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| author | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-06-26 16:06:49 -0300 |
|---|---|---|
| committer | Adhemerval Zanella <adhemerval.zanella@linaro.org> | 2020-12-10 17:42:37 -0300 |
| commit | 720480934ab9107714f1ffc29222dfb5d3bc5b1d (patch) | |
| tree | 3851a6f8fe50b3548e667651805dadb7c242f43b /sysdeps/unix/sysv | |
| parent | 880433de13fa31e52587720f81b762a6c7797e4e (diff) | |
| download | glibc-720480934ab9107714f1ffc29222dfb5d3bc5b1d.tar.gz glibc-720480934ab9107714f1ffc29222dfb5d3bc5b1d.tar.xz glibc-720480934ab9107714f1ffc29222dfb5d3bc5b1d.zip | |
linux: Consolidate brk implementation
It removes all the arch-specific assembly implementation. The outliers are alpha, where its kernel ABI explict return -ENOMEM in case of failure; and i686, where it can't use "call *%gs:SYSINFO_OFFSET" during statup in static PIE. Also some ABIs exports an additional ___brk_addr symbol and to handle it an internal HAVE_INTERNAL_BRK_ADDR_SYMBOL is added. Checked on x86_64-linux-gnu, i686-linux-gnu, adn with builsd for the affected ABIs. Reviewed-by: Tulio Magno Quites Machado Filho <tuliom@linux.ibm.com>
Diffstat (limited to 'sysdeps/unix/sysv')
36 files changed, 60 insertions, 745 deletions
diff --git a/sysdeps/unix/sysv/linux/aarch64/sysdep.h b/sysdeps/unix/sysv/linux/aarch64/sysdep.h index 319a7c7ac5..e526328ea4 100644 --- a/sysdeps/unix/sysv/linux/aarch64/sysdep.h +++ b/sysdeps/unix/sysv/linux/aarch64/sysdep.h @@ -234,6 +234,9 @@ # define INTERNAL_SYSCALL_NCS(number, nr, args...) \ INTERNAL_SYSCALL_RAW (number, nr, args) +#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #endif /* __ASSEMBLER__ */ /* Pointer mangling is supported for AArch64. */ diff --git a/sysdeps/unix/sysv/linux/alpha/brk.S b/sysdeps/unix/sysv/linux/alpha/brk.S deleted file mode 100644 index 5596b346d8..0000000000 --- a/sysdeps/unix/sysv/linux/alpha/brk.S +++ /dev/null @@ -1,83 +0,0 @@ -/* Copyright (C) 1993-2020 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Brendan Kehoe <brendan@zen.org>, 1993. - - 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 - <https://www.gnu.org/licenses/>. */ - -/* __brk is a special syscall under Linux since it never returns an - error. Instead, the error condition is indicated by returning the old - break value (instead of the new, requested one). */ - -#include <sysdep.h> -#include <errno.h> - -#ifdef PIC -.section .bss - .align 3 - .globl __curbrk -__curbrk: .skip 8 - .type __curbrk,@object - .size __curbrk,8 -#else -.comm __curbrk, 8 -#endif - - .text - .align 4 - .globl __brk - .ent __brk - .usepv __brk, std - - cfi_startproc -__brk: - ldgp gp, 0(t12) - subq sp, 16, sp - cfi_adjust_cfa_offset (16) -#ifdef PROF - .set noat - lda AT, _mcount - jsr AT, (AT), _mcount - .set at -#endif - - /* Save the requested brk across the system call. */ - stq a0, 0(sp) - - ldiq v0, __NR_brk - call_pal PAL_callsys - - ldq a0, 0(sp) - addq sp, 16, sp - cfi_adjust_cfa_offset (-16) - - /* Be prepared for an OSF-style brk. */ - bne a3, SYSCALL_ERROR_LABEL - beq v0, $ok - - /* Correctly handle the brk(0) query case. */ - cmoveq a0, v0, a0 - xor a0, v0, t0 - lda v0, ENOMEM - bne t0, SYSCALL_ERROR_LABEL - - /* Update __curbrk and return cleanly. */ - lda v0, 0 -$ok: stq a0, __curbrk - ret - -PSEUDO_END(__brk) - cfi_endproc - -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/arm/brk.c b/sysdeps/unix/sysv/linux/alpha/brk.c index d4878939ae..d105a50724 100644 --- a/sysdeps/unix/sysv/linux/arm/brk.c +++ b/sysdeps/unix/sysv/linux/alpha/brk.c @@ -1,5 +1,5 @@ -/* brk system call for Linux/ARM. - Copyright (C) 1995-2020 Free Software Foundation, Inc. +/* Change data segment size. Linux/Alpha. + Copyright (C) 2020 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 @@ -20,17 +20,14 @@ #include <unistd.h> #include <sysdep.h> -/* This must be initialized data because commons can't have aliases. */ void *__curbrk = 0; int __brk (void *addr) { - void *newbrk; - - __curbrk = newbrk = (void *) INLINE_SYSCALL (brk, 1, addr); - - if (newbrk < addr) + /* Alpha brk returns -ENOMEM in case of failure. */ + __curbrk = (void *) INTERNAL_SYSCALL_CALL (brk, addr); + if ((unsigned long) __curbrk == -ENOMEM) { __set_errno (ENOMEM); return -1; diff --git a/sysdeps/unix/sysv/linux/alpha/dl-brk.S b/sysdeps/unix/sysv/linux/alpha/dl-brk.S deleted file mode 100644 index eeb96544e3..0000000000 --- a/sysdeps/unix/sysv/linux/alpha/dl-brk.S +++ /dev/null @@ -1 +0,0 @@ -#include <brk.S> diff --git a/sysdeps/unix/sysv/linux/arc/sysdep.h b/sysdeps/unix/sysv/linux/arc/sysdep.h index 8465a2f623..24d8866d66 100644 --- a/sysdeps/unix/sysv/linux/arc/sysdep.h +++ b/sysdeps/unix/sysv/linux/arc/sysdep.h @@ -221,6 +221,9 @@ hidden_proto (__syscall_error) # define PTR_MANGLE(var) (void) (var) # define PTR_DEMANGLE(var) (void) (var) +# undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +# define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #endif /* !__ASSEMBLER__ */ #endif /* linux/arc/sysdep.h */ diff --git a/sysdeps/unix/sysv/linux/generic/brk.c b/sysdeps/unix/sysv/linux/brk.c index 40a80ab970..0b6d6d0b70 100644 --- a/sysdeps/unix/sysv/linux/generic/brk.c +++ b/sysdeps/unix/sysv/linux/brk.c @@ -1,6 +1,6 @@ -/* Copyright (C) 2011-2020 Free Software Foundation, Inc. +/* Change data segment. Linux generic version. + Copyright (C) 2020 Free Software Foundation, Inc. This file is part of the GNU C Library. - Contributed by Chris Metcalf <cmetcalf@tilera.com>, 2011. The GNU C Library is free software; you can redistribute it and/or modify it under the terms of the GNU Lesser General Public @@ -23,10 +23,12 @@ /* This must be initialized data because commons can't have aliases. */ void *__curbrk = 0; +#if HAVE_INTERNAL_BRK_ADDR_SYMBOL /* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt to work around different old braindamage in the old Linux ELF dynamic linker. */ weak_alias (__curbrk, ___brk_addr) +#endif int __brk (void *addr) diff --git a/sysdeps/unix/sysv/linux/csky/sysdep.h b/sysdeps/unix/sysv/linux/csky/sysdep.h index 7e8e89dd42..92216572a6 100644 --- a/sysdeps/unix/sysv/linux/csky/sysdep.h +++ b/sysdeps/unix/sysv/linux/csky/sysdep.h @@ -461,6 +461,9 @@ __local_syscall_error: \ # define INTERNAL_SYSCALL_NCS(number, nr, args...) \ INTERNAL_SYSCALL_RAW##nr (number, args) +#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #endif /* __ASSEMBLER__ */ /* Pointer mangling support. */ diff --git a/sysdeps/unix/sysv/linux/dl-brk.c b/sysdeps/unix/sysv/linux/dl-brk.c deleted file mode 100644 index c37cdfec33..0000000000 --- a/sysdeps/unix/sysv/linux/dl-brk.c +++ /dev/null @@ -1,5 +0,0 @@ -/* We can use the normal code but we also know the __curbrk is not exported - from ld.so. */ -extern void *__curbrk attribute_hidden; - -#include <brk.c> diff --git a/sysdeps/unix/sysv/linux/hppa/brk.c b/sysdeps/unix/sysv/linux/hppa/brk.c deleted file mode 100644 index 89d1fd1835..0000000000 --- a/sysdeps/unix/sysv/linux/hppa/brk.c +++ /dev/null @@ -1,41 +0,0 @@ -/* brk system call for Linux/HPPA. - Copyright (C) 1995-2020 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 - <https://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <unistd.h> -#include <sysdep.h> - -/* This must be initialized data because commons can't have aliases. */ -void *__curbrk = 0; - -int -__brk (void *addr) -{ - void *newbrk; - - __curbrk = newbrk = (void *) INLINE_SYSCALL (brk, 1, addr); - - if (newbrk < addr) - { - __set_errno (ENOMEM); - return -1; - } - - return 0; -} -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/i386/brk.c b/sysdeps/unix/sysv/linux/i386/brk.c index 021b6d37a0..8d7b7d42cc 100644 --- a/sysdeps/unix/sysv/linux/i386/brk.c +++ b/sysdeps/unix/sysv/linux/i386/brk.c @@ -21,25 +21,4 @@ # define I386_USE_SYSENTER 0 #endif -#include <errno.h> -#include <unistd.h> -#include <sysdep.h> - -/* This must be initialized data because commons can't have aliases. */ -void *__curbrk = 0; - -/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt - to work around different old braindamage in the old Linux ELF dynamic - linker. */ -weak_alias (__curbrk, ___brk_addr) - -int -__brk (void *addr) -{ - void *newbrk = (void *) INTERNAL_SYSCALL_CALL (brk, addr); - __curbrk = newbrk; - if (newbrk < addr) - return INLINE_SYSCALL_ERROR_RETURN_VALUE (ENOMEM); - return 0; -} -weak_alias (__brk, brk) +#include <sysdeps/unix/sysv/linux/brk.c> diff --git a/sysdeps/unix/sysv/linux/i386/sysdep.h b/sysdeps/unix/sysv/linux/i386/sysdep.h index bfb5de3b45..addd13dff1 100644 --- a/sysdeps/unix/sysv/linux/i386/sysdep.h +++ b/sysdeps/unix/sysv/linux/i386/sysdep.h @@ -291,6 +291,9 @@ struct libc_do_syscall_args # define HAVE_TIME_VSYSCALL "__vdso_time" # define HAVE_CLOCK_GETRES_VSYSCALL "__vdso_clock_getres" +# undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +# define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + /* Define a macro which expands inline into the wrapper code for a system call. This use is for internal calls that do not need to handle errors normally. It will never touch errno. This returns just what the kernel diff --git a/sysdeps/unix/sysv/linux/ia64/brk.S b/sysdeps/unix/sysv/linux/ia64/brk.S deleted file mode 100644 index 734d3467a7..0000000000 --- a/sysdeps/unix/sysv/linux/ia64/brk.S +++ /dev/null @@ -1,50 +0,0 @@ -/* brk system call for Linux/ia64 - Copyright (C) 1999-2020 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Written by Stéphane Eranian <eranian@hpl.hp.com> and - Jes Sorensen, <Jes.Sorensen@cern.ch>, April 1999. - - 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 - <https://www.gnu.org/licenses/>. */ - -#include <sysdep.h> - -#include <asm/errno.h> - - .global __curbrk - .type __curbrk,@object - .size __curbrk,8 - .data - .align 8 -__curbrk: - data8 0 - -weak_alias (__curbrk, ___brk_addr) - -LEAF(__brk) - .regstk 1, 0, 0, 0 - DO_CALL(__NR_brk) - cmp.ltu p6, p0 = ret0, in0 - addl r9 = @ltoff(__curbrk), gp - ;; - ld8 r9 = [r9] -(p6) mov ret0 = ENOMEM -(p6) br.cond.spnt.few __syscall_error - ;; - st8 [r9] = ret0 - mov ret0 = 0 - ret -END(__brk) - -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/ia64/dl-brk.S b/sysdeps/unix/sysv/linux/ia64/dl-brk.S deleted file mode 100644 index eeb96544e3..0000000000 --- a/sysdeps/unix/sysv/linux/ia64/dl-brk.S +++ /dev/null @@ -1 +0,0 @@ -#include <brk.S> diff --git a/sysdeps/unix/sysv/linux/ia64/sysdep.h b/sysdeps/unix/sysv/linux/ia64/sysdep.h index 03ed52552e..e6bcaabecc 100644 --- a/sysdeps/unix/sysv/linux/ia64/sysdep.h +++ b/sysdeps/unix/sysv/linux/ia64/sysdep.h @@ -172,6 +172,9 @@ #else /* not __ASSEMBLER__ */ +#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #define BREAK_INSN_1(num) "break " #num ";;\n\t" #define BREAK_INSN(num) BREAK_INSN_1(num) diff --git a/sysdeps/unix/sysv/linux/m68k/brk.c b/sysdeps/unix/sysv/linux/m68k/brk.c deleted file mode 100644 index ee88acbdc4..0000000000 --- a/sysdeps/unix/sysv/linux/m68k/brk.c +++ /dev/null @@ -1,46 +0,0 @@ -/* brk system call for Linux/m68k. - Copyright (C) 1996-2020 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 - <https://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <unistd.h> -#include <sysdep.h> - -void *__curbrk = 0; - -/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt - to work around different old braindamage in the old Linux/x86 ELF - dynamic linker. Sigh. */ -weak_alias (__curbrk, ___brk_addr) - -int -__brk (void *addr) -{ - void *newbrk; - - newbrk = (void *) INTERNAL_SYSCALL_CALL (brk, addr); - __curbrk = newbrk; - - if (newbrk < addr) - { - __set_errno (ENOMEM); - return -1; - } - - return 0; -} -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/m68k/sysdep.h b/sysdeps/unix/sysv/linux/m68k/sysdep.h index 3e0ab605de..fe7cf5babb 100644 --- a/sysdeps/unix/sysv/linux/m68k/sysdep.h +++ b/sysdeps/unix/sysv/linux/m68k/sysdep.h @@ -292,6 +292,9 @@ SYSCALL_ERROR_LABEL: \ LOAD_REGS_5 #define ASM_ARGS_6 ASM_ARGS_5, "a" (_a0) +#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #endif /* not __ASSEMBLER__ */ /* Pointer mangling is not yet supported for M68K. */ diff --git a/sysdeps/unix/sysv/linux/microblaze/brk.c b/sysdeps/unix/sysv/linux/microblaze/brk.c deleted file mode 100644 index 20c3e625e4..0000000000 --- a/sysdeps/unix/sysv/linux/microblaze/brk.c +++ /dev/null @@ -1,42 +0,0 @@ -/* Copyright (C) 2011-2020 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 - <https://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <unistd.h> -#include <sysdep.h> - -/* This must be initialized data because commons can't have aliases. */ -void *__curbrk = 0; - -/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt - to work around different old braindamage in the old Linux ELF dynamic - linker. */ -weak_alias (__curbrk, ___brk_addr) - -int -__brk (void *addr) -{ - __curbrk = (void *) INTERNAL_SYSCALL_CALL (brk, addr); - if (__curbrk < addr) - { - __set_errno (ENOMEM); - return -1; - } - - return 0; -} -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/microblaze/sysdep.h b/sysdeps/unix/sysv/linux/microblaze/sysdep.h index 6fd96adbf0..fb1e648b63 100644 --- a/sysdeps/unix/sysv/linux/microblaze/sysdep.h +++ b/sysdeps/unix/sysv/linux/microblaze/sysdep.h @@ -310,6 +310,9 @@ SYSCALL_ERROR_LABEL_DCL: \ # define SINGLE_THREAD_BY_GLOBAL 1 +#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #endif /* not __ASSEMBLER__ */ #endif /* _LINUX_MICROBLAZE_SYSDEP_H */ diff --git a/sysdeps/unix/sysv/linux/mips/brk.c b/sysdeps/unix/sysv/linux/mips/brk.c deleted file mode 100644 index 0335837948..0000000000 --- a/sysdeps/unix/sysv/linux/mips/brk.c +++ /dev/null @@ -1,46 +0,0 @@ -/* brk system call for Linux/MIPS. - Copyright (C) 2000-2020 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 - <https://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <unistd.h> -#include <sysdep.h> - -void *__curbrk = 0; - -/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt - to work around different old braindamage in the old Linux/x86 ELF - dynamic linker. Sigh. */ -weak_alias (__curbrk, ___brk_addr) - -int -__brk (void *addr) -{ - void *newbrk; - - newbrk = (void *) INTERNAL_SYSCALL_CALL (brk, addr); - __curbrk = newbrk; - - if (newbrk < addr) - { - __set_errno (ENOMEM); - return -1; - } - - return 0; -} -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h b/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h index c5bcd90c25..49856c3249 100644 --- a/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h +++ b/sysdeps/unix/sysv/linux/mips/mips32/sysdep.h @@ -43,6 +43,9 @@ #else /* ! __ASSEMBLER__ */ +#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + /* Note that the original Linux syscall restart convention required the instruction immediately preceding SYSCALL to initialize $v0 with the syscall number. Then if a restart triggered, $v0 would have been diff --git a/sysdeps/unix/sysv/linux/mips/mips64/sysdep.h b/sysdeps/unix/sysv/linux/mips/mips64/sysdep.h index 1882fe4e73..73816816d5 100644 --- a/sysdeps/unix/sysv/linux/mips/mips64/sysdep.h +++ b/sysdeps/unix/sysv/linux/mips/mips64/sysdep.h @@ -41,6 +41,9 @@ #else /* ! __ASSEMBLER__ */ +#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #if _MIPS_SIM == _ABIN32 /* Convert X to a long long, without losing any bits if it is one already or warning if it is a 32-bit pointer. */ diff --git a/sysdeps/unix/sysv/linux/nios2/sysdep.h b/sysdeps/unix/sysv/linux/nios2/sysdep.h index 520c9460a2..51f736fb95 100644 --- a/sysdeps/unix/sysv/linux/nios2/sysdep.h +++ b/sysdeps/unix/sysv/linux/nios2/sysdep.h @@ -219,6 +219,9 @@ #define __SYSCALL_CLOBBERS "memory" +#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #endif /* __ASSEMBLER__ */ /* Pointer mangling support. */ diff --git a/sysdeps/unix/sysv/linux/powerpc/dl-brk.S b/sysdeps/unix/sysv/linux/powerpc/dl-brk.S deleted file mode 100644 index eeb96544e3..0000000000 --- a/sysdeps/unix/sysv/linux/powerpc/dl-brk.S +++ /dev/null @@ -1 +0,0 @@ -#include <brk.S> diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc32/brk.S b/sysdeps/unix/sysv/linux/powerpc/powerpc32/brk.S deleted file mode 100644 index f3b960795e..0000000000 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc32/brk.S +++ /dev/null @@ -1,52 +0,0 @@ -/* brk system call for Linux/ppc. - Copyright (C) 1995-2020 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 - <https://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#define _ERRNO_H 1 -#include <bits/errno.h> - - .comm __curbrk,4,4 - .section ".text" -ENTRY (__brk) - mflr r0 - stwu r1,-16(r1) - cfi_adjust_cfa_offset (16) - stw r3,8(r1) - stw r0,20(r1) - cfi_offset (lr, 4) - DO_CALL(SYS_ify(brk)) - lwz r6,8(r1) -#ifdef PIC - SETUP_GOT_ACCESS(r5,got_label) - addis r5,r5,__curbrk-got_label@ha - stw r3,__curbrk-got_label@l(r5) -#else - lis r4,__curbrk@ha - stw r3,__curbrk@l(r4) -#endif - lwz r0,20(r1) - cmplw r6,r3 - addi r1,r1,16 - mtlr r0 - li r3,0 - blelr+ - li r3,ENOMEM - b __syscall_error@local -END (__brk) - -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/powerpc/powerpc64/brk.S b/sysdeps/unix/sysv/linux/powerpc/powerpc64/brk.S deleted file mode 100644 index f206909b72..0000000000 --- a/sysdeps/unix/sysv/linux/powerpc/powerpc64/brk.S +++ /dev/null @@ -1,43 +0,0 @@ -/* brk system call for Linux. PowerPC64 version. - Copyright (C) 1995-2020 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 - <https://www.gnu.org/licenses/>. */ - -#include <sysdep.h> -#define _ERRNO_H 1 -#include <bits/errno.h> - - .comm __curbrk,8,8 - .section ".toc","aw" -.LC__curbrk: - .tc __curbrk[TC],__curbrk - .section ".text" -ENTRY (__brk) - CALL_MCOUNT 1 - - std r3,-8(r1) - DO_CALL(SYS_ify(brk)) - ld r6,-8(r1) - ld r5,.LC__curbrk@toc(r2) - std r3,0(r5) - cmpld r6,r3 - li r3,0 - blelr+ - li r3,ENOMEM - TAIL_CALL_SYSCALL_ERROR -END (__brk) - -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/riscv/sysdep.h b/sysdeps/unix/sysv/linux/riscv/sysdep.h index e94afbf106..37ff07a0d7 100644 --- a/sysdeps/unix/sysv/linux/riscv/sysdep.h +++ b/sysdeps/unix/sysv/linux/riscv/sysdep.h @@ -155,6 +155,9 @@ RV64). */ # define HAVE_GETCPU_VSYSCALL "__vdso_getcpu" +# undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +# define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + # define INTERNAL_SYSCALL(name, nr, args...) \ internal_syscall##nr (SYS_ify (name), args) diff --git a/sysdeps/unix/sysv/linux/s390/brk.c b/sysdeps/unix/sysv/linux/s390/brk.c deleted file mode 100644 index ca3a730f83..0000000000 --- a/sysdeps/unix/sysv/linux/s390/brk.c +++ /dev/null @@ -1,55 +0,0 @@ -/* - Copyright (C) 2000-2020 Free Software Foundation, Inc. - Contributed by Martin Schwidefsky (schwidefsky@de.ibm.com). - 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 - <https://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <unistd.h> -#include <sysdep.h> - -void *__curbrk = 0; - -/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt - to work around different old braindamage in the old Linux/x86 ELF - dynamic linker. Sigh. */ -weak_alias (__curbrk, ___brk_addr) - -int -__brk (void *addr) -{ - void *newbrk; - - { - register void *__addr __asm__("2") = addr; - - __asm__ ("svc %b1\n\t" /* call sys_brk */ - : "=d" (__addr) - : "I" (SYS_ify(brk)), "r" (__addr) - : "cc", "memory" ); - newbrk = __addr; - } - __curbrk = newbrk; - - if (newbrk < addr) - { - __set_errno (ENOMEM); - return -1; - } - - return 0; -} -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h index 26b0410cf3..26836620f2 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h +++ b/sysdeps/unix/sysv/linux/s390/s390-32/sysdep.h @@ -175,6 +175,11 @@ #define ret_ERRVAL \ br 14 +#else + +# undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +# define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #endif /* __ASSEMBLER__ */ /* Pointer mangling support. */ diff --git a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h