nolibc changes for v7.4

Changes:
 * New architectures: Hexagon, 64-bit parisc
 * New library functionality: sendfile(), pread(), pwrite()
 * Various bugfixes and cleanups
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Merge tag 'nolibc-20261018-for-7.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/nolibc/linux-nolibc

Pull nolibc updates from Thomas Weißschuh:

 - New architectures: Hexagon, 64-bit parisc

 - New library functionality: sendfile(), pread(), pwrite()

 - Various bugfixes and cleanups

* tag 'nolibc-20261018-for-7.4-1' of git://git.kernel.org/pub/scm/linux/kernel/git/nolibc/linux-nolibc: (28 commits)
  selftests/nolibc: explicitly disable position independent executables
  selftests/nolibc: use the configured kernel header directory
  tools/nolibc: fix the function argument order of calloc()
  tools/nolibc: check for overflow in malloc()
  tools/nolibc: stop rounding malloc() sizes up to 4096 bytes
  tools/nolibc: add support for pread() and pwrite()
  tools/nolibc: introduce __NOLIBC_BITS_PER_SYSCALL_ARG
  tools/nolibc: move __NOLIBC_LLARGPART() to compiler.h
  tools/nolibc: make 64-bit systemcall argument padding generic
  selftests/nolibc: make the broken MIPS N32 argument detection reusable
  tools/nolibc: add 64-bit parisc support
  selftests/nolibc: test the FD_* macros
  tools/nolibc: fix FD_SET(), FD_CLR() and FD_ISSET() on 64-bit
  tools/nolibc: fix readdir_r() with 64-bit directory offsets
  tools/nolibc: fix verrx() and errx() message formatting
  selftests/nolibc: add tests for the wait status macros
  tools/nolibc: fix WIFSIGNALED() for status 0
  tools/nolibc/parisc: consistently use %dp to refer to register %r27
  selftests/nolibc: validate ENOTDIR return values from opendir()/fdopendir()
  tools/nolibc: verify that a directory is opened
  ...
This commit is contained in:
Linus Torvalds 2026-10-20 14:36:18 -10:00
commit 542fed2ef2
24 changed files with 562 additions and 62 deletions

View File

@ -17,7 +17,23 @@ endif
# it defaults to this nolibc directory.
OUTPUT ?= $(CURDIR)/
architectures := alpha arm arm64 loongarch m68k mips openrisc parisc powerpc riscv s390 sh sparc x86
architectures := \
alpha \
arm \
arm64 \
hexagon \
loongarch \
m68k \
mips \
openrisc \
parisc \
powerpc \
riscv \
s390 \
sh \
sparc \
x86 \
arch_files := arch.h $(addsuffix .h, $(addprefix arch-, $(architectures)))
all_files := \
alloca.h \
@ -59,6 +75,7 @@ all_files := \
sys/reboot.h \
sys/resource.h \
sys/select.h \
sys/sendfile.h \
sys/stat.h \
sys/syscall.h \
sys/sysmacros.h \

View File

@ -196,11 +196,6 @@ void __attribute__((weak, noreturn)) __nolibc_entrypoint __nolibc_no_stack_prote
}
#endif /* NOLIBC_NO_RUNTIME */
static __attribute__((unused))
int _sys_ftruncate64(int fd, uint32_t length0, uint32_t length1)
{
return __nolibc_syscall4(__NR_ftruncate64, fd, 0, length0, length1);
}
#define _sys_ftruncate64 _sys_ftruncate64
#define __NOLIBC_PAD_64BIT_SYSCALL_ARGUMENT_PAIR
#endif /* _NOLIBC_ARCH_ARM_H */

