On Sun, Jul 11, 2021 at 11:13 PM Richard Biener
<[email protected]> wrote:
>
> On Fri, Jul 9, 2021 at 4:50 PM H.J. Lu <[email protected]> wrote:
> >
> > -fdirect-extern-access is the default. With -fno-direct-extern-access:
> >
> > 1. Always use GOT to access undefined data and function symbols,
> > including in PIE and non-PIE. These will avoid copy relocations
> > in executables. This is compatible with existing executables and
> > shared libraries.
> > 2. In executable and shared library, bind symbols with the STV_PROTECTED
> > visibility locally:
> > a. The address of data symbol is the address of data body.
> > b. For systems without function descriptor, the function pointer is
> > the address of function body.
> > c. The resulting shared libraries may not be incompatible with
> > executables which have copy relocations on protected symbols or
> > use executable PLT entries as function addresses for protected
> > functions in shared libraries.
> > 3. Update asm_preferred_eh_data_format to select PC relative EH encoding
> > format with -fno-direct-extern-access to avoid copy relocation.
> > 4. Add ix86_reloc_rw_mask for TARGET_ASM_RELOC_RW_MASK to avoid copy
> > relocation with -fno-direct-extern-access.
>
> Did you check how relocations in .debug_info behave? I don't remember whether
Yes, I did. I added ix86_reloc_rw_mask and use PC-relative format for
EH pointer encodings to avoid copy relocation for -fno-direct-extern-access
in read-only sections.
> we're doing anything special there or if we just copy how we emit
> relocs in .text
>
> Richard.
>
> > gcc/
> >
> > PR target/35513
> > PR target/100593
> > * common.opt: Add -fdirect-extern-access.
> > * config/i386/i386-protos.h (ix86_force_load_from_GOT_p): Add a
> > bool argument.
> > * config/i386/i386.c (ix86_force_load_from_GOT_p): Add a bool
> > argument to indicate call operand. Force non-call load
> > from GOT for -fno-direct-extern-access.
> > (legitimate_pic_address_disp_p): Avoid copy relocation in PIE
> > for -fno-direct-extern-access.
> > (ix86_print_operand): Pass true to ix86_force_load_from_GOT_p
> > for call operand.
> > (asm_preferred_eh_data_format): Use PC-relative format for
> > -fno-direct-extern-access to avoid copy relocation. Check
> > ptr_mode instead of TARGET_64BIT when selecting DW_EH_PE_sdata4.
> > (ix86_binds_local_p): Don't treat protected data as extern and
> > avoid copy relocation on common symbol with
> > -fno-direct-extern-access.
> > (ix86_reloc_rw_mask): New to avoid copy relocation for
> > -fno-direct-extern-access.
> > (TARGET_ASM_RELOC_RW_MASK): New.
> > * doc/invoke.texi: Document -f[no-]direct-extern-access.
> >
> > gcc/testsuite/
> >
> > PR target/35513
> > PR target/100593
> > * g++.dg/pr35513-1.C: New file.
> > * g++.dg/pr35513-2.C: Likewise.
> > * gcc.target/i386/pr35513-1.c: Likewise.
> > * gcc.target/i386/pr35513-2.c: Likewise.
> > * gcc.target/i386/pr35513-3.c: Likewise.
> > * gcc.target/i386/pr35513-4.c: Likewise.
> > * gcc.target/i386/pr35513-5.c: Likewise.
> > * gcc.target/i386/pr35513-6.c: Likewise.
> > * gcc.target/i386/pr35513-7.c: Likewise.
> > * gcc.target/i386/pr35513-8.c: Likewise.