index 39831a2ec2..7211dadbfd 100644 --- a/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h +++ b/sysdeps/unix/sysv/linux/s390/s390-64/sysdep.h @@ -173,6 +173,11 @@ #define ret_ERRVAL \ br 14 +#else + +# undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +# define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #endif /* __ASSEMBLER__ */ /* Pointer mangling support. */ diff --git a/sysdeps/unix/sysv/linux/sh/brk.c b/sysdeps/unix/sysv/linux/sh/brk.c deleted file mode 100644 index 5225d9bfc4..0000000000 --- a/sysdeps/unix/sysv/linux/sh/brk.c +++ /dev/null @@ -1,47 +0,0 @@ -/* brk system call for Linux/SH. - Copyright (C) 1999-2020 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 - <https://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <unistd.h> -#include <sysdep.h> - -/* This must be initialized data because commons can't have aliases. */ -void *__curbrk = 0; - -int -__brk (void *addr) -{ - void *newbrk; - register long r3 asm ("%r3") = SYS_ify (brk); - register long r4 asm ("%r4") = (long)addr; - - asm volatile ("trapa #0x11\n\t" SYSCALL_INST_PAD - : "=z"(newbrk) - : "r" (r3), "r" (r4)); - - __curbrk = newbrk; - - if (newbrk < addr) - { - __set_errno (ENOMEM); - return -1; - } - - return 0; -} -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/brk.c b/sysdeps/unix/sysv/linux/sparc/sparc32/brk.c deleted file mode 100644 index ba9a616f74..0000000000 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/brk.c +++ /dev/null @@ -1,54 +0,0 @@ -/* brk system call for Linux/SPARC. - Copyright (C) 1995-2020 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Miguel de Icaza (miguel@nuclecu.unam.mx) - - 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 - <https://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <unistd.h> -#include <sysdep.h> - -/* This must be initialized data because commons can't have aliases. */ -void *__curbrk = 0; - -/* Old braindamage in GCC's crtstuff.c requires this symbol in an attempt - to work around different old braindamage in the old Linux ELF dynamic - linker. */ -weak_alias (__curbrk, ___brk_addr) - -int -__brk (void *addr) -{ - void *newbrk; - - { - register void *o0 __asm__("%o0") = addr; - register int g1 __asm__("%g1") = __NR_brk; - __asm ("t 0x10" : "=r"(o0) : "r"(g1), "0"(o0) : "cc"); - newbrk = o0; - } - - __curbrk = newbrk; - - if (newbrk < addr) - { - __set_errno (ENOMEM); - return -1; - } - - return 0; -} -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h index 2c3754770b..018ee5781e 100644 --- a/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h +++ b/sysdeps/unix/sysv/linux/sparc/sparc32/sysdep.h @@ -121,6 +121,9 @@ ENTRY(name); \ "f24", "f25", "f26", "f27", "f28", "f29", "f30", "f31", \ "cc", "memory" +#undef HAVE_INTERNAL_BRK_ADDR_SYMBOL +#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 1 + #endif /* __ASSEMBLER__ */ /* Pointer mangling support. */ diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/brk.S b/sysdeps/unix/sysv/linux/sparc/sparc64/brk.S deleted file mode 100644 index 471da3d268..0000000000 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/brk.S +++ /dev/null @@ -1,104 +0,0 @@ -/* Copyright (C) 1997-2020 Free Software Foundation, Inc. - This file is part of the GNU C Library. - Contributed by Richard