[OpenRISC] [PATCH v4 03/13] or1k: ABI Implementation

Stafford Horne
2021-12-29T04:46:06Z

On Wed, Dec 29, 2021 at 01:42:41PM +0900, Stafford Horne wrote:
> This code deals with the OpenRISC ABI.
> ---
> sysdeps/or1k/__longjmp.S | 50 ++++++++++++++++++++
> sysdeps/or1k/bits/endianness.h | 11 +++++
> sysdeps/or1k/bits/setjmp.h | 32 +++++++++++++
> sysdeps/or1k/bsd-_setjmp.S | 1 +
> sysdeps/or1k/bsd-setjmp.S | 1 +
> sysdeps/or1k/dl-trampoline.S | 73 ++++++++++++++++++++++++++++++
> sysdeps/or1k/jmpbuf-offsets.h | 23 ++++++++++
> sysdeps/or1k/jmpbuf-unwind.h | 36 +++++++++++++++
> sysdeps/or1k/machine-gmon.h | 35 ++++++++++++++
> sysdeps/or1k/memusage.h | 21 +++++++++
> sysdeps/or1k/setjmp.S | 56 +++++++++++++++++++++++
> sysdeps/or1k/sysdep.h | 83 ++++++++++++++++++++++++++++++++++
> 12 files changed, 422 insertions(+)
> create mode 100644 sysdeps/or1k/__longjmp.S
> create mode 100644 sysdeps/or1k/bits/endianness.h
> create mode 100644 sysdeps/or1k/bits/setjmp.h
> create mode 100644 sysdeps/or1k/bsd-_setjmp.S
> create mode 100644 sysdeps/or1k/bsd-setjmp.S
> create mode 100644 sysdeps/or1k/dl-trampoline.S
> create mode 100644 sysdeps/or1k/jmpbuf-offsets.h
> create mode 100644 sysdeps/or1k/jmpbuf-unwind.h
> create mode 100644 sysdeps/or1k/machine-gmon.h
> create mode 100644 sysdeps/or1k/memusage.h
> create mode 100644 sysdeps/or1k/setjmp.S
> create mode 100644 sysdeps/or1k/sysdep.h
>
> diff --git a/sysdeps/or1k/__longjmp.S b/sysdeps/or1k/__longjmp.S
> new file mode 100644
> index 0000000000..32e26ccd64
> --- /dev/null
> +++ b/sysdeps/or1k/__longjmp.S
> @@ -0,0 +1,50 @@
> +/* longjmp, OpenRISC version.
> + Copyright (C) 2021 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, write to the Free
> + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
> + 02111-1307 USA. */
> +
> +#include <sysdep.h>
> +#define _ASM
> +#define _SETJMP_H
> +#include <bits/setjmp.h>
> +
> +ENTRY (__longjmp)
> + l.lwz r1, 0(r3)
> + l.lwz r2, 4(r3)
> +
> + /* if r4 is 0, something wrong, so set it to 1 */
> + l.sfeqi r4, 0x0
> + l.bnf 1f /* r4 != 0, longjmp value sensible */
> + l.nop
> + l.ori r4, r0, 0x1 /* make nonzero */
> +1:
> + l.addi r11, r4, 0
> + l.lwz r9, 8(r3)
> + l.lwz r10, 12(r3)
> + l.lwz r14, 16(r3)
> + l.lwz r16, 20(r3)
> + l.lwz r18, 24(r3)
> + l.lwz r20, 28(r3)
> + l.lwz r22, 32(r3)
> + l.lwz r24, 36(r3)
> + l.lwz r26, 40(r3)
> + l.lwz r28, 44(r3)
> + l.lwz r30, 48(r3)
> + l.jr r9
> + l.nop
> +END (__longjmp)
> +libc_hidden_def (__longjmp)
> diff --git a/sysdeps/or1k/bits/endianness.h b/sysdeps/or1k/bits/endianness.h
> new file mode 100644
> index 0000000000..7b61d8adb7
> --- /dev/null
> +++ b/sysdeps/or1k/bits/endianness.h
> @@ -0,0 +1,11 @@
> +#ifndef _BITS_ENDIANNESS_H
> +#define _BITS_ENDIANNESS_H 1
> +
> +#ifndef _BITS_ENDIAN_H
> +# error "Never use <bits/endianness.h> directly; include <endian.h> instead."
