From: Fangrui Song <maskray@google.com>
To: caiyinyu <caiyinyu@loongson.cn>
Cc: libc-alpha@sourceware.org, xuchenghua@loongson.cn,
joseph_myers@mentor.com
Subject: Re: [PATCH v4 04/13] LoongArch: ABI Implementation
Date: Mon, 9 May 2022 01:20:07 -0700 [thread overview]
Message-ID: <20220509082007.nvn37ol7k66l5htv@google.com> (raw)
In-Reply-To: <20220509023010.1250020-5-caiyinyu@loongson.cn>
On 2022-05-09, caiyinyu wrote:
>---
> sysdeps/loongarch/__longjmp.S | 52 +++
> sysdeps/loongarch/bits/endianness.h | 11 +
> sysdeps/loongarch/bits/link.h | 58 +++
> sysdeps/loongarch/bits/setjmp.h | 42 +++
> sysdeps/loongarch/bsd-_setjmp.c | 1 +
> sysdeps/loongarch/bsd-setjmp.c | 1 +
> sysdeps/loongarch/dl-machine.h | 362 +++++++++++++++++++
> sysdeps/loongarch/dl-trampoline.S | 91 +++++
> sysdeps/loongarch/jmpbuf-offsets.h | 22 ++
> sysdeps/loongarch/jmpbuf-unwind.h | 45 +++
> sysdeps/loongarch/ldsodefs.h | 41 +++
> sysdeps/loongarch/linkmap.h | 22 ++
> sysdeps/loongarch/machine-gmon.h | 37 ++
> sysdeps/loongarch/setjmp.S | 66 ++++
> sysdeps/loongarch/sotruss-lib.c | 50 +++
> sysdeps/loongarch/start.S | 67 ++++
> sysdeps/loongarch/sys/asm.h | 59 +++
> sysdeps/loongarch/tst-audit.h | 23 ++
> sysdeps/unix/sysv/linux/loongarch/ldconfig.h | 26 ++
> 19 files changed, 1076 insertions(+)
> create mode 100644 sysdeps/loongarch/__longjmp.S
> create mode 100644 sysdeps/loongarch/bits/endianness.h
> create mode 100644 sysdeps/loongarch/bits/link.h
> create mode 100644 sysdeps/loongarch/bits/setjmp.h
> create mode 100644 sysdeps/loongarch/bsd-_setjmp.c
> create mode 100644 sysdeps/loongarch/bsd-setjmp.c
> create mode 100644 sysdeps/loongarch/dl-machine.h
> create mode 100644 sysdeps/loongarch/dl-trampoline.S
> create mode 100644 sysdeps/loongarch/jmpbuf-offsets.h
> create mode 100644 sysdeps/loongarch/jmpbuf-unwind.h
> create mode 100644 sysdeps/loongarch/ldsodefs.h
> create mode 100644 sysdeps/loongarch/linkmap.h
> create mode 100644 sysdeps/loongarch/machine-gmon.h
> create mode 100644 sysdeps/loongarch/setjmp.S
> create mode 100644 sysdeps/loongarch/sotruss-lib.c
> create mode 100644 sysdeps/loongarch/start.S
> create mode 100644 sysdeps/loongarch/sys/asm.h
> create mode 100644 sysdeps/loongarch/tst-audit.h
> create mode 100644 sysdeps/unix/sysv/linux/loongarch/ldconfig.h
>
>diff --git a/sysdeps/loongarch/__longjmp.S b/sysdeps/loongarch/__longjmp.S
>new file mode 100644
>index 0000000000..b7690dd94f
>--- /dev/null
>+++ b/sysdeps/loongarch/__longjmp.S
>@@ -0,0 +1,52 @@
>+/* longjmp.
>+ Copyright (C) 2022 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 <sys/asm.h>
>+
>+ENTRY (__longjmp)
>+ REG_L ra, a0, 0*SZREG
>+ REG_L sp, a0, 1*SZREG
>+ REG_L x, a0, 2*SZREG
>+ REG_L fp, a0, 3*SZREG
>+ REG_L s0, a0, 4*SZREG
>+ REG_L s1, a0, 5*SZREG
>+ REG_L s2, a0, 6*SZREG
>+ REG_L s3, a0, 7*SZREG
>+ REG_L s4, a0, 8*SZREG
>+ REG_L s5, a0, 9*SZREG
>+ REG_L s6, a0, 10*SZREG
>+ REG_L s7, a0, 11*SZREG
>+ REG_L s8, a0, 12*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_L $f24, a0, 13*SZREG + 0*SZFREG
>+ FREG_L $f25, a0, 13*SZREG + 1*SZFREG
>+ FREG_L $f26, a0, 13*SZREG + 2*SZFREG
>+ FREG_L $f27, a0, 13*SZREG + 3*SZFREG
>+ FREG_L $f28, a0, 13*SZREG + 4*SZFREG
>+ FREG_L $f29, a0, 13*SZREG + 5*SZFREG
>+ FREG_L $f30, a0, 13*SZREG + 6*SZFREG
>+ FREG_L $f31, a0, 13*SZREG + 7*SZFREG
>+#endif
>+
>+ sltui a0,a1,1
>+ ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1
>+ jirl zero,ra,0
>+
>+END (__longjmp)
>diff --git a/sysdeps/loongarch/bits/endianness.h b/sysdeps/loongarch/bits/endianness.h
>new file mode 100644
>index 0000000000..7290be7b18
>--- /dev/null
>+++ b/sysdeps/loongarch/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
>+
>+/* LoongArch is little-endian. */
>+#define __BYTE_ORDER __LITTLE_ENDIAN
>+
>+#endif /* bits/endianness.h */
>diff --git a/sysdeps/loongarch/bits/link.h b/sysdeps/loongarch/bits/link.h
>new file mode 100644
>index 0000000000..4df09989cb
>--- /dev/null
>+++ b/sysdeps/loongarch/bits/link.h
>@@ -0,0 +1,58 @@
>+/* Machine-specific declarations for dynamic linker interface.