> > ---
> > gcc/common.opt | 4 ++
> > gcc/config/i386/i386-protos.h | 2 +-
> > gcc/config/i386/i386.c | 50 +++++++++++++++------
> > gcc/doc/invoke.texi | 13 ++++++
> > gcc/testsuite/g++.dg/pr35513-1.C | 25 +++++++++++
> > gcc/testsuite/g++.dg/pr35513-2.C | 53 +++++++++++++++++++++++
> > gcc/testsuite/gcc.target/i386/pr35513-1.c | 16 +++++++
> > gcc/testsuite/gcc.target/i386/pr35513-2.c | 15 +++++++
> > gcc/testsuite/gcc.target/i386/pr35513-3.c | 15 +++++++
> > gcc/testsuite/gcc.target/i386/pr35513-4.c | 15 +++++++
> > gcc/testsuite/gcc.target/i386/pr35513-5.c | 15 +++++++
> > gcc/testsuite/gcc.target/i386/pr35513-6.c | 14 ++++++
> > gcc/testsuite/gcc.target/i386/pr35513-7.c | 15 +++++++
> > gcc/testsuite/gcc.target/i386/pr35513-8.c | 41 ++++++++++++++++++
> > 14 files changed, 278 insertions(+), 15 deletions(-)
> > create mode 100644 gcc/testsuite/g++.dg/pr35513-1.C
> > create mode 100644 gcc/testsuite/g++.dg/pr35513-2.C
> > create mode 100644 gcc/testsuite/gcc.target/i386/pr35513-1.c
> > create mode 100644 gcc/testsuite/gcc.target/i386/pr35513-2.c
> > create mode 100644 gcc/testsuite/gcc.target/i386/pr35513-3.c
> > create mode 100644 gcc/testsuite/gcc.target/i386/pr35513-4.c
> > create mode 100644 gcc/testsuite/gcc.target/i386/pr35513-5.c
> > create mode 100644 gcc/testsuite/gcc.target/i386/pr35513-6.c
> > create mode 100644 gcc/testsuite/gcc.target/i386/pr35513-7.c
> > create mode 100644 gcc/testsuite/gcc.target/i386/pr35513-8.c
> >
> > diff --git a/gcc/common.opt b/gcc/common.opt
> > index d9da1131eda..67ad811d54d 100644
> > --- a/gcc/common.opt
> > +++ b/gcc/common.opt
> > @@ -1432,6 +1432,10 @@ fdiagnostics-minimum-margin-width=
> > Common Joined UInteger Var(diagnostics_minimum_margin_width) Init(6)
> > Set minimum width of left margin of source code when showing source.
> >
> > +fdirect-extern-access
> > +Common Var(flag_direct_extern_access) Init(1) Optimization
> > +Do not use GOT to access external symbols.
> > +
> > fdisable-
> > Common Joined RejectNegative Var(common_deferred_options) Defer
> > -fdisable-[tree|rtl|ipa]-<pass>=range1+range2 Disable an optimization
> > pass.
> > diff --git a/gcc/config/i386/i386-protos.h b/gcc/config/i386/i386-protos.h
> > index 51376fcc454..693cc3e5c78 100644
> > --- a/gcc/config/i386/i386-protos.h
> > +++ b/gcc/config/i386/i386-protos.h
> > @@ -79,7 +79,7 @@ extern bool ix86_expand_cmpstrn_or_cmpmem (rtx, rtx, rtx,
> > rtx, rtx, bool);
> > extern bool constant_address_p (rtx);
> > extern bool legitimate_pic_operand_p (rtx);
> > extern bool legitimate_pic_address_disp_p (rtx);
> > -extern bool ix86_force_load_from_GOT_p (rtx);
> > +extern bool ix86_force_load_from_GOT_p (rtx, bool = false);
> > extern void print_reg (rtx, int, FILE*);
> > extern void ix86_print_operand (FILE *, rtx, int);
> >
> > diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c
> > index cff26909292..7dee311051d 100644
> > --- a/gcc/config/i386/i386.c
> > +++ b/gcc/config/i386/i386.c
> > @@ -10312,13 +10312,17 @@ darwin_local_data_pic (rtx disp)
> > }
> >
> > /* True if the function symbol operand X should be loaded from GOT.
