install.texi (--with-mips-plt): Document.
gcc/
2008-08-17 Daniel Jacobowitz <dan@codesourcery.com>
Richard Sandiford <rdsandiford@googlemail.com>
* doc/install.texi (--with-mips-plt): Document.
* doc/invoke.texi (-mplt, -mno-plt): Document.
* config.gcc (mips*-*-*): Add mips-plt to supported_defaults
and handle ${with_mips_plt}.
* config/mips/mips.opt (mplt): New option.
* config/mips/mips.h (TARGET_ABICALLS_PIC0): New macro.
(TARGET_ABICALLS_PIC2): Likewise.
(TARGET_GPWORD): Return false for TARGET_ABSOLUTE_ABICALLS.
(OPTION_DEFAULT_SPECS): Add a mips-plt entry.
(ASM_SPEC): Use !mabi=* instead of !mabi*.
(MIPS_CALL): Use TARGET_ABICALLS_PIC2 instead of TARGET_ABICALLS
to decide whether to output ".option picX" directives.
* config/mips/linux.h (SUBTARGET_ASM_SPEC): Remove -mabi=64 handling.
Pass -call_nonpic rather than -KPIC for -mplt.
(BASE_DRIVER_SELF_SPECS): Remove -mplt if -mno-shared is not present
on the command line. Also remove it when -mabi=64 is used without
-msym32.
* config/mips/linux64.h (SUBTARGET_ASM_SPEC): Delete.
* config/mips/mips.c (mips_use_pic_fn_addr_reg_p): Handle
TARGET_ABICALLS_PIC0.
(mips_classify_symbol): Use TARGET_ABICALLS_PIC2 instead of
TARGET_ABICALLS.
(mips16_build_function_stub): Only output ".option pic" directives
and PIC stubs if TARGET_ABICALLS_PIC2. Call through $25 instead of $1.
(mips16_build_call_stub): Fix comment and remove redundant
".set at"/"set .noat" directives.
(mips_function_rodata_section): Use the default behaviour for
TARGET_ABSOLUTE_ABICALLS.
(mips_file_start): Emit ".option pic0" for TARGET_ABICALLS_PIC0.
(mips_global_pointer): Handle TARGET_ABICALLS_PIC0.
(mips_restore_gp): Do nothing if the current function doesn't use
a global pointer.
(mips_expand_prologue): Only save $gp if the current function uses it.
Use a normal move for TARGET_ABICALLS_PIC0.
(mips_override_options): Only set flag_pic if TARGET_ABICALLS_PIC2.
Co-Authored-By: Richard Sandiford <rdsandiford@googlemail.com>
From-SVN: r139170
This commit is contained in:
Daniel Jacobowitz
Richard Sandiford
parent
4817c43b17
commit
e21d5757ec
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@ -1,3 +1,42 @@
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2008-08-17 Daniel Jacobowitz <dan@codesourcery.com>
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Richard Sandiford <rdsandiford@googlemail.com>
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* doc/install.texi (--with-mips-plt): Document.
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* doc/invoke.texi (-mplt, -mno-plt): Document.
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* config.gcc (mips*-*-*): Add mips-plt to supported_defaults
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and handle ${with_mips_plt}.
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* config/mips/mips.opt (mplt): New option.
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* config/mips/mips.h (TARGET_ABICALLS_PIC0): New macro.
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(TARGET_ABICALLS_PIC2): Likewise.
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(TARGET_GPWORD): Return false for TARGET_ABSOLUTE_ABICALLS.
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(OPTION_DEFAULT_SPECS): Add a mips-plt entry.
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(ASM_SPEC): Use !mabi=* instead of !mabi*.
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(MIPS_CALL): Use TARGET_ABICALLS_PIC2 instead of TARGET_ABICALLS
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to decide whether to output ".option picX" directives.
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* config/mips/linux.h (SUBTARGET_ASM_SPEC): Remove -mabi=64 handling.
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Pass -call_nonpic rather than -KPIC for -mplt.
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(BASE_DRIVER_SELF_SPECS): Remove -mplt if -mno-shared is not present
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on the command line. Also remove it when -mabi=64 is used without
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-msym32.