> +#endif
> +
> +/* OpenRISC is big-endian. */
> +#define __BYTE_ORDER __BIG_ENDIAN
> +
> +#endif /* bits/endianness.h */
> diff --git a/sysdeps/or1k/bits/setjmp.h b/sysdeps/or1k/bits/setjmp.h
> new file mode 100644
> index 0000000000..dac511c904
> --- /dev/null
> +++ b/sysdeps/or1k/bits/setjmp.h
> @@ -0,0 +1,32 @@
> +/* Define the machine-dependent type `jmp_buf'. OpenRISC version.
> + Copyright (C) 2021 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, write to the Free
> + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
> + 02111-1307 USA. */
> +
> +
> +#ifndef _OR1K_BITS_SETJMP_H
> +#define _OR1K_BITS_SETJMP_H 1
> +
> +#if !defined _SETJMP_H && !defined _PTHREAD_H
> +# error "Never include <bits/setjmp.h> directly; use <setjmp.h> instead."
> +#endif
> +
> +#ifndef _ASM
> +typedef long int __jmp_buf[13];
> +#endif
> +
> +#endif /* _OR1K_BITS_SETJMP_H */
> diff --git a/sysdeps/or1k/bsd-_setjmp.S b/sysdeps/or1k/bsd-_setjmp.S
> new file mode 100644
> index 0000000000..4e6a2da560
> --- /dev/null
> +++ b/sysdeps/or1k/bsd-_setjmp.S
> @@ -0,0 +1 @@
> +/* _setjmp is in setjmp.S */
> diff --git a/sysdeps/or1k/bsd-setjmp.S b/sysdeps/or1k/bsd-setjmp.S
> new file mode 100644
> index 0000000000..1da848d2f1
> --- /dev/null
> +++ b/sysdeps/or1k/bsd-setjmp.S
> @@ -0,0 +1 @@
> +/* setjmp is in setjmp.S */
> diff --git a/sysdeps/or1k/dl-trampoline.S b/sysdeps/or1k/dl-trampoline.S
> new file mode 100644
> index 0000000000..f7b1da90df
> --- /dev/null
> +++ b/sysdeps/or1k/dl-trampoline.S
> @@ -0,0 +1,73 @@
> +/* Machine-dependent ELF runtime symbol resolution, OpenRISC version.
> + Copyright (C) 2021 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, write to the Free
> + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
> + 02111-1307 USA. */
> +
> +#include <sysdep.h>
> +
> +/* This code is plugged into the PLT and used by the dynamic linker to
> + call _dl_fixup (dl-runtime.c).
> +
> + We assume that R11 contains the relocation offset and R12 contains
> + link_map (_DYNAMIC). This must be consistent with the JUMP_SLOT
> + layout generated by binutils. */
> +
> +ENTRY (_dl_runtime_resolve)
> + l.sw -4(r1), r9
> + l.sw -8(r1), r1
> +
> + /* save function arguments. */
> + l.sw -12(r1), r3
> + l.sw -16(r1), r4
> + l.sw -20(r1), r5
> + l.sw -24(r1), r6
> + l.sw -28(r1), r7
> + l.sw -32(r1), r8
> +
> + .cfi_offset 9, -4
> + .cfi_offset 1, -8
> + .cfi_offset 3, -12
> + .cfi_offset 4, -16
> + .cfi_offset 5, -20
> + .cfi_offset 6, -24
> + .cfi_offset 7, -28
> + .cfi_offset 8, -32
> +
> + l.addi r1,r1, -32
> + .cfi_def_cfa_offset 32
> +
> + l.ori r3, r12, 0
> + l.ori r4, r11, 0
> +
> + l.jal _dl_fixup
> + l.nop
> +
> + /* Restore function arguments. */
> + l.addi r1,r1, 32
> + l.lwz r8, -32(r1)
> + l.lwz r7, -28(r1)
> + l.lwz r6, -24(r1)
> + l.lwz r5, -20(r1)
> + l.lwz r4, -16(r1)
> + l.lwz r3, -12(r1)
> +
> + /* restore return address. */
> + l.lwz r9, -4(r1)
> +
> + l.jr r11
> + l.nop
> +END (_dl_runtime_resolve)
> diff --git a/sysdeps/or1k/jmpbuf-offsets.h b/sysdeps/or1k/jmpbuf-offsets.h
> new file mode 100644
> index 0000000000..e33105cc03
> --- /dev/null
> +++ b/sysdeps/or1k/jmpbuf-offsets.h
> @@ -0,0 +1,23 @@
> +/* Private macros for accessing __jmp_buf contents. OpenRISC version.