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@ -0,0 +1,159 @@
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
/*
* hexagon specific definitions for NOLIBC
* Copyright (C) 2026 Thomas Weißschuh <linux@weissschuh.net>
*/
#ifndef _NOLIBC_ARCH_HEXAGON_H
#define _NOLIBC_ARCH_HEXAGON_H
#include <linux/unistd.h>
#include "compiler.h"
#include "crt.h"
/*
* Syscalls for hexagon:
* - syscall number is passed in r6
* - arguments are in r0, r1, r2, r3, r4, r5
* - the system call is performed by calling trap0(#1)
* - syscall return value is in r0
*/
#define _NOLIBC_SYSCALL_CLOBBERLIST "memory"
#define __nolibc_syscall0(num) \
({ \
register long _num __asm__ ("r6") = (num); \
register long _arg1 __asm__ ("r0"); \
\
__asm__ volatile ( \
"trap0(#1)\n" \
: "=r"(_arg1) \
: "r"(_num) \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
#define __nolibc_syscall1(num, arg1) \
({ \
register long _num __asm__ ("r6") = (num); \
register long _arg1 __asm__ ("r0") = (long)(arg1); \
\
__asm__ volatile ( \
"trap0(#1)\n" \
: "+r"(_arg1) \
: "r"(_num) \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
#define __nolibc_syscall2(num, arg1, arg2) \
({ \
register long _num __asm__ ("r6") = (num); \
register long _arg1 __asm__ ("r0") = (long)(arg1); \
register long _arg2 __asm__ ("r1") = (long)(arg2); \
\
__asm__ volatile ( \
"trap0(#1)\n" \
: "+r"(_arg1) \
: "r"(_arg2), \
"r"(_num) \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
#define __nolibc_syscall3(num, arg1, arg2, arg3) \
({ \
register long _num __asm__ ("r6") = (num); \
register long _arg1 __asm__ ("r0") = (long)(arg1); \
register long _arg2 __asm__ ("r1") = (long)(arg2); \
register long _arg3 __asm__ ("r2") = (long)(arg3); \
\
__asm__ volatile ( \
"trap0(#1)\n" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), \
"r"(_num) \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
#define __nolibc_syscall4(num, arg1, arg2, arg3, arg4) \
({ \
register long _num __asm__ ("r6") = (num); \
register long _arg1 __asm__ ("r0") = (long)(arg1); \
register long _arg2 __asm__ ("r1") = (long)(arg2); \
register long _arg3 __asm__ ("r2") = (long)(arg3); \
register long _arg4 __asm__ ("r3") = (long)(arg4); \
\
__asm__ volatile ( \
"trap0(#1)\n" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), "r"(_arg4), \
"r"(_num) \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
#define __nolibc_syscall5(num, arg1, arg2, arg3, arg4, arg5) \
({ \
register long _num __asm__ ("r6") = (num); \
register long _arg1 __asm__ ("r0") = (long)(arg1); \
register long _arg2 __asm__ ("r1") = (long)(arg2); \
register long _arg3 __asm__ ("r2") = (long)(arg3); \
register long _arg4 __asm__ ("r3") = (long)(arg4); \
register long _arg5 __asm__ ("r4") = (long)(arg5); \
\
__asm__ volatile ( \
"trap0(#1)\n" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
"r"(_num) \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
#define __nolibc_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6) \
({ \
register long _num __asm__ ("r6") = (num); \
register long _arg1 __asm__ ("r0") = (long)(arg1); \
register long _arg2 __asm__ ("r1") = (long)(arg2); \
register long _arg3 __asm__ ("r2") = (long)(arg3); \
register long _arg4 __asm__ ("r3") = (long)(arg4); \
register long _arg5 __asm__ ("r4") = (long)(arg5); \
register long _arg6 __asm__ ("r5") = (long)(arg6); \
\
__asm__ volatile ( \
"trap0(#1)\n" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), "r"(_arg6), \
"r"(_num) \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
#ifndef NOLIBC_NO_RUNTIME
/* startup code */
void __attribute__((weak, noreturn))
__nolibc_entrypoint __nolibc_no_stack_protector
_start(void)
{
__asm__ volatile (
"r0 = sp\n" /* save stack pointer to r0, as arg1 of _start_c */
"call _start_c\n" /* transfer to c runtime */
);
__nolibc_entrypoint_epilogue();
}
#endif /* NOLIBC_NO_RUNTIME */
#define __NOLIBC_PAD_64BIT_SYSCALL_ARGUMENT_PAIR
#endif /* _NOLIBC_ARCH_HEXAGON_H */

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@ -72,6 +72,7 @@
#define _NOLIBC_SYSCALL_STACK_UNRESERVE
#define _NOLIBC_SYSCALL_REG register long long
#define __NOLIBC_BITS_PER_SYSCALL_ARG 64
#endif /* _ABIO32 */
@ -286,12 +287,7 @@ void __attribute__((weak, noreturn)) __nolibc_entrypoint __nolibc_no_stack_prote
#endif /* NOLIBC_NO_RUNTIME */
#if defined(_ABIO32)
static __attribute__((unused))
int _sys_ftruncate64(int fd, uint32_t length0, uint32_t length1)
{
return __nolibc_syscall4(__NR_ftruncate64, fd, 0, length0, length1);
}
#define _sys_ftruncate64 _sys_ftruncate64
#define __NOLIBC_PAD_64BIT_SYSCALL_ARGUMENT_PAIR
#endif
#endif /* _NOLIBC_ARCH_MIPS_H */

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@ -7,9 +7,7 @@
#ifndef _NOLIBC_ARCH_PARISC_H
#define _NOLIBC_ARCH_PARISC_H
#if defined(__LP64__)
#error 64-bit not supported
#endif
#include <linux/unistd.h>
#include "compiler.h"
#include "crt.h"
@ -167,9 +165,15 @@
void __attribute__((weak, noreturn)) __nolibc_entrypoint __nolibc_no_stack_protector _start(void)
{
__asm__ volatile (
#ifdef __LP64__
".import __gp\n" /* Set up the dp register */
"ldil L%__gp, %dp\n"
"ldo R%__gp(%dp), %dp\n"
#else
".import $global$\n" /* Set up the dp register */
"ldil L%$global$, %dp\n"
"ldo R%$global$(%r27), %dp\n"
"ldo R%$global$(%dp), %dp\n"
#endif
"b _start_c\n" /* Call _start_c, the load below is executed first */
@ -182,4 +186,20 @@ void __attribute__((weak, noreturn)) __nolibc_entrypoint __nolibc_no_stack_prote
}
#endif /* NOLIBC_NO_RUNTIME */
#ifdef __LP64__
/*
* This override is normally only meant for 32-bit architectures.
* But parisc 64-bit has __NR_ftruncate64, so this path is taken.
* Add an unused second argument to satisfy the calling convention.
*/
static __attribute__((unused))
int _sys_ftruncate64(int fd, uint64_t length, uint64_t unused)
{
(void)unused;
return __nolibc_syscall2(__NR_ftruncate64, fd, length);
}
#define _sys_ftruncate64 _sys_ftruncate64
#endif
#endif /* _NOLIBC_ARCH_PARISC_H */

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@ -222,12 +222,7 @@ void __attribute__((weak, noreturn)) __nolibc_entrypoint __nolibc_no_stack_prote
#endif /* NOLIBC_NO_RUNTIME */
#if !defined(__powerpc64__)
static __attribute__((unused))
int _sys_ftruncate64(int fd, uint32_t length0, uint32_t length1)
{
return __nolibc_syscall4(__NR_ftruncate64, fd, 0, length0, length1);
}
#define _sys_ftruncate64 _sys_ftruncate64
#define __NOLIBC_PAD_64BIT_SYSCALL_ARGUMENT_PAIR
#endif
#endif /* _NOLIBC_ARCH_POWERPC_H */

