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linux-kselftest-nolibc-6.6-rc1 

This nolibc update for Linux 6.6-rc1 consists of:
 
 Nolibc:
   - improved portability by removing build errors with -ENOSYS
   - added syscall6() on MIPS to support pselect6() and mmap()
   - added setvbuf(), rmdir(), pipe(), pipe2()
   - add support for ppc/ppc64
   - environ is no longer optional
   - fixed frame pointer issues at -O0
   - dropped sys_stat() in favor of sys_statx()
   - centralized _start_c() to remove lots of asm code
   - switched size_t to __SIZE_TYPE__
 
 Selftests:
   - improved status reporting (success/warning/failure counts,
     path to log file)
   - various code cleanups (indent, unused variables, ...)
   - more consistent test numbering
   - enabled compiler warnings
   - dropped unreliable chmod_net test
   - improved reliability (create /dev/zero & /tmp, rely less on /proc)
   - new tests (brk/sbrk/mmap/munmap)
   - improved compatibility with musl
   - new run-nolibc-test target to build and run natively
   - new run-libc-test target to build and run against native libc
   - made the cmdline parser more reliable against boolean arguments
   - dropped dependency on memfd for vfprintf() test
   - nolibc-test is no longer stripped
   - added support for extending ARCH via XARCH
 
 Other:
   - add Thomas as co-maintainer
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Merge tag 'linux-kselftest-nolibc-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull nolibc updates from Shuah Khan:
 "Nolibc:
   - improved portability by removing build errors with -ENOSYS
   - added syscall6() on MIPS to support pselect6() and mmap()
   - added setvbuf(), rmdir(), pipe(), pipe2()
   - add support for ppc/ppc64
   - environ is no longer optional
   - fixed frame pointer issues at -O0
   - dropped sys_stat() in favor of sys_statx()
   - centralized _start_c() to remove lots of asm code
   - switched size_t to __SIZE_TYPE__

  Selftests:
   - improved status reporting (success/warning/failure counts, path to
     log file)
   - various code cleanups (indent, unused variables, ...)
   - more consistent test numbering
   - enabled compiler warnings
   - dropped unreliable chmod_net test
   - improved reliability (create /dev/zero & /tmp, rely less on /proc)
   - new tests (brk/sbrk/mmap/munmap)
   - improved compatibility with musl
   - new run-nolibc-test target to build and run natively
   - new run-libc-test target to build and run against native libc
   - made the cmdline parser more reliable against boolean arguments
   - dropped dependency on memfd for vfprintf() test
   - nolibc-test is no longer stripped
   - added support for extending ARCH via XARCH

  Other:
   - add Thomas as co-maintainer"

* tag 'linux-kselftest-nolibc-6.6-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (103 commits)
  tools/nolibc: avoid undesired casts in the __sysret() macro
  tools/nolibc: keep brk(), sbrk(), mmap() away from __sysret()
  tools/nolibc: silence ppc64 compile warnings
  selftests/nolibc: libc-test: use HOSTCC instead of CC
  tools/nolibc: stackprotector.h: make __stack_chk_init static
  selftests/nolibc: allow report with existing test log
  selftests/nolibc: add test support for ppc64
  selftests/nolibc: add test support for ppc64le
  selftests/nolibc: add test support for ppc
  selftests/nolibc: add XARCH and ARCH mapping support
  tools/nolibc: add support for powerpc64
  tools/nolibc: add support for powerpc
  MAINTAINERS: nolibc: add myself as co-maintainer
  selftests/nolibc: enable compiler warnings
  selftests/nolibc: don't strip nolibc-test
  selftests/nolibc: prevent out of bounds access in expect_vfprintf
  selftests/nolibc: use correct return type for read() and write()
  selftests/nolibc: avoid sign-compare warnings
  selftests/nolibc: avoid unused parameter warnings
  selftests/nolibc: make functions static if possible
  ...
This commit is contained in:
Linus Torvalds 2023-08-28 19:03:24 -07:00
parent 815c24a085 556fb7131e
commit 1c59d38339
23 changed files with 1219 additions and 1164 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

1
MAINTAINERS
View File

@ -15010,6 +15010,7 @@ F: include/linux/power/bq27xxx_battery.h
NOLIBC HEADER FILE
M: Willy Tarreau <w@1wt.eu>
M: Thomas Weißschuh <linux@weissschuh.net>
S: Maintained
T: git git://git.kernel.org/pub/scm/linux/kernel/git/wtarreau/nolibc.git
F: tools/include/nolibc/

1
tools/include/nolibc/Makefile
View File

@ -27,6 +27,7 @@ nolibc_arch := $(patsubst arm64,aarch64,$(ARCH))
arch_file := arch-$(nolibc_arch).h
all_files := \
compiler.h \
crt.h \
ctype.h \
errno.h \
nolibc.h \

85
tools/include/nolibc/arch-aarch64.h
View File

@ -8,34 +8,7 @@
#define _NOLIBC_ARCH_AARCH64_H
#include "compiler.h"
/* The struct returned by the newfstatat() syscall. Differs slightly from the
* x86_64's stat one by field ordering, so be careful.
*/
struct sys_stat_struct {
unsigned long st_dev;
unsigned long st_ino;
unsigned int st_mode;
unsigned int st_nlink;
unsigned int st_uid;
unsigned int st_gid;
unsigned long st_rdev;
unsigned long __pad1;
long st_size;
int st_blksize;
int __pad2;
long st_blocks;
long st_atime;
unsigned long st_atime_nsec;
long st_mtime;
unsigned long st_mtime_nsec;
long st_ctime;
unsigned long st_ctime_nsec;
unsigned int __unused[2];
};
#include "crt.h"
/* Syscalls for AARCH64 :
* - registers are 64-bit
@ -56,8 +29,8 @@ struct sys_stat_struct {
({ \
register long _num __asm__ ("x8") = (num); \
register long _arg1 __asm__ ("x0"); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"svc #0\n" \
: "=r"(_arg1) \
: "r"(_num) \
@ -70,8 +43,8 @@ struct sys_stat_struct {
({ \
register long _num __asm__ ("x8") = (num); \
register long _arg1 __asm__ ("x0") = (long)(arg1); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"svc #0\n" \
: "=r"(_arg1) \
: "r"(_arg1), \
@ -86,8 +59,8 @@ struct sys_stat_struct {
register long _num __asm__ ("x8") = (num); \
register long _arg1 __asm__ ("x0") = (long)(arg1); \
register long _arg2 __asm__ ("x1") = (long)(arg2); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"svc #0\n" \
: "=r"(_arg1) \
: "r"(_arg1), "r"(_arg2), \
@ -103,8 +76,8 @@ struct sys_stat_struct {
register long _arg1 __asm__ ("x0") = (long)(arg1); \
register long _arg2 __asm__ ("x1") = (long)(arg2); \
register long _arg3 __asm__ ("x2") = (long)(arg3); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"svc #0\n" \
: "=r"(_arg1) \
: "r"(_arg1), "r"(_arg2), "r"(_arg3), \
@ -121,8 +94,8 @@ struct sys_stat_struct {
register long _arg2 __asm__ ("x1") = (long)(arg2); \
register long _arg3 __asm__ ("x2") = (long)(arg3); \
register long _arg4 __asm__ ("x3") = (long)(arg4); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"svc #0\n" \
: "=r"(_arg1) \
: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), \
@ -140,8 +113,8 @@ struct sys_stat_struct {
register long _arg3 __asm__ ("x2") = (long)(arg3); \
register long _arg4 __asm__ ("x3") = (long)(arg4); \
register long _arg5 __asm__ ("x4") = (long)(arg5); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"svc #0\n" \
: "=r" (_arg1) \
: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
@ -160,8 +133,8 @@ struct sys_stat_struct {
register long _arg4 __asm__ ("x3") = (long)(arg4); \
register long _arg5 __asm__ ("x4") = (long)(arg5); \
register long _arg6 __asm__ ("x5") = (long)(arg6); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"svc #0\n" \
: "=r" (_arg1) \
: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
@ -171,33 +144,13 @@ struct sys_stat_struct {
_arg1; \
})
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
/* startup code */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)
void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_stack_protector _start(void)
{
__asm__ volatile (
#ifdef _NOLIBC_STACKPROTECTOR
"bl __stack_chk_init\n" /* initialize stack protector */
#endif
"ldr x0, [sp]\n" /* argc (x0) was in the stack */
"add x1, sp, 8\n" /* argv (x1) = sp */
"lsl x2, x0, 3\n" /* envp (x2) = 8*argc ... */
"add x2, x2, 8\n" /* + 8 (skip null) */
"add x2, x2, x1\n" /* + argv */
"adrp x3, environ\n" /* x3 = &environ (high bits) */
"str x2, [x3, #:lo12:environ]\n" /* store envp into environ */
"mov x4, x2\n" /* search for auxv (follows NULL after last env) */
"0:\n"
"ldr x5, [x4], 8\n" /* x5 = *x4; x4 += 8 */
"cbnz x5, 0b\n" /* and stop at NULL after last env */
"adrp x3, _auxv\n" /* x3 = &_auxv (high bits) */
"str x4, [x3, #:lo12:_auxv]\n" /* store x4 into _auxv */
"and sp, x1, -16\n" /* sp must be 16-byte aligned in the callee */
"bl main\n" /* main() returns the status code, we'll exit with it. */
"mov x8, 93\n" /* NR_exit == 93 */
"svc #0\n"
"mov x0, sp\n" /* save stack pointer to x0, as arg1 of _start_c */
"and sp, x0, -16\n" /* sp must be 16-byte aligned in the callee */
"bl _start_c\n" /* transfer to c runtime */
);
__builtin_unreachable();
}