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* config/mips/linux64.h (SUBTARGET_ASM_SPEC): Delete.
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* config/mips/mips.c (mips_use_pic_fn_addr_reg_p): Handle
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TARGET_ABICALLS_PIC0.
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(mips_classify_symbol): Use TARGET_ABICALLS_PIC2 instead of
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TARGET_ABICALLS.
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(mips16_build_function_stub): Only output ".option pic" directives
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and PIC stubs if TARGET_ABICALLS_PIC2. Call through $25 instead of $1.
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(mips16_build_call_stub): Fix comment and remove redundant
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".set at"/"set .noat" directives.
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(mips_function_rodata_section): Use the default behaviour for
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TARGET_ABSOLUTE_ABICALLS.
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(mips_file_start): Emit ".option pic0" for TARGET_ABICALLS_PIC0.
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(mips_global_pointer): Handle TARGET_ABICALLS_PIC0.
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(mips_restore_gp): Do nothing if the current function doesn't use
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a global pointer.
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(mips_expand_prologue): Only save $gp if the current function uses it.
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Use a normal move for TARGET_ABICALLS_PIC0.
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(mips_override_options): Only set flag_pic if TARGET_ABICALLS_PIC2.
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2008-08-17 Richard Sandiford <rdsandiford@googlemail.com>
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* config/mips/mips.c (mips_save_reg_p): Don't short-circuit rest
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@ -2779,7 +2779,7 @@ case "${target}" in
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;;
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mips*-*-*)
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supported_defaults="abi arch float tune divide llsc"
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supported_defaults="abi arch float tune divide llsc mips-plt"
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case ${with_float} in
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"" | soft | hard)
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@ -2826,6 +2826,21 @@ case "${target}" in
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exit 1
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;;
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esac
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case ${with_mips_plt} in
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yes)
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with_mips_plt=plt
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;;
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no)
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with_mips_plt=no-plt
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;;
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"")
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;;
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*)
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echo "Unknown --with-mips-plt argument: $with_mips_plt" 1>&2
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exit 1
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;;
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esac
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;;
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powerpc*-*-* | rs6000-*-*)
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@ -3078,10 +3093,10 @@ case ${target} in
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esac
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t=
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all_defaults="abi cpu cpu_32 cpu_64 arch arch_32 arch_64 tune tune_32 tune_64 schedule float mode fpu divide llsc"
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all_defaults="abi cpu cpu_32 cpu_64 arch arch_32 arch_64 tune tune_32 tune_64 schedule float mode fpu divide llsc mips-plt"
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for option in $all_defaults
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do
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eval "val=\$with_$option"
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eval "val=\$with_"`echo $option | sed s/-/_/g`
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if test -n "$val"; then
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case " $supported_defaults " in
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*" $option "*)
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@ -79,7 +79,8 @@ along with GCC; see the file COPYING3. If not see
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%{static:-static}}}"
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#undef SUBTARGET_ASM_SPEC
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#define SUBTARGET_ASM_SPEC "%{mabi=64: -64} %{!mno-abicalls:-KPIC}"
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#define SUBTARGET_ASM_SPEC \
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"%{!mno-abicalls:%{mplt:-call_nonpic;:-KPIC}}"
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/* The MIPS assembler has different syntax for .set. We set it to
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.dummy to trap any errors. */
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@ -134,6 +135,11 @@ extern const char *host_detect_local_cpu (int argc, const char **argv);
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#endif
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#define BASE_DRIVER_SELF_SPECS \
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NO_SHARED_SPECS \
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MARCH_MTUNE_NATIVE_SPECS
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NO_SHARED_SPECS \
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MARCH_MTUNE_NATIVE_SPECS, \