> + Copyright (C) 2021 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 __JMP_BUF_SP 0
> +
> +/* Helper for generic function ____longjmp_chk. */
> +#define JB_FRAME_ADDRESS(buf) \
> + ((void *) (unsigned long) (buf[__JMP_BUF_SP]))
> diff --git a/sysdeps/or1k/jmpbuf-unwind.h b/sysdeps/or1k/jmpbuf-unwind.h
> new file mode 100644
> index 0000000000..6710dea989
> --- /dev/null
> +++ b/sysdeps/or1k/jmpbuf-unwind.h
> @@ -0,0 +1,36 @@
> +/* Macros to help frame unwinding using jmpbuf. OpenRISC version.
> + Copyright (C) 2021 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[__JMP_BUF_SP]))
> +
> +#define _JMPBUF_CFA_UNWINDS_ADJ(_jmpbuf, _context, _adj) \
> + _JMPBUF_UNWINDS_ADJ (_jmpbuf, (void *) _Unwind_GetCFA (_context), _adj)
> +
> +#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
> + ((uintptr_t) (_address) - (_adj) < (uintptr_t) (_jmpbuf)[__JMP_BUF_SP] - (_adj))
> +
> +/* We use the normal longjmp for unwinding. */
> +#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
> diff --git a/sysdeps/or1k/machine-gmon.h b/sysdeps/or1k/machine-gmon.h
> new file mode 100644
> index 0000000000..7152105eec
> --- /dev/null
> +++ b/sysdeps/or1k/machine-gmon.h
> @@ -0,0 +1,35 @@
> +/* Machine-dependent definitions for profiling support. OpenRISC version.
> + Copyright (C) 2021 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 the _mcount
> + call site. GCC passes in the return address of the function calling
> + _mcount. */
> +
> +#define MCOUNT \
> +void \
> +_mcount (void *frompc) \
> +{ \
> + __mcount_internal ((unsigned long int) frompc, \
> + (unsigned long int) __builtin_return_address (0)); \
> +}
> diff --git a/sysdeps/or1k/memusage.h b/sysdeps/or1k/memusage.h
> new file mode 100644
> index 0000000000..a62da17e61
> --- /dev/null
> +++ b/sysdeps/or1k/memusage.h
> @@ -0,0 +1,21 @@
> +/* Definitions for memory usage profiling. OpenRISC version.
> + Copyright (C) 2021 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 ("r1"); stack_ptr; })
> +
> +#include <sysdeps/generic/memusage.h>
> diff --git a/sysdeps/or1k/setjmp.S b/sysdeps/or1k/setjmp.S
> new file mode 100644
> index 0000000000..660995b493
> --- /dev/null
> +++ b/sysdeps/or1k/setjmp.S
> @@ -0,0 +1,56 @@
> +/* setjmp, OpenRISC version.