>+ Copyright (C) 2022 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 _LINK_H
>+#error "Never include <bits/link.h> directly; use <link.h> instead."
>+#endif
>+
>+typedef struct La_loongarch_regs
>+{
>+ unsigned long int lr_reg[8]; /* a0 - a7 */
>+ double lr_fpreg[8]; /* fa0 - fa7 */
>+ unsigned long int lr_ra;
>+ unsigned long int lr_sp;
>+} La_loongarch_regs;
>+
>+/* Return values for calls from PLT on LoongArch. */
>+typedef struct La_loongarch_retval
>+{
>+ unsigned long int lrv_a0;
>+ unsigned long int lrv_a1;
>+ double lrv_fa0;
>+ double lrv_fa1;
>+} La_loongarch_retval;
>+
>+__BEGIN_DECLS
>+
>+extern ElfW (Addr) la_loongarch_gnu_pltenter (ElfW (Sym) * __sym,
>+ unsigned int __ndx,
>+ uintptr_t *__refcook,
>+ uintptr_t *__defcook,
>+ La_loongarch_regs *__regs,
>+ unsigned int *__flags,
>+ const char *__symname,
>+ long int *__framesizep);
>+extern unsigned int la_loongarch_gnu_pltexit (ElfW (Sym) * __sym,
>+ unsigned int __ndx,
>+ uintptr_t *__refcook,
>+ uintptr_t *__defcook,
>+ const La_loongarch_regs *__inregs,
>+ La_loongarch_retval *__outregs,
>+ const char *__symname);
>+
>+__END_DECLS
>diff --git a/sysdeps/loongarch/bits/setjmp.h b/sysdeps/loongarch/bits/setjmp.h
>new file mode 100644
>index 0000000000..8b323ad2b6
>--- /dev/null
>+++ b/sysdeps/loongarch/bits/setjmp.h
>@@ -0,0 +1,42 @@
>+/* Define the machine-dependent type `jmp_buf'.
>+ Copyright (C) 2022 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 _LOONGARCH_BITS_SETJMP_H
>+#define _LOONGARCH_BITS_SETJMP_H
>+
>+typedef struct __jmp_buf_internal_tag
>+{
>+ /* Program counter. */
>+ long int __pc;
>+ /* Stack pointer. */
>+ long int __sp;
>+ /* Reserved */
>+ long int __x;
>+ /* Frame pointer. */
>+ long int __fp;
>+ /* Callee-saved registers. */
>+ long int __regs[9];
>+
>+#ifndef __loongarch_soft_float
>+ /* Callee-saved floating point registers. */
>+ double __fpregs[8];
>+#endif
>+
>+} __jmp_buf[1];
>+
>+#endif /* _LOONGARCH_BITS_SETJMP_H */
>diff --git a/sysdeps/loongarch/bsd-_setjmp.c b/sysdeps/loongarch/bsd-_setjmp.c
>new file mode 100644
>index 0000000000..32f49441c3
>--- /dev/null
>+++ b/sysdeps/loongarch/bsd-_setjmp.c
>@@ -0,0 +1 @@
>+/* _setjmp is implemented in setjmp.S. */
>diff --git a/sysdeps/loongarch/bsd-setjmp.c b/sysdeps/loongarch/bsd-setjmp.c
>new file mode 100644
>index 0000000000..45fd802aac
>--- /dev/null
>+++ b/sysdeps/loongarch/bsd-setjmp.c
>@@ -0,0 +1 @@
>+/* setjmp is implemented in setjmp.S. */
>diff --git a/sysdeps/loongarch/dl-machine.h b/sysdeps/loongarch/dl-machine.h
>new file mode 100644
>index 0000000000..68b68e677d
>--- /dev/null
>+++ b/sysdeps/loongarch/dl-machine.h
>@@ -0,0 +1,362 @@
>+/* Machine-dependent ELF dynamic relocation inline functions.