> > + If CALL_P is true, X is a call operand.
> > +
> > + NB: -fno-direct-extern-access doesn't force load from GOT for
> > + call.
> >
> > NB: In 32-bit mode, only non-PIC is allowed in inline assembly
> > statements, since a PIC register could not be available at the
> > call site. */
> >
> > bool
> > -ix86_force_load_from_GOT_p (rtx x)
> > +ix86_force_load_from_GOT_p (rtx x, bool call_p)
> > {
> > return ((TARGET_64BIT || (!flag_pic && HAVE_AS_IX86_GOT32X))
> > && !TARGET_PECOFF && !TARGET_MACHO
> > @@ -10326,11 +10330,12 @@ ix86_force_load_from_GOT_p (rtx x)
> > && ix86_cmodel != CM_LARGE
> > && ix86_cmodel != CM_LARGE_PIC
> > && GET_CODE (x) == SYMBOL_REF
> > - && SYMBOL_REF_FUNCTION_P (x)
> > - && (!flag_plt
> > - || (SYMBOL_REF_DECL (x)
> > - && lookup_attribute ("noplt",
> > - DECL_ATTRIBUTES (SYMBOL_REF_DECL
> > (x)))))
> > + && ((!call_p && !flag_direct_extern_access)
> > + || (SYMBOL_REF_FUNCTION_P (x)
> > + && (!flag_plt
> > + || (SYMBOL_REF_DECL (x)
> > + && lookup_attribute ("noplt",
> > + DECL_ATTRIBUTES
> > (SYMBOL_REF_DECL (x)))))))
> > && !SYMBOL_REF_LOCAL_P (x));
> > }
> >
> > @@ -10596,7 +10601,8 @@ legitimate_pic_address_disp_p (rtx disp)
> > }
> > else if (!SYMBOL_REF_FAR_ADDR_P (op0)
> > && (SYMBOL_REF_LOCAL_P (op0)
> > - || (HAVE_LD_PIE_COPYRELOC
> > + || (flag_direct_extern_access
> > + && HAVE_LD_PIE_COPYRELOC
> > && flag_pie
> > && !SYMBOL_REF_WEAK (op0)
> > && !SYMBOL_REF_FUNCTION_P (op0)))
> > @@ -13498,7 +13504,7 @@ ix86_print_operand (FILE *file, rtx x, int code)
> >
> > if (code == 'P')
> > {
> > - if (ix86_force_load_from_GOT_p (x))
> > + if (ix86_force_load_from_GOT_p (x, true))
> > {
> > /* For inline assembly statement, load function address
> > from GOT with 'P' operand modifier to avoid PLT. */
> > @@ -21935,10 +21941,10 @@ int
> > asm_preferred_eh_data_format (int code, int global)
> > {
> > /* PE-COFF is effectively always -fPIC because of the .reloc section. */
> > - if (flag_pic || TARGET_PECOFF)
> > + if (flag_pic || TARGET_PECOFF || !flag_direct_extern_access)
> > {
> > int type = DW_EH_PE_sdata8;
> > - if (!TARGET_64BIT
> > + if (ptr_mode == SImode
> > || ix86_cmodel == CM_SMALL_PIC
> > || (ix86_cmodel == CM_MEDIUM_PIC && (global || code)))
> > type = DW_EH_PE_sdata4;
> > @@ -23028,10 +23034,21 @@ ix86_atomic_assign_expand_fenv (tree *hold, tree
> > *clear, tree *update)
> > static bool
> > ix86_binds_local_p (const_tree exp)
> > {