111
tools/include/nolibc/arch-arm.h
View File

@ -8,43 +8,7 @@
#define _NOLIBC_ARCH_ARM_H
#include "compiler.h"
/* The struct returned by the stat() syscall, 32-bit only, the syscall returns
* exactly 56 bytes (stops before the unused array). In big endian, the format
* differs as devices are returned as short only.
*/
struct sys_stat_struct {
#if defined(__ARMEB__)
unsigned short st_dev;
unsigned short __pad1;
#else
unsigned long st_dev;
#endif
unsigned long st_ino;
unsigned short st_mode;
unsigned short st_nlink;
unsigned short st_uid;
unsigned short st_gid;
#if defined(__ARMEB__)
unsigned short st_rdev;
unsigned short __pad2;
#else
unsigned long st_rdev;
#endif
unsigned long st_size;
unsigned long st_blksize;
unsigned long st_blocks;
unsigned long st_atime;
unsigned long st_atime_nsec;
unsigned long st_mtime;
unsigned long st_mtime_nsec;
unsigned long st_ctime;
unsigned long st_ctime_nsec;
unsigned long __unused[2];
};
#include "crt.h"
/* Syscalls for ARM in ARM or Thumb modes :
* - registers are 32-bit
@ -90,8 +54,8 @@ struct sys_stat_struct {
({ \
register long _num __asm__(_NOLIBC_SYSCALL_REG) = (num); \
register long _arg1 __asm__ ("r0"); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
_NOLIBC_THUMB_SET_R7 \
"svc #0\n" \
_NOLIBC_THUMB_RESTORE_R7 \
@ -107,8 +71,8 @@ struct sys_stat_struct {
({ \
register long _num __asm__(_NOLIBC_SYSCALL_REG) = (num); \
register long _arg1 __asm__ ("r0") = (long)(arg1); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
_NOLIBC_THUMB_SET_R7 \
"svc #0\n" \
_NOLIBC_THUMB_RESTORE_R7 \
@ -125,8 +89,8 @@ struct sys_stat_struct {
register long _num __asm__(_NOLIBC_SYSCALL_REG) = (num); \
register long _arg1 __asm__ ("r0") = (long)(arg1); \
register long _arg2 __asm__ ("r1") = (long)(arg2); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
_NOLIBC_THUMB_SET_R7 \
"svc #0\n" \
_NOLIBC_THUMB_RESTORE_R7 \
@ -144,8 +108,8 @@ struct sys_stat_struct {
register long _arg1 __asm__ ("r0") = (long)(arg1); \
register long _arg2 __asm__ ("r1") = (long)(arg2); \
register long _arg3 __asm__ ("r2") = (long)(arg3); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
_NOLIBC_THUMB_SET_R7 \
"svc #0\n" \
_NOLIBC_THUMB_RESTORE_R7 \
@ -164,8 +128,8 @@ struct sys_stat_struct {
register long _arg2 __asm__ ("r1") = (long)(arg2); \
register long _arg3 __asm__ ("r2") = (long)(arg3); \
register long _arg4 __asm__ ("r3") = (long)(arg4); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
_NOLIBC_THUMB_SET_R7 \
"svc #0\n" \
_NOLIBC_THUMB_RESTORE_R7 \
@ -185,8 +149,8 @@ struct sys_stat_struct {
register long _arg3 __asm__ ("r2") = (long)(arg3); \
register long _arg4 __asm__ ("r3") = (long)(arg4); \
register long _arg5 __asm__ ("r4") = (long)(arg5); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
_NOLIBC_THUMB_SET_R7 \
"svc #0\n" \
_NOLIBC_THUMB_RESTORE_R7 \
@ -207,8 +171,8 @@ struct sys_stat_struct {
register long _arg4 __asm__ ("r3") = (long)(arg4); \
register long _arg5 __asm__ ("r4") = (long)(arg5); \
register long _arg6 __asm__ ("r5") = (long)(arg6); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
_NOLIBC_THUMB_SET_R7 \
"svc #0\n" \
_NOLIBC_THUMB_RESTORE_R7 \
@ -220,49 +184,14 @@ struct sys_stat_struct {
_arg1; \
})
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
/* startup code */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)
void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_stack_protector _start(void)
{
__asm__ volatile (
#ifdef _NOLIBC_STACKPROTECTOR
"bl __stack_chk_init\n" /* initialize stack protector */
#endif
"pop {%r0}\n" /* argc was in the stack */
"mov %r1, %sp\n" /* argv = sp */
"add %r2, %r0, $1\n" /* envp = (argc + 1) ... */
"lsl %r2, %r2, $2\n" /* * 4 ... */
"add %r2, %r2, %r1\n" /* + argv */
"ldr %r3, 1f\n" /* r3 = &environ (see below) */
"str %r2, [r3]\n" /* store envp into environ */
"mov r4, r2\n" /* search for auxv (follows NULL after last env) */
"0:\n"
"mov r5, r4\n" /* r5 = r4 */
"add r4, r4, #4\n" /* r4 += 4 */
"ldr r5,[r5]\n" /* r5 = *r5 = *(r4-4) */
"cmp r5, #0\n" /* and stop at NULL after last env */
"bne 0b\n"
"ldr %r3, 2f\n" /* r3 = &_auxv (low bits) */
"str r4, [r3]\n" /* store r4 into _auxv */
"mov %r3, $8\n" /* AAPCS : sp must be 8-byte aligned in the */
"neg %r3, %r3\n" /* callee, and bl doesn't push (lr=pc) */
"and %r3, %r3, %r1\n" /* so we do sp = r1(=sp) & r3(=-8); */
"mov %sp, %r3\n"
"bl main\n" /* main() returns the status code, we'll exit with it. */
"movs r7, $1\n" /* NR_exit == 1 */
"svc $0x00\n"
".align 2\n" /* below are the pointers to a few variables */
"1:\n"
".word environ\n"
"2:\n"
".word _auxv\n"
"mov %r0, sp\n" /* save stack pointer to %r0, as arg1 of _start_c */
"and ip, %r0, #-8\n" /* sp must be 8-byte aligned in the callee */
"mov sp, ip\n"
"bl _start_c\n" /* transfer to c runtime */
);
__builtin_unreachable();
}

86
tools/include/nolibc/arch-i386.h
View File

@ -8,32 +8,7 @@
#define _NOLIBC_ARCH_I386_H
#include "compiler.h"
/* The struct returned by the stat() syscall, 32-bit only, the syscall returns
* exactly 56 bytes (stops before the unused array).
*/
struct sys_stat_struct {
unsigned long st_dev;
unsigned long st_ino;
unsigned short st_mode;
unsigned short st_nlink;
unsigned short st_uid;
unsigned short st_gid;
unsigned long st_rdev;
unsigned long st_size;
unsigned long st_blksize;
unsigned long st_blocks;
unsigned long st_atime;
unsigned long st_atime_nsec;
unsigned long st_mtime;
unsigned long st_mtime_nsec;
unsigned long st_ctime;
unsigned long st_ctime_nsec;
unsigned long __unused[2];
};
#include "crt.h"
/* Syscalls for i386 :
* - mostly similar to x86_64
@ -57,8 +32,8 @@ struct sys_stat_struct {
({ \
long _ret; \
register long _num __asm__ ("eax") = (num); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"int $0x80\n" \
: "=a" (_ret) \
: "0"(_num) \
@ -72,8 +47,8 @@ struct sys_stat_struct {
long _ret; \
register long _num __asm__ ("eax") = (num); \
register long _arg1 __asm__ ("ebx") = (long)(arg1); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"int $0x80\n" \
: "=a" (_ret) \
: "r"(_arg1), \
@ -89,8 +64,8 @@ struct sys_stat_struct {
register long _num __asm__ ("eax") = (num); \
register long _arg1 __asm__ ("ebx") = (long)(arg1); \
register long _arg2 __asm__ ("ecx") = (long)(arg2); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"int $0x80\n" \
: "=a" (_ret) \
: "r"(_arg1), "r"(_arg2), \
@ -107,8 +82,8 @@ struct sys_stat_struct {
register long _arg1 __asm__ ("ebx") = (long)(arg1); \
register long _arg2 __asm__ ("ecx") = (long)(arg2); \
register long _arg3 __asm__ ("edx") = (long)(arg3); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"int $0x80\n" \
: "=a" (_ret) \
: "r"(_arg1), "r"(_arg2), "r"(_arg3), \
@ -126,8 +101,8 @@ struct sys_stat_struct {
register long _arg2 __asm__ ("ecx") = (long)(arg2); \
register long _arg3 __asm__ ("edx") = (long)(arg3); \
register long _arg4 __asm__ ("esi") = (long)(arg4); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"int $0x80\n" \
: "=a" (_ret) \
: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), \
@ -146,8 +121,8 @@ struct sys_stat_struct {
register long _arg3 __asm__ ("edx") = (long)(arg3); \
register long _arg4 __asm__ ("esi") = (long)(arg4); \
register long _arg5 __asm__ ("edi") = (long)(arg5); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"int $0x80\n" \
: "=a" (_ret) \
: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
@ -180,9 +155,6 @@ struct sys_stat_struct {
_eax; \
})
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
/* startup code */
/*
* i386 System V ABI mandates:
@ -190,33 +162,15 @@ const unsigned long *_auxv __attribute__((weak));
* 2) The deepest stack frame should be set to zero
*
*/
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)
void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_stack_protector _start(void)
{
__asm__ volatile (
#ifdef _NOLIBC_STACKPROTECTOR
"call __stack_chk_init\n" /* initialize stack protector */
#endif
"pop %eax\n" /* argc (first arg, %eax) */
"mov %esp, %ebx\n" /* argv[] (second arg, %ebx) */
"lea 4(%ebx,%eax,4),%ecx\n" /* then a NULL then envp (third arg, %ecx) */
"mov %ecx, environ\n" /* save environ */
"xor %ebp, %ebp\n" /* zero the stack frame */
"mov %ecx, %edx\n" /* search for auxv (follows NULL after last env) */
"0:\n"
"add $4, %edx\n" /* search for auxv using edx, it follows the */
"cmp -4(%edx), %ebp\n" /* ... NULL after last env (ebp is zero here) */
"jnz 0b\n"
"mov %edx, _auxv\n" /* save it into _auxv */
"and $-16, %esp\n" /* x86 ABI : esp must be 16-byte aligned before */
"sub $4, %esp\n" /* the call instruction (args are aligned) */
"push %ecx\n" /* push all registers on the stack so that we */
"push %ebx\n" /* support both regparm and plain stack modes */
"push %eax\n"
"call main\n" /* main() returns the status code in %eax */
"mov %eax, %ebx\n" /* retrieve exit code (32-bit int) */
"movl $1, %eax\n" /* NR_exit == 1 */
"int $0x80\n" /* exit now */
"hlt\n" /* ensure it does not */
"xor %ebp, %ebp\n" /* zero the stack frame */
"mov %esp, %eax\n" /* save stack pointer to %eax, as arg1 of _start_c */
"and $-16, %esp\n" /* last pushed argument must be 16-byte aligned */
"push %eax\n" /* push arg1 on stack to support plain stack modes too */
"call _start_c\n" /* transfer to c runtime */
"hlt\n" /* ensure it does not return */
);
__builtin_unreachable();
}