>+ Copyright (C) 2022 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 dl_machine_h
>+#define dl_machine_h
>+
>+#define ELF_MACHINE_NAME "LoongArch"
>+
>+#include <entry.h>
>+#include <elf/elf.h>
>+#include <sys/asm.h>
>+#include <dl-tls.h>
>+#include <dl-static-tls.h>
>+#include <dl-machine-rel.h>
>+
>+#ifndef _RTLD_PROLOGUE
>+# define _RTLD_PROLOGUE(entry) \
>+ ".globl\t" __STRING (entry) "\n\t" \
>+ ".type\t" __STRING (entry) ", @function\n\t" \
>+ CFI_STARTPROC "\n" \
>+ __STRING (entry) ":\n"
>+#endif
>+
>+#ifndef _RTLD_EPILOGUE
>+# define _RTLD_EPILOGUE(entry) \
>+ CFI_ENDPROC "\n\t" \
>+ ".size\t" __STRING (entry) ", . - " __STRING (entry) "\n"
>+#endif
>+
>+#define ELF_MACHINE_JMP_SLOT R_LARCH_JUMP_SLOT
>+#define ELF_MACHINE_IRELATIVE R_LARCH_IRELATIVE
>+
>+#define elf_machine_type_class(type) \
>+ ((ELF_RTYPE_CLASS_PLT * ((type) == ELF_MACHINE_JMP_SLOT \
>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPREL32) \
>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_DTPMOD32) \
>+ || (__WORDSIZE == 32 && (type) == R_LARCH_TLS_TPREL32) \
>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPREL64) \
>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_DTPMOD64) \
>+ || (__WORDSIZE == 64 && (type) == R_LARCH_TLS_TPREL64))) \
>+ | (ELF_RTYPE_CLASS_COPY * ((type) == R_LARCH_COPY)))
>+
>+#define ELF_MACHINE_NO_REL 1
>+#define ELF_MACHINE_NO_RELA 0
>+
>+/* Return nonzero iff ELF header is compatible with the running host. */
>+static inline int __attribute_used__
>+elf_machine_matches_host (const ElfW (Ehdr) * ehdr)
>+{
>+ /* We can only run LoongArch binaries. */
>+ if (ehdr->e_machine != EM_LOONGARCH)
>+ return 0;
>+
>+ return 1;
>+}
>+
>+/* Runtime address of .got */
>+#define _GLOBAL_OFFSET_TABLE_ \
>+ ({ \
>+ ElfW (Addr) * r; \
>+ asm("la.pcrel %0, _GLOBAL_OFFSET_TABLE_" : "=r"(r)); \
>+ r; \
>+ })
>+
>+/* Return the link-time address of _DYNAMIC. */
>+static inline ElfW (Addr) elf_machine_dynamic (void)
>+{
>+ return _GLOBAL_OFFSET_TABLE_[0];
>+}
>+
>+#define STRINGXP(X) __STRING (X)
>+#define STRINGXV(X) STRINGV_ (X)
>+#define STRINGV_(...) #__VA_ARGS__
>+
>+/* Return the run-time load address of the shared object. */
>+static inline ElfW (Addr) elf_machine_load_address (void)
>+{
>+ ElfW (Addr) got_linktime_addr;
>+ asm("la.got %0, _GLOBAL_OFFSET_TABLE_"
>+ /* Link-time address in GOT entry before runtime relocation */
>+ : "=r"(got_linktime_addr));
>+ return (ElfW (Addr)) _GLOBAL_OFFSET_TABLE_ - got_linktime_addr;
>+}
>+
>+/* Initial entry point code for the dynamic linker.
>+ The C function `_dl_start' is the real entry point;
>+ its return value is the user program's entry point. */
>+
>+#define RTLD_START \
>+ asm(".text\n\
>+ " _RTLD_PROLOGUE (ENTRY_POINT) "\
>+ .cfi_label .Ldummy \n\
>+ " CFI_UNDEFINED (1) " \n\
>+ or $a0, $sp, $zero \n\
>+ bl _dl_start \n\
>+ # Stash user entry point in s0. \n\
>+ or $s0, $v0, $zero \n\
>+ # See if we were run as a command with the executable file \n\
>+ # name as an extra leading argument. \n\
>+ la $a0, _dl_skip_args \n\
>+ ld.w $a0, $a0, 0 \n\
>+ # Load the original argument count. \n\
>+ ld.d $a1, $sp, 0 \n\
>+ # Subtract _dl_skip_args from it. \n\
>+ sub.d $a1, $a1, $a0 \n\
>+ # Adjust the stack pointer to skip _dl_skip_args words. \n\
>+ slli.d $a0, $a0, 3 \n\
>+ add.d $sp, $sp, $a0 \n\
>+ # Save back the modified argument count. \n\
>+ st.d $a1, $sp, 0 \n\
>+ # Call _dl_init (struct link_map *main_map, int argc, char **argv, \
>+ char **env) \n\
>+ la $a0, _rtld_local \n\
>+ ld.d $a0, $a0, 0 \n\
>+ addi.d $a2, $sp, 8 \n\
>+ slli.d $a3, $a1, 3 \n\
>+ add.d $a3, $a3, $a2 \n\
>+ addi.d $a3, $a3, 8 \n\
>+ # Adjust $sp for 16-aligned \n\
>+ srli.d $t0, $sp, 4 \n\
>+ slli.d $t0, $t0, 4 \n\
>+ ori $t1, $sp, 0 \n\
>+ addi.d $sp, $t0, -32 \n\
>+ st.d $t1, $sp, 24 \n\
>+ # Call the function to run the initializers. \n\
>+ bl _dl_init \n\
>+ # Pass our finalizer function to _start. \n\
>+ ld.d $sp, $sp, 24 \n\
>+ la $a0, _dl_fini \n\
>+ # Jump to the user entry point. \n\
>+ jirl $zero, $s0, 0 \n\
>+ " _RTLD_EPILOGUE (ENTRY_POINT) "\
>+ .previous");
>+
>+/* Names of the architecture-specific auditing callback functions. */
>+#define ARCH_LA_PLTENTER loongarch_gnu_pltenter
>+#define ARCH_LA_PLTEXIT loongarch_gnu_pltexit
>+
>+/* Bias .got.plt entry by the offset requested by the PLT header. */
>+#define elf_machine_plt_value(map, reloc, value) (value)
>+
>+static inline ElfW (Addr)
>+ elf_machine_fixup_plt (struct link_map *map, lookup_t t,
>+ const ElfW (Sym) * refsym, const ElfW (Sym) * sym,
>+ const ElfW (Rela) * reloc, ElfW (Addr) * reloc_addr,
>+ ElfW (Addr) value)
>+{
>+ return *reloc_addr = value;
>+}
>+
>+#endif /* !dl_machine_h */
>+
>+#ifdef RESOLVE_MAP
>+
>+/* Perform a relocation described by R_INFO at the location pointed to
>+ by RELOC_ADDR. SYM is the relocation symbol specified by R_INFO and
>+ MAP is the object containing the reloc. */
>+
>+static inline void __attribute__ ((always_inline))
>+elf_machine_rela (struct link_map *map, struct r_scope_elem *scope[],
