[PATCH v7.1 01/13] ARC: ABI Implementation
Adhemerval Zanella
adhemerval.zanella@linaro.org
Wed Jul 1 16:50:25 GMT 2020
On 30/06/2020 21:06, Vineet Gupta via Libc-alpha wrote:
> This code deals with the ARC ABI.
> ---
> Changes since v7:
> - Used void * (iso int *) in tls-macros.h
LGTM, with just a couple of syntax nits below.
Reviewed-by: Adhemerval Zanella <adhemerval.zanella@linaro.org>
> ---
> sysdeps/arc/__longjmp.S | 49 ++++++++++++++++++++++++
> sysdeps/arc/abort-instr.h | 2 +
> sysdeps/arc/bits/endianness.h | 15 ++++++++
> sysdeps/arc/bits/setjmp.h | 26 +++++++++++++
> sysdeps/arc/bsd-_setjmp.S | 1 +
> sysdeps/arc/bsd-setjmp.S | 1 +
> sysdeps/arc/dl-runtime.h | 42 ++++++++++++++++++++
> sysdeps/arc/dl-sysdep.h | 25 ++++++++++++
> sysdeps/arc/dl-trampoline.S | 72 +++++++++++++++++++++++++++++++++++
> sysdeps/arc/gccframe.h | 21 ++++++++++
> sysdeps/arc/jmpbuf-offsets.h | 22 +++++++++++
> sysdeps/arc/jmpbuf-unwind.h | 47 +++++++++++++++++++++++
> sysdeps/arc/machine-gmon.h | 35 +++++++++++++++++
> sysdeps/arc/memusage.h | 23 +++++++++++
> sysdeps/arc/setjmp.S | 66 ++++++++++++++++++++++++++++++++
> sysdeps/arc/sysdep.h | 53 ++++++++++++++++++++++++++
> sysdeps/arc/tls-macros.h | 47 +++++++++++++++++++++++
> 17 files changed, 547 insertions(+)
> create mode 100644 sysdeps/arc/__longjmp.S
> create mode 100644 sysdeps/arc/abort-instr.h
> create mode 100644 sysdeps/arc/bits/endianness.h
> create mode 100644 sysdeps/arc/bits/setjmp.h
> create mode 100644 sysdeps/arc/bsd-_setjmp.S
> create mode 100644 sysdeps/arc/bsd-setjmp.S
> create mode 100644 sysdeps/arc/dl-runtime.h
> create mode 100644 sysdeps/arc/dl-sysdep.h
> create mode 100644 sysdeps/arc/dl-trampoline.S
> create mode 100644 sysdeps/arc/gccframe.h
> create mode 100644 sysdeps/arc/jmpbuf-offsets.h
> create mode 100644 sysdeps/arc/jmpbuf-unwind.h
> create mode 100644 sysdeps/arc/machine-gmon.h
> create mode 100644 sysdeps/arc/memusage.h
> create mode 100644 sysdeps/arc/setjmp.S
> create mode 100644 sysdeps/arc/sysdep.h
> create mode 100644 sysdeps/arc/tls-macros.h
>
> diff --git a/sysdeps/arc/__longjmp.S b/sysdeps/arc/__longjmp.S
> new file mode 100644
> index 000000000000..fcbf1bb6c0e2
> --- /dev/null
> +++ b/sysdeps/arc/__longjmp.S
> @@ -0,0 +1,49 @@
> +/* longjmp for ARC.
> + 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
> + 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 <jmpbuf-offsets.h>
> +
> +/* @ r0 = jump buffer from which regs will be restored
> + @ r1 = value that setjmp( ) will return due to this longjmp. */
> +
> +ENTRY (__longjmp)
> +
> + LDR (blink, r0, 0)
> + LDR (sp, r0, 1)
> + LDR (fp, r0, 2)
> + LDR (gp, r0, 3)
> +
> + LDR (r13, r0, 4)
> + LDR (r14, r0, 5)
> + LDR (r15, r0, 6)
> + LDR (r16, r0, 7)
> + LDR (r17, r0, 8)
> + LDR (r18, r0, 9)
> + LDR (r19, r0, 10)
> + LDR (r20, r0, 11)
> + LDR (r21, r0, 12)
> + LDR (r22, r0, 13)
> + LDR (r23, r0, 14)
> + LDR (r24, r0, 15)
> +
> + mov.f r0, r1
> + j.d [blink]
> + mov.z r0, 1 /* don't return 0 to setjmp callsite from longjmp. */
> +
> +END (__longjmp)
Ok, you have removed r25 save as pre previous discussion.