83
tools/include/nolibc/arch-loongarch.h
View File

@ -8,6 +8,7 @@
#define _NOLIBC_ARCH_LOONGARCH_H
#include "compiler.h"
#include "crt.h"
/* Syscalls for LoongArch :
* - stack is 16-byte aligned
@ -22,18 +23,19 @@
* On LoongArch, select() is not implemented so we have to use pselect6().
*/
#define __ARCH_WANT_SYS_PSELECT6
#define _NOLIBC_SYSCALL_CLOBBERLIST \
"memory", "$t0", "$t1", "$t2", "$t3", "$t4", "$t5", "$t6", "$t7", "$t8"
#define my_syscall0(num) \
({ \
register long _num __asm__ ("a7") = (num); \
register long _arg1 __asm__ ("a0"); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"syscall 0\n" \
: "=r"(_arg1) \
: "r"(_num) \
: "memory", "$t0", "$t1", "$t2", "$t3", \
"$t4", "$t5", "$t6", "$t7", "$t8" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
@ -43,12 +45,11 @@
register long _num __asm__ ("a7") = (num); \
register long _arg1 __asm__ ("a0") = (long)(arg1); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"syscall 0\n" \
: "+r"(_arg1) \
: "r"(_num) \
: "memory", "$t0", "$t1", "$t2", "$t3", \
"$t4", "$t5", "$t6", "$t7", "$t8" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
@ -59,13 +60,12 @@
register long _arg1 __asm__ ("a0") = (long)(arg1); \
register long _arg2 __asm__ ("a1") = (long)(arg2); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"syscall 0\n" \
: "+r"(_arg1) \
: "r"(_arg2), \
"r"(_num) \
: "memory", "$t0", "$t1", "$t2", "$t3", \
"$t4", "$t5", "$t6", "$t7", "$t8" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
@ -77,13 +77,12 @@
register long _arg2 __asm__ ("a1") = (long)(arg2); \
register long _arg3 __asm__ ("a2") = (long)(arg3); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"syscall 0\n" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), \
"r"(_num) \
: "memory", "$t0", "$t1", "$t2", "$t3", \
"$t4", "$t5", "$t6", "$t7", "$t8" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
@ -96,13 +95,12 @@
register long _arg3 __asm__ ("a2") = (long)(arg3); \
register long _arg4 __asm__ ("a3") = (long)(arg4); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"syscall 0\n" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), "r"(_arg4), \
"r"(_num) \
: "memory", "$t0", "$t1", "$t2", "$t3", \
"$t4", "$t5", "$t6", "$t7", "$t8" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
@ -116,13 +114,12 @@
register long _arg4 __asm__ ("a3") = (long)(arg4); \
register long _arg5 __asm__ ("a4") = (long)(arg5); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"syscall 0\n" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
"r"(_num) \
: "memory", "$t0", "$t1", "$t2", "$t3", \
"$t4", "$t5", "$t6", "$t7", "$t8" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
@ -137,67 +134,29 @@
register long _arg5 __asm__ ("a4") = (long)(arg5); \
register long _arg6 __asm__ ("a5") = (long)(arg6); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"syscall 0\n" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), "r"(_arg6), \
"r"(_num) \
: "memory", "$t0", "$t1", "$t2", "$t3", \
"$t4", "$t5", "$t6", "$t7", "$t8" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg1; \
})
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
#if __loongarch_grlen == 32
#define LONGLOG "2"
#define SZREG "4"
#define REG_L "ld.w"
#define LONG_S "st.w"
#define LONG_ADD "add.w"
#define LONG_ADDI "addi.w"
#define LONG_SLL "slli.w"
#define LONG_BSTRINS "bstrins.w"
#else /* __loongarch_grlen == 64 */
#define LONGLOG "3"
#define SZREG "8"
#define REG_L "ld.d"
#define LONG_S "st.d"
#define LONG_ADD "add.d"
#define LONG_ADDI "addi.d"
#define LONG_SLL "slli.d"
#define LONG_BSTRINS "bstrins.d"
#endif
/* startup code */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)
void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_stack_protector _start(void)
{
__asm__ volatile (
#ifdef _NOLIBC_STACKPROTECTOR
"bl __stack_chk_init\n" /* initialize stack protector */
#endif
REG_L " $a0, $sp, 0\n" /* argc (a0) was in the stack */
LONG_ADDI " $a1, $sp, "SZREG"\n" /* argv (a1) = sp + SZREG */
LONG_SLL " $a2, $a0, "LONGLOG"\n" /* envp (a2) = SZREG*argc ... */
LONG_ADDI " $a2, $a2, "SZREG"\n" /* + SZREG (skip null) */
LONG_ADD " $a2, $a2, $a1\n" /* + argv */
"move $a3, $a2\n" /* iterate a3 over envp to find auxv (after NULL) */
"0:\n" /* do { */
REG_L " $a4, $a3, 0\n" /* a4 = *a3; */
LONG_ADDI " $a3, $a3, "SZREG"\n" /* a3 += sizeof(void*); */
"bne $a4, $zero, 0b\n" /* } while (a4); */
"la.pcrel $a4, _auxv\n" /* a4 = &_auxv */
LONG_S " $a3, $a4, 0\n" /* store a3 into _auxv */
"la.pcrel $a3, environ\n" /* a3 = &environ */
LONG_S " $a2, $a3, 0\n" /* store envp(a2) into environ */
LONG_BSTRINS " $sp, $zero, 3, 0\n" /* sp must be 16-byte aligned */
"bl main\n" /* main() returns the status code, we'll exit with it. */
"li.w $a7, 93\n" /* NR_exit == 93 */
"syscall 0\n"
"move $a0, $sp\n" /* save stack pointer to $a0, as arg1 of _start_c */
LONG_BSTRINS " $sp, $zero, 3, 0\n" /* $sp must be 16-byte aligned */
"bl _start_c\n" /* transfer to c runtime */
);
__builtin_unreachable();
}