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/* -mplt has no effect without -mno-shared. Simplify later \
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specs handling by removing a redundant option. */ \
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"%{!mno-shared:%<mplt}", \
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/* -mplt likewise has no effect for -mabi=64 without -msym32. */ \
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"%{mabi=64:%{!msym32:%<mplt}}"
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#define DRIVER_SELF_SPECS BASE_DRIVER_SELF_SPECS
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@ -26,11 +26,6 @@ BASE_DRIVER_SELF_SPECS \
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" %{!EB:%{!EL:%(endian_spec)}}" \
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" %{!mabi=*: -mabi=n32}"
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#undef SUBTARGET_ASM_SPEC
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#define SUBTARGET_ASM_SPEC "\
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%{!fno-PIC:%{!fno-pic:-KPIC}} \
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%{fno-PIC:-non_shared} %{fno-pic:-non_shared}"
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#undef LIB_SPEC
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#define LIB_SPEC "\
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%{pthread:-lpthread} \
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@ -1454,13 +1454,20 @@ mips_use_pic_fn_addr_reg_p (const_rtx x)
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if (mips16_stub_function_p (x))
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return false;
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/* When TARGET_ABSOLUTE_ABICALLS is true, locally-defined functions
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use absolute accesses to set up the global pointer. */
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if (TARGET_ABSOLUTE_ABICALLS
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&& GET_CODE (x) == SYMBOL_REF
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&& mips_symbol_binds_local_p (x)
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&& !SYMBOL_REF_EXTERNAL_P (x))
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return false;
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if (GET_CODE (x) == SYMBOL_REF)
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{
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/* If PLTs and copy relocations are available, the static linker
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will make sure that $25 is valid on entry to the target function. */
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if (TARGET_ABICALLS_PIC0)
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return false;
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/* Locally-defined functions use absolute accesses to set up
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the global pointer. */
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if (TARGET_ABSOLUTE_ABICALLS
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&& mips_symbol_binds_local_p (x)
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&& !SYMBOL_REF_EXTERNAL_P (x))
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return false;
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}
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return true;
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}
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@ -1512,7 +1519,7 @@ mips_classify_symbol (const_rtx x, enum mips_symbol_context context)
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/* Don't use GOT accesses for locally-binding symbols when -mno-shared
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is in effect. */
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if (TARGET_ABICALLS
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if (TARGET_ABICALLS_PIC2
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&& !(TARGET_ABSOLUTE_ABICALLS && mips_symbol_binds_local_p (x)))
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{
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/* There are three cases to consider:
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@ -5657,35 +5664,36 @@ mips16_build_function_stub (void)
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assemble_start_function (stubdecl, stubname);
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mips_start_function_definition (stubname, false);
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/* If generating abicalls code, either set up the global pointer or
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switch to absolute mode. */
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if (TARGET_ABSOLUTE_ABICALLS)
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fprintf (asm_out_file, "\t.option\tpic0\n");
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else if (TARGET_ABICALLS)
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/* If generating pic2 code, either set up the global pointer or
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switch to pic0. */
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if (TARGET_ABICALLS_PIC2)
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{
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output_asm_insn ("%(.cpload\t%^%)", NULL);
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/* Emit an R_MIPS_NONE relocation to tell the linker what the
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target function is. Use a local GOT access when loading the
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symbol, to cut down on the number of unnecessary GOT entries
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for stubs that aren't needed. */
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output_asm_insn (".reloc\t0,R_MIPS_NONE,%0", &symbol);
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symbol = alias;
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if (TARGET_ABSOLUTE_ABICALLS)
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fprintf (asm_out_file, "\t.option\tpic0\n");
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else
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{
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output_asm_insn ("%(.cpload\t%^%)", NULL);