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@ -10,6 +10,8 @@
#include "compiler.h"
#include "crt.h"
#include <linux/unistd.h>
/*
* Syscalls for SuperH:
* - registers are 32bit wide
@ -161,4 +163,20 @@ void __attribute__((weak, noreturn)) __nolibc_entrypoint __nolibc_no_stack_prote
}
#endif /* NOLIBC_NO_RUNTIME */
static __attribute__((unused))
ssize_t _sys_pread(int fd, void *buf, size_t count, off_t offset)
{
return __nolibc_syscall6(__NR_pread64, fd, buf, count, 0,
__NOLIBC_LLARGPART(offset, 0), __NOLIBC_LLARGPART(offset, 1));
}
#define _sys_pread _sys_pread
static __attribute__((unused))
ssize_t _sys_pwrite(int fd, const void *buf, size_t count, off_t offset)
{
return __nolibc_syscall6(__NR_pwrite64, fd, buf, count, 0,
__NOLIBC_LLARGPART(offset, 0), __NOLIBC_LLARGPART(offset, 1));
}
#define _sys_pwrite _sys_pwrite
#endif /* _NOLIBC_ARCH_SH_H */

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@ -386,5 +386,7 @@ __asm__ (
".popsection\n"
);
#define __NOLIBC_BITS_PER_SYSCALL_ARG 64
#endif /* !defined(__x86_64__) */
#endif /* _NOLIBC_ARCH_X86_H */

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@ -34,8 +34,15 @@
#include "arch-parisc.h"
#elif defined(__alpha__)
#include "arch-alpha.h"
#elif defined(__hexagon__)
#include "arch-hexagon.h"
#else
#error Unsupported Architecture
#endif
#ifndef __NOLIBC_BITS_PER_SYSCALL_ARG
#define __NOLIBC_BITS_PER_SYSCALL_ARG __BITS_PER_LONG
#endif
#endif /* _NOLIBC_ARCH_H */

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@ -90,4 +90,13 @@
# define __nolibc_no_sanitize_undefined
#endif
/*
* Helper for 32-bit machines where a 64-bit syscall arg needs to be split into
* two 32-bit parts while making sure the order of the low/high parts are correct
* for the endianness:
* __NOLIBC_LLARGPART(x, 0), __NOLIBC_LLARGPART(x, 1)
*/
#define __NOLIBC_LLARGPART(_arg, _part) \
(((union { long long ll; long l[2]; }) { .ll = _arg }).l[_part])
#endif /* _NOLIBC_COMPILER_H */

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@ -30,10 +30,23 @@ typedef struct {
static __attribute__((unused))
DIR *fdopendir(int fd)
{
struct stat buf;
int ret;
if (fd < 0) {
SET_ERRNO(EBADF);
return NULL;
}
ret = fstat(fd, &buf);
if (ret < 0)
return NULL;
if (!S_ISDIR(buf.st_mode)) {
SET_ERRNO(ENOTDIR);
return NULL;
}
return (DIR *)(intptr_t)~fd;
}
@ -42,10 +55,11 @@ DIR *opendir(const char *name)
{
int fd;
fd = open(name, O_RDONLY);
fd = open(name, O_RDONLY | O_DIRECTORY);
if (fd == -1)
return NULL;
return fdopendir(fd);
return (DIR *)(intptr_t)~fd;
}
static __attribute__((unused))
@ -67,6 +81,7 @@ int readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result)
struct linux_dirent64 *ldir = (void *)buf;
intptr_t i = (intptr_t)dirp;
int fd, ret;
off_t off;
if (i >= 0)
return EBADF;
@ -86,9 +101,9 @@ int readdir_r(DIR *dirp, struct dirent *entry, struct dirent **result)
* readdir() can only return one entry at a time.
* Make sure the non-returned ones are not skipped.
*/
ret = _sys_lseek(fd, ldir->d_off, SEEK_SET);
if (ret < 0)
return -ret;
off = _sys_lseek(fd, ldir->d_off, SEEK_SET);
if (off < 0)
return -off;
entry->d_ino = ldir->d_ino;
/* the destination should always be big enough */

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@ -60,7 +60,7 @@ void verr(int eval, const char *fmt, va_list args)
static __attribute__((noreturn, unused))
void verrx(int eval, const char *fmt, va_list args)
{
warnx(fmt, args);
vwarnx(fmt, args);
exit(eval);
}

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@ -106,6 +106,7 @@
#include "sys/reboot.h"
#include "sys/resource.h"
#include "sys/select.h"
#include "sys/sendfile.h"
#include "sys/stat.h"
#include "sys/syscall.h"
#include "sys/sysmacros.h"

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@ -130,9 +130,11 @@ void *malloc(size_t len)
{
struct nolibc_heap *heap;
/* Always allocate memory with size multiple of 4096. */
len = sizeof(*heap) + len;
len = (len + 4095UL) & -4096UL;
if (__builtin_expect(__builtin_add_overflow(len, sizeof(*heap), &len), 0)) {
SET_ERRNO(ENOMEM);
return NULL;
}
heap = mmap(NULL, len, PROT_READ|PROT_WRITE, MAP_ANONYMOUS|MAP_PRIVATE,
-1, 0);
if (__builtin_expect(heap == MAP_FAILED, 0))
@ -143,7 +145,7 @@ void *malloc(size_t len)
}
static __attribute__((unused))
void *calloc(size_t size, size_t nmemb)
void *calloc(size_t nmemb, size_t size)
{
size_t x;
@ -230,7 +232,7 @@ int _nolibc_u64toa_base(uint64_t in, char *buffer, unsigned int base, uint64_t r
/* Generate least significant digit first */
do {
#if defined(__SIZEOF_INT128__) && !defined(__mips__) && !defined(__sparc__)
#if defined(__SIZEOF_INT128__) && !defined(__mips__) && !defined(__sparc__) && !defined(__hppa__)
q = ((unsigned __int128)in * recip) >> 64;
#else
uint64_t p = (uint32_t)in * (recip >> 32);