> diff --git a/sysdeps/arc/abort-instr.h b/sysdeps/arc/abort-instr.h
> new file mode 100644
> index 000000000000..49f33613c404
> --- /dev/null
> +++ b/sysdeps/arc/abort-instr.h
> @@ -0,0 +1,2 @@
> +/* FLAG 1 is privilege mode only instruction, hence will crash any program. */
> +#define ABORT_INSTRUCTION asm ("flag 1")
Ok.
> diff --git a/sysdeps/arc/bits/endianness.h b/sysdeps/arc/bits/endianness.h
> new file mode 100644
> index 000000000000..8f17ca84b485
> --- /dev/null
> +++ b/sysdeps/arc/bits/endianness.h
> @@ -0,0 +1,15 @@
> +#ifndef _BITS_ENDIANNESS_H
> +#define _BITS_ENDIANNESS_H 1
> +
> +#ifndef _BITS_ENDIAN_H
> +# error "Never use <bits/endian.h> directly; include <endian.h> instead."
> +#endif
> +
> +/* ARC has selectable endianness. */
> +#ifdef __BIG_ENDIAN__
> +# define __BYTE_ORDER __BIG_ENDIAN
> +#else
> +# define __BYTE_ORDER __LITTLE_ENDIAN
> +#endif
> +
> +#endif /* bits/endianness.h */
Ok.
> diff --git a/sysdeps/arc/bits/setjmp.h b/sysdeps/arc/bits/setjmp.h
> new file mode 100644
> index 000000000000..6bba95fafe0f
> --- /dev/null
> +++ b/sysdeps/arc/bits/setjmp.h
> @@ -0,0 +1,26 @@
> +/* Define the machine-dependent type `jmp_buf'. ARC version.
I think current trend is to just use apostrophe instead of the grave
accent in such cases.
> + 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
> + 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/>. */
> +
> +#ifndef _ARC_BITS_SETJMP_H
> +#define _ARC_BITS_SETJMP_H 1
> +
> +/* Saves r13-r25 (callee-saved), fp (frame pointer), sp (stack pointer),
> + blink (branch-n-link). */
> +typedef long int __jmp_buf[32];
> +
> +#endif
Ok.
> diff --git a/sysdeps/arc/bsd-_setjmp.S b/sysdeps/arc/bsd-_setjmp.S
> new file mode 100644
> index 000000000000..90b99cd8c3e0
> --- /dev/null
> +++ b/sysdeps/arc/bsd-_setjmp.S
> @@ -0,0 +1 @@
> +/* _setjmp is in setjmp.S. */
Ok.
> diff --git a/sysdeps/arc/bsd-setjmp.S b/sysdeps/arc/bsd-setjmp.S
> new file mode 100644
> index 000000000000..d3b823c118bc
> --- /dev/null
> +++ b/sysdeps/arc/bsd-setjmp.S
> @@ -0,0 +1 @@
> +/* setjmp is in setjmp.S. */
Ok.
> diff --git a/sysdeps/arc/dl-runtime.h b/sysdeps/arc/dl-runtime.h
> new file mode 100644
> index 000000000000..833e72c7385b
> --- /dev/null
> +++ b/sysdeps/arc/dl-runtime.h
> @@ -0,0 +1,42 @@
> +/* Helpers for On-demand PLT fixup for shared objects. ARC version.
> + 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
> + 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/>. */
> +
> +/* PLT jump into resolver passes PC of PLTn, while _dl_fixup expects the
> + address of corresponding .rela.plt entry.
> +
> + - @plt0: runtime pc of first plt entry (DT_PLTGOT)
> + - @pltn: runtime pc of plt entry being resolved
> + - @size: size of .plt.rela entry (unused). */
> +static inline uintptr_t
> +reloc_index (uintptr_t plt0, uintptr_t pltn, size_t size)
> +{
> + unsigned long int idx = pltn - plt0;
> +
> + /* PLT trampoline is 16 bytes. */
Double space after period.
