); \ -} + while (0) /* Similarly for constant pool data. */ |