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@ -71,16 +71,6 @@ static __inline__ int __nolibc_enosys(const char *syscall, ...)
#endif
/*
* Helper for 32-bit machines where a 64-bit syscall arg needs to be split into
* two 32-bit parts while making sure the order of the low/high parts are correct
* for the endianness:
* __NOLIBC_LLARGPART(x, 0), __NOLIBC_LLARGPART(x, 1)
*/
#define __NOLIBC_LLARGPART(_arg, _part) \
(((union { long long ll; long l[2]; }) { .ll = _arg }).l[_part])
/* Functions in this file only describe syscalls. They're declared static so
* that the compiler usually decides to inline them while still being allowed
* to pass a pointer to one of their instances. Each syscall exists in two
@ -755,6 +745,56 @@ int pivot_root(const char *new, const char *old)
}
/*
* ssize_t pread(int fd, void *buf, size_t count, off_t offset);
* ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset);
*/
#ifndef _sys_pread
static __attribute__((unused))
ssize_t _sys_pread(int fd, void *buf, size_t count, off_t offset)
{
#if __NOLIBC_BITS_PER_SYSCALL_ARG == 64
return __nolibc_syscall4(__NR_pread64, fd, buf, count, offset);
#elif defined(__NOLIBC_PAD_64BIT_SYSCALL_ARGUMENT_PAIR)
return __nolibc_syscall6(__NR_pread64, fd, buf, count, 0,
__NOLIBC_LLARGPART(offset, 0), __NOLIBC_LLARGPART(offset, 1));
#else
return __nolibc_syscall5(__NR_pread64, fd, buf, count,
__NOLIBC_LLARGPART(offset, 0), __NOLIBC_LLARGPART(offset, 1));
#endif
}
#endif /* _sys_pread */
static __attribute__((unused))
ssize_t pread(int fd, void *buf, size_t count, off_t offset)
{
return __sysret(_sys_pread(fd, buf, count, offset));
}
#ifndef _sys_pwrite
static __attribute__((unused))
ssize_t _sys_pwrite(int fd, const void *buf, size_t count, off_t offset)
{
#if __NOLIBC_BITS_PER_SYSCALL_ARG == 64
return __nolibc_syscall4(__NR_pwrite64, fd, buf, count, offset);
#elif defined(__NOLIBC_PAD_64BIT_SYSCALL_ARGUMENT_PAIR)
return __nolibc_syscall6(__NR_pwrite64, fd, buf, count, 0,
__NOLIBC_LLARGPART(offset, 0), __NOLIBC_LLARGPART(offset, 1));
#else
return __nolibc_syscall5(__NR_pwrite64, fd, buf, count,
__NOLIBC_LLARGPART(offset, 0), __NOLIBC_LLARGPART(offset, 1));
#endif
}
#endif /* _sys_pwrite */
static __attribute__((unused))
ssize_t pwrite(int fd, const void *buf, size_t count, off_t offset)
{
return __sysret(_sys_pwrite(fd, buf, count, offset));
}
/*
* ssize_t read(int fd, void *buf, size_t count);
*/

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@ -26,7 +26,7 @@ typedef struct {
int __fd = (fd); \
if (__fd >= 0) \
__set->fds[__fd / FD_SETIDXMASK] &= \
~(1U << (__fd & FD_SETBITMASK)); \
~(1UL << (__fd & FD_SETBITMASK)); \
} while (0)
#define FD_SET(fd, set) do { \
@ -34,7 +34,7 @@ typedef struct {
int __fd = (fd); \
if (__fd >= 0) \
__set->fds[__fd / FD_SETIDXMASK] |= \
1 << (__fd & FD_SETBITMASK); \
1UL << (__fd & FD_SETBITMASK); \
} while (0)
#define FD_ISSET(fd, set) ({ \
@ -43,7 +43,7 @@ typedef struct {
int __r = 0; \
if (__fd >= 0) \
__r = !!(__set->fds[__fd / FD_SETIDXMASK] & \
1U << (__fd & FD_SETBITMASK)); \
1UL << (__fd & FD_SETBITMASK)); \
__r; \
})

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@ -0,0 +1,41 @@
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
/*
* sendfile for NOLIBC
* Copyright (C) 2026 Daniel Palmer <daniel@thingy.jp>
*/
/* make sure to include all global symbols */
#include "../nolibc.h"
#ifndef _NOLIBC_SYS_SENDFILE_H
#define _NOLIBC_SYS_SENDFILE_H
#include "../sys.h"
#include <linux/unistd.h>
/*
* ssize_t sendfile(int out_fd, int in_fd, off_t *offset, size_t count);
*/
static __attribute__((unused))
ssize_t _sys_sendfile(int out_fd, int in_fd, off_t *offset, size_t count)
{
__nolibc_static_assert(sizeof(*offset) == sizeof(__kernel_loff_t));
#ifdef __NR_sendfile64
/* 32-bit applications use sendfile64 so offset is treated as a __kernel_loff_t */
return __nolibc_syscall4(__NR_sendfile64, out_fd, in_fd, offset, count);
#else
__nolibc_static_assert(sizeof(*offset) == sizeof(__kernel_off_t));
return __nolibc_syscall4(__NR_sendfile, out_fd, in_fd, offset, count);
#endif
}
static __attribute__((unused))
ssize_t sendfile(int out_fd, int in_fd, off_t *offset, size_t count)
{
return __sysret(_sys_sendfile(out_fd, in_fd, offset, count));
}
#endif /* _NOLIBC_SYS_SENDFILE_H */