147
tools/include/nolibc/arch-mips.h
View File

@ -8,34 +8,7 @@
#define _NOLIBC_ARCH_MIPS_H
#include "compiler.h"
/* The struct returned by the stat() syscall. 88 bytes are returned by the
* syscall.
*/
struct sys_stat_struct {
unsigned int st_dev;
long st_pad1[3];
unsigned long st_ino;
unsigned int st_mode;
unsigned int st_nlink;
unsigned int st_uid;
unsigned int st_gid;
unsigned int st_rdev;
long st_pad2[2];
long st_size;
long st_pad3;
long st_atime;
long st_atime_nsec;
long st_mtime;
long st_mtime_nsec;
long st_ctime;
long st_ctime_nsec;
long st_blksize;
long st_blocks;
long st_pad4[14];
};
#include "crt.h"
/* Syscalls for MIPS ABI O32 :
* - WARNING! there's always a delayed slot!
@ -57,19 +30,22 @@ struct sys_stat_struct {
* don't have to experience issues with register constraints.
*/
#define _NOLIBC_SYSCALL_CLOBBERLIST \
"memory", "cc", "at", "v1", "hi", "lo", \
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9"
#define my_syscall0(num) \
({ \
register long _num __asm__ ("v0") = (num); \
register long _arg4 __asm__ ("a3"); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"addiu $sp, $sp, -32\n" \
"syscall\n" \
"addiu $sp, $sp, 32\n" \
: "=r"(_num), "=r"(_arg4) \
: "r"(_num) \
: "memory", "cc", "at", "v1", "hi", "lo", \
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg4 ? -_num : _num; \
})
@ -79,16 +55,15 @@ struct sys_stat_struct {
register long _num __asm__ ("v0") = (num); \
register long _arg1 __asm__ ("a0") = (long)(arg1); \
register long _arg4 __asm__ ("a3"); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"addiu $sp, $sp, -32\n" \
"syscall\n" \
"addiu $sp, $sp, 32\n" \
: "=r"(_num), "=r"(_arg4) \
: "0"(_num), \
"r"(_arg1) \
: "memory", "cc", "at", "v1", "hi", "lo", \
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg4 ? -_num : _num; \
})
@ -99,16 +74,15 @@ struct sys_stat_struct {
register long _arg1 __asm__ ("a0") = (long)(arg1); \
register long _arg2 __asm__ ("a1") = (long)(arg2); \
register long _arg4 __asm__ ("a3"); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"addiu $sp, $sp, -32\n" \
"syscall\n" \
"addiu $sp, $sp, 32\n" \
: "=r"(_num), "=r"(_arg4) \
: "0"(_num), \
"r"(_arg1), "r"(_arg2) \
: "memory", "cc", "at", "v1", "hi", "lo", \
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg4 ? -_num : _num; \
})
@ -120,16 +94,15 @@ struct sys_stat_struct {
register long _arg2 __asm__ ("a1") = (long)(arg2); \
register long _arg3 __asm__ ("a2") = (long)(arg3); \
register long _arg4 __asm__ ("a3"); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"addiu $sp, $sp, -32\n" \
"syscall\n" \
"addiu $sp, $sp, 32\n" \
: "=r"(_num), "=r"(_arg4) \
: "0"(_num), \
"r"(_arg1), "r"(_arg2), "r"(_arg3) \
: "memory", "cc", "at", "v1", "hi", "lo", \
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg4 ? -_num : _num; \
})
@ -141,16 +114,15 @@ struct sys_stat_struct {
register long _arg2 __asm__ ("a1") = (long)(arg2); \
register long _arg3 __asm__ ("a2") = (long)(arg3); \
register long _arg4 __asm__ ("a3") = (long)(arg4); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"addiu $sp, $sp, -32\n" \
"syscall\n" \
"addiu $sp, $sp, 32\n" \
: "=r" (_num), "=r"(_arg4) \
: "0"(_num), \
"r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4) \
: "memory", "cc", "at", "v1", "hi", "lo", \
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg4 ? -_num : _num; \
})
@ -163,65 +135,58 @@ struct sys_stat_struct {
register long _arg3 __asm__ ("a2") = (long)(arg3); \
register long _arg4 __asm__ ("a3") = (long)(arg4); \
register long _arg5 = (long)(arg5); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"addiu $sp, $sp, -32\n" \
"sw %7, 16($sp)\n" \
"syscall\n " \
"syscall\n" \
"addiu $sp, $sp, 32\n" \
: "=r" (_num), "=r"(_arg4) \
: "0"(_num), \
"r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5) \
: "memory", "cc", "at", "v1", "hi", "lo", \
"t0", "t1", "t2", "t3", "t4", "t5", "t6", "t7", "t8", "t9" \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg4 ? -_num : _num; \
})
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
#define my_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6) \
({ \
register long _num __asm__ ("v0") = (num); \
register long _arg1 __asm__ ("a0") = (long)(arg1); \
register long _arg2 __asm__ ("a1") = (long)(arg2); \
register long _arg3 __asm__ ("a2") = (long)(arg3); \
register long _arg4 __asm__ ("a3") = (long)(arg4); \
register long _arg5 = (long)(arg5); \
register long _arg6 = (long)(arg6); \
\
__asm__ volatile ( \
"addiu $sp, $sp, -32\n" \
"sw %7, 16($sp)\n" \
"sw %8, 20($sp)\n" \
"syscall\n" \
"addiu $sp, $sp, 32\n" \
: "=r" (_num), "=r"(_arg4) \
: "0"(_num), \
"r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
"r"(_arg6) \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_arg4 ? -_num : _num; \
})
/* startup code, note that it's called __start on MIPS */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector __start(void)
void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_stack_protector __start(void)
{
__asm__ volatile (
/*".set nomips16\n"*/
".set push\n"
".set noreorder\n"
".set noreorder\n"
".option pic0\n"
#ifdef _NOLIBC_STACKPROTECTOR
"jal __stack_chk_init\n" /* initialize stack protector */
"nop\n" /* delayed slot */
#endif
/*".ent __start\n"*/
/*"__start:\n"*/
"lw $a0,($sp)\n" /* argc was in the stack */
"addiu $a1, $sp, 4\n" /* argv = sp + 4 */
"sll $a2, $a0, 2\n" /* a2 = argc * 4 */
"add $a2, $a2, $a1\n" /* envp = argv + 4*argc ... */
"addiu $a2, $a2, 4\n" /* ... + 4 */
"lui $a3, %hi(environ)\n" /* load environ into a3 (hi) */
"addiu $a3, %lo(environ)\n" /* load environ into a3 (lo) */
"sw $a2,($a3)\n" /* store envp(a2) into environ */
"move $t0, $a2\n" /* iterate t0 over envp, look for NULL */
"0:" /* do { */
"lw $a3, ($t0)\n" /* a3=*(t0); */
"bne $a3, $0, 0b\n" /* } while (a3); */
"addiu $t0, $t0, 4\n" /* delayed slot: t0+=4; */
"lui $a3, %hi(_auxv)\n" /* load _auxv into a3 (hi) */
"addiu $a3, %lo(_auxv)\n" /* load _auxv into a3 (lo) */
"sw $t0, ($a3)\n" /* store t0 into _auxv */
"li $t0, -8\n"
"and $sp, $sp, $t0\n" /* sp must be 8-byte aligned */
"addiu $sp,$sp,-16\n" /* the callee expects to save a0..a3 there! */
"jal main\n" /* main() returns the status code, we'll exit with it. */
"nop\n" /* delayed slot */
"move $a0, $v0\n" /* retrieve 32-bit exit code from v0 */
"li $v0, 4001\n" /* NR_exit == 4001 */
"syscall\n"
/*".end __start\n"*/
"move $a0, $sp\n" /* save stack pointer to $a0, as arg1 of _start_c */
"li $t0, -8\n"
"and $sp, $sp, $t0\n" /* $sp must be 8-byte aligned */
"addiu $sp, $sp, -16\n" /* the callee expects to save a0..a3 there */
"jal _start_c\n" /* transfer to c runtime */
" nop\n" /* delayed slot */
".set pop\n"
);
__builtin_unreachable();

221
tools/include/nolibc/arch-powerpc.h Normal file
View File

@ -0,0 +1,221 @@
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
/*
* PowerPC specific definitions for NOLIBC
* Copyright (C) 2023 Zhangjin Wu <falcon@tinylab.org>
*/
#ifndef _NOLIBC_ARCH_POWERPC_H
#define _NOLIBC_ARCH_POWERPC_H
#include "compiler.h"
#include "crt.h"
/* Syscalls for PowerPC :
* - stack is 16-byte aligned
* - syscall number is passed in r0
* - arguments are in r3, r4, r5, r6, r7, r8, r9
* - the system call is performed by calling "sc"
* - syscall return comes in r3, and the summary overflow bit is checked
* to know if an error occurred, in which case errno is in r3.
* - the arguments are cast to long and assigned into the target
* registers which are then simply passed as registers to the asm code,
* so that we don't have to experience issues with register constraints.
*/
#define _NOLIBC_SYSCALL_CLOBBERLIST \
"memory", "cr0", "r12", "r11", "r10", "r9"
#define my_syscall0(num) \
({ \
register long _ret __asm__ ("r3"); \
register long _num __asm__ ("r0") = (num); \
\
__asm__ volatile ( \
" sc\n" \
" bns+ 1f\n" \
" neg %0, %0\n" \
"1:\n" \
: "=r"(_ret), "+r"(_num) \
: \
: _NOLIBC_SYSCALL_CLOBBERLIST, "r8", "r7", "r6", "r5", "r4" \
); \
_ret; \
})
#define my_syscall1(num, arg1) \
({ \
register long _ret __asm__ ("r3"); \
register long _num __asm__ ("r0") = (num); \
register long _arg1 __asm__ ("r3") = (long)(arg1); \
\
__asm__ volatile ( \
" sc\n" \
" bns+ 1f\n" \
" neg %0, %0\n" \
"1:\n" \
: "=r"(_ret), "+r"(_num) \
: "0"(_arg1) \
: _NOLIBC_SYSCALL_CLOBBERLIST, "r8", "r7", "r6", "r5", "r4" \
); \
_ret; \
})
#define my_syscall2(num, arg1, arg2) \
({ \
register long _ret __asm__ ("r3"); \
register long _num __asm__ ("r0") = (num); \
register long _arg1 __asm__ ("r3") = (long)(arg1); \
register long _arg2 __asm__ ("r4") = (long)(arg2); \
\
__asm__ volatile ( \
" sc\n" \
" bns+ 1f\n" \
" neg %0, %0\n" \
"1:\n" \
: "=r"(_ret), "+r"(_num), "+r"(_arg2) \
: "0"(_arg1) \
: _NOLIBC_SYSCALL_CLOBBERLIST, "r8", "r7", "r6", "r5" \
); \
_ret; \
})
#define my_syscall3(num, arg1, arg2, arg3) \
({ \
register long _ret __asm__ ("r3"); \
register long _num __asm__ ("r0") = (num); \
register long _arg1 __asm__ ("r3") = (long)(arg1); \
register long _arg2 __asm__ ("r4") = (long)(arg2); \
register long _arg3 __asm__ ("r5") = (long)(arg3); \
\
__asm__ volatile ( \
" sc\n" \
" bns+ 1f\n" \
" neg %0, %0\n" \
"1:\n" \
: "=r"(_ret), "+r"(_num), "+r"(_arg2), "+r"(_arg3) \
: "0"(_arg1) \
: _NOLIBC_SYSCALL_CLOBBERLIST, "r8", "r7", "r6" \
); \
_ret; \
})
#define my_syscall4(num, arg1, arg2, arg3, arg4) \
({ \
register long _ret __asm__ ("r3"); \
register long _num __asm__ ("r0") = (num); \
register long _arg1 __asm__ ("r3") = (long)(arg1); \
register long _arg2 __asm__ ("r4") = (long)(arg2); \
register long _arg3 __asm__ ("r5") = (long)(arg3); \
register long _arg4 __asm__ ("r6") = (long)(arg4); \
\
__asm__ volatile ( \
" sc\n" \
" bns+ 1f\n" \
" neg %0, %0\n" \
"1:\n" \
: "=r"(_ret), "+r"(_num), "+r"(_arg2), "+r"(_arg3), \
"+r"(_arg4) \
: "0"(_arg1) \
: _NOLIBC_SYSCALL_CLOBBERLIST, "r8", "r7" \
); \
_ret; \
})
#define my_syscall5(num, arg1, arg2, arg3, arg4, arg5) \
({ \
register long _ret __asm__ ("r3"); \
register long _num __asm__ ("r0") = (num); \
register long _arg1 __asm__ ("r3") = (long)(arg1); \
register long _arg2 __asm__ ("r4") = (long)(arg2); \
register long _arg3 __asm__ ("r5") = (long)(arg3); \
register long _arg4 __asm__ ("r6") = (long)(arg4); \
register long _arg5 __asm__ ("r7") = (long)(arg5); \
\
__asm__ volatile ( \
" sc\n" \
" bns+ 1f\n" \
" neg %0, %0\n" \
"1:\n" \
: "=r"(_ret), "+r"(_num), "+r"(_arg2), "+r"(_arg3), \
"+r"(_arg4), "+r"(_arg5) \
: "0"(_arg1) \
: _NOLIBC_SYSCALL_CLOBBERLIST, "r8" \
); \
_ret; \
})
#define my_syscall6(num, arg1, arg2, arg3, arg4, arg5, arg6) \
({ \
register long _ret __asm__ ("r3"); \
register long _num __asm__ ("r0") = (num); \
register long _arg1 __asm__ ("r3") = (long)(arg1); \
register long _arg2 __asm__ ("r4") = (long)(arg2); \
register long _arg3 __asm__ ("r5") = (long)(arg3); \
register long _arg4 __asm__ ("r6") = (long)(arg4); \
register long _arg5 __asm__ ("r7") = (long)(arg5); \
register long _arg6 __asm__ ("r8") = (long)(arg6); \
\
__asm__ volatile ( \
" sc\n" \
" bns+ 1f\n" \
" neg %0, %0\n" \
"1:\n" \
: "=r"(_ret), "+r"(_num), "+r"(_arg2), "+r"(_arg3), \
"+r"(_arg4), "+r"(_arg5), "+r"(_arg6) \
: "0"(_arg1) \
: _NOLIBC_SYSCALL_CLOBBERLIST \
); \
_ret; \
})
#ifndef __powerpc64__
/* FIXME: For 32-bit PowerPC, with newer gcc compilers (e.g. gcc 13.1.0),
* "omit-frame-pointer" fails with __attribute__((no_stack_protector)) but
* works with __attribute__((__optimize__("-fno-stack-protector")))
*/
#ifdef __no_stack_protector
#undef __no_stack_protector
#define __no_stack_protector __attribute__((__optimize__("-fno-stack-protector")))
#endif
#endif /* !__powerpc64__ */
/* startup code */
void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_stack_protector _start(void)
{
#ifdef __powerpc64__
#if _CALL_ELF == 2
/* with -mabi=elfv2, save TOC/GOT pointer to r2
* r12 is global entry pointer, we use it to compute TOC from r12
* https://www.llvm.org/devmtg/2014-04/PDFs/Talks/Euro-LLVM-2014-Weigand.pdf
* https://refspecs.linuxfoundation.org/ELF/ppc64/PPC-elf64abi.pdf
*/
__asm__ volatile (
"addis 2, 12, .TOC. - _start@ha\n"
"addi 2, 2, .TOC. - _start@l\n"
);
#endif /* _CALL_ELF == 2 */
__asm__ volatile (
"mr 3, 1\n" /* save stack pointer to r3, as arg1 of _start_c */
"clrrdi 1, 1, 4\n" /* align the stack to 16 bytes */
"li 0, 0\n" /* zero the frame pointer */
"stdu 1, -32(1)\n" /* the initial stack frame */
"bl _start_c\n" /* transfer to c runtime */
);
#else
__asm__ volatile (
"mr 3, 1\n" /* save stack pointer to r3, as arg1 of _start_c */
"clrrwi 1, 1, 4\n" /* align the stack to 16 bytes */
"li 0, 0\n" /* zero the frame pointer */
"stwu 1, -16(1)\n" /* the initial stack frame */
"bl _start_c\n" /* transfer to c runtime */
);
#endif
__builtin_unreachable();
}
#endif /* _NOLIBC_ARCH_POWERPC_H */