> + idx /= 16;
> +
> + /* Exclude PLT0 and PLT1. */
> + return idx - 2;
> +}
> +
> +static inline uintptr_t
> +reloc_offset (uintptr_t plt0, uintptr_t pltn)
> +{
> + size_t sz = sizeof (ElfW(Rela));
> + return reloc_index (plt0, pltn, sz) * sz;
> +}
Ok.
> diff --git a/sysdeps/arc/dl-sysdep.h b/sysdeps/arc/dl-sysdep.h
> new file mode 100644
> index 000000000000..aefec2ba056a
> --- /dev/null
> +++ b/sysdeps/arc/dl-sysdep.h
> @@ -0,0 +1,25 @@
> +/* System-specific settings for dynamic linker code. ARC version.
> + 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
> + 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_next <dl-sysdep.h>
> +
> +/* _dl_argv cannot be attribute_relro, because _dl_start_user
> + might write into it after _dl_start returns. */
> +#define DL_ARGV_NOT_RELRO 1
> +
> +#define DL_EXTERN_PROTECTED_DATA
Ok.
> diff --git a/sysdeps/arc/dl-trampoline.S b/sysdeps/arc/dl-trampoline.S
> new file mode 100644
> index 000000000000..eb2a030046d6
> --- /dev/null
> +++ b/sysdeps/arc/dl-trampoline.S
> @@ -0,0 +1,72 @@
> +/* PLT trampolines. ARC version.
> + 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
> + 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 <libc-symbols.h>
> +
> +#include <sysdep.h>
> +#include <sys/syscall.h>
> +
> +/* resolver has atypical calling ABI (r11 and r12)
> + PLTn which lands us here, sets up
> + r11 = Module info (tpnt pointer as expected by resolver)
> + r12 = PC of the PLTn itself - needed by resolver to find
> + corresponding .rela.plt entry. */
> +
> +ENTRY (_dl_runtime_resolve)
> +
> + /* save args to func being resolved before entering resolver. */
> + push_s r0
> + push_s r1
> + push_s r2
> + push_s r3
> + st.a r4, [sp, -4]
> + st.a r5, [sp, -4]
> + st.a r6, [sp, -4]
> + st.a r7, [sp, -4]
> + st.a r8, [sp, -4]
> + st.a r9, [sp, -4]
> + cfi_adjust_cfa_offset (40)
> + push_s blink
> + cfi_adjust_cfa_offset (4)
> + cfi_rel_offset (blink, 0)
> +
> + mov_s r1, r12
> + bl.d _dl_fixup
> + mov r0, r11
> +
> + /* restore regs back. */
> + ld.ab blink,[sp, 4]
> + cfi_adjust_cfa_offset (-4)
> + cfi_restore (blink)
> + ld.ab r9, [sp, 4]
> + ld.ab r8, [sp, 4]
> + ld.ab r7, [sp, 4]
> + ld.ab r6, [sp, 4]
> + ld.ab r5, [sp, 4]
> + ld.ab r4, [sp, 4]
> + pop_s r3
> + pop_s r2
> + pop_s r1
> + cfi_adjust_cfa_offset (-36)
> +
> + j_s.d [r0] /* r0 has resolved function addr. */
> + pop_s r0 /* restore first arg to resolved call. */
> + cfi_adjust_cfa_offset (-4)
> + cfi_restore (r0)
> +END (_dl_runtime_resolve)
Ok.
> diff --git a/sysdeps/arc/gccframe.h b/sysdeps/arc/gccframe.h
> new file mode 100644
> index 000000000000..296857ba9ccc
> --- /dev/null
> +++ b/sysdeps/arc/gccframe.h
> @@ -0,0 +1,21 @@
> +/* Definition of object in frame unwind info. ARC version.
> + 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
> + 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/>. */
> +
> +#define FIRST_PSEUDO_REGISTER 40
> +
> +#include <sysdeps/generic/gccframe.h>
Ok.
> diff --git a/sysdeps/arc/jmpbuf-offsets.h b/sysdeps/arc/jmpbuf-offsets.h
> new file mode 100644
> index 000000000000..e7551cad3b47
> --- /dev/null
> +++ b/sysdeps/arc/jmpbuf-offsets.h
> @@ -0,0 +1,22 @@
> +/* Private macros for accessing __jmp_buf contents. ARC version.
> + 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
> + 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/>. */
> +
> +#define JB_SP 1
> +
> +/* Helper for generic ____longjmp_chk. */
Ok.
