diff options
Diffstat (limited to 'sysdeps/unix/sysv/linux')
| -rw-r--r-- | sysdeps/unix/sysv/linux/sh/Makefile | 4 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/sh/____longjmp_chk.S | 113 | ||||
| -rw-r--r-- | sysdeps/unix/sysv/linux/sh/sigaltstack-offsets.sym | 13 |
3 files changed, 130 insertions, 0 deletions
diff --git a/sysdeps/unix/sysv/linux/sh/Makefile b/sysdeps/unix/sysv/linux/sh/Makefile index 1ead8f2ae3..dd3b382ac1 100644 --- a/sysdeps/unix/sysv/linux/sh/Makefile +++ b/sysdeps/unix/sysv/linux/sh/Makefile @@ -6,6 +6,10 @@ ifeq ($(subdir),stdlib) gen-as-const-headers += ucontext_i.sym endif +ifeq ($(subdir),misc) +gen-as-const-headers += sigaltstack-offsets.sym +endif + ifeq ($(subdir),math) # The libm.so link can't find __fpscr_values libm.so-no-z-defs = yes diff --git a/sysdeps/unix/sysv/linux/sh/____longjmp_chk.S b/sysdeps/unix/sysv/linux/sh/____longjmp_chk.S new file mode 100644 index 0000000000..d034afcf24 --- /dev/null +++ b/sysdeps/unix/sysv/linux/sh/____longjmp_chk.S @@ -0,0 +1,113 @@ +/* Copyright (C) 2009-2012 Free Software Foundation, Inc. + This file is part of the GNU C Library. + + The GNU C Library is free software; you can redistribute it and/or + modify it under the terms of the GNU Lesser General Public + License as published by the Free Software Foundation; either + version 2.1 of the License, or (at your option) any later version. + + The GNU C Library is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU + Lesser General Public License for more details. + + You should have received a copy of the GNU Lesser General Public + License along with the GNU C Library; if not, see + <http://www.gnu.org/licenses/>. */ + +#include <sysdep.h> + +#include <sigaltstack-offsets.h> + + .section .rodata.str1.1,"aMS",@progbits,1 + .type longjmp_msg,@object +longjmp_msg: + .string "longjmp causes uninitialized stack frame" + .size longjmp_msg, .-longjmp_msg + .text + +#define __longjmp ____longjmp_chk + +#ifdef PIC +# define CALL_FAIL \ + mov.l .Lfail, r1; \ + mov.l .Lstr, r4; \ + mova .Lgot, r0; \ + mov.l .Lgot, r12; \ + add r0, r12; \ + bsrf r1; \ + add r12, r4; \ +.Lfail0: \ + bra 0f; \ + nop; \ + .align 2; \ +.Lgot: \ + .long _GLOBAL_OFFSET_TABLE_; \ +.Lstr: \ + .long longjmp_msg@GOTOFF; \ +.Lfail: \ + .long __GI___fortify_fail@PLT-(.Lfail0-.); \ +0: +#else +# define CALL_FAIL \ + mov.l .Lfail, r1; \ + mov.l .Lstr, r4; \ + jsr @r1; \ + nop; \ + bra 0f; \ + nop; \ + .align 2; \ +.Lstr: \ + .long longjmp_msg; \ +.Lfail: \ + .long __fortify_fail; \ +0: +#endif + +#define CHECK_SP(reg) \ + /* Jumping to a higher-address frame is always allowed. */ \ + cmp/hs r15, reg; \ + bt .Lok; \ + \ + mov.l r0, @-r15; /* The return value is already in here. */ \ + cfi_adjust_cfa_offset (4); \ + mov.l r1, @-r15; /* PTR_DEMANGLE helper. */ \ + cfi_adjust_cfa_offset (4); \ + mov.l r2, @-r15; /* The new SP value is already in here. */ \ + cfi_adjust_cfa_offset (4); \ + mov.l r4, @-r15; /* We'll still need this one. */ \ + cfi_adjust_cfa_offset (4); \ + add #-sizeSS, r15; \ + cfi_adjust_cfa_offset (sizeSS); \ + mov #0, r4; \ + mov r15, r5; \ + DO_CALL (sigaltstack, 2); \ + /* Without working sigaltstack we cannot perform the test. */ \ + tst r0, r0; \ + bf .Lok2; \ + mov.l @(oSS_FLAGS, r15), r0; \ + tst #SS_ONSTACK, r0; \ + bt .Lcall_fail; \ + mov.l @(oSS_SIZE, r15), r2; \ + mov.l @(oSS_SP, r15), r1; \ + add r2, r1; \ + sub r8, r1; \ + cmp/hi r1, r2; \ + bf .Lok2; \ +.Lcall_fail: \ + CALL_FAIL \ + \ +.Lok2: \ + add #sizeSS, r15; \ + cfi_adjust_cfa_offset (-sizeSS); \ + mov.l @r15+, r4; \ + cfi_adjust_cfa_offset (-4); \ + mov.l @r15+, r2; \ + cfi_adjust_cfa_offset (-4); \ + mov.l @r15+, r1; \ + cfi_adjust_cfa_offset (-4); \ + mov.l @r15+, r0; \ + cfi_adjust_cfa_offset (-4); \ +.Lok: + +#include <__longjmp.S> diff --git a/sysdeps/unix/sysv/linux/sh/sigaltstack-offsets.sym b/sysdeps/unix/sysv/linux/sh/sigaltstack-offsets.sym new file mode 100644 index 0000000000..f73446941a --- /dev/null +++ b/sysdeps/unix/sysv/linux/sh/sigaltstack-offsets.sym @@ -0,0 +1,13 @@ +#include <stddef.h> +#include <signal.h> + +-- + +#define sigaltstack(member) offsetof (stack_t, member) + +sizeSS sizeof (stack_t) +oSS_SP sigaltstack (ss_sp) +oSS_FLAGS sigaltstack (ss_flags) +oSS_SIZE sigaltstack (ss_size) + +SS_ONSTACK |