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/* Emit an R_MIPS_NONE relocation to tell the linker what the
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target function is. Use a local GOT access when loading the
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symbol, to cut down on the number of unnecessary GOT entries
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for stubs that aren't needed. */
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output_asm_insn (".reloc\t0,R_MIPS_NONE,%0", &symbol);
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symbol = alias;
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}
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}
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/* Load the address of the MIPS16 function into $at. Do this first so
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/* Load the address of the MIPS16 function into $25. Do this first so
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that targets with coprocessor interlocks can use an MFC1 to fill the
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delay slot. */
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fprintf (asm_out_file, "\t.set\tnoat\n");
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output_asm_insn ("la\t%@,%0", &symbol);
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output_asm_insn ("la\t%^,%0", &symbol);
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/* Move the arguments from floating-point registers to general registers. */
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mips_output_args_xfer (crtl->args.info.fp_code, 'f');
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/* Jump to the MIPS16 function. */
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output_asm_insn ("jr\t%@", NULL);
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fprintf (asm_out_file, "\t.set\tat\n");
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output_asm_insn ("jr\t%^", NULL);
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if (TARGET_ABSOLUTE_ABICALLS)
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if (TARGET_ABICALLS_PIC2 && TARGET_ABSOLUTE_ABICALLS)
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fprintf (asm_out_file, "\t.option\tpic2\n");
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mips_end_function_definition (stubname);
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@ -5906,10 +5914,9 @@ mips16_build_call_stub (rtx retval, rtx *fn_ptr, rtx args_size, int fp_code)
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if (!fp_ret_p)
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{
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/* Load the address of the MIPS16 function into $at. Do this
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/* Load the address of the MIPS16 function into $25. Do this
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first so that targets with coprocessor interlocks can use
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an MFC1 to fill the delay slot. */
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fprintf (asm_out_file, "\t.set\tnoat\n");
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if (TARGET_EXPLICIT_RELOCS)
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{
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output_asm_insn ("lui\t%^,%%hi(%0)", &fn);
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|
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@ -5927,7 +5934,6 @@ mips16_build_call_stub (rtx retval, rtx *fn_ptr, rtx args_size, int fp_code)
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{
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/* Jump to the previously-loaded address. */
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output_asm_insn ("jr\t%^", NULL);
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fprintf (asm_out_file, "\t.set\tat\n");
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}
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else
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{
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@ -7222,15 +7228,16 @@ mips_select_rtx_section (enum machine_mode mode, rtx x,
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/* Implement TARGET_ASM_FUNCTION_RODATA_SECTION.
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The complication here is that, with the combination TARGET_ABICALLS
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&& !TARGET_GPWORD, jump tables will use absolute addresses, and should
|
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therefore not be included in the read-only part of a DSO. Handle such
|
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cases by selecting a normal data section instead of a read-only one.
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The logic apes that in default_function_rodata_section. */
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&& !TARGET_ABSOLUTE_ABICALLS && !TARGET_GPWORD, jump tables will use
|
||||
absolute addresses, and should therefore not be included in the
|
||||
read-only part of a DSO. Handle such cases by selecting a normal
|
||||
data section instead of a read-only one. The logic apes that in
|
||||
default_function_rodata_section. */
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||||
|
||||
static section *
|
||||
mips_function_rodata_section (tree decl)
|
||||
{
|
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if (!TARGET_ABICALLS || TARGET_GPWORD)
|
||||
if (!TARGET_ABICALLS || TARGET_ABSOLUTE_ABICALLS || TARGET_GPWORD)
|
||||
return default_function_rodata_section (decl);
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|
||||
if (decl && DECL_SECTION_NAME (decl))
|
||||
|
|
@ -7729,7 +7736,11 @@ mips_file_start (void)
|
|||
|
||||
/* If TARGET_ABICALLS, tell GAS to generate -KPIC code. */
|
||||
if (TARGET_ABICALLS)
|
||||
fprintf (asm_out_file, "\t.abicalls\n");
|
||||
{
|
||||
fprintf (asm_out_file, "\t.abicalls\n");
|
||||
if (TARGET_ABICALLS_PIC0)
|
||||
fprintf (asm_out_file, "\t.option\tpic0\n");
|
||||
}
|
||||
|
||||
if (flag_verbose_asm)
|
||||
fprintf (asm_out_file, "\n%s -G value = %d, Arch = %s, ISA = %d\n",
|
||||
|
|
@ -8285,24 +8296,40 @@ mips_global_pointer (void)
|
|||
if (crtl->has_nonlocal_goto)
|
||||
return GLOBAL_POINTER_REGNUM;
|
||||
|
||||
/* If the gp is never referenced, there's no need to initialize it.