>+ const ElfW (Rela) * reloc,
>+ const ElfW (Sym) * sym,
>+ const struct r_found_version *version,
>+ void *const reloc_addr, int skip_ifunc)
>+{
>+ ElfW (Addr) r_info = reloc->r_info;
>+ const unsigned long int r_type = ELFW (R_TYPE) (r_info);
>+ ElfW (Addr) *addr_field = (ElfW (Addr) *) reloc_addr;
>+ const ElfW (Sym) *const __attribute__ ((unused)) refsym = sym;
>+ struct link_map *sym_map = RESOLVE_MAP (map, scope, &sym, version, r_type);
>+ ElfW (Addr) value = 0;
>+ if (sym_map != NULL)
>+ value = SYMBOL_ADDRESS (sym_map, sym, true) + reloc->r_addend;
>+
>+ if (sym != NULL
>+ && __builtin_expect (ELFW (ST_TYPE) (sym->st_info) == STT_GNU_IFUNC, 0)
>+ && __builtin_expect (sym->st_shndx != SHN_UNDEF, 1)
>+ && __builtin_expect (!skip_ifunc, 1))
>+ value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap));
>+
>+ switch (r_type)
>+ {
>+#ifndef RTLD_BOOTSTRAP
>+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64:
>+ R_LARCH_TLS_DTPMOD32:
>+ if (sym_map)
>+ *addr_field = sym_map->l_tls_modid;
>+ break;
>+
>+ case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64:
>+ R_LARCH_TLS_DTPREL32:
>+ if (sym != NULL)
>+ *addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend;
>+ break;
>+
>+ case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64:
>+ R_LARCH_TLS_TPREL32:
>+ if (sym != NULL)
>+ {
>+ CHECK_STATIC_TLS (map, sym_map);
>+ *addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend;
>+ }
>+ break;
>+
>+ case R_LARCH_COPY:
>+ {
>+ if (__glibc_unlikely (sym == NULL))
>+ /* This can happen in trace mode if an object could not be
>+ found. */
>+ break;
>+
>+ /* Handle TLS copy relocations. */
>+ if (__glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == STT_TLS))
>+ {
>+ /* There's nothing to do if the symbol is in .tbss. */
>+ if (__glibc_likely (sym->st_value
>+ >= sym_map->l_tls_initimage_size))
>+ break;
>+ value += (ElfW (Addr)) sym_map->l_tls_initimage - sym_map->l_addr;
>+ }
Please don't copy TLS copy relocations from riscv. It was a mistake:
https://sourceware.org/bugzilla/show_bug.cgi?id=23825
>+ size_t size = sym->st_size;
>+ if (__glibc_unlikely (sym->st_size != refsym->st_size))
>+ {
>+ const char *strtab = (const void *) D_PTR (map, l_info[DT_STRTAB]);
>+ if (sym->st_size > refsym->st_size)
>+ size = refsym->st_size;
>+ if (sym->st_size > refsym->st_size || GLRO (dl_verbose))
>+ _dl_error_printf ("\
>+ %s: Symbol `%s' has different size in shared object, consider re-linking\n",
>+ rtld_progname ?: "<program name unknown>",
>+ strtab + refsym->st_name);
>+ }
>+
>+ memcpy (reloc_addr, (void *) value, size);
>+ break;
>+ }
>+#endif
>+
>+#if !defined RTLD_BOOTSTRAP || !defined HAVE_Z_COMBRELOC
>+ case R_LARCH_RELATIVE:
I have recently removed HAVE_Z_COMBRELOC. Please remove it here.
>+ {
>+#if !defined RTLD_BOOTSTRAP && !defined HAVE_Z_COMBRELOC
>+ /* This is defined in rtld.c, but nowhere in the static libc.a;
>+ make the reference weak so static programs can still link.
>+ This declaration cannot be done when compiling rtld.c
>+ (i.e. #ifdef RTLD_BOOTSTRAP) because rtld.c contains the
>+ common defn for _dl_rtld_map, which is incompatible with a
>+ weak decl in the same file. */
>+#ifndef SHARED
>+ weak_extern (GL (dl_rtld_map));
>+#endif
>+ if (map != &GL (dl_rtld_map)) /* Already done in rtld itself. */
>+#endif
>+ *addr_field = map->l_addr + reloc->r_addend;
>+ break;
>+ }
>+#endif
>+
>+ case R_LARCH_JUMP_SLOT:
>+ case __WORDSIZE == 64 ? R_LARCH_64:
>+ R_LARCH_32:
>+ *addr_field = value;
>+ break;
>+
>+ case R_LARCH_IRELATIVE:
>+ value = map->l_addr + reloc->r_addend;
>+ if (__glibc_likely (!skip_ifunc))
>+ value = ((ElfW (Addr) (*) (void)) value) ();
>+ *addr_field = value;
>+ break;
>+
>+ case R_LARCH_NONE:
>+ break;
>+ default:
>+ _dl_reloc_bad_type (map, r_type, 0);
>+ break;
>+ }
>+}
>+
>+static inline void __attribute__ ((always_inline))
>+elf_machine_rela_relative (ElfW (Addr) l_addr, const ElfW (Rela) * reloc,
>+ void *const reloc_addr)
>+{
>+ *(ElfW (Addr) *) reloc_addr = l_addr + reloc->r_addend;
>+}
>+
>+static inline void __attribute__ ((always_inline))
>+elf_machine_lazy_rel (struct link_map *map, struct r_scope_elem *scope[],
>+ ElfW (Addr) l_addr,
>+ const ElfW (Rela) * reloc, int skip_ifunc)
>+{
>+ ElfW (Addr) *const reloc_addr = (void *) (l_addr + reloc->r_offset);
>+ const unsigned int r_type = ELFW (R_TYPE) (reloc->r_info);
>+
>+ /* Check for unexpected PLT reloc type. */
>+ if (__glibc_likely (r_type == R_LARCH_JUMP_SLOT))
>+ {
>+ if (__glibc_unlikely (map->l_mach.plt == 0))
>+ {
>+ if (l_addr)
>+ *reloc_addr += l_addr;
>+ }
>+ else
>+ *reloc_addr = map->l_mach.plt;
>+ }
>+ else if (__glibc_unlikely (r_type == R_LARCH_IRELATIVE))
>+ {
>+ ElfW (Addr) *value = (void *) (l_addr + reloc->r_addend);
>+ if (__glibc_likely (!skip_ifunc))
>+ value = (ElfW (Addr) *) ((ElfW (Addr) (*) (void)) value) ();
>+ *reloc_addr = (ElfW (Addr)) value;
>+ }
>+ else
>+ _dl_reloc_bad_type (map, r_type, 1);
>+}
If you can ensure ld doesn't place IRELATIVE in .rela.plt, you can drop
IRELATIVE check in this function.