> > - return default_binds_local_p_3 (exp, flag_shlib != 0, true, true,
> > - (!flag_pic
> > - || (TARGET_64BIT
> > - && HAVE_LD_PIE_COPYRELOC != 0)));
> > + return default_binds_local_p_3 (exp, flag_shlib != 0, true,
> > + flag_direct_extern_access,
> > + (flag_direct_extern_access
> > + && (!flag_pic
> > + || (TARGET_64BIT
> > + && HAVE_LD_PIE_COPYRELOC !=
> > 0))));
> > +}
> > +
> > +/* If flag_pic or flag_direct_extern_access is false, then neither
> > + local nor global relocs should be placed in readonly memory. */
> > +
> > +static int
> > +ix86_reloc_rw_mask (void)
> > +{
> > + return (flag_pic || !flag_direct_extern_access) ? 3 : 0;
> > }
> > #endif
> >
> > @@ -24071,6 +24088,11 @@ ix86_run_selftests (void)
> > #define TARGET_GET_MULTILIB_ABI_NAME \
> > ix86_get_multilib_abi_name
> >
> > +#if !TARGET_MACHO && !TARGET_DLLIMPORT_DECL_ATTRIBUTES
> > +# undef TARGET_ASM_RELOC_RW_MASK
> > +# define TARGET_ASM_RELOC_RW_MASK ix86_reloc_rw_mask
> > +#endif
> > +
> > static bool ix86_libc_has_fast_function (int fcode ATTRIBUTE_UNUSED)
> > {
> > #ifdef OPTION_GLIBC
> > diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi
> > index e67d47af676..2959c84cc3d 100644
> > --- a/gcc/doc/invoke.texi
> > +++ b/gcc/doc/invoke.texi
> > @@ -658,6 +658,7 @@ Objective-C and Objective-C++ Dialects}.
> > -fnon-call-exceptions -fdelete-dead-exceptions -funwind-tables @gol
> > -fasynchronous-unwind-tables @gol
> > -fno-gnu-unique @gol
> > +-fno-direct-extern-access @gol
> > -finhibit-size-directive -fcommon -fno-ident @gol
> > -fpcc-struct-return -fpic -fPIC -fpie -fPIE -fno-plt @gol
> > -fno-jump-tables -fno-bit-tests @gol
> > @@ -16633,6 +16634,18 @@ through the PLT for specific external functions.
> > In position-dependent code, a few targets also convert calls to
> > functions that are marked to not use the PLT to use the GOT instead.
> >
> > +@item -fno-direct-extern-access
> > +@opindex fno-direct-extern-access
> > +@opindex fdirect-extern-access
> > +Without @option{-fpic} nor @option{-fPIC}, always use the GOT pointer
> > +to access external symbols. With @option{-fpic} or @option{-fPIC},
> > +treat access to protected symbols as local symbols.
> > +
> > +@strong{Warning:} shared libraries compiled with
> > +@option{-fno-direct-extern-access} and executable compiled with
> > +@option{-fdirect-extern-access} may not be binary compatible if
> > +protected symbols are used in shared libraries and executable.