> +#define JB_FRAME_ADDRESS(buf) ((void *) (unsigned long int) (buf[JB_SP]))
> diff --git a/sysdeps/arc/jmpbuf-unwind.h b/sysdeps/arc/jmpbuf-unwind.h
> new file mode 100644
> index 000000000000..697d3e2ee5e5
> --- /dev/null
> +++ b/sysdeps/arc/jmpbuf-unwind.h
> @@ -0,0 +1,47 @@
> +/* Examine __jmp_buf for unwinding frames. ARC version.
> + 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
> + 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 <setjmp.h>
> +#include <jmpbuf-offsets.h>
> +#include <stdint.h>
> +#include <unwind.h>
> +
> +/* Test if longjmp to JMPBUF would unwind the frame
> + containing a local variable at ADDRESS. */
> +
> +#define _JMPBUF_UNWINDS(jmpbuf, address, demangle) \
> + ((void *) (address) < (void *) demangle (jmpbuf[JB_SP]))
> +
> +#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
> + _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
> +
> +static inline uintptr_t __attribute__ ((unused))
> +_jmpbuf_sp (__jmp_buf jmpbuf)
> +{
> + uintptr_t sp = jmpbuf[JB_SP];
> +#ifdef PTR_DEMANGLE
> + PTR_DEMANGLE (sp);
> +#endif
> + return sp;
> +}
> +
> +#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
> + ((uintptr_t) (_address) - (_adj) < (uintptr_t) (_jmpbuf_sp (_jmpbuf) - (_adj)))
> +
> +/* We use the normal longjmp for unwinding. */
> +#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
Ok. As a side note teh jmpbuf-unwind.h is candidate for some consolidation
(the same macros are replicated in each architecture).
> diff --git a/sysdeps/arc/machine-gmon.h b/sysdeps/arc/machine-gmon.h
> new file mode 100644
> index 000000000000..a0d4e95a945d
> --- /dev/null
> +++ b/sysdeps/arc/machine-gmon.h
> @@ -0,0 +1,35 @@
> +/* Machine-dependent definitions for profiling support. ARC version.
> + 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
> + 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 _MCOUNT_DECL(frompc, selfpc) \
> +static void \
> +__mcount_internal (unsigned long int frompc, unsigned long int selfpc)
> +
> +/* This is very simple as gcc does all the heavy lifting at _mcount call site
> + - sets up caller's blink in r0, so frompc is setup correctly
> + - preserve argument registers for original call. */
> +
> +#define MCOUNT \
> +void \
> +_mcount (void *frompc) \
> +{ \
> + __mcount_internal ((unsigned long int) frompc, \
> + (unsigned long int) __builtin_return_address (0)); \
> +}
Ok.
> diff --git a/sysdeps/arc/memusage.h b/sysdeps/arc/memusage.h
> new file mode 100644
> index 000000000000..724bc4de1312
> --- /dev/null
> +++ b/sysdeps/arc/memusage.h
> @@ -0,0 +1,23 @@
> +/* Machine-specific definitions for memory usage profiling, ARC version.
> + 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
> + 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/>. */
> +
> +#define GETSP() ({ register uintptr_t stack_ptr asm ("sp"); stack_ptr; })
> +
> +#define uatomic32_t unsigned int
> +
> +#include <sysdeps/generic/memusage.h>
Ok.
> diff --git a/sysdeps/arc/setjmp.S b/sysdeps/arc/setjmp.S
> new file mode 100644
> index 000000000000..01cc3af98237
> --- /dev/null
> +++ b/sysdeps/arc/setjmp.S
> @@ -0,0 +1,66 @@
> +/* setjmp for ARC.
> + 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
> + 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>
> +
> +/* Upon entry r0 = jump buffer into which regs will be saved. */
> +ENTRY (setjmp)
> + b.d __sigsetjmp
> + mov r1, 1 /* save signals. */
> +END (setjmp)
> +
> +/* Upon entry r0 = jump buffer into which regs will be saved. */
> +ENTRY (_setjmp)
> + b.d __sigsetjmp
> + mov r1, 0 /* don't save signals. */
> +END (_setjmp)
> +libc_hidden_def (_setjmp)
> +
> +/* Upon entry
> + r0 = jump buffer into which regs will be saved
> + r1 = do we need to save signals. */
> +ENTRY (__sigsetjmp)
> +
> + /* Make a note of where longjmp will return to.