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@ -119,7 +119,7 @@ struct timeval {
#define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
#define WIFEXITED(status) (((status) & 0x7f) == 0)
#define WTERMSIG(status) ((status) & 0x7f)
#define WIFSIGNALED(status) ((status) - 1 < 0xff)
#define WIFSIGNALED(status) ((status) - 1U < 0xff)
/* standard exit() codes */
#define EXIT_SUCCESS 0

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@ -52,7 +52,11 @@ int access(const char *path, int amode)
static __attribute__((unused))
int _sys_ftruncate64(int fd, uint32_t length0, uint32_t length1)
{
#if defined(__NOLIBC_PAD_64BIT_SYSCALL_ARGUMENT_PAIR)
return __nolibc_syscall4(__NR_ftruncate64, fd, 0, length0, length1);
#else
return __nolibc_syscall3(__NR_ftruncate64, fd, length0, length1);
#endif
}
#define _sys_ftruncate64 _sys_ftruncate64
#endif

View File

@ -10,7 +10,7 @@ cc-option = $(call __cc-option, $(CC),,$(1),$(2))
include Makefile.include
$(OUTPUT)/nolibc-test: CFLAGS = -nostdlib -nostdinc -static \
-isystem $(top_srcdir)/tools/include/nolibc -isystem $(top_srcdir)/usr/include \
-isystem $(top_srcdir)/tools/include/nolibc $(KHDR_INCLUDES) \
$(CFLAGS_NOLIBC_TEST)
$(OUTPUT)/nolibc-test: LDLIBS = $(if $(LLVM),,-lgcc)
$(OUTPUT)/nolibc-test: $(NOLIBC_TEST_SOURCES) | headers

View File

@ -8,6 +8,7 @@ _CFLAGS_SANITIZER ?= $(call cc-option,-fsanitize=undefined -fsanitize-trap=all)
CFLAGS_NOLIBC_TEST ?= -Os -fno-ident -fno-asynchronous-unwind-tables -std=c89 -ggdb \
-W -Wall -Wextra -Wundef -Wwrite-strings \
$(call cc-option,-fno-stack-protector) $(call cc-option,-Wmissing-prototypes) \
$(call cc-option,--start-no-unused-arguments) -no-pie $(call cc-option,--end-no-unused-arguments) \
$(_CFLAGS_STACKPROTECTOR) $(_CFLAGS_SANITIZER)
NOLIBC_TEST_SOURCES := nolibc-test.c nolibc-test-linkage.c nolibc-test-ignore-errno.c

View File

@ -65,6 +65,7 @@ ARCH_sparc32 = sparc
ARCH_sparc64 = sparc
ARCH_sh4 = sh
ARCH_parisc32 = parisc
ARCH_parisc64 = parisc64
ARCH := $(or $(ARCH_$(XARCH)),$(XARCH))
# kernel image names by architecture
@ -113,6 +114,7 @@ EXTRACONFIG_sparc32 = -e CONFIG_TMPFS
EXTRACONFIG_m68k = -e CONFIG_BLK_DEV_INITRD
EXTRACONFIG_sh4 = -e CONFIG_BLK_DEV_INITRD -e CONFIG_CMDLINE_FROM_BOOTLOADER
EXTRACONFIG_alpha = -e CONFIG_BLK_DEV_INITRD
EXTRACONFIG_parisc64 = -d CONFIG_COMPAT
EXTRACONFIG = $(EXTRACONFIG_$(XARCH))
# optional tests to run (default = all)
@ -134,6 +136,7 @@ QEMU_ARCH_loongarch = loongarch64
QEMU_ARCH_sparc32 = sparc
QEMU_ARCH_openrisc = or1k
QEMU_ARCH_parisc32 = hppa
QEMU_ARCH_parisc64 = hppa
QEMU_ARCH = $(or $(QEMU_ARCH_$(XARCH)),$(XARCH))
QEMU_ARCH_USER_ppc64le = ppc64le
@ -175,6 +178,7 @@ QEMU_ARGS_m68k = -M virt -append "console=ttyGF0,115200 panic=-1 $(TEST:%=
QEMU_ARGS_sh4 = -M r2d -serial file:/dev/stdout -append "console=ttySC1,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_openrisc = -M virt -m 512M -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_parisc32 = -M B160L -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_parisc64 = -M C3700 -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_alpha = -M clipper -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS = -m 1G $(QEMU_ARGS_$(XARCH)) $(QEMU_ARGS_BIOS) $(QEMU_ARGS_EXTRA)
@ -193,6 +197,7 @@ CFLAGS_x32 = -mx32
CFLAGS_arm = -marm
CFLAGS_armthumb = -mthumb -march=armv6t2
CFLAGS_parisc32 = -mfast-indirect-calls
CFLAGS_parisc64 = -Wl,--no-dynamic-linker -Wl,--entry=_start -O2
CFLAGS_ppc = -m32 -mbig-endian -mno-vsx $(call cc-option,-mmultiple)
CFLAGS_ppc64 = -m64 -mbig-endian -mno-vsx $(call cc-option,-mmultiple)
CFLAGS_ppc64le = -m64 -mlittle-endian -mno-vsx $(call cc-option,-mabi=elfv2)
@ -206,6 +211,8 @@ CFLAGS_mips64be = -EB -mabi=64 -march=mips64r2
CFLAGS_loongarch = $(if $(LLVM),-fuse-ld=lld)
CFLAGS_sparc32 = $(call cc-option,-m32) -mcpu=v8
CFLAGS_sh4 = -ml -m4
# github.com/llvm/llvm-project/issues/216765
CFLAGS_hexagon = -fno-sanitize=undefined
ifeq ($(origin XARCH),command line)
CFLAGS_XARCH = $(CFLAGS_$(XARCH))
endif
@ -222,10 +229,16 @@ LDFLAGS :=
# Modify CFLAGS based on LLVM=
include $(srctree)/tools/scripts/Makefile.include
ifeq ($(ARCH),hexagon)
# tools/scripts/Makefile.include requires CROSS_COMPILE which does not exist for hexagon
CFLAGS += --target=hexagon-linux-musl
CLANG_CROSS_FLAGS += --target=hexagon-linux-musl
endif
REPORT ?= awk '/\[OK\][\r]*$$/{p++} /\[FAIL\][\r]*$$/{if (!f) printf("\n"); f++; print;} /\[SKIPPED\][\r]*$$/{s++} \
/^Total number of errors:/{done++} \
END{ printf("\n%3d test(s): %3d passed, %3d skipped, %3d failed => status: ", p+s+f, p, s, f); \
if (f || !p || !done) printf("failure\n"); else if (s) printf("warning\n"); else printf("success\n");; \
if (f || !p || !done) printf("failure\n"); else printf("success\n");; \
printf("\nSee all results in %s\n", ARGV[1]); }'
# Execute the toplevel kernel Makefile