> > +
> > @item -fno-jump-tables
> > @opindex fno-jump-tables
> > @opindex fjump-tables
> > diff --git a/gcc/testsuite/g++.dg/pr35513-1.C
> > b/gcc/testsuite/g++.dg/pr35513-1.C
> > new file mode 100644
> > index 00000000000..8423e826da8
> > --- /dev/null
> > +++ b/gcc/testsuite/g++.dg/pr35513-1.C
> > @@ -0,0 +1,25 @@
> > +// { dg-do run }
> > +// { dg-options "-O2 -fno-direct-extern-access" }
> > +
> > +#include <iostream>
> > +
> > +class Bug
> > +{
> > +};
> > +
> > +int throw_bug()
> > +{
> > + throw Bug();
> > +
> > + return 0;
> > +}
> > +
> > +int main()
> > +{
> > + try {
> > + std::cout << throw_bug();
> > + } catch (Bug bug) {
> > + };
> > +
> > + return 0;
> > +}
> > diff --git a/gcc/testsuite/g++.dg/pr35513-2.C
> > b/gcc/testsuite/g++.dg/pr35513-2.C
> > new file mode 100644
> > index 00000000000..56ed19ae1eb
> > --- /dev/null
> > +++ b/gcc/testsuite/g++.dg/pr35513-2.C
> > @@ -0,0 +1,53 @@
> > +// { dg-do run }
> > +// { dg-options "-O2 -fno-direct-extern-access" }
> > +
> > +class Foo
> > +{
> > +public:
> > + Foo(int n) : n_(n) { }
> > + int f() { return n_; }
> > +
> > + int badTest();
> > + int goodTest();
> > +
> > +private:
> > +
> > + int n_;
> > +};
> > +
> > +int Foo::badTest()
> > +{
> > + try {
> > + throw int(99);
> > + }
> > +
> > + catch (int &i) {
> > + n_ = 16;
> > + }
> > +
> > + return n_;
> > +}
> > +
> > +
> > +int Foo::goodTest()
> > +{
> > + int n;
> > +
> > + try {
> > + throw int(99);
> > + }
> > +
> > + catch (int &i) {
> > + n = 16;
> > + }
> > +
> > + return n_;
> > +}
> > +
> > +int main()
> > +{
> > + Foo foo(5);
> > + foo.goodTest();
> > + foo.badTest();
> > + return 0;
> > +}
> > diff --git a/gcc/testsuite/gcc.target/i386/pr35513-1.c
> > b/gcc/testsuite/gcc.target/i386/pr35513-1.c
> > new file mode 100644
> > index 00000000000..c5dbabc3704
> > --- /dev/null
> > +++ b/gcc/testsuite/gcc.target/i386/pr35513-1.c
> > @@ -0,0 +1,16 @@
> > +/* { dg-do compile { target *-*-linux* } } */
> > +/* { dg-options "-O2 -fno-pic -fno-direct-extern-access" } */
> > +
> > +extern void bar (void);
> > +extern void *p;
> > +
> > +void
> > +foo (void)
> > +{
> > + p = &bar;
> > +}
> > +
> > +/* { dg-final { scan-assembler "mov\(l|q\)\[ \t\]*bar@GOTPCREL" { target {
> > ! ia32 } } } } */
> > +/* { dg-final { scan-assembler "movl\[ \t\]*bar@GOT," { target { ia32 &&
> > got32x_reloc } } } } */
> > +/* { dg-final { scan-assembler-not "mov\(l|q\)\[ \t\]*\\\$bar," { target {
> > ! ia32 } } } } */
> > +/* { dg-final { scan-assembler-not "mov\(l|q\)\[ \t\]*\\\$bar," { target {
> > ia32 && got32x_reloc } } } } */
> > diff --git a/gcc/testsuite/gcc.target/i386/pr35513-2.c
> > b/gcc/testsuite/gcc.target/i386/pr35513-2.c
> > new file mode 100644
> > index 00000000000..8bb7cb4c13d
> > --- /dev/null
> > +++ b/gcc/testsuite/gcc.target/i386/pr35513-2.c
> > @@ -0,0 +1,15 @@
> > +/* { dg-do compile { target *-*-linux* } } */
> > +/* { dg-options "-O2 -fno-pic -fno-direct-extern-access" } */
> > +