> + that will be right next to this setjmp call-site in BLINK
> + since "C" caller of this routine will do a branch-n-link. */
> +
> + STR (blink, r0, 0)
> + STR (sp, r0, 1)
> + STR (fp, r0, 2)
> + STR (gp, r0, 3)
> +
> + STR (r13, r0, 4)
> + STR (r14, r0, 5)
> + STR (r15, r0, 6)
> + STR (r16, r0, 7)
> + STR (r17, r0, 8)
> + STR (r18, r0, 9)
> + STR (r19, r0, 10)
> + STR (r20, r0, 11)
> + STR (r21, r0, 12)
> + STR (r22, r0, 13)
> + STR (r23, r0, 14)
> + STR (r24, r0, 15)
> +
> + b __sigjmp_save
> +
> +END (__sigsetjmp)
> +
> +libc_hidden_def (__sigsetjmp)
Ok.
> diff --git a/sysdeps/arc/sysdep.h b/sysdeps/arc/sysdep.h
> new file mode 100644
> index 000000000000..9ac295bdf35b
> --- /dev/null
> +++ b/sysdeps/arc/sysdep.h
> @@ -0,0 +1,53 @@
> +/* Assembler macros for ARC.
> + 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
> + 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 <sysdeps/generic/sysdep.h>
> +
> +#ifdef __ASSEMBLER__
> +
> +/* Syntactic details of assembler.
> + ; is not newline but comment, # is also for comment. */
> +# define ASM_SIZE_DIRECTIVE(name) .size name,.-name
> +
> +# define ENTRY(name) \
> + .align 4 ASM_LINE_SEP \
> + .globl C_SYMBOL_NAME(name) ASM_LINE_SEP \
> + .type C_SYMBOL_NAME(name),%function ASM_LINE_SEP \
> + C_LABEL(name) ASM_LINE_SEP \
> + cfi_startproc ASM_LINE_SEP \
> + CALL_MCOUNT
> +
> +# undef END
> +# define END(name) \
> + cfi_endproc ASM_LINE_SEP \
> + ASM_SIZE_DIRECTIVE(name)
> +
> +# ifdef SHARED
> +# define PLTJMP(_x) _x##@plt
> +# else
> +# define PLTJMP(_x) _x
> +# endif
> +
> +# define L(label) .L##label
> +
> +# define CALL_MCOUNT /* Do nothing for now. */
> +
> +# define STR(reg, rbase, off) st reg, [rbase, off * 4]
> +# define LDR(reg, rbase, off) ld reg, [rbase, off * 4]
> +
> +#endif /* __ASSEMBLER__ */
OK.
> diff --git a/sysdeps/arc/tls-macros.h b/sysdeps/arc/tls-macros.h
> new file mode 100644
> index 000000000000..7a076182b977
> --- /dev/null
> +++ b/sysdeps/arc/tls-macros.h
> @@ -0,0 +1,47 @@
> +/* Macros to support TLS testing in times of missing compiler support. ARC version.
> + 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
> + 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/>. */
> +
> +
> +/* For now. */
> +#define TLS_LD(x) TLS_IE(x)
> +
> +#define TLS_GD(x) \
> + ({ void *__result; \
> + __asm__ ("add r0, pcl, @" #x "@tlsgd \n" \
> + ".tls_gd_ld " #x "`bl __tls_get_addr@plt \n" \
> + "mov %0, r0 \n" \
> + : "=&r" (__result) \
> + ::"r0","r1","r2","r3","r4","r5","r6","r7", \
> + "r8","r9","r10","r11","r12"); \
> + __result; })
> +
> +#define TLS_LE(x) \
> + ({ void *__result; \
> + void *tp = __builtin_thread_pointer (); \
> + __asm__ ("add %0, %1, @" #x "@tpoff \n" \
> + : "=r" (__result) : "r"(tp)); \
> + __result; })
> +
> +#define TLS_IE(x) \
> + ({ void *__result; \
> + void *tp = __builtin_thread_pointer (); \
> + __asm__ ("ld %0, [pcl, @" #x "@tlsie] \n" \
> + "add %0, %1, %0 \n" \
> + : "=&r" (__result) : "r" (tp)); \
> + __result; })
>
Ok.
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