From 087b12213a5b4b8654c70320c671bb05c1b1b012 Mon Sep 17 00:00:00 2001 From: "H.J. Lu" Date: Sat, 13 Jan 2018 18:01:54 -0800 Subject: [PATCH 08/13] x86: Disallow -mindirect-branch=/-mfunction-return= with -mcmodel=large Since the thunk function may not be reachable in large code model, -mcmodel=large is incompatible with -mindirect-branch=thunk, -mindirect-branch=thunk-extern, -mfunction-return=thunk and -mfunction-return=thunk-extern. Issue an error when they are used with -mcmodel=large. gcc/ Backport from mainline 2018-01-14 H.J. Lu * config/i386/i386.c (ix86_set_indirect_branch_type): Disallow -mcmodel=large with -mindirect-branch=thunk, -mindirect-branch=thunk-extern, -mfunction-return=thunk and -mfunction-return=thunk-extern. * doc/invoke.texi: Document -mcmodel=large is incompatible with -mindirect-branch=thunk, -mindirect-branch=thunk-extern, -mfunction-return=thunk and -mfunction-return=thunk-extern. gcc/testsuite/ Backport from mainline 2018-01-14 H.J. Lu * gcc.target/i386/indirect-thunk-10.c: New test. * gcc.target/i386/indirect-thunk-8.c: Likewise. * gcc.target/i386/indirect-thunk-9.c: Likewise. * gcc.target/i386/indirect-thunk-attr-10.c: Likewise. * gcc.target/i386/indirect-thunk-attr-11.c: Likewise. * gcc.target/i386/indirect-thunk-attr-9.c: Likewise. * gcc.target/i386/ret-thunk-17.c: Likewise. * gcc.target/i386/ret-thunk-18.c: Likewise. * gcc.target/i386/ret-thunk-19.c: Likewise. * gcc.target/i386/ret-thunk-20.c: Likewise. * gcc.target/i386/ret-thunk-21.c: Likewise. --- gcc/config/i386/i386.c | 26 ++++++++++++++++++++++ gcc/doc/invoke.texi | 11 +++++++++ gcc/testsuite/gcc.target/i386/indirect-thunk-10.c | 7 ++++++ gcc/testsuite/gcc.target/i386/indirect-thunk-8.c | 7 ++++++ gcc/testsuite/gcc.target/i386/indirect-thunk-9.c | 7 ++++++ .../gcc.target/i386/indirect-thunk-attr-10.c | 9 ++++++++ .../gcc.target/i386/indirect-thunk-attr-11.c | 9 ++++++++ .../gcc.target/i386/indirect-thunk-attr-9.c | 9 ++++++++ gcc/testsuite/gcc.target/i386/ret-thunk-17.c | 7 ++++++ gcc/testsuite/gcc.target/i386/ret-thunk-18.c | 8 +++++++ gcc/testsuite/gcc.target/i386/ret-thunk-19.c | 8 +++++++ gcc/testsuite/gcc.target/i386/ret-thunk-20.c | 9 ++++++++ gcc/testsuite/gcc.target/i386/ret-thunk-21.c | 9 ++++++++ 13 files changed, 126 insertions(+) create mode 100644 gcc/testsuite/gcc.target/i386/indirect-thunk-10.c create mode 100644 gcc/testsuite/gcc.target/i386/indirect-thunk-8.c create mode 100644 gcc/testsuite/gcc.target/i386/indirect-thunk-9.c create mode 100644 gcc/testsuite/gcc.target/i386/indirect-thunk-attr-10.c create mode 100644 gcc/testsuite/gcc.target/i386/indirect-thunk-attr-11.c create mode 100644 gcc/testsuite/gcc.target/i386/indirect-thunk-attr-9.c create mode 100644 gcc/testsuite/gcc.target/i386/ret-thunk-17.c create mode 100644 gcc/testsuite/gcc.target/i386/ret-thunk-18.c create mode 100644 gcc/testsuite/gcc.target/i386/ret-thunk-19.c create mode 100644 gcc/testsuite/gcc.target/i386/ret-thunk-20.c create mode 100644 gcc/testsuite/gcc.target/i386/ret-thunk-21.c diff --git a/gcc/config/i386/i386.c b/gcc/config/i386/i386.c index eeca7e5e490..9c038bee000 100644 --- a/gcc/config/i386/i386.c +++ b/gcc/config/i386/i386.c @@ -6389,6 +6389,19 @@ ix86_set_indirect_branch_type (tree fndecl) } else cfun->machine->indirect_branch_type = ix86_indirect_branch; + + /* -mcmodel=large is not compatible with -mindirect-branch=thunk + nor -mindirect-branch=thunk-extern. */ + if ((ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC) + && ((cfun->machine->indirect_branch_type + == indirect_branch_thunk_extern) + || (cfun->machine->indirect_branch_type + == indirect_branch_thunk))) + error ("%<-mindirect-branch=%s%> and %<-mcmodel=large%> are not " + "compatible", + ((cfun->machine->indirect_branch_type + == indirect_branch_thunk_extern) + ? "thunk-extern" : "thunk")); } if (cfun->machine->function_return_type == indirect_branch_unset) @@ -6414,6 +6427,19 @@ ix86_set_indirect_branch_type (tree fndecl) } else cfun->machine->function_return_type = ix86_function_return; + + /* -mcmodel=large is not compatible with -mfunction-return=thunk + nor -mfunction-return=thunk-extern. */ + if ((ix86_cmodel == CM_LARGE || ix86_cmodel == CM_LARGE_PIC) + && ((cfun->machine->function_return_type + == indirect_branch_thunk_extern) + || (cfun->machine->function_return_type + == indirect_branch_thunk))) + error ("%<-mfunction-return=%s%> and %<-mcmodel=large%> are not " + "compatible", + ((cfun->machine->function_return_type + == indirect_branch_thunk_extern) + ? "thunk-extern" : "thunk")); } } diff --git a/gcc/doc/invoke.texi b/gcc/doc/invoke.texi index 94374661f2d..1dee495c86b 100644 --- a/gcc/doc/invoke.texi +++ b/gcc/doc/invoke.texi @@ -24242,6 +24242,11 @@ to external call and return thunk provided in a separate object file. You can control this behavior for a specific function by using the function attribute @code{indirect_branch}. @xref{Function Attributes}. +Note that @option{-mcmodel=large} is incompatible with +@option{-mindirect-branch=thunk} nor +@option{-mindirect-branch=thunk-extern} since the thunk function may +not be reachable in large code model. + @item -mfunction-return=@var{choice} @opindex -mfunction-return Convert function return with @var{choice}. The default is @samp{keep}, @@ -24253,6 +24258,12 @@ object file. You can control this behavior for a specific function by using the function attribute @code{function_return}. @xref{Function Attributes}. +Note that @option{-mcmodel=large} is incompatible with +@option{-mfunction-return=thunk} nor +@option{-mfunction-return=thunk-extern} since the thunk function may +not be reachable in large code model. + + @item -mindirect-branch-register @opindex -mindirect-branch-register Force indirect call and jump via register. diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-10.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-10.c new file mode 100644 index 00000000000..a0674bd2363 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-10.c @@ -0,0 +1,7 @@ +/* { dg-do compile { target { lp64 } } } */ +/* { dg-options "-O2 -mindirect-branch=thunk-inline -mfunction-return=keep -mcmodel=large" } */ + +void +bar (void) +{ +} diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-8.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-8.c new file mode 100644 index 00000000000..7a80a8986e8 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-8.c @@ -0,0 +1,7 @@ +/* { dg-do compile { target { lp64 } } } */ +/* { dg-options "-O2 -mindirect-branch=thunk -mfunction-return=keep -mcmodel=large" } */ + +void +bar (void) +{ /* { dg-error "'-mindirect-branch=thunk' and '-mcmodel=large' are not compatible" } */ +} diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-9.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-9.c new file mode 100644 index 00000000000..d4d45c5114d --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-9.c @@ -0,0 +1,7 @@ +/* { dg-do compile { target { lp64 } } } */ +/* { dg-options "-O2 -mindirect-branch=thunk-extern -mfunction-return=keep -mcmodel=large" } */ + +void +bar (void) +{ /* { dg-error "'-mindirect-branch=thunk-extern' and '-mcmodel=large' are not compatible" } */ +} diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-10.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-10.c new file mode 100644 index 00000000000..3a2aeaddbc5 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-10.c @@ -0,0 +1,9 @@ +/* { dg-do compile { target { lp64 } } } */ +/* { dg-options "-O2 -mindirect-branch=keep -mfunction-return=keep -mcmodel=large" } */ +/* { dg-additional-options "-fPIC" { target fpic } } */ + +__attribute__ ((indirect_branch("thunk-extern"))) +void +bar (void) +{ /* { dg-error "'-mindirect-branch=thunk-extern' and '-mcmodel=large' are not compatible" } */ +} diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-11.