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LoongArch: ABI Implementation

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caiyinyu 2022-07-19 09:20:46 +08:00 committed by Adhemerval Zanella
parent 2d83247d90
commit a133942025
18 changed files with 959 additions and 0 deletions
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50
sysdeps/loongarch/__longjmp.S Normal file
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/* 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
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
sltui a0,a1,1
ADD a0, a0, a1 # a0 = (a1 == 0) ? 1 : a1
jirl zero,ra,0
END (__longjmp)

11
sysdeps/loongarch/bits/endianness.h Normal file
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#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 */

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sysdeps/loongarch/bits/link.h Normal file
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/* 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

39
sysdeps/loongarch/bits/setjmp.h Normal file
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/* 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];
/* Callee-saved floating point registers. */
double __fpregs[8];
} __jmp_buf[1];
#endif /* _LOONGARCH_BITS_SETJMP_H */

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sysdeps/loongarch/bsd-_setjmp.c Normal file
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/* _setjmp is implemented in setjmp.S. */

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sysdeps/loongarch/bsd-setjmp.c Normal file
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/* setjmp is implemented in setjmp.S. */

288
sysdeps/loongarch/dl-machine.h Normal file
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/* 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)) \
| (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
elf_machine_matches_host (const ElfW (Ehdr) *ehdr)
{
/* We can only run LoongArch binaries. */
if (ehdr->e_machine != EM_LOONGARCH)
return 0;
return 1;
}
/* Return the run-time load address of the shared object. */
static inline ElfW (Addr) elf_machine_load_address (void)
{
extern const ElfW(Ehdr) __ehdr_start attribute_hidden;
return (ElfW(Addr)) &__ehdr_start;
}
/* Return the link-time address of _DYNAMIC. */
static inline ElfW (Addr) elf_machine_dynamic (void)
{
extern ElfW(Dyn) _DYNAMIC[] attribute_hidden;
return (ElfW(Addr)) _DYNAMIC - elf_machine_load_address ();
}
/* 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\
# Load the original argument count. \n\
ld.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\
# Stash the stack pointer in s1.\n\
or $s1, $sp, $zero \n\
# Adjust $sp for 16-aligned \n\
bstrins.d $sp, $zero, 3, 0 \n\
# Call the function to run the initializers. \n\
bl _dl_init \n\
# Restore the stack pointer for _start.\n\
or $sp, $s1, $zero \n\
# Pass our finalizer function to _start. \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
&& __glibc_unlikely (ELFW (ST_TYPE) (sym->st_info) == STT_GNU_IFUNC)
&& __glibc_likely (sym->st_shndx != SHN_UNDEF)
&& __glibc_likely (!skip_ifunc))
value = ((ElfW (Addr) (*) (int)) value) (GLRO (dl_hwcap));
switch (r_type)
{
case R_LARCH_JUMP_SLOT:
case __WORDSIZE == 64 ? R_LARCH_64:
R_LARCH_32:
*addr_field = value;
break;
case R_LARCH_NONE:
break;
#ifndef RTLD_BOOTSTRAP
case __WORDSIZE == 64 ? R_LARCH_TLS_DTPMOD64:
R_LARCH_TLS_DTPMOD32:
*addr_field = sym_map->l_tls_modid;
break;
case __WORDSIZE == 64 ? R_LARCH_TLS_DTPREL64:
R_LARCH_TLS_DTPREL32:
*addr_field = TLS_DTPREL_VALUE (sym) + reloc->r_addend;
break;
case __WORDSIZE == 64 ? R_LARCH_TLS_TPREL64:
R_LARCH_TLS_TPREL32:
CHECK_STATIC_TLS (map, sym_map);
*addr_field = TLS_TPREL_VALUE (sym_map, sym) + reloc->r_addend;
break;
case R_LARCH_COPY:
{
if (sym == NULL)
/* This can happen in trace mode if an object could not be
found. */
break;
if (__glibc_unlikely (sym->st_size > refsym->st_size)
|| (__glibc_unlikely (sym->st_size < refsym->st_size)
&& GLRO(dl_verbose)))
{
const char *strtab;
strtab = (const char *) D_PTR (map, l_info[DT_STRTAB]);
_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,
MIN (sym->st_size, refsym->st_size));
break;
}
case R_LARCH_RELATIVE:
*addr_field = map->l_addr + reloc->r_addend;
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;
#endif
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
_dl_reloc_bad_type (map, r_type, 1);
}
/* 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]);
gotplt[0] = (ElfW (Addr)) & _dl_runtime_resolve;
gotplt[1] = (ElfW (Addr)) l;
}
#endif
return lazy;
}
#endif /* RESOLVE_MAP */

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sysdeps/loongarch/dl-trampoline.S Normal file
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/* 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. */
# define FRAME_SIZE (-((-10 * SZREG - 8 * SZFREG) & ALMASK))
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
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
/* 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
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
ADDI sp, sp, FRAME_SIZE
/* Invoke the callee. */
jirl zero, t1, 0
END (_dl_runtime_resolve)

22
sysdeps/loongarch/jmpbuf-offsets.h Normal file
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/* 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))

45
sysdeps/loongarch/jmpbuf-unwind.h Normal file
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/* 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)

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sysdeps/loongarch/ldsodefs.h Normal file
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/* 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

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sysdeps/loongarch/linkmap.h Normal file
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/* 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. */
};

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/* 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)); \
}

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/* 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 HIDDEN_JUMPTARGET (__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
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
#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)

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sysdeps/loongarch/sotruss-lib.c Normal file
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/* 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;
}

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sysdeps/loongarch/start.S Normal file
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/* 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 */
BSTRINS sp, zero, 3, 0
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)

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/* 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 */

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sysdeps/loongarch/tst-audit.h Normal file
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/* 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