>+/* Set up the loaded object described by L so its stub function
>+ will jump to the on-demand fixup code __dl_runtime_resolve. */
>+
>+static inline int __attribute__ ((always_inline))
>+elf_machine_runtime_setup (struct link_map *l, struct r_scope_elem *scope[],
>+ int lazy, int profile)
>+{
>+#ifndef RTLD_BOOTSTRAP
>+ /* If using PLTs, fill in the first two entries of .got.plt. */
>+ if (l->l_info[DT_JMPREL])
>+ {
>+ extern void _dl_runtime_resolve (void)
>+ __attribute__ ((visibility ("hidden")));
>+ ElfW (Addr) *gotplt = (ElfW (Addr) *) D_PTR (l, l_info[DT_PLTGOT]);
>+ /* If a library is prelinked but we have to relocate anyway,
>+ we have to be able to undo the prelinking of .got.plt.
>+ The prelinker saved the address of .plt for us here. */
prelink has been deprecated and will be removed. You can drop complexity
here and avoid mentioning prelink.
>+ if (gotplt[1])
>+ l->l_mach.plt = gotplt[1] + l->l_addr;
>+ gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve;
>+ gotplt[1] = (ElfW (Addr)) l;
>+ }
>+#endif
>+
>+ return lazy;
>+}
>+
>+#endif /* RESOLVE_MAP */
>diff --git a/sysdeps/loongarch/dl-trampoline.S b/sysdeps/loongarch/dl-trampoline.S
>new file mode 100644
>index 0000000000..eb610392f6
>--- /dev/null
>+++ b/sysdeps/loongarch/dl-trampoline.S
>@@ -0,0 +1,91 @@
>+/* PLT trampolines.
>+ Copyright (C) 2022 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 <sys/asm.h>
>+
>+/* Assembler veneer called from the PLT header code for lazy loading.
>+ The PLT header passes its own args in t0-t2. */
>+
>+#ifdef __loongarch_soft_float
>+# define FRAME_SIZE (-((-10 * SZREG) & ALMASK))
>+#else
>+# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK))
>+#endif
>+
>+ENTRY (_dl_runtime_resolve)
>+
>+ /* Save arguments to stack. */
>+ ADDI sp, sp, -FRAME_SIZE
>+
>+ REG_S ra, sp, 9*SZREG
>+ REG_S a0, sp, 1*SZREG
>+ REG_S a1, sp, 2*SZREG
>+ REG_S a2, sp, 3*SZREG
>+ REG_S a3, sp, 4*SZREG
>+ REG_S a4, sp, 5*SZREG
>+ REG_S a5, sp, 6*SZREG
>+ REG_S a6, sp, 7*SZREG
>+ REG_S a7, sp, 8*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_S fa0, sp, 10*SZREG + 0*SZFREG
>+ FREG_S fa1, sp, 10*SZREG + 1*SZFREG
>+ FREG_S fa2, sp, 10*SZREG + 2*SZFREG
>+ FREG_S fa3, sp, 10*SZREG + 3*SZFREG
>+ FREG_S fa4, sp, 10*SZREG + 4*SZFREG
>+ FREG_S fa5, sp, 10*SZREG + 5*SZFREG
>+ FREG_S fa6, sp, 10*SZREG + 6*SZFREG
>+ FREG_S fa7, sp, 10*SZREG + 7*SZFREG
>+#endif
>+
>+ /* Update .got.plt and obtain runtime address of callee */
>+ SLLI a1, t1, 1
>+ or a0, t0, zero
>+ ADD a1, a1, t1
>+ la a2, _dl_fixup
>+ jirl ra, a2, 0
>+ or t1, v0, zero
>+
>+ /* Restore arguments from stack. */
>+ REG_L ra, sp, 9*SZREG
>+ REG_L a0, sp, 1*SZREG
>+ REG_L a1, sp, 2*SZREG
>+ REG_L a2, sp, 3*SZREG
>+ REG_L a3, sp, 4*SZREG
>+ REG_L a4, sp, 5*SZREG
>+ REG_L a5, sp, 6*SZREG
>+ REG_L a6, sp, 7*SZREG
>+ REG_L a7, sp, 8*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_L fa0, sp, 10*SZREG + 0*SZFREG
>+ FREG_L fa1, sp, 10*SZREG + 1*SZFREG
>+ FREG_L fa2, sp, 10*SZREG + 2*SZFREG
>+ FREG_L fa3, sp, 10*SZREG + 3*SZFREG
>+ FREG_L fa4, sp, 10*SZREG + 4*SZFREG
>+ FREG_L fa5, sp, 10*SZREG + 5*SZFREG
>+ FREG_L fa6, sp, 10*SZREG + 6*SZFREG
>+ FREG_L fa7, sp, 10*SZREG + 7*SZFREG
>+#endif
>+
>+ ADDI sp, sp, FRAME_SIZE
>+
>+ /* Invoke the callee. */
>+ jirl zero, t1, 0
>+END (_dl_runtime_resolve)
>diff --git a/sysdeps/loongarch/jmpbuf-offsets.h b/sysdeps/loongarch/jmpbuf-offsets.h
>new file mode 100644
>index 0000000000..a4b8ea690e
>--- /dev/null
>+++ b/sysdeps/loongarch/jmpbuf-offsets.h
>@@ -0,0 +1,22 @@
>+/* Private macros for accessing __jmp_buf contents.