83
tools/include/nolibc/arch-riscv.h
View File

@ -8,41 +8,7 @@
#define _NOLIBC_ARCH_RISCV_H
#include "compiler.h"
struct sys_stat_struct {
unsigned long st_dev; /* Device. */
unsigned long st_ino; /* File serial number. */
unsigned int st_mode; /* File mode. */
unsigned int st_nlink; /* Link count. */
unsigned int st_uid; /* User ID of the file's owner. */
unsigned int st_gid; /* Group ID of the file's group. */
unsigned long st_rdev; /* Device number, if device. */
unsigned long __pad1;
long st_size; /* Size of file, in bytes. */
int st_blksize; /* Optimal block size for I/O. */
int __pad2;
long st_blocks; /* Number 512-byte blocks allocated. */
long st_atime; /* Time of last access. */
unsigned long st_atime_nsec;
long st_mtime; /* Time of last modification. */
unsigned long st_mtime_nsec;
long st_ctime; /* Time of last status change. */
unsigned long st_ctime_nsec;
unsigned int __unused4;
unsigned int __unused5;
};
#if __riscv_xlen == 64
#define PTRLOG "3"
#define SZREG "8"
#define REG_L "ld"
#define REG_S "sd"
#elif __riscv_xlen == 32
#define PTRLOG "2"
#define SZREG "4"
#define REG_L "lw"
#define REG_S "sw"
#endif
#include "crt.h"
/* Syscalls for RISCV :
* - stack is 16-byte aligned
@ -63,7 +29,7 @@ struct sys_stat_struct {
register long _num __asm__ ("a7") = (num); \
register long _arg1 __asm__ ("a0"); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"ecall\n\t" \
: "=r"(_arg1) \
: "r"(_num) \
@ -77,7 +43,7 @@ struct sys_stat_struct {
register long _num __asm__ ("a7") = (num); \
register long _arg1 __asm__ ("a0") = (long)(arg1); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"ecall\n" \
: "+r"(_arg1) \
: "r"(_num) \
@ -92,7 +58,7 @@ struct sys_stat_struct {
register long _arg1 __asm__ ("a0") = (long)(arg1); \
register long _arg2 __asm__ ("a1") = (long)(arg2); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"ecall\n" \
: "+r"(_arg1) \
: "r"(_arg2), \
@ -109,7 +75,7 @@ struct sys_stat_struct {
register long _arg2 __asm__ ("a1") = (long)(arg2); \
register long _arg3 __asm__ ("a2") = (long)(arg3); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"ecall\n\t" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), \
@ -127,7 +93,7 @@ struct sys_stat_struct {
register long _arg3 __asm__ ("a2") = (long)(arg3); \
register long _arg4 __asm__ ("a3") = (long)(arg4); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"ecall\n" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), "r"(_arg4), \
@ -146,7 +112,7 @@ struct sys_stat_struct {
register long _arg4 __asm__ ("a3") = (long)(arg4); \
register long _arg5 __asm__ ("a4") = (long)(arg5); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"ecall\n" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
@ -166,7 +132,7 @@ struct sys_stat_struct {
register long _arg5 __asm__ ("a4") = (long)(arg5); \
register long _arg6 __asm__ ("a5") = (long)(arg6); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"ecall\n" \
: "+r"(_arg1) \
: "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), "r"(_arg6), \
@ -176,40 +142,17 @@ struct sys_stat_struct {
_arg1; \
})
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
/* startup code */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)
void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_stack_protector _start(void)
{
__asm__ volatile (
".option push\n"
".option norelax\n"
"lla gp, __global_pointer$\n"
"lla gp, __global_pointer$\n"
".option pop\n"
#ifdef _NOLIBC_STACKPROTECTOR
"call __stack_chk_init\n" /* initialize stack protector */
#endif
REG_L" a0, 0(sp)\n" /* argc (a0) was in the stack */
"add a1, sp, "SZREG"\n" /* argv (a1) = sp */
"slli a2, a0, "PTRLOG"\n" /* envp (a2) = SZREG*argc ... */
"add a2, a2, "SZREG"\n" /* + SZREG (skip null) */
"add a2,a2,a1\n" /* + argv */
"add a3, a2, zero\n" /* iterate a3 over envp to find auxv (after NULL) */
"0:\n" /* do { */
REG_L" a4, 0(a3)\n" /* a4 = *a3; */
"add a3, a3, "SZREG"\n" /* a3 += sizeof(void*); */
"bne a4, zero, 0b\n" /* } while (a4); */
"lui a4, %hi(_auxv)\n" /* a4 = &_auxv (high bits) */
REG_S" a3, %lo(_auxv)(a4)\n" /* store a3 into _auxv */
"lui a3, %hi(environ)\n" /* a3 = &environ (high bits) */
REG_S" a2,%lo(environ)(a3)\n"/* store envp(a2) into environ */
"andi sp,a1,-16\n" /* sp must be 16-byte aligned */
"call main\n" /* main() returns the status code, we'll exit with it. */
"li a7, 93\n" /* NR_exit == 93 */
"ecall\n"
"mv a0, sp\n" /* save stack pointer to a0, as arg1 of _start_c */
"andi sp, a0, -16\n" /* sp must be 16-byte aligned */
"call _start_c\n" /* transfer to c runtime */
);
__builtin_unreachable();
}