|
||||
Note that reload can sometimes introduce constant pool references
|
||||
into a function that otherwise didn't need them. For example,
|
||||
suppose we have an instruction like:
|
||||
|
||||
(set (reg:DF R1) (float:DF (reg:SI R2)))
|
||||
|
||||
If R2 turns out to be constant such as 1, the instruction may have a
|
||||
REG_EQUAL note saying that R1 == 1.0. Reload then has the option of
|
||||
using this constant if R2 doesn't get allocated to a register.
|
||||
|
||||
In cases like these, reload will have added the constant to the pool
|
||||
but no instruction will yet refer to it. */
|
||||
/* There's no need to initialize $gp if it isn't referenced now,
|
||||
and if we can be sure that no new references will be added during
|
||||
or after reload. */
|
||||
if (!df_regs_ever_live_p (GLOBAL_POINTER_REGNUM)
|
||||
&& !crtl->uses_const_pool
|
||||
&& !mips16_cfun_returns_in_fpr_p ()
|
||||
&& !mips_function_has_gp_insn ())
|
||||
return 0;
|
||||
{
|
||||
/* The function doesn't use $gp at the moment. If we're generating
|
||||
-call_nonpic code, no new uses will be introduced during or after
|
||||
reload. */
|
||||
if (TARGET_ABICALLS_PIC0)
|
||||
return 0;
|
||||
|
||||
/* We need to handle the following implicit gp references:
|
||||
|
||||
- Reload can sometimes introduce constant pool references
|
||||
into a function that otherwise didn't need them. For example,
|
||||
suppose we have an instruction like:
|
||||
|
||||
(set (reg:DF R1) (float:DF (reg:SI R2)))
|
||||
|
||||
If R2 turns out to be constant such as 1, the instruction may
|
||||
have a REG_EQUAL note saying that R1 == 1.0. Reload then has
|
||||
the option of using this constant if R2 doesn't get allocated
|
||||
to a register.
|
||||
|
||||
In cases like these, reload will have added the constant to the
|
||||
pool but no instruction will yet refer to it.
|
||||
|
||||
- MIPS16 functions that return in FPRs need to call an
|
||||
external libgcc routine. */
|
||||
if (!crtl->uses_const_pool
|
||||
&& !mips16_cfun_returns_in_fpr_p ())
|
||||
return 0;
|
||||
}
|
||||
|
||||
/* We need a global pointer, but perhaps we can use a call-clobbered
|
||||
register instead of $gp. */
|
||||
|
|
@ -8694,6 +8721,9 @@ mips_restore_gp (rtx temp)
|
|||
{
|
||||
gcc_assert (TARGET_ABICALLS && TARGET_OLDABI);
|
||||
|
||||
if (cfun->machine->global_pointer == 0)
|
||||
return;
|
||||
|
||||
if (TARGET_MIPS16)
|
||||
{
|
||||
mips_emit_move (temp, mips_cprestore_slot (temp));
|
||||
|
|
@ -9121,13 +9151,17 @@ mips_expand_prologue (void)
|
|||
mips_emit_loadgp ();
|
||||
|
||||
/* Initialize the $gp save slot. */
|
||||
if (frame->cprestore_size > 0)
|
||||
if (frame->cprestore_size > 0
|
||||
&& cfun->machine->global_pointer != 0)
|
||||
{
|
||||
if (TARGET_MIPS16)
|
||||
mips_emit_move (mips_cprestore_slot (MIPS_PROLOGUE_TEMP (Pmode)),
|
||||
MIPS16_PIC_TEMP);
|
||||
else
|
||||
else if (TARGET_ABICALLS_PIC2)
|
||||
emit_insn (gen_cprestore (GEN_INT (frame->args_size)));
|
||||
else
|
||||
emit_move_insn (mips_cprestore_slot (MIPS_PROLOGUE_TEMP (Pmode)),
|
||||
pic_offset_table_rtx);
|
||||
}
|
||||
|
||||
/* If we are profiling, make sure no instructions are scheduled before
|
||||
|
|
@ -13196,14 +13230,16 @@ mips_override_options (void)
|
|||
target_flags &= ~MASK_ABICALLS;
|
||||
}
|
||||
|
||||
if (TARGET_ABICALLS)
|
||||
if (TARGET_ABICALLS_PIC2)
|
||||
/* We need to set flag_pic for executables as well as DSOs
|
||||
because we may reference symbols that are not defined in
|
||||
the final executable. (MIPS does not use things like
|
||||
copy relocs, for example.)