>+ Copyright (C) 2022 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 <jmpbuf-unwind.h>
>+
>+/* Helper for generic ____longjmp_chk(). */
>+#define JB_FRAME_ADDRESS(buf) ((void *) _jmpbuf_sp (buf))
>diff --git a/sysdeps/loongarch/jmpbuf-unwind.h b/sysdeps/loongarch/jmpbuf-unwind.h
>new file mode 100644
>index 0000000000..6fa509151d
>--- /dev/null
>+++ b/sysdeps/loongarch/jmpbuf-unwind.h
>@@ -0,0 +1,45 @@
>+/* Examine __jmp_buf for unwinding frames.
>+ Copyright (C) 2022 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 <stdint.h>
>+#include <unwind.h>
>+#include <sysdep.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)[0].__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 regs)
>+{
>+ uintptr_t sp = regs[0].__sp;
>+#ifdef PTR_DEMANGLE
>+ PTR_DEMANGLE (sp);
>+#endif
>+ return sp;
>+}
>+
>+#define _JMPBUF_UNWINDS_ADJ(_jmpbuf, _address, _adj) \
>+ ((uintptr_t) (_address) - (_adj) < _jmpbuf_sp (_jmpbuf) - (_adj))
>+
>+/* We use the normal longjmp for unwinding. */
>+#define __libc_unwind_longjmp(buf, val) __libc_longjmp (buf, val)
>diff --git a/sysdeps/loongarch/ldsodefs.h b/sysdeps/loongarch/ldsodefs.h
>new file mode 100644
>index 0000000000..36b1b25b9f
>--- /dev/null
>+++ b/sysdeps/loongarch/ldsodefs.h
>@@ -0,0 +1,41 @@
>+/* Run-time dynamic linker data structures for loaded ELF shared objects.
>+ Copyright (C) 2022 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 _LOONGARCH_LDSODEFS_H
>+#define _LOONGARCH_LDSODEFS_H 1
>+
>+#include <elf.h>
>+
>+struct La_loongarch_regs;
>+struct La_loongarch_retval;
>+
>+#define ARCH_PLTENTER_MEMBERS \
>+ ElfW (Addr) (*loongarch_gnu_pltenter) (ElfW (Sym) *, unsigned int, \
>+ uintptr_t *, uintptr_t *, \
>+ const struct La_loongarch_regs *, \
>+ unsigned int *, const char *name, \
>+ long int *framesizep);
>+
>+#define ARCH_PLTEXIT_MEMBERS \
>+ unsigned int (*loongarch_gnu_pltexit) (ElfW (Sym) *, unsigned int, \
>+ uintptr_t *, uintptr_t *, const struct La_loongarch_regs *, \
>+ struct La_loongarch_retval *, const char *);
>+
>+#include_next <ldsodefs.h>
>+
>+#endif
>diff --git a/sysdeps/loongarch/linkmap.h b/sysdeps/loongarch/linkmap.h
>new file mode 100644
>index 0000000000..bbba73ed70
>--- /dev/null
>+++ b/sysdeps/loongarch/linkmap.h
>@@ -0,0 +1,22 @@
>+/* Definition of link_map_machine.
>+ Copyright (C) 2022 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/>. */
>+
>+struct link_map_machine
>+{
>+ ElfW (Addr) plt; /* Address of .plt. */
>+};
>diff --git a/sysdeps/loongarch/machine-gmon.h b/sysdeps/loongarch/machine-gmon.h
>new file mode 100644
>index 0000000000..4a3cdd964e
>--- /dev/null
>+++ b/sysdeps/loongarch/machine-gmon.h
>@@ -0,0 +1,37 @@
>+/* LoongArch definitions for profiling support.
>+ Copyright (C) 2022 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/>. */
>+
>+/* Accept 'frompc' address as argument from the function that calls
>+ _mcount for profiling. Use __builtin_return_address (0)
>+ for the 'selfpc' address. */
>+
>+#include <sysdep.h>
>+
>+static void mcount_internal (unsigned long int frompc,
>+ unsigned long int selfpc);
>+
>+#define _MCOUNT_DECL(frompc, selfpc) \
>+ static inline void mcount_internal (unsigned long int frompc, \
>+ unsigned long int selfpc)
>+
>+#define MCOUNT \
>+ void _mcount (void *frompc) \
>+ { \
>+ mcount_internal ((unsigned long int) frompc, \
>+ (unsigned long int) RETURN_ADDRESS (0)); \
>+ }
>diff --git a/sysdeps/loongarch/setjmp.S b/sysdeps/loongarch/setjmp.S
>new file mode 100644
>index 0000000000..b93ae2f5da
>--- /dev/null
>+++ b/sysdeps/loongarch/setjmp.S
>@@ -0,0 +1,66 @@
>+/* setjmp for LoongArch.