View File

@ -22,6 +22,7 @@
#include <sys/random.h>
#include <sys/reboot.h>
#include <sys/resource.h>
#include <sys/sendfile.h>
#include <sys/stat.h>
#include <sys/syscall.h>
#include <sys/sysmacros.h>
@ -1368,6 +1369,51 @@ int test_pipe(void)
return !!memcmp(buf, msg, len);
}
int test_pwrite_pread(void)
{
const off_t offset = (0x12ULL << 32) | 0x34;
ssize_t ret;
char buf[2];
int fd, err;
off_t offs;
fd = open("/tmp", O_TMPFILE | O_RDWR, 0644);
if (fd == -1)
return __LINE__;
/* Write into the middle of the file. */
ret = pwrite(fd, "abc", 3, offset);
if (ret != 3) {
err = __LINE__;
goto out;
}
/* Make sure the file offset points somewhere else before pread(). */
offs = lseek(fd, 0, SEEK_END);
if (offs != offset + 3) {
err = __LINE__;
goto out;
}
ret = pread(fd, buf, 2, offset + 1);
if (ret != 2) {
err = __LINE__;
goto out;
}
if (buf[0] != 'b' || buf[1] != 'c') {
err = __LINE__;
goto out;
}
err = 0;
out:
close(fd);
return err;
}
int test_rlimit(void)
{
struct rlimit rlim = {
@ -1524,12 +1570,6 @@ int test_large_file(void)
ssize_t written;
off_t off;
#if defined(__mips__) && defined(_ABIN32)
/* https://lore.kernel.org/qemu-devel/fed03914-a95a-4522-a432-f129264cb2ac@t-8ch.de/ */
if (getpid() != 1)
return 0;
#endif
if (large_seek < UINT32_MAX) {
errno = EOVERFLOW;
return -1;
@ -1563,6 +1603,72 @@ int test_large_file(void)
return ret;
}
int test_sendfile(void)
{
char data_in[] = "This is some data";
const size_t data_sz = sizeof(data_in);
char data_out[data_sz + 10];
int in_fd, out_fd;
int ret;
/* Create two tmp files */
in_fd = open("/tmp", O_TMPFILE | O_RDWR, 0644);
out_fd = open("/tmp", O_TMPFILE | O_RDWR, 0644);
if (in_fd == -1 || out_fd == -1) {
ret = __LINE__;
goto out;
}
/* Populate the "in" file */
ret = write(in_fd, data_in, data_sz);
if (ret != data_sz) {
ret = __LINE__;
goto out;
}
/* Rewind the "in" file */
if (lseek(in_fd, 0, SEEK_SET)) {
ret = __LINE__;
goto out;
}
/* Use sendfile() to copy "in" to "out" */
ret = sendfile(out_fd, in_fd, NULL, data_sz + 5);
if (ret != data_sz) {
ret = __LINE__;
goto out;
}
/* Rewind the "out" file */
if (lseek(out_fd, 0, SEEK_SET)) {
ret = __LINE__;
goto out;
}
/* Read back the transferred data */
ret = read(out_fd, data_out, sizeof(data_out));
if (ret != data_sz) {
ret = __LINE__;
goto out;
}
/* Check we have the same data in both files */
if (memcmp(data_out, data_in, data_sz)) {
ret = __LINE__;
goto out;
}
/* Test passed */
ret = 0;
out:
close(out_fd);
close(in_fd);
return ret;
}
/* Run syscall tests between IDs <min> and <max>.
* Return 0 on success, non-zero on failure.
*/
@ -1584,6 +1690,7 @@ int run_syscall(int min, int max)
void *p1, *p2;
int has_gettid = 1;
int has_brk;
int has_working_64bit_syscall_arg = 1;
/* <proc> indicates whether or not /proc is mounted */
proc = stat("/proc", &stat_buf) == 0;
@ -1599,6 +1706,11 @@ int run_syscall(int min, int max)
/* on musl setting brk()/sbrk() always fails */
has_brk = brk(0) == 0;
#if defined(__mips__) && defined(_ABIN32)
/* https://lore.kernel.org/qemu-devel/fed03914-a95a-4522-a432-f129264cb2ac@t-8ch.de/ */
has_working_64bit_syscall_arg = getpid() == 1;
#endif
for (test = min; test >= 0 && test <= max; test++) {
int llen = 0; /* line length */
@ -1644,6 +1756,7 @@ int run_syscall(int min, int max)
CASE_TEST(execve_root); EXPECT_SYSER(1, execve("/", (char*[]){ [0] = (char []){"/"}, [1] = NULL }, NULL), -1, EACCES); break;
CASE_TEST(fchdir_stdin); EXPECT_SYSER(1, fchdir(STDIN_FILENO), -1, ENOTDIR); break;
CASE_TEST(fchdir_badfd); EXPECT_SYSER(1, fchdir(-1), -1, EBADF); break;
CASE_TEST(fdopendir_notdir); EXPECT_SYSER(1, (uintptr_t)fdopendir(STDIN_FILENO), (uintptr_t)NULL, ENOTDIR); break;
CASE_TEST(file_stream); EXPECT_SYSZR(1, test_file_stream()); break;
CASE_TEST(file_stream_wsr); EXPECT_SYSZR(1, test_file_stream_wsr()); break;
CASE_TEST(fork); EXPECT_SYSZR(1, test_fork(FORK_STANDARD)); break;
@ -1672,11 +1785,13 @@ int run_syscall(int min, int max)
CASE_TEST(open_blah); EXPECT_SYSER(1, tmp = open("/proc/self/blah", O_RDONLY), -1, ENOENT); if (tmp != -1) close(tmp); break;
CASE_TEST(openat_dir); EXPECT_SYSZR(1, test_openat()); break;
CASE_TEST(open_mode); EXPECT_SYSZR(1, test_open_mode()); break;
