From 145aacc2e0507dd42a80ae293bbe70f184d08272 Mon Sep 17 00:00:00 2001 From: Richard Henderson Date: Wed, 29 May 2002 17:28:14 -0700 Subject: [PATCH] i386.c (USE_HIDDEN_LINKONCE): New. * config/i386/i386.c (USE_HIDDEN_LINKONCE): New. (get_pc_thunk_name): New. (output_set_got): Use it. (ix86_asm_file_end): If USE_HIDDEN_LINKONCE, emit get_pc thunks into linkonce sections. From-SVN: r54031 --- gcc/ChangeLog | 8 ++++++ gcc/config/i386/i386.c | 63 ++++++++++++++++++++++++++++++++++-------- 2 files changed, 60 insertions(+), 11 deletions(-) diff --git a/gcc/ChangeLog b/gcc/ChangeLog index 77cc267deb0..888da82ad38 100644 --- a/gcc/ChangeLog +++ b/gcc/ChangeLog @@ -1,3 +1,11 @@ +2002-05-29 Richard Henderson + + * config/i386/i386.c (USE_HIDDEN_LINKONCE): New. + (get_pc_thunk_name): New. + (output_set_got): Use it. + (ix86_asm_file_end): If USE_HIDDEN_LINKONCE, emit get_pc thunks + into linkonce sections. + 2002-05-29 Jason Thorpe * config/sparc/netbsd-elf.h (TARGET_OS_CPP_BUILTINS): Define. diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index bea81e807ed..1715ca02a21 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -672,6 +672,7 @@ static rtx ix86_expand_int_compare PARAMS ((enum rtx_code, rtx, rtx)); static enum rtx_code ix86_prepare_fp_compare_args PARAMS ((enum rtx_code, rtx *, rtx *)); static rtx get_thread_pointer PARAMS ((void)); +static void get_pc_thunk_name PARAMS ((char [32], unsigned int)); static rtx gen_push PARAMS ((rtx)); static int memory_address_length PARAMS ((rtx addr)); static int ix86_flags_dependant PARAMS ((rtx, rtx, enum attr_type)); @@ -3898,8 +3899,29 @@ ix86_setup_frame_addresses () cfun->machine->accesses_prev_frame = 1; } +#if defined(HAVE_GAS_HIDDEN) && defined(SUPPORTS_ONE_ONLY) +# define USE_HIDDEN_LINKONCE 1 +#else +# define USE_HIDDEN_LINKONCE 0 +#endif + static int pic_labels_used; +/* Fills in the label name that should be used for a pc thunk for + the given register. */ + +static void +get_pc_thunk_name (name, regno) + char name[32]; + unsigned int regno; +{ + if (USE_HIDDEN_LINKONCE) + sprintf (name, "__i686.get_pc_thunk.%s", reg_names[regno]); + else + ASM_GENERATE_INTERNAL_LABEL (name, "LPR", regno); +} + + /* This function generates code for -fpic that loads %ebx with the return address of the caller and then returns. */ @@ -3912,18 +3934,37 @@ ix86_asm_file_end (file) for (regno = 0; regno < 8; ++regno) { + char name[32]; + if (! ((pic_labels_used >> regno) & 1)) continue; - text_section (); + get_pc_thunk_name (name, regno); + + if (USE_HIDDEN_LINKONCE) + { + tree decl; + + decl = build_decl (FUNCTION_DECL, get_identifier (name), + error_mark_node); + TREE_PUBLIC (decl) = 1; + TREE_STATIC (decl) = 1; + DECL_ONE_ONLY (decl) = 1; - /* This used to call ASM_DECLARE_FUNCTION_NAME() but since it's an - internal (non-global) label that's being emitted, it didn't make - sense to have .type information for local labels. This caused - the SCO OpenServer 5.0.4 ELF assembler grief (why are you giving - me debug info for a label that you're declaring non-global?) this - was changed to call ASM_OUTPUT_LABEL() instead. */ - ASM_OUTPUT_INTERNAL_LABEL (file, "LPR", regno); + (*targetm.asm_out.unique_section) (decl, 0); + named_section (decl, NULL, 0); + + ASM_GLOBALIZE_LABEL (file, name); + fputs ("\t.hidden\t", file); + assemble_name (file, name); + fputc ('\n', file); + ASM_DECLARE_FUNCTION_NAME (file, name, decl); + } + else + { + text_section (); + ASM_OUTPUT_LABEL (file, name); + } xops[0] = gen_rtx_REG (SImode, regno); xops[1] = gen_rtx_MEM (SImode, stack_pointer_rtx); @@ -3960,11 +4001,11 @@ output_set_got (dest) } else { - char pic_label_name[32]; - ASM_GENERATE_INTERNAL_LABEL (pic_label_name, "LPR", REGNO (dest)); + char name[32]; + get_pc_thunk_name (name, REGNO (dest)); pic_labels_used |= 1 << REGNO (dest); - xops[2] = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (pic_label_name)); + xops[2] = gen_rtx_SYMBOL_REF (Pmode, ggc_strdup (name)); xops[2] = gen_rtx_MEM (QImode, xops[2]); output_asm_insn ("call\t%X2", xops); } -- 2.30.2