>+ Copyright (C) 2022 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 <sys/asm.h>
>+
>+ENTRY (_setjmp)
>+ li.w a1,0
>+ b __sigsetjmp
>+END (_setjmp)
>+
>+ENTRY (setjmp)
>+ li.w a1,1
>+END (setjmp)
>+
>+ENTRY (__sigsetjmp)
>+ REG_S ra, a0, 0*SZREG
>+ REG_S sp, a0, 1*SZREG
>+ REG_S x, a0, 2*SZREG
>+ REG_S fp, a0, 3*SZREG
>+ REG_S s0, a0, 4*SZREG
>+ REG_S s1, a0, 5*SZREG
>+ REG_S s2, a0, 6*SZREG
>+ REG_S s3, a0, 7*SZREG
>+ REG_S s4, a0, 8*SZREG
>+ REG_S s5, a0, 9*SZREG
>+ REG_S s6, a0, 10*SZREG
>+ REG_S s7, a0, 11*SZREG
>+ REG_S s8, a0, 12*SZREG
>+
>+#ifndef __loongarch_soft_float
>+ FREG_S $f24, a0, 13*SZREG + 0*SZFREG
>+ FREG_S $f25, a0, 13*SZREG + 1*SZFREG
>+ FREG_S $f26, a0, 13*SZREG + 2*SZFREG
>+ FREG_S $f27, a0, 13*SZREG + 3*SZFREG
>+ FREG_S $f28, a0, 13*SZREG + 4*SZFREG
>+ FREG_S $f29, a0, 13*SZREG + 5*SZFREG
>+ FREG_S $f30, a0, 13*SZREG + 6*SZFREG
>+ FREG_S $f31, a0, 13*SZREG + 7*SZFREG
>+#endif
>+
>+#if !IS_IN (libc) && IS_IN(rtld)
>+ li.w v0, 0
>+ jirl zero,ra,0
>+#else
>+ b __sigjmp_save
>+#endif
>+END (__sigsetjmp)
>+
>+hidden_def (__sigsetjmp)
>+weak_alias (_setjmp, __GI__setjmp)
>diff --git a/sysdeps/loongarch/sotruss-lib.c b/sysdeps/loongarch/sotruss-lib.c
>new file mode 100644
>index 0000000000..5b15f4815a
>--- /dev/null
>+++ b/sysdeps/loongarch/sotruss-lib.c
>@@ -0,0 +1,50 @@
>+/* Override generic sotruss-lib.c to define actual functions for LoongArch.
>+ Copyright (C) 2022 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 HAVE_ARCH_PLTENTER
>+#define HAVE_ARCH_PLTEXIT
>+
>+#include <elf/sotruss-lib.c>
>+
>+ElfW (Addr)
>+la_loongarch_gnu_pltenter (ElfW (Sym) * sym __attribute__ ((unused)),
>+ unsigned int ndx __attribute__ ((unused)),
>+ uintptr_t *refcook, uintptr_t *defcook,
>+ La_loongarch_regs *regs, unsigned int *flags,
>+ const char *symname, long int *framesizep)
>+{
>+ print_enter (refcook, defcook, symname, regs->lr_reg[0], regs->lr_reg[1],
>+ regs->lr_reg[2], *flags);
>+
>+ /* No need to copy anything, we will not need the parameters in any case. */
>+ *framesizep = 0;
>+
>+ return sym->st_value;
>+}
>+
>+unsigned int
>+la_loongarch_gnu_pltexit (ElfW (Sym) * sym, unsigned int ndx,
>+ uintptr_t *refcook, uintptr_t *defcook,
>+ const struct La_loongarch_regs *inregs,
>+ struct La_loongarch_retval *outregs,
>+ const char *symname)
>+{
>+ print_exit (refcook, defcook, symname, outregs->lrv_a0);
>+
>+ return 0;
>+}
>diff --git a/sysdeps/loongarch/start.S b/sysdeps/loongarch/start.S
>new file mode 100644
>index 0000000000..a9b32aa966
>--- /dev/null
>+++ b/sysdeps/loongarch/start.S
>@@ -0,0 +1,67 @@
>+/* Startup code compliant to the ELF LoongArch ABI.
>+ Copyright (C) 2022 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 __ASSEMBLY__ 1
>+#include <entry.h>
>+#include <sys/asm.h>
>+
>+/* The entry point's job is to call __libc_start_main. Per the ABI,
>+ a0 contains the address of a function to be passed to atexit.
>+ __libc_start_main wants this in a5. */
>+
>+/*
>+int
>+__libc_start_main (int (*main) (int, char **, char **),
>+ int argc,
>+ char **argv,
>+ __typeof (main) init,
>+ void (*fini) (void),
>+ void (*rtld_fini) (void),
>+ void *stack_end);
>+ */
>+
>+ENTRY (ENTRY_POINT)
>+
>+/* Terminate call stack by noting ra is undefined. Use a dummy
>+ .cfi_label to force starting the FDE. */
>+ .cfi_label .Ldummy
>+ cfi_undefined (1)
>+ or a5, a0, zero /* rtld_fini */
>+
>+/* We must get symbol main through GOT table, since main may not be local.