77
tools/include/nolibc/arch-s390.h
View File

@ -9,31 +9,7 @@
#include <asm/unistd.h>
#include "compiler.h"
/* The struct returned by the stat() syscall, equivalent to stat64(). The
* syscall returns 116 bytes and stops in the middle of __unused.
*/
struct sys_stat_struct {
unsigned long st_dev;
unsigned long st_ino;
unsigned long st_nlink;
unsigned int st_mode;
unsigned int st_uid;
unsigned int st_gid;
unsigned int __pad1;
unsigned long st_rdev;
unsigned long st_size;
unsigned long st_atime;
unsigned long st_atime_nsec;
unsigned long st_mtime;
unsigned long st_mtime_nsec;
unsigned long st_ctime;
unsigned long st_ctime_nsec;
unsigned long st_blksize;
long st_blocks;
unsigned long __unused[3];
};
#include "crt.h"
/* Syscalls for s390:
* - registers are 64-bit
@ -52,7 +28,7 @@ struct sys_stat_struct {
register long _num __asm__ ("1") = (num); \
register long _rc __asm__ ("2"); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"svc 0\n" \
: "=d"(_rc) \
: "d"(_num) \
@ -66,7 +42,7 @@ struct sys_stat_struct {
register long _num __asm__ ("1") = (num); \
register long _arg1 __asm__ ("2") = (long)(arg1); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"svc 0\n" \
: "+d"(_arg1) \
: "d"(_num) \
@ -81,7 +57,7 @@ struct sys_stat_struct {
register long _arg1 __asm__ ("2") = (long)(arg1); \
register long _arg2 __asm__ ("3") = (long)(arg2); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"svc 0\n" \
: "+d"(_arg1) \
: "d"(_arg2), "d"(_num) \
@ -97,7 +73,7 @@ struct sys_stat_struct {
register long _arg2 __asm__ ("3") = (long)(arg2); \
register long _arg3 __asm__ ("4") = (long)(arg3); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"svc 0\n" \
: "+d"(_arg1) \
: "d"(_arg2), "d"(_arg3), "d"(_num) \
@ -114,7 +90,7 @@ struct sys_stat_struct {
register long _arg3 __asm__ ("4") = (long)(arg3); \
register long _arg4 __asm__ ("5") = (long)(arg4); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"svc 0\n" \
: "+d"(_arg1) \
: "d"(_arg2), "d"(_arg3), "d"(_arg4), "d"(_num) \
@ -132,7 +108,7 @@ struct sys_stat_struct {
register long _arg4 __asm__ ("5") = (long)(arg4); \
register long _arg5 __asm__ ("6") = (long)(arg5); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"svc 0\n" \
: "+d"(_arg1) \
: "d"(_arg2), "d"(_arg3), "d"(_arg4), "d"(_arg5), \
@ -152,7 +128,7 @@ struct sys_stat_struct {
register long _arg5 __asm__ ("6") = (long)(arg5); \
register long _arg6 __asm__ ("7") = (long)(arg6); \
\
__asm__ volatile ( \
__asm__ volatile ( \
"svc 0\n" \
: "+d"(_arg1) \
: "d"(_arg2), "d"(_arg3), "d"(_arg4), "d"(_arg5), \
@ -162,41 +138,14 @@ struct sys_stat_struct {
_arg1; \
})
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
/* startup code */
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)
void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_stack_protector _start(void)
{
__asm__ volatile (
"lg %r2,0(%r15)\n" /* argument count */
"la %r3,8(%r15)\n" /* argument pointers */
"xgr %r0,%r0\n" /* r0 will be our NULL value */
/* search for envp */
"lgr %r4,%r3\n" /* start at argv */
"0:\n"
"clg %r0,0(%r4)\n" /* entry zero? */
"la %r4,8(%r4)\n" /* advance pointer */
"jnz 0b\n" /* no -> test next pointer */
/* yes -> r4 now contains start of envp */
"larl %r1,environ\n"
"stg %r4,0(%r1)\n"
/* search for auxv */
"lgr %r5,%r4\n" /* start at envp */
"1:\n"
"clg %r0,0(%r5)\n" /* entry zero? */
"la %r5,8(%r5)\n" /* advance pointer */
"jnz 1b\n" /* no -> test next pointer */
"larl %r1,_auxv\n" /* yes -> store value in _auxv */
"stg %r5,0(%r1)\n"
"aghi %r15,-160\n" /* allocate new stackframe */
"xc 0(8,%r15),0(%r15)\n" /* clear backchain */
"brasl %r14,main\n" /* ret value of main is arg to exit */
"lghi %r1,1\n" /* __NR_exit */
"svc 0\n"
"lgr %r2, %r15\n" /* save stack pointer to %r2, as arg1 of _start_c */
"aghi %r15, -160\n" /* allocate new stackframe */
"xc 0(8,%r15), 0(%r15)\n" /* clear backchain */
"brasl %r14, _start_c\n" /* transfer to c runtime */
);
__builtin_unreachable();
}

86
tools/include/nolibc/arch-x86_64.h
View File

@ -8,33 +8,7 @@
#define _NOLIBC_ARCH_X86_64_H
#include "compiler.h"
/* The struct returned by the stat() syscall, equivalent to stat64(). The
* syscall returns 116 bytes and stops in the middle of __unused.
*/
struct sys_stat_struct {
unsigned long st_dev;
unsigned long st_ino;
unsigned long st_nlink;
unsigned int st_mode;
unsigned int st_uid;
unsigned int st_gid;
unsigned int __pad0;
unsigned long st_rdev;
long st_size;
long st_blksize;
long st_blocks;
unsigned long st_atime;
unsigned long st_atime_nsec;
unsigned long st_mtime;
unsigned long st_mtime_nsec;
unsigned long st_ctime;
unsigned long st_ctime_nsec;
long __unused[3];
};
#include "crt.h"
/* Syscalls for x86_64 :
* - registers are 64-bit
@ -59,8 +33,8 @@ struct sys_stat_struct {
({ \
long _ret; \
register long _num __asm__ ("rax") = (num); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"syscall\n" \
: "=a"(_ret) \
: "0"(_num) \
@ -74,8 +48,8 @@ struct sys_stat_struct {
long _ret; \
register long _num __asm__ ("rax") = (num); \
register long _arg1 __asm__ ("rdi") = (long)(arg1); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"syscall\n" \
: "=a"(_ret) \
: "r"(_arg1), \
@ -91,8 +65,8 @@ struct sys_stat_struct {
register long _num __asm__ ("rax") = (num); \
register long _arg1 __asm__ ("rdi") = (long)(arg1); \
register long _arg2 __asm__ ("rsi") = (long)(arg2); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"syscall\n" \
: "=a"(_ret) \
: "r"(_arg1), "r"(_arg2), \
@ -109,8 +83,8 @@ struct sys_stat_struct {
register long _arg1 __asm__ ("rdi") = (long)(arg1); \
register long _arg2 __asm__ ("rsi") = (long)(arg2); \
register long _arg3 __asm__ ("rdx") = (long)(arg3); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"syscall\n" \
: "=a"(_ret) \
: "r"(_arg1), "r"(_arg2), "r"(_arg3), \
@ -128,8 +102,8 @@ struct sys_stat_struct {
register long _arg2 __asm__ ("rsi") = (long)(arg2); \
register long _arg3 __asm__ ("rdx") = (long)(arg3); \
register long _arg4 __asm__ ("r10") = (long)(arg4); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"syscall\n" \
: "=a"(_ret) \
: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), \
@ -148,8 +122,8 @@ struct sys_stat_struct {
register long _arg3 __asm__ ("rdx") = (long)(arg3); \
register long _arg4 __asm__ ("r10") = (long)(arg4); \
register long _arg5 __asm__ ("r8") = (long)(arg5); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"syscall\n" \
: "=a"(_ret) \
: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
@ -169,8 +143,8 @@ struct sys_stat_struct {
register long _arg4 __asm__ ("r10") = (long)(arg4); \
register long _arg5 __asm__ ("r8") = (long)(arg5); \
register long _arg6 __asm__ ("r9") = (long)(arg6); \
\
__asm__ volatile ( \
\
__asm__ volatile ( \
"syscall\n" \
: "=a"(_ret) \
: "r"(_arg1), "r"(_arg2), "r"(_arg3), "r"(_arg4), "r"(_arg5), \
@ -180,9 +154,6 @@ struct sys_stat_struct {
_ret; \
})
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
/* startup code */
/*
* x86-64 System V ABI mandates:
@ -190,29 +161,14 @@ const unsigned long *_auxv __attribute__((weak));
* 2) The deepest stack frame should be zero (the %rbp).
*
*/
void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __no_stack_protector _start(void)
void __attribute__((weak, noreturn, optimize("Os", "omit-frame-pointer"))) __no_stack_protector _start(void)
{
__asm__ volatile (
#ifdef _NOLIBC_STACKPROTECTOR
"call __stack_chk_init\n" /* initialize stack protector */
#endif
"pop %rdi\n" /* argc (first arg, %rdi) */
"mov %rsp, %rsi\n" /* argv[] (second arg, %rsi) */
"lea 8(%rsi,%rdi,8),%rdx\n" /* then a NULL then envp (third arg, %rdx) */
"mov %rdx, environ\n" /* save environ */
"xor %ebp, %ebp\n" /* zero the stack frame */
"mov %rdx, %rax\n" /* search for auxv (follows NULL after last env) */
"0:\n"
"add $8, %rax\n" /* search for auxv using rax, it follows the */
"cmp -8(%rax), %rbp\n" /* ... NULL after last env (rbp is zero here) */
"jnz 0b\n"
"mov %rax, _auxv\n" /* save it into _auxv */
"and $-16, %rsp\n" /* x86 ABI : esp must be 16-byte aligned before call */
"call main\n" /* main() returns the status code, we'll exit with it. */
"mov %eax, %edi\n" /* retrieve exit code (32 bit) */
"mov $60, %eax\n" /* NR_exit == 60 */
"syscall\n" /* really exit */
"hlt\n" /* ensure it does not return */
"xor %ebp, %ebp\n" /* zero the stack frame */
"mov %rsp, %rdi\n" /* save stack pointer to %rdi, as arg1 of _start_c */
"and $-16, %rsp\n" /* %rsp must be 16-byte aligned before call */
"call _start_c\n" /* transfer to c runtime */
"hlt\n" /* ensure it does not return */
);
__builtin_unreachable();
}

2
tools/include/nolibc/arch.h
View File

@ -25,6 +25,8 @@
#include "arch-aarch64.h"
#elif defined(__mips__) && defined(_ABIO32)
#include "arch-mips.h"
#elif defined(__powerpc__)
#include "arch-powerpc.h"
#elif defined(__riscv)
#include "arch-riscv.h"
#elif defined(__s390x__)

61
tools/include/nolibc/crt.h Normal file
View File

@ -0,0 +1,61 @@
/* SPDX-License-Identifier: LGPL-2.1 OR MIT */
/*
* C Run Time support for NOLIBC
* Copyright (C) 2023 Zhangjin Wu <falcon@tinylab.org>
*/
#ifndef _NOLIBC_CRT_H
#define _NOLIBC_CRT_H
char **environ __attribute__((weak));
const unsigned long *_auxv __attribute__((weak));
static void __stack_chk_init(void);
static void exit(int);
void _start_c(long *sp)
{
long argc;
char **argv;
char **envp;
const unsigned long *auxv;
/* silence potential warning: conflicting types for 'main' */
int _nolibc_main(int, char **, char **) __asm__ ("main");
/* initialize stack protector */
__stack_chk_init();
/*
* sp : argc <-- argument count, required by main()
* argv: argv[0] <-- argument vector, required by main()
* argv[1]
* ...
* argv[argc-1]
* null
* environ: environ[0] <-- environment variables, required by main() and getenv()
* environ[1]
* ...
* null
* _auxv: _auxv[0] <-- auxiliary vector, required by getauxval()
* _auxv[1]
* ...
* null
*/
/* assign argc and argv */
argc = *sp;
argv = (void *)(sp + 1);
/* find environ */
environ = envp = argv + argc + 1;
/* find _auxv */
for (auxv = (void *)envp; *auxv++;)
;
_auxv = auxv;
/* go to application */
exit(_nolibc_main(argc, argv, envp));
}
#endif /* _NOLIBC_CRT_H */