|
||||
|
||||
Also, there is a body of code that uses __PIC__ to distinguish
|
||||
between -mabicalls and -mno-abicalls code. */
|
||||
There is a body of code that uses __PIC__ to distinguish
|
||||
between -mabicalls and -mno-abicalls code. The non-__PIC__
|
||||
variant is usually appropriate for TARGET_ABICALLS_PIC0, as
|
||||
long as any indirect jumps use $25. */
|
||||
flag_pic = 1;
|
||||
|
||||
/* -mvr4130-align is a "speed over size" optimization: it usually produces
|
||||
|
|
|
|||
|
|
@ -148,6 +148,15 @@ enum mips_code_readable_setting {
|
|||
/* True if we are generating position-independent VxWorks RTP code. */
|
||||
#define TARGET_RTP_PIC (TARGET_VXWORKS_RTP && flag_pic)
|
||||
|
||||
/* True if the output file is marked as ".abicalls; .option pic0"
|
||||
(-call_nonpic). */
|
||||
#define TARGET_ABICALLS_PIC0 \
|
||||
(TARGET_ABSOLUTE_ABICALLS && TARGET_PLT)
|
||||
|
||||
/* True if the output file is marked as ".abicalls; .option pic2" (-KPIC). */
|
||||
#define TARGET_ABICALLS_PIC2 \
|
||||
(TARGET_ABICALLS && !TARGET_ABICALLS_PIC0)
|
||||
|
||||
/* True if the call patterns should be split into a jalr followed by
|
||||
an instruction to restore $gp. It is only safe to split the load
|
||||
from the call when every use of $gp is explicit. */
|
||||
|
|
@ -200,7 +209,10 @@ enum mips_code_readable_setting {
|
|||
Although GAS does understand .gpdword, the SGI linker mishandles
|
||||
the relocations GAS generates (R_MIPS_GPREL32 followed by R_MIPS_64).
|
||||
We therefore disable GP-relative switch tables for n64 on IRIX targets. */
|
||||
#define TARGET_GPWORD (TARGET_ABICALLS && !(mips_abi == ABI_64 && TARGET_IRIX))
|
||||
#define TARGET_GPWORD \
|
||||
(TARGET_ABICALLS \
|
||||
&& !TARGET_ABSOLUTE_ABICALLS \
|
||||
&& !(mips_abi == ABI_64 && TARGET_IRIX))
|
||||
|
||||
/* Generate mips16 code */
|
||||
#define TARGET_MIPS16 ((target_flags & MASK_MIPS16) != 0)
|
||||
|
|
@ -715,7 +727,8 @@ enum mips_code_readable_setting {
|
|||
{"abi", "%{!mabi=*:-mabi=%(VALUE)}" }, \
|
||||
{"float", "%{!msoft-float:%{!mhard-float:-m%(VALUE)-float}}" }, \
|
||||
{"divide", "%{!mdivide-traps:%{!mdivide-breaks:-mdivide-%(VALUE)}}" }, \
|
||||
{"llsc", "%{!mllsc:%{!mno-llsc:-m%(VALUE)}}" }
|
||||
{"llsc", "%{!mllsc:%{!mno-llsc:-m%(VALUE)}}" }, \
|
||||
{"mips-plt", "%{!mplt:%{!mno-plt:-m%(VALUE)}}" }
|
||||
|
||||
|
||||
#define GENERATE_DIVIDE_TRAPS (TARGET_DIVIDE_TRAPS \
|
||||
|
|
@ -1074,7 +1087,7 @@ enum mips_code_readable_setting {
|
|||
%{mfix-vr4120} %{mfix-vr4130} \
|
||||
%(subtarget_asm_optimizing_spec) \
|
||||
%(subtarget_asm_debugging_spec) \
|
||||
%{mabi=*} %{!mabi*: %(asm_abi_default_spec)} \
|
||||
%{mabi=*} %{!mabi=*: %(asm_abi_default_spec)} \
|
||||
%{mgp32} %{mgp64} %{march=*} %{mxgot:-xgot} \
|
||||
%{mfp32} %{mfp64} \
|
||||