>+ For instance: googletest defines main in dynamic library. */
>+ la.got a0, t0, main
>+ REG_L a1, sp, 0
>+ ADDI a2, sp, SZREG
>+
>+ /* Adjust $sp for 16-aligned */
>+ SRLI sp, sp, 4
>+ SLLI sp, sp, 4
>+
>+ move a3, zero /* used to be init */
>+ move a4, zero /* used to be fini */
>+ or a6, sp, zero /* stack_end */
>+
>+ la.got ra, t0, __libc_start_main
>+ jirl ra, ra, 0
>+
>+ la.got ra, t0, abort
>+ jirl ra, ra, 0
>+END (ENTRY_POINT)
>+
>diff --git a/sysdeps/loongarch/sys/asm.h b/sysdeps/loongarch/sys/asm.h
>new file mode 100644
>index 0000000000..b41ee59694
>--- /dev/null
>+++ b/sysdeps/loongarch/sys/asm.h
>@@ -0,0 +1,59 @@
>+/* Miscellaneous macros.
>+ Copyright (C) 2022 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 _SYS_ASM_H
>+#define _SYS_ASM_H
>+
>+#include <sys/regdef.h>
>+#include <sysdeps/generic/sysdep.h>
>+
>+/* Macros to handle different pointer/register sizes for 32/64-bit code. */
>+#define SZREG 8
>+#define SZFREG 8
>+#define REG_L ld.d
>+#define REG_S st.d
>+#define SRLI srli.d
>+#define SLLI slli.d
>+#define ADDI addi.d
>+#define ADD add.d
>+#define BSTRINS bstrins.d
>+#define LI li.d
>+#define FREG_L fld.d
>+#define FREG_S fst.d
>+
>+/* Declare leaf routine. */
>+#define LEAF(symbol) \
>+ .text; \
>+ .globl symbol; \
>+ .align 3; \
>+ cfi_startproc; \
>+ .type symbol, @function; \
>+ symbol:
>+
>+#define ENTRY(symbol) LEAF (symbol)
>+
>+/* Mark end of function. */
>+#undef END
>+#define END(function) \
>+ cfi_endproc; \
>+ .size function, .- function;
>+
>+/* Stack alignment. */
>+#define ALMASK ~15
>+
>+#endif /* sys/asm.h */
>diff --git a/sysdeps/loongarch/tst-audit.h b/sysdeps/loongarch/tst-audit.h
>new file mode 100644
>index 0000000000..e71948c86e
>--- /dev/null
>+++ b/sysdeps/loongarch/tst-audit.h
>@@ -0,0 +1,23 @@
>+/* Definitions for testing PLT entry/exit auditing.
>+ Copyright (C) 2022 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 pltenter la_loongarch_gnu_pltenter
>+#define pltexit la_loongarch_gnu_pltexit
>+#define La_regs La_loongarch_regs
>+#define La_retval La_loongarch_retval
>+#define int_retval lrv_a0
>diff --git a/sysdeps/unix/sysv/linux/loongarch/ldconfig.h b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h
>new file mode 100644
>index 0000000000..4887c30ca2
>--- /dev/null
>+++ b/sysdeps/unix/sysv/linux/loongarch/ldconfig.h
>@@ -0,0 +1,26 @@
>+/* ldconfig default paths and libraries.
>+ Copyright (C) 2022 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 <sysdeps/generic/ldconfig.h>
>+
>+#define SYSDEP_KNOWN_INTERPRETER_NAMES \
>+ { "/lib64/ld-linux-loongarch-lp64d.so.1", FLAG_ELF_LIBC6 },
>+
>+#define SYSDEP_KNOWN_LIBRARY_NAMES \
>+ { "libc.so.6", FLAG_ELF_LIBC6 }, \
>+ { "libm.so.6", FLAG_ELF_LIBC6 },
>--
>2.31.1
>
next prev parent reply other threads:[~2022-05-09 8:20 UTC|newest]
Thread overview: 20+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-05-09 2:29 [PATCH v4 00/13] GLIBC LoongArch PATCHES caiyinyu
2022-05-09 2:29 ` [PATCH v4 01/13] LoongArch: Update NEWS and README for the LoongArch port caiyinyu
2022-05-09 2:29 ` [PATCH v4 02/13] LoongArch: Add LoongArch entries to config.h.in caiyinyu
2022-05-09 2:30 ` [PATCH v4 03/13] LoongArch: Add relocations and ELF flags to elf.h and scripts/glibcelf.py caiyinyu
2022-05-09 2:30 ` [PATCH v4 04/13] LoongArch: ABI Implementation caiyinyu
2022-05-09 7:56 ` Fangrui Song
2022-05-24 9:49 ` 回复: " caiyinyu
2022-05-24 19:55 ` Fangrui Song
2022-05-09 8:20 ` Fangrui Song [this message]
2022-05-09 11:33 ` Adhemerval Zanella
2022-05-09 12:39 ` Adhemerval Zanella
2022-05-09 12:46 ` Florian Weimer
2022-05-29 13:10 ` Adhemerval Zanella
2022-05-09 2:30 ` [PATCH v4 05/13] LoongArch: Thread-Local Storage Support caiyinyu
2022-05-09 2:30 ` [PATCH v4 06/13] LoongArch: Generic <math.h> and soft-fp Routines caiyinyu
2022-05-09 2:30 ` [PATCH v4 07/13] LoongArch: Atomic and Locking Routines caiyinyu
2022-05-09 2:30 ` [PATCH v4 08/13] LoongArch: Linux Syscall Interface caiyinyu
2022-05-09 2:30 ` [PATCH v4 09/13] LoongArch: Linux ABI caiyinyu
2022-05-09 2:30 ` [PATCH v4 10/13] LoongArch: Add ABI Lists caiyinyu
-- strict thread matches above, loose matches on Subject: below --
2022-05-09 2:25 [PATCH v3 00/13] GLIBC LoongArch PATCHES caiyinyu
2022-05-09 2:26 ` [PATCH v4 04/13] LoongArch: ABI Implementation caiyinyu
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