Henderson <richard@gnu.ai.mit.edu>, 1997. - - 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 - <https://www.gnu.org/licenses/>. */ - -/* __brk is a special syscall under Linux since it never returns an - error. Instead, the error condition is indicated by returning the old - break value (instead of the new, requested one). */ - -#include <sysdep.h> -#include <errno.h> - -#ifdef PIC -.section .bss - .align 8 - .globl __curbrk -__curbrk: .skip 8 - .type __curbrk,@object - .size __curbrk,8 -#else -.common __curbrk, 8, 8 -#endif - - .text -ENTRY (__brk) - save %sp, -192, %sp - cfi_def_cfa_register(%fp) - cfi_window_save - cfi_register(%o7, %i7) -#ifdef PIC - SETUP_PIC_REG(l7) -#endif - - LOADSYSCALL(brk) - mov %i0, %o0 - - ta 0x6d - - /* All the ways we can fail... */ - bcs,pn %xcc, .Lerr1 - nop - brz,pt %i0, .Lok - subcc %i0, %o0, %g0 - bne,pn %xcc, .Lerr0 - nop - - /* Update __curbrk and return cleanly. */ -.Lok: -#ifndef PIC - sethi %hi(__curbrk), %g1 - or %g1, %lo(__curbrk), %g1 -#else - sethi %gdop_hix22(__curbrk), %g1 - xor %g1, %gdop_lox10(__curbrk), %g1 - ldx [%l7 + %g1], %g1, %gdop(__curbrk) -#endif - stx %o0, [%g1] - mov %g0, %i0 - - /* Don't use "ret" cause the preprocessor will eat it. */ - jmpl %i7+8, %g0 - restore - - /* What a horrible way to die. */ -.Lerr0: set ENOMEM, %o0 -.Lerr1: -#ifndef _LIBC_REENTRANT -#ifndef PIC - sethi %hi(errno), %g1 - or %g1, %lo(errno), %g1 -#else - sethi %gdop_hix22(errno), %g1 - xor %g1, %gdop_lox10(errno), %g1 - ldx [%l7 + %g1], %g1, %gdop(errno) -#endif - st %o0, [%g1] -#else -#if IS_IN (libc) - call HIDDEN_JUMPTARGET(__errno_location) -#else - call __errno_location -#endif - mov %o0,%l1 - st %l1, [%o0] -#endif - sub %g0, 1, %i0 - jmpl %i7+8, %g0 - restore -END (__brk) - -weak_alias (__brk, brk) diff --git a/sysdeps/unix/sysv/linux/sparc/sparc64/dl-brk.S b/sysdeps/unix/sysv/linux/sparc/sparc64/dl-brk.S deleted file mode 100644 index eeb96544e3..0000000000 --- a/sysdeps/unix/sysv/linux/sparc/sparc64/dl-brk.S +++ /dev/null @@ -1 +0,0 @@ -#include <brk.S> diff --git a/sysdeps/unix/sysv/linux/sysdep.h b/sysdeps/unix/sysv/linux/sysdep.h index 71ecc19cd5..736cf52697 100644 --- a/sysdeps/unix/sysv/linux/sysdep.h +++ b/sysdeps/unix/sysv/linux/sysdep.h @@ -99,4 +99,8 @@ it missing due the usage of a old generic version without it). */ #define HAVE_INTERNAL_SEND_SYMBOL 1 +/* Export the ___brk_addr symbol on brk.c implementation (some ABIs export + it due and old crtstuff.c code). */ +#define HAVE_INTERNAL_BRK_ADDR_SYMBOL 0 + #endif /* _SYSDEP_LINUX_H */ diff --git a/sysdeps/unix/sysv/linux/x86_64/brk.c b/sysdeps/unix/sysv/linux/x86_64/brk.c deleted file mode 100644 index fba9278c68..0000000000 --- a/sysdeps/unix/sysv/linux/x86_64/brk.c +++ /dev/null @@ -1,41 +0,0 @@ -/* brk system call for Linux/x86_64. - Copyright (C) 1995-2020 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 - <https://www.gnu.org/licenses/>. */ - -#include <errno.h> -#include <unistd.h> -#include <sysdep.h> - -/* This must be initialized data because commons can't have aliases. */ -void *__curbrk = 0; - -int -__brk (void *addr) -{ - void *newbrk; - - __curbrk = newbrk = (void *) INLINE_SYSCALL (brk, 1, addr); - - if (newbrk < addr) - { - __set_errno (ENOMEM); - return -1; - } - - return 0; -} -weak_alias (__brk, brk) |