CASE_TEST(opendir_notdir); EXPECT_SYSER(1, (uintptr_t)opendir("/dev/null"), (uintptr_t)NULL, ENOTDIR); break;
CASE_TEST(pipe); EXPECT_SYSZR(1, test_pipe()); break;
CASE_TEST(poll_null); EXPECT_SYSZR(1, poll(NULL, 0, 0)); break;
CASE_TEST(poll_stdout); EXPECT_SYSNE(1, ({ struct pollfd fds = { 1, POLLOUT, 0}; poll(&fds, 1, 0); }), -1); break;
CASE_TEST(poll_fault); EXPECT_SYSER(1, poll(NULL, 1, 0), -1, EFAULT); break;
CASE_TEST(prctl); EXPECT_SYSER(1, prctl(PR_SET_NAME, (unsigned long)NULL, 0, 0, 0), -1, EFAULT); break;
CASE_TEST(pwrite_pread); EXPECT_SYSZR(has_working_64bit_syscall_arg, test_pwrite_pread()); break;
CASE_TEST(read_badf); EXPECT_SYSER(1, read(-1, &tmp, 1), -1, EBADF); break;
CASE_TEST(rlimit); EXPECT_SYSZR(1, test_rlimit()); break;
CASE_TEST(rmdir_blah); EXPECT_SYSER(1, rmdir("/blah"), -1, ENOENT); break;
@ -1684,6 +1799,7 @@ int run_syscall(int min, int max)
CASE_TEST(select_null); EXPECT_SYSZR(1, ({ struct timeval tv = { 0 }; select(0, NULL, NULL, NULL, &tv); })); break;
CASE_TEST(select_stdout); EXPECT_SYSNE(1, ({ fd_set fds; FD_ZERO(&fds); FD_SET(1, &fds); select(2, NULL, &fds, NULL, NULL); }), -1); break;
CASE_TEST(select_fault); EXPECT_SYSER(1, select(1, (void *)1, NULL, NULL, 0), -1, EFAULT); break;
CASE_TEST(sendfile); EXPECT_SYSZR(1, test_sendfile()); break;
CASE_TEST(stat_blah); EXPECT_SYSER(1, stat("/proc/self/blah", &stat_buf), -1, ENOENT); break;
CASE_TEST(stat_fault); EXPECT_SYSER(1, stat(NULL, &stat_buf), -1, EFAULT); break;
CASE_TEST(stat_rdev); EXPECT_SYSZR(1, ({ int ret = stat("/dev/null", &stat_buf); ret ?: stat_buf.st_rdev != makedev(1, 3); })); break;
@ -1711,7 +1827,7 @@ int run_syscall(int min, int max)
CASE_TEST(_syscall_noargs); EXPECT_SYSEQ(is_nolibc, _syscall(__NR_getpid), getpid()); break;
CASE_TEST(_syscall_args); EXPECT_SYSEQ(is_nolibc, _syscall(__NR_statx, 0, NULL, 0, 0, NULL), -EFAULT); break;
CASE_TEST(namespace); EXPECT_SYSZR(euid0 && proc, test_namespace()); break;
CASE_TEST(largefile); EXPECT_SYSZR(1, test_large_file()); break;
CASE_TEST(largefile); EXPECT_SYSZR(has_working_64bit_syscall_arg, test_large_file()); break;
case __LINE__:
return ret; /* must be last */
/* note: do not set any defaults so as to permit holes above */
@ -1771,6 +1887,26 @@ int test_time_types(void)
return 0;
}
int test_fd_set(void)
{
fd_set set, clr;
int fd, i;
/* FD_SET() and FD_CLR() must change exactly one fd */
for (fd = 0; fd < FD_SETSIZE; fd++) {
FD_ZERO(&set);
FD_SET(fd, &set);
memset(&clr, 0xff, sizeof(clr));
FD_CLR(fd, &clr);
for (i = 0; i < FD_SETSIZE; i++)
if (!!FD_ISSET(i, &set) != (i == fd) ||
!!FD_ISSET(i, &clr) != (i != fd))
return 1;
}
return 0;
}
int test_malloc(void)
{
size_t sz_array1, sz_array2, sz_array3;
@ -1952,6 +2088,7 @@ int run_stdlib(int min, int max)
CASE_TEST(memchr_foobar6_o); EXPECT_STREQ(1, memchr("foobar", 'o', 6), "oobar"); break;
CASE_TEST(memchr_foobar3_b); EXPECT_STRZR(1, memchr("foobar", 'b', 3)); break;
CASE_TEST(time_types); EXPECT_ZR(is_nolibc, test_time_types()); break;
CASE_TEST(fd_set); EXPECT_ZR(1, test_fd_set()); break;
CASE_TEST(makedev); EXPECT_EQ(1, makedev(0x12, 0x34), 0x1234); break;
CASE_TEST(major); EXPECT_EQ(1, major(0x1234), 0x12); break;
CASE_TEST(minor); EXPECT_EQ(1, minor(0x1234), 0x34); break;
@ -1968,6 +2105,14 @@ int run_stdlib(int min, int max)
CASE_TEST(htole32); EXPECT_EQ(1, htole32(is_le ? 0x01234567 : 0x67452301), 0x01234567); break;
CASE_TEST(htobe64); EXPECT_EQ(1, htobe64(is_le ? 0x0123456789000000 : 0x8967452301), 0x8967452301); break;
CASE_TEST(htole64); EXPECT_EQ(1, htole64(is_le ? 0x0123456789 : 0x8967452301000000), 0x0123456789); break;
CASE_TEST(wexitstatus); EXPECT_EQ(1, WEXITSTATUS(0x1200), 0x12); break;
CASE_TEST(wifexited_exit0); EXPECT_EQ(1, WIFEXITED(0), 1); break;
CASE_TEST(wifexited_signal); EXPECT_EQ(1, WIFEXITED(SIGKILL), 0); break;
CASE_TEST(wifsignaled_exit0); EXPECT_EQ(1, WIFSIGNALED(0), 0); break;
CASE_TEST(wifsignaled_exit); EXPECT_EQ(1, WIFSIGNALED(0x1200), 0); break;
CASE_TEST(wifsignaled_signal); EXPECT_EQ(1, WIFSIGNALED(SIGKILL), 1); break;
CASE_TEST(wifsignaled_stopped); EXPECT_EQ(1, WIFSIGNALED((SIGSTOP << 8) | 0x7f), 0); break;
CASE_TEST(wtermsig_core); EXPECT_EQ(1, WTERMSIG(0x80 | SIGSEGV), SIGSEGV); break;
case __LINE__:
return ret; /* must be last */