> + Copyright (C) 2021 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, write to the Free
> + Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
> + 02111-1307 USA. */
> +
> +#include <sysdep.h>
> +#define _ASM
> +#define _SETJMP_H
> +#include <bits/setjmp.h>
> +
> +ENTRY (_setjmp)
> + l.addi r4, r0, 0 /* Set second argument to 0. */
> + l.j .Local__sigsetjmp
> + l.nop
> +END (_setjmp)
> +libc_hidden_def (_setjmp)
> +
> +ENTRY (setjmp)
> + l.addi r4, r0, 1 /* Set second argument to 1. */
> + l.j .Local__sigsetjmp
> + l.nop
> +END (setjmp)
> +
> +ENTRY (__sigsetjmp)
> +.Local__sigsetjmp:
> + l.sw 0(r3), r1
> + l.sw 4(r3), r2
> + l.sw 8(r3), r9
> + l.sw 12(r3), r10
> + l.sw 16(r3), r14
> + l.sw 20(r3), r16
> + l.sw 24(r3), r18
> + l.sw 28(r3), r20
> + l.sw 32(r3), r22
> + l.sw 36(r3), r24
> + l.sw 40(r3), r26
> + l.sw 44(r3), r28
> + l.sw 48(r3), r30
> + l.j __sigjmp_save
> + l.nop
> +END (__sigsetjmp)
> +hidden_def (__sigsetjmp)
> diff --git a/sysdeps/or1k/sysdep.h b/sysdeps/or1k/sysdep.h
> new file mode 100644
> index 0000000000..61a135afe7
> --- /dev/null
> +++ b/sysdeps/or1k/sysdep.h
> @@ -0,0 +1,83 @@
> +/* Assembler macro definitions. OpenRISC version.
> + Copyright (C) 2021 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>
> +#include <features.h>
> +
> +#if defined __ASSEMBLER__ || defined REQUEST_ASSEMBLER_MACROS
> +
> +/* Make use of .size directive. */
> +#define ASM_SIZE_DIRECTIVE(name) .size name,.-name;
> +
> +/* Define an entry point visible from C. */
> +#define ENTRY(name) \
> + .globl C_SYMBOL_NAME(name); \
> + .type C_SYMBOL_NAME(name), at function; \
> + .align 4; \
> + C_LABEL(name) \
> + cfi_startproc; \
> + CALL_MCOUNT
> +
> +#undef END
> +#define END(name) \
> + cfi_endproc; \
> + ASM_SIZE_DIRECTIVE(name)
> +
> +/* Since C identifiers are not normally prefixed with an underscore
> + on this system, the asm identifier `syscall_error' intrudes on the
> + C name space. Make sure we use an innocuous name. */
> +#define syscall_error __syscall_error
> +
> +/* If compiled for profiling, call `mcount' at the start of each function. */
> +#ifdef PROF
> +# ifdef __PIC__
> +# define CALL_MCOUNT \
> + l.addi r1, r1, -8; \
> + l.sw 0(r1), r9; \
> + l.sw 4(r1), r3; \
> + l.ori r3, r9, 0; \
> + l.j plt(_mcount); \
> + l.nop; \
> + l.lwz r9, 0(r1); \
> + l.lwz r3, 4(r1); \
> + l.addi r1, r1, 8;
> +# else
> +# define CALL_MCOUNT \
> + l.addi r1, r1, -8; \
> + l.sw 0(r1), r9; \
> + l.sw 4(r1), r3; \
> + l.ori r3, r9, 0; \
> + l.movhi r15, hi(_mcount); \
> + l.ori r15, r15, lo(_mcount); \
> + l.jr r15; \
> + l.nop; \
> + l.lwz r9, 0(r1); \
> + l.lwz r3, 4(r1); \
> + l.addi r1, r1, 8;
> +# endif
> +#else
> +# define CALL_MCOUNT /* Do nothing. */
> +#endif
> +
> +/* Local label name for asm code. */
> +#define L(name) .L##name
> +
> +/* Specify the size in bytes of a machine register. */
> +#define REGSIZE 4
> +

This REGSIZE is not needed it can be removed.

> +#endif /* __ASSEMBLER__ */
> --
> 2.31.1
>