9
tools/include/nolibc/nolibc.h
View File

@ -13,11 +13,10 @@
* Syscalls are split into 3 levels:
* - The lower level is the arch-specific syscall() definition, consisting in
* assembly code in compound expressions. These are called my_syscall0() to
* my_syscall6() depending on the number of arguments. The MIPS
* implementation is limited to 5 arguments. All input arguments are cast
* to a long stored in a register. These expressions always return the
* syscall's return value as a signed long value which is often either a
* pointer or the negated errno value.
* my_syscall6() depending on the number of arguments. All input arguments
* are castto a long stored in a register. These expressions always return
* the syscall's return value as a signed long value which is often either
* a pointer or the negated errno value.
*
* - The second level is mostly architecture-independent. It is made of
* static functions called sys_<name>() which rely on my_syscallN()

5
tools/include/nolibc/stackprotector.h
View File

@ -37,14 +37,15 @@ void __stack_chk_fail_local(void)
__attribute__((weak,section(".data.nolibc_stack_chk")))
uintptr_t __stack_chk_guard;
__attribute__((weak,section(".text.nolibc_stack_chk"))) __no_stack_protector
void __stack_chk_init(void)
static __no_stack_protector void __stack_chk_init(void)
{
my_syscall3(__NR_getrandom, &__stack_chk_guard, sizeof(__stack_chk_guard), 0);
/* a bit more randomness in case getrandom() fails, ensure the guard is never 0 */
if (__stack_chk_guard != (uintptr_t) &__stack_chk_guard)
__stack_chk_guard ^= (uintptr_t) &__stack_chk_guard;
}
#else /* !defined(_NOLIBC_STACKPROTECTOR) */
static void __stack_chk_init(void) {}
#endif /* defined(_NOLIBC_STACKPROTECTOR) */
#endif /* _NOLIBC_STACKPROTECTOR_H */

2
tools/include/nolibc/stdint.h
View File

@ -15,7 +15,7 @@ typedef unsigned int uint32_t;
typedef signed int int32_t;
typedef unsigned long long uint64_t;
typedef signed long long int64_t;
typedef unsigned long size_t;
typedef __SIZE_TYPE__ size_t;
typedef signed long ssize_t;
typedef unsigned long uintptr_t;
typedef signed long intptr_t;

27
tools/include/nolibc/stdio.h
View File

@ -21,6 +21,11 @@
#define EOF (-1)
#endif
/* Buffering mode used by setvbuf. */
#define _IOFBF 0 /* Fully buffered. */
#define _IOLBF 1 /* Line buffered. */
#define _IONBF 2 /* No buffering. */
/* just define FILE as a non-empty type. The value of the pointer gives
* the FD: FILE=~fd for fd>=0 or NULL for fd<0. This way positive FILE
* are immediately identified as abnormal entries (i.e. possible copies
@ -350,6 +355,28 @@ void perror(const char *msg)
fprintf(stderr, "%s%serrno=%d\n", (msg && *msg) ? msg : "", (msg && *msg) ? ": " : "", errno);
}
static __attribute__((unused))
int setvbuf(FILE *stream __attribute__((unused)),
char *buf __attribute__((unused)),
int mode,
size_t size __attribute__((unused)))
{
/*
* nolibc does not support buffering so this is a nop. Just check mode
* is valid as required by the spec.
*/
switch (mode) {
case _IOFBF:
case _IOLBF:
case _IONBF:
break;
default:
return EOF;
}
return 0;
}
/* make sure to include all global symbols */
#include "nolibc.h"

12
tools/include/nolibc/stdlib.h
View File

@ -83,11 +83,10 @@ void free(void *ptr)
* declared as a char **, and must be terminated by a NULL (it is recommended
* to set this variable to the "envp" argument of main()). If the requested
* environment variable exists its value is returned otherwise NULL is
* returned. getenv() is forcefully inlined so that the reference to "environ"
* will be dropped if unused, even at -O0.
* returned.
*/
static __attribute__((unused))
char *_getenv(const char *name, char **environ)
char *getenv(const char *name)
{
int idx, i;
@ -102,13 +101,6 @@ char *_getenv(const char *name, char **environ)
return NULL;
}
static __inline__ __attribute__((unused,always_inline))
char *getenv(const char *name)
{
extern char **environ;
return _getenv(name, environ);
}
static __attribute__((unused))
unsigned long getauxval(unsigned long type)
{