View File

@ -29,8 +29,9 @@ all_archs=(
sparc32 sparc64
m68k
sh4
parisc32
parisc32 parisc64
alpha
hexagon
)
archs="${all_archs[@]}"
@ -121,6 +122,7 @@ crosstool_arch() {
sparc*) echo sparc64;;
x32*) echo x86_64;;
parisc32) echo hppa;;
parisc64) echo hppa64;;
*) echo "$1";;
esac
}
@ -132,6 +134,13 @@ crosstool_abi() {
esac
}
need_gcc() {
case "$1" in
hexagon);;
*) echo "1";;
esac
}
download_crosstool() {
arch="$(crosstool_arch "$1")"
abi="$(crosstool_abi "$1")"
@ -164,14 +173,18 @@ test_arch() {
arch=$1
ct_arch=$(crosstool_arch "$arch")
ct_abi=$(crosstool_abi "$1")
gcc="$(need_gcc "$1")"
cross_compile=
if [ ! -d "${download_location}gcc-${crosstool_version}-nolibc/${ct_arch}-${ct_abi}/bin/." ]; then
if [ -n "$gcc" ] && [ ! -d "${download_location}gcc-${crosstool_version}-nolibc/${ct_arch}-${ct_abi}/bin/." ]; then
echo "No toolchain found in ${download_location}gcc-${crosstool_version}-nolibc/${ct_arch}-${ct_abi}."
echo "Did you install the toolchains or set the correct arch ? Rerun with -h for help."
return 1
fi
cross_compile=$(realpath "${download_location}gcc-${crosstool_version}-nolibc/${ct_arch}-${ct_abi}/bin/${ct_arch}-${ct_abi}-")
if [ -n "$gcc" ]; then
cross_compile=$(realpath "${download_location}gcc-${crosstool_version}-nolibc/${ct_arch}-${ct_abi}/bin/${ct_arch}-${ct_abi}-")
fi
build_dir="${build_location}/${arch}"
if [ "$werror" -ne 0 ]; then
CFLAGS_EXTRA="$CFLAGS_EXTRA -Werror -Wl,--fatal-warnings"
@ -194,11 +207,18 @@ test_arch() {
exit 1
esac
printf '%-15s' "$arch:"
if [ "$arch" = "m68k" -o "$arch" = "sh4" -o "$arch" = "openrisc" -o "$arch" = "parisc32" -o "$arch" = "alpha" ] && [ "$llvm" = "1" ]; then
if [ "$llvm" = "1" ] && \
[ "$arch" = "m68k" -o "$arch" = "sh4" -o "$arch" = "openrisc" \
-o "$arch" == "parisc32" -o "$arch" == "parisc64" -o "$arch" = "alpha" \
]; then
echo "Unsupported configuration"
return
fi
if [ "$arch" = "x32" ] && [ "$test_mode" = "user" ]; then
if [ "$test_mode" = "user" ] && [ "$arch" = "x32" -o "$arch" = "parisc64" ]; then
echo "Unsupported configuration"
return
fi
if [ -z "$llvm" -o "$test_mode" = "system" ] && [ "$arch" = "hexagon" ]; then
echo "Unsupported configuration"
return
fi