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-11.c new file mode 100644 index 00000000000..8e52f032b6c --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-11.c @@ -0,0 +1,9 @@ +/* { dg-do compile { target { lp64 } } } */ +/* { dg-options "-O2 -mindirect-branch=keep -mfunction-return=keep -mcmodel=large" } */ +/* { dg-additional-options "-fPIC" { target fpic } } */ + +__attribute__ ((indirect_branch("thunk-inline"))) +void +bar (void) +{ +} diff --git a/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-9.c b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-9.c new file mode 100644 index 00000000000..bdaa4f6911b --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/indirect-thunk-attr-9.c @@ -0,0 +1,9 @@ +/* { dg-do compile { target { lp64 } } } */ +/* { dg-options "-O2 -mindirect-branch=keep -mfunction-return=keep -mcmodel=large" } */ +/* { dg-additional-options "-fPIC" { target fpic } } */ + +__attribute__ ((indirect_branch("thunk"))) +void +bar (void) +{ /* { dg-error "'-mindirect-branch=thunk' and '-mcmodel=large' are not compatible" } */ +} diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-17.c b/gcc/testsuite/gcc.target/i386/ret-thunk-17.c new file mode 100644 index 00000000000..0605e2c6542 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/ret-thunk-17.c @@ -0,0 +1,7 @@ +/* { dg-do compile { target { lp64 } } } */ +/* { dg-options "-O2 -mfunction-return=thunk -mindirect-branch=keep -mcmodel=large" } */ + +void +bar (void) +{ /* { dg-error "'-mfunction-return=thunk' and '-mcmodel=large' are not compatible" } */ +} diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-18.c b/gcc/testsuite/gcc.target/i386/ret-thunk-18.c new file mode 100644 index 00000000000..307019dc242 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/ret-thunk-18.c @@ -0,0 +1,8 @@ +/* { dg-do compile { target { lp64 } } } */ +/* { dg-options "-O2 -mfunction-return=thunk-extern -mindirect-branch=keep -mcmodel=large" } */ +/* { dg-additional-options "-fPIC" { target fpic } } */ + +void +bar (void) +{ /* { dg-error "'-mfunction-return=thunk-extern' and '-mcmodel=large' are not compatible" } */ +} diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-19.c b/gcc/testsuite/gcc.target/i386/ret-thunk-19.c new file mode 100644 index 00000000000..772617f4010 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/ret-thunk-19.c @@ -0,0 +1,8 @@ +/* { dg-do compile { target { lp64 } } } */ +/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=keep -mcmodel=large" } */ + +__attribute__ ((function_return("thunk"))) +void +bar (void) +{ /* { dg-error "'-mfunction-return=thunk' and '-mcmodel=large' are not compatible" } */ +} diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-20.c b/gcc/testsuite/gcc.target/i386/ret-thunk-20.c new file mode 100644 index 00000000000..1e9f9bd5a66 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/ret-thunk-20.c @@ -0,0 +1,9 @@ +/* { dg-do compile { target { lp64 } } } */ +/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=keep -mcmodel=large" } */ +/* { dg-additional-options "-fPIC" { target fpic } } */ + +__attribute__ ((function_return("thunk-extern"))) +void +bar (void) +{ /* { dg-error "'-mfunction-return=thunk-extern' and '-mcmodel=large' are not compatible" } */ +} diff --git a/gcc/testsuite/gcc.target/i386/ret-thunk-21.c b/gcc/testsuite/gcc.target/i386/ret-thunk-21.c new file mode 100644 index 00000000000..eea07f7abe1 --- /dev/null +++ b/gcc/testsuite/gcc.target/i386/ret-thunk-21.c @@ -0,0 +1,9 @@ +/* { dg-do compile { target { lp64 } } } */ +/* { dg-options "-O2 -mfunction-return=keep -mindirect-branch=keep -mcmodel=large" } */ +/* { dg-additional-options "-fPIC" { target fpic } } */ + +__attribute__ ((function_return("thunk-inline"))) +void +bar (void) +{ +} -- 2.16.3