%{mshared} %{mno-shared} \
|
||||
|
|
@ -2559,7 +2572,7 @@ typedef struct mips_args {
|
|||
? "%*" INSN "\t%" #OPNO "%/" \
|
||||
: REG_P (OPERANDS[OPNO]) \
|
||||
? "%*" INSN "r\t%" #OPNO "%/" \
|
||||
: TARGET_ABICALLS \
|
||||
: TARGET_ABICALLS_PIC2 \
|
||||
? (".option\tpic0\n\t" \
|
||||
"%*" INSN "\t%" #OPNO "%/\n\t" \
|
||||
".option\tpic2") \
|
||||
|
|
|
|||
|
|
@ -160,6 +160,10 @@ mgpopt
|
|||
Target Report Var(TARGET_GPOPT) Init(1)
|
||||
Use GP-relative addressing to access small data
|
||||
|
||||
mplt
|
||||
Target Report Var(TARGET_PLT)
|
||||
When generating -mabicalls code, allow executables to use PLTs and copy relocations
|
||||
|
||||
mhard-float
|
||||
Target Report RejectNegative InverseMask(SOFT_FLOAT_ABI, HARD_FLOAT_ABI)
|
||||
Allow the use of hardware floating-point ABI and instructions
|
||||
|
|
|
|||
|
|
@ -1076,6 +1076,12 @@ not provide them.
|
|||
On MIPS targets, make @option{-mno-llsc} the default when no
|
||||
@option{-mllsc} option is passed.
|
||||
|
||||
@item --with-mips-plt
|
||||
On MIPS targets, make use of copy relocations and PLTs.
|
||||
These features are extensions to the traditional
|
||||
SVR4-based MIPS ABIs and require support from GNU binutils
|
||||
and the runtime C library.
|
||||
|
||||
@item --enable-__cxa_atexit
|
||||
Define if you want to use __cxa_atexit, rather than atexit, to
|
||||
register C++ destructors for local statics and global objects.
|
||||
|
|
|
|||
|
|
@ -634,8 +634,8 @@ Objective-C and Objective-C++ Dialects}.
|
|||
-mips16 -mno-mips16 -mflip-mips16 @gol
|
||||
-minterlink-mips16 -mno-interlink-mips16 @gol
|
||||
-mabi=@var{abi} -mabicalls -mno-abicalls @gol
|
||||
-mshared -mno-shared -mxgot -mno-xgot -mgp32 -mgp64 @gol
|
||||
-mfp32 -mfp64 -mhard-float -msoft-float @gol
|
||||
-mshared -mno-shared -mplt -mno-plt -mxgot -mno-xgot @gol
|
||||
-mgp32 -mgp64 -mfp32 -mfp64 -mhard-float -msoft-float @gol
|
||||
-msingle-float -mdouble-float -mdsp -mno-dsp -mdspr2 -mno-dspr2 @gol
|
||||
-msmartmips -mno-smartmips @gol
|
||||
-mpaired-single -mno-paired-single -mdmx -mno-mdmx @gol
|
||||
|
|
@ -12162,6 +12162,19 @@ executables both smaller and quicker.
|
|||
|
||||
@option{-mshared} is the default.
|
||||
|
||||
@item -mplt
|
||||
@itemx -mno-plt
|
||||
@opindex mplt
|
||||
@opindex mno-plt
|
||||
Assume (do not assume) that the static and dynamic linkers
|
||||
support PLTs and copy relocations. This option only affects
|
||||
@samp{-mno-shared -mabicalls}. For the n64 ABI, this option
|
||||
has no effect without @samp{-msym32}.
|
||||
|
||||
You can make @option{-mplt} the default by configuring
|
||||
GCC with @option{--with-mips-plt}. The default is
|
||||
@option{-mno-plt} otherwise.
|
||||
|
||||
@item -mxgot
|
||||
@itemx -mno-xgot
|
||||
@opindex mxgot
|
||||
|
|
|
|||
Loading…
Reference in New Issue