> > +extern int bar;
> > +
> > +int
> > +foo (void)
> > +{
> > + return bar;
> > +}
> > +
> > +/* { dg-final { scan-assembler "mov\(l|q\)\[ \t\]*bar@GOTPCREL" { target {
> > ! ia32 } } } } */
> > +/* { dg-final { scan-assembler "movl\[ \t\]*bar@GOT," { target { ia32 &&
> > got32x_reloc } } } } */
> > +/* { dg-final { scan-assembler-not "mov\(l|q\)\[ \t\]*\\\$bar," { target {
> > ! ia32 } } } } */
> > +/* { dg-final { scan-assembler-not "mov\(l|q\)\[ \t\]*\\\$bar," { target {
> > ia32 && got32x_reloc } } } } */
> > diff --git a/gcc/testsuite/gcc.target/i386/pr35513-3.c
> > b/gcc/testsuite/gcc.target/i386/pr35513-3.c
> > new file mode 100644
> > index 00000000000..98dc54e3bf4
> > --- /dev/null
> > +++ b/gcc/testsuite/gcc.target/i386/pr35513-3.c
> > @@ -0,0 +1,15 @@
> > +/* { dg-do compile { target *-*-linux* } } */
> > +/* { dg-options "-O2 -fpie -fno-direct-extern-access" } */
> > +
> > +extern int bar;
> > +
> > +int
> > +foo (void)
> > +{
> > + return bar;
> > +}
> > +
> > +/* { dg-final { scan-assembler "mov\(l|q\)\[ \t\]*bar@GOTPCREL" { target {
> > ! ia32 } } } } */
> > +/* { dg-final { scan-assembler "movl\[ \t\]*bar@GOT" { target { ia32 &&
> > got32x_reloc } } } } */
> > +/* { dg-final { scan-assembler-not "mov\(l|q\)\[ \t\]*\\\$bar," { target {
> > ! ia32 } } } } */
> > +/* { dg-final { scan-assembler-not "mov\(l|q\)\[ \t\]*\\\$bar," { target {
> > ia32 && got32x_reloc } } } } */
> > diff --git a/gcc/testsuite/gcc.target/i386/pr35513-4.c
> > b/gcc/testsuite/gcc.target/i386/pr35513-4.c
> > new file mode 100644
> > index 00000000000..467081dad65
> > --- /dev/null
> > +++ b/gcc/testsuite/gcc.target/i386/pr35513-4.c
> > @@ -0,0 +1,15 @@
> > +/* { dg-do compile { target *-*-linux* } } */
> > +/* { dg-options "-O2 -fplt -fno-pic -fno-direct-extern-access" } */
> > +
> > +extern void foo (void);
> > +
> > +int
> > +bar (void)
> > +{
> > + foo ();
> > + return 0;
> > +}
> > +
> > +/* { dg-final { scan-assembler "call\[ \t\]*foo" } } */
> > +/* { dg-final { scan-assembler-not "foo@GOTPCREL" { target { ! ia32 } } }
> > } */
> > +/* { dg-final { scan-assembler-not "foo@GOT" { target ia32 } } } */
> > diff --git a/gcc/testsuite/gcc.target/i386/pr35513-5.c
> > b/gcc/testsuite/gcc.target/i386/pr35513-5.c
> > new file mode 100644
> > index 00000000000..b0e61b08ba9
> > --- /dev/null
> > +++ b/gcc/testsuite/gcc.target/i386/pr35513-5.c
> > @@ -0,0 +1,15 @@
> > +/* { dg-do compile { target *-*-linux* } } */
> > +/* { dg-options "-O2 -fplt -fpic -fno-direct-extern-access" } */
> > +
> > +extern void foo (void);
> > +
> > +int
> > +bar (void)
> > +{
> > + foo ();
> > + return 0;
> > +}
> > +
> > +/* { dg-final { scan-assembler "call\[ \t\]*foo@PLT" } } */
> > +/* { dg-final { scan-assembler-not "foo@GOTPCREL" { target { ! ia32 } } }
> > } */
> > +/* { dg-final { scan-assembler-not "foo@GOT" { target ia32 } } } */
> > diff --git a/gcc/testsuite/gcc.target/i386/pr35513-6.c
> > b/gcc/testsuite/gcc.target/i386/pr35513-6.c
> > new file mode 100644
> > index 00000000000..270504b8d0e
> > --- /dev/null
> > +++ b/gcc/testsuite/gcc.target/i386/pr35513-6.c
> > @@ -0,0 +1,14 @@
> > +/* { dg-do compile { target *-*-linux* } } */
> > +/* { dg-options "-O2 -fplt -fno-pic -fno-direct-extern-access" } */
> > +
> > +extern void foo (void);
> > +
> > +void
> > +bar (void)
> > +{
> > + foo ();
> > +}
> > +
> > +/* { dg-final { scan-assembler "jmp\[ \t\]*foo" } } */
> > +/* { dg-final { scan-assembler-not "foo@GOTPCREL" { target { ! ia32 } } }
> > } */
> > +/* { dg-final { scan-assembler-not "foo@GOT" { target ia32 } } } */
> > diff --git a/gcc/testsuite/gcc.target/i386/pr35513-7.c
> > b/gcc/testsuite/gcc.target/i386/pr35513-7.c
> > new file mode 100644
> > index 00000000000..2c5a83ddef8
> > --- /dev/null
> > +++ b/gcc/testsuite/gcc.target/i386/pr35513-7.c
> > @@ -0,0 +1,15 @@
> > +/* { dg-do compile { target *-*-linux* } } */
> > +/* { dg-options "-O2 -fplt -fpic -fno-direct-extern-access" } */
> > +
> > +extern void foo (void);
> > +
> > +void
> > +bar (void)
> > +{
> > + foo ();
> > +}
> > +
> > +/* { dg-final { scan-assembler "jmp\[ \t\]*foo@PLT" { target { ! ia32 } }
> > } } */
> > +/* { dg-final { scan-assembler "call\[ \t\]*foo@PLT" { target ia32 } } } */
> > +/* { dg-final { scan-assembler-not "foo@GOTPCREL" { target { ! ia32 } } }
> > } */
> > +/* { dg-final { scan-assembler-not "foo@GOT" { target ia32 } } } */
> > diff --git a/gcc/testsuite/gcc.target/i386/pr35513-8.c
> > b/gcc/testsuite/gcc.target/i386/pr35513-8.c
> > new file mode 100644
> > index 00000000000..545979e99c2
> > --- /dev/null
> > +++ b/gcc/testsuite/gcc.target/i386/pr35513-8.c
> > @@ -0,0 +1,41 @@
> > +/* { dg-do assemble { target { *-*-linux* && { ! ia32 } } } } */
> > +/* { dg-require-effective-target maybe_x32 } */
> > +/* { dg-options "-mx32 -O2 -fno-pic -fexceptions
> > -fasynchronous-unwind-tables -fno-direct-extern-access" } */
> > +
> > +extern int foo (int);
> > +extern void exit (int __status) __attribute__ ((__nothrow__ ))
> > __attribute__ ((__noreturn__));
> > +struct __pthread_cleanup_frame
> > +{
> > + void (*__cancel_routine) (void *);
> > + void *__cancel_arg;
> > + int __do_it;
> > + int __cancel_type;
> > +};
> > +extern __inline void
> > +__pthread_cleanup_routine (struct __pthread_cleanup_frame *__frame)
> > +{
> > + if (__frame->__do_it)
> > + __frame->__cancel_routine (__frame->__cancel_arg);
> > +}
> > +static int cl_called;
> > +
> > +static void
> > +cl (void *arg)
> > +{
> > + ++cl_called;
> > +}
> > +
> > +
> > +void *
> > +tf_usleep (void *arg)
> > +{
> > +
> > + do { struct __pthread_cleanup_frame __clframe __attribute__
> > ((__cleanup__ (__pthread_cleanup_routine))) = { .__cancel_routine = (cl),
> > .__cancel_arg = (
> > +
> >
> > ((void *)0)), .__do_it = 1 };;
> > +
> > + foo (arg == ((void *)0) ? (0x7fffffffL * 2UL + 1UL) : 0);
> > +
> > + __clframe.__do_it = (0); } while (0);
> > +
> > + exit (1);
> > +}
> > --
> > 2.31.1
> >
--
H.J.