534
tools/include/nolibc/sys.h
View File

@ -21,7 +21,6 @@
#include <linux/auxvec.h>
#include <linux/fcntl.h> /* for O_* and AT_* */
#include <linux/stat.h> /* for statx() */
#include <linux/reboot.h> /* for LINUX_REBOOT_* */
#include <linux/prctl.h>
#include "arch.h"
@ -29,6 +28,22 @@
#include "types.h"
/* Syscall return helper: takes the syscall value in argument and checks for an
* error in it. This may only be used with signed returns (int or long), but
* not with pointers. An error is any value < 0. When an error is encountered,
* -ret is set into errno and -1 is returned. Otherwise the returned value is
* passed as-is with its type preserved.
*/
#define __sysret(arg) \
({ \
__typeof__(arg) __sysret_arg = (arg); \
(__sysret_arg < 0) /* error ? */ \
? (({ SET_ERRNO(-__sysret_arg); }), -1) /* ret -1 with errno = -arg */ \
: __sysret_arg; /* return original value */ \
})
/* 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
@ -78,10 +93,10 @@ int brk(void *addr)
static __attribute__((unused))
void *sbrk(intptr_t inc)
{
void *ret;
/* first call to find current end */
if ((ret = sys_brk(0)) && (sys_brk(ret + inc) == ret + inc))
void *ret = sys_brk(0);
if (ret && sys_brk(ret + inc) == ret + inc)
return ret + inc;
SET_ERRNO(ENOMEM);
@ -102,13 +117,7 @@ int sys_chdir(const char *path)
static __attribute__((unused))
int chdir(const char *path)
{
int ret = sys_chdir(path);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_chdir(path));
}
@ -124,20 +133,14 @@ int sys_chmod(const char *path, mode_t mode)
#elif defined(__NR_chmod)
return my_syscall2(__NR_chmod, path, mode);
#else
#error Neither __NR_fchmodat nor __NR_chmod defined, cannot implement sys_chmod()
return -ENOSYS;
#endif
}
static __attribute__((unused))
int chmod(const char *path, mode_t mode)
{
int ret = sys_chmod(path, mode);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_chmod(path, mode));
}
@ -153,20 +156,14 @@ int sys_chown(const char *path, uid_t owner, gid_t group)
#elif defined(__NR_chown)
return my_syscall3(__NR_chown, path, owner, group);
#else
#error Neither __NR_fchownat nor __NR_chown defined, cannot implement sys_chown()
return -ENOSYS;
#endif
}
static __attribute__((unused))
int chown(const char *path, uid_t owner, gid_t group)
{
int ret = sys_chown(path, owner, group);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_chown(path, owner, group));
}
@ -183,13 +180,7 @@ int sys_chroot(const char *path)
static __attribute__((unused))
int chroot(const char *path)
{
int ret = sys_chroot(path);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_chroot(path));
}
@ -206,13 +197,7 @@ int sys_close(int fd)
static __attribute__((unused))
int close(int fd)
{
int ret = sys_close(fd);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_close(fd));
}
@ -229,13 +214,7 @@ int sys_dup(int fd)
static __attribute__((unused))
int dup(int fd)
{
int ret = sys_dup(fd);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_dup(fd));
}
@ -251,20 +230,14 @@ int sys_dup2(int old, int new)
#elif defined(__NR_dup2)
return my_syscall2(__NR_dup2, old, new);
#else
#error Neither __NR_dup3 nor __NR_dup2 defined, cannot implement sys_dup2()
return -ENOSYS;
#endif
}
static __attribute__((unused))
int dup2(int old, int new)
{
int ret = sys_dup2(old, new);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_dup2(old, new));
}
@ -282,13 +255,7 @@ int sys_dup3(int old, int new, int flags)
static __attribute__((unused))
int dup3(int old, int new, int flags)
{
int ret = sys_dup3(old, new, flags);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_dup3(old, new, flags));
}
#endif
@ -306,13 +273,7 @@ int sys_execve(const char *filename, char *const argv[], char *const envp[])
static __attribute__((unused))
int execve(const char *filename, char *const argv[], char *const envp[])
{
int ret = sys_execve(filename, argv, envp);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_execve(filename, argv, envp));
}
@ -351,7 +312,7 @@ pid_t sys_fork(void)
#elif defined(__NR_fork)
return my_syscall0(__NR_fork);
#else
#error Neither __NR_clone nor __NR_fork defined, cannot implement sys_fork()
return -ENOSYS;
#endif
}
#endif
@ -359,13 +320,7 @@ pid_t sys_fork(void)
static __attribute__((unused))
pid_t fork(void)
{
pid_t ret = sys_fork();
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_fork());
}
@ -382,13 +337,7 @@ int sys_fsync(int fd)
static __attribute__((unused))
int fsync(int fd)
{
int ret = sys_fsync(fd);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_fsync(fd));
}
@ -405,13 +354,7 @@ int sys_getdents64(int fd, struct linux_dirent64 *dirp, int count)
static __attribute__((unused))
int getdents64(int fd, struct linux_dirent64 *dirp, int count)
{
int ret = sys_getdents64(fd, dirp, count);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_getdents64(fd, dirp, count));
}
@ -449,13 +392,7 @@ pid_t sys_getpgid(pid_t pid)
static __attribute__((unused))
pid_t getpgid(pid_t pid)
{
pid_t ret = sys_getpgid(pid);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_getpgid(pid));
}
@ -529,21 +466,13 @@ pid_t gettid(void)
static unsigned long getauxval(unsigned long key);
/*
* long getpagesize(void);
* int getpagesize(void);
*/
static __attribute__((unused))
long getpagesize(void)
int getpagesize(void)
{
long ret;
ret = getauxval(AT_PAGESZ);
if (!ret) {
SET_ERRNO(ENOENT);
return -1;
}
return ret;
return __sysret((int)getauxval(AT_PAGESZ) ?: -ENOENT);
}
@ -554,19 +483,17 @@ long getpagesize(void)
static __attribute__((unused))
int sys_gettimeofday(struct timeval *tv, struct timezone *tz)
{
#ifdef __NR_gettimeofday
return my_syscall2(__NR_gettimeofday, tv, tz);
#else
return -ENOSYS;
#endif
}
static __attribute__((unused))
int gettimeofday(struct timeval *tv, struct timezone *tz)
{
int ret = sys_gettimeofday(tv, tz);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_gettimeofday(tv, tz));
}
@ -604,13 +531,7 @@ int sys_ioctl(int fd, unsigned long req, void *value)
static __attribute__((unused))
int ioctl(int fd, unsigned long req, void *value)
{
int ret = sys_ioctl(fd, req, value);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_ioctl(fd, req, value));
}
/*
@ -626,13 +547,7 @@ int sys_kill(pid_t pid, int signal)
static __attribute__((unused))
int kill(pid_t pid, int signal)
{
int ret = sys_kill(pid, signal);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_kill(pid, signal));
}
@ -648,20 +563,14 @@ int sys_link(const char *old, const char *new)
#elif defined(__NR_link)
return my_syscall2(__NR_link, old, new);
#else
#error Neither __NR_linkat nor __NR_link defined, cannot implement sys_link()
return -ENOSYS;
#endif
}
static __attribute__((unused))
int link(const char *old, const char *new)
{
int ret = sys_link(old, new);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_link(old, new));
}
@ -672,19 +581,17 @@ int link(const char *old, const char *new)
static __attribute__((unused))
off_t sys_lseek(int fd, off_t offset, int whence)
{
#ifdef __NR_lseek
return my_syscall3(__NR_lseek, fd, offset, whence);
#else
return -ENOSYS;
#endif
}
static __attribute__((unused))
off_t lseek(int fd, off_t offset, int whence)
{
off_t ret = sys_lseek(fd, offset, whence);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_lseek(fd, offset, whence));
}
@ -700,20 +607,36 @@ int sys_mkdir(const char *path, mode_t mode)
#elif defined(__NR_mkdir)
return my_syscall2(__NR_mkdir, path, mode);
#else
#error Neither __NR_mkdirat nor __NR_mkdir defined, cannot implement sys_mkdir()
return -ENOSYS;
#endif
}
static __attribute__((unused))
int mkdir(const char *path, mode_t mode)
{
int ret = sys_mkdir(path, mode);
return __sysret(sys_mkdir(path, mode));
}
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
/*
* int rmdir(const char *path);
*/
static __attribute__((unused))
int sys_rmdir(const char *path)
{
#ifdef __NR_rmdir
return my_syscall1(__NR_rmdir, path);
#elif defined(__NR_unlinkat)
return my_syscall3(__NR_unlinkat, AT_FDCWD, path, AT_REMOVEDIR);
#else
return -ENOSYS;
#endif
}
static __attribute__((unused))
int rmdir(const char *path)
{
return __sysret(sys_rmdir(path));
}
@ -729,42 +652,21 @@ long sys_mknod(const char *path, mode_t mode, dev_t dev)
#elif defined(__NR_mknod)
return my_syscall3(__NR_mknod, path, mode, dev);
#else
#error Neither __NR_mknodat nor __NR_mknod defined, cannot implement sys_mknod()
return -ENOSYS;
#endif
}
static __attribute__((unused))
int mknod(const char *path, mode_t mode, dev_t dev)
{
int ret = sys_mknod(path, mode, dev);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_mknod(path, mode, dev));
}
#ifndef MAP_SHARED
#define MAP_SHARED 0x01 /* Share changes */
#define MAP_PRIVATE 0x02 /* Changes are private */
#define MAP_SHARED_VALIDATE 0x03 /* share + validate extension flags */
#endif
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif
#ifndef sys_mmap
static __attribute__((unused))
void *sys_mmap(void *addr, size_t length, int prot, int flags, int fd,
off_t offset)
{
#ifndef my_syscall6
/* Function not implemented. */
return (void *)-ENOSYS;
#else
int n;
#if defined(__NR_mmap2)
@ -775,10 +677,14 @@ void *sys_mmap(void *addr, size_t length, int prot, int flags, int fd,
#endif
return (void *)my_syscall6(n, addr, length, prot, flags, fd, offset);
#endif
}
#endif
/* Note that on Linux, MAP_FAILED is -1 so we can use the generic __sysret()
* which returns -1 upon error and still satisfy user land that checks for
* MAP_FAILED.
*/
static __attribute__((unused))
void *mmap(void *addr, size_t length, int prot, int flags, int fd, off_t offset)
{
@ -800,13 +706,7 @@ int sys_munmap(void *addr, size_t length)
static __attribute__((unused))
int munmap(void *addr, size_t length)
{
int ret = sys_munmap(addr, length);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_munmap(addr, length));
}
/*
@ -826,13 +726,7 @@ int mount(const char *src, const char *tgt,
const char *fst, unsigned long flags,
const void *data)
{
int ret = sys_mount(src, tgt, fst, flags, data);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_mount(src, tgt, fst, flags, data));
}
@ -848,7 +742,7 @@ int sys_open(const char *path, int flags, mode_t mode)
#elif defined(__NR_open)
return my_syscall3(__NR_open, path, flags, mode);
#else
#error Neither __NR_openat nor __NR_open defined, cannot implement sys_open()
return -ENOSYS;
#endif
}
@ -856,7 +750,6 @@ static __attribute__((unused))
int open(const char *path, int flags, ...)
{
mode_t mode = 0;
int ret;
if (flags & O_CREAT) {
va_list args;
@ -866,13 +759,31 @@ int open(const char *path, int flags, ...)
va_end(args);
}
ret = sys_open(path, flags, mode);
return __sysret(sys_open(path, flags, mode));
}
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
/*
* int pipe2(int pipefd[2], int flags);
* int pipe(int pipefd[2]);
*/
static __attribute__((unused))
int sys_pipe2(int pipefd[2], int flags)
{
return my_syscall2(__NR_pipe2, pipefd, flags);
}
static __attribute__((unused))
int pipe2(int pipefd[2], int flags)
{
return __sysret(sys_pipe2(pipefd, flags));
}
static __attribute__((unused))
int pipe(int pipefd[2])
{
return pipe2(pipefd, 0);
}
@ -892,13 +803,7 @@ static __attribute__((unused))
int prctl(int option, unsigned long arg2, unsigned long arg3,
unsigned long arg4, unsigned long arg5)
{
int ret = sys_prctl(option, arg2, arg3, arg4, arg5);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_prctl(option, arg2, arg3, arg4, arg5));
}
@ -915,13 +820,7 @@ int sys_pivot_root(const char *new, const char *old)
static __attribute__((unused))
int pivot_root(const char *new, const char *old)
{
int ret = sys_pivot_root(new, old);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_pivot_root(new, old));
}
@ -943,20 +842,14 @@ int sys_poll(struct pollfd *fds, int nfds, int timeout)
#elif defined(__NR_poll)
return my_syscall3(__NR_poll, fds, nfds, timeout);
#else
#error Neither __NR_ppoll nor __NR_poll defined, cannot implement sys_poll()
return -ENOSYS;
#endif
}
static __attribute__((unused))
int poll(struct pollfd *fds, int nfds, int timeout)
{
int ret = sys_poll(fds, nfds, timeout);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_poll(fds, nfds, timeout));
}
@ -973,13 +866,7 @@ ssize_t sys_read(int fd, void *buf, size_t count)
static __attribute__((unused))
ssize_t read(int fd, void *buf, size_t count)
{
ssize_t ret = sys_read(fd, buf, count);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_read(fd, buf, count));
}
@ -997,13 +884,7 @@ ssize_t sys_reboot(int magic1, int magic2, int cmd, void *arg)
static __attribute__((unused))
int reboot(int cmd)
{
int ret = sys_reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, 0);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_reboot(LINUX_REBOOT_MAGIC1, LINUX_REBOOT_MAGIC2, cmd, 0));
}
@ -1020,13 +901,7 @@ int sys_sched_yield(void)
static __attribute__((unused))
int sched_yield(void)
{
int ret = sys_sched_yield();
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_sched_yield());
}
@ -1059,20 +934,14 @@ int sys_select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeva
#endif
return my_syscall5(__NR__newselect, nfds, rfds, wfds, efds, timeout);
#else
#error None of __NR_select, __NR_pselect6, nor __NR__newselect defined, cannot implement sys_select()
return -ENOSYS;
#endif
}
static __attribute__((unused))
int select(int nfds, fd_set *rfds, fd_set *wfds, fd_set *efds, struct timeval *timeout)
{
int ret = sys_select(nfds, rfds, wfds, efds, timeout);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_select(nfds, rfds, wfds, efds, timeout));
}
@ -1089,13 +958,7 @@ int sys_setpgid(pid_t pid, pid_t pgid)
static __attribute__((unused))
int setpgid(pid_t pid, pid_t pgid)
{
int ret = sys_setpgid(pid, pgid);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_setpgid(pid, pgid));
}
@ -1112,55 +975,41 @@ pid_t sys_setsid(void)
static __attribute__((unused))
pid_t setsid(void)
{
pid_t ret = sys_setsid();
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_setsid());
}
#if defined(__NR_statx)
/*
* int statx(int fd, const char *path, int flags, unsigned int mask, struct statx *buf);
* int stat(const char *path, struct stat *buf);
*/
static __attribute__((unused))
int sys_statx(int fd, const char *path, int flags, unsigned int mask, struct statx *buf)
{
#ifdef __NR_statx
return my_syscall5(__NR_statx, fd, path, flags, mask, buf);
#else
return -ENOSYS;
#endif
}
static __attribute__((unused))
int statx(int fd, const char *path, int flags, unsigned int mask, struct statx *buf)
{
int ret = sys_statx(fd, path, flags, mask, buf);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_statx(fd, path, flags, mask, buf));
}
#endif
/*
* int stat(const char *path, struct stat *buf);
* Warning: the struct stat's layout is arch-dependent.
*/
#if defined(__NR_statx) && !defined(__NR_newfstatat) && !defined(__NR_stat)
/*
* Maybe we can just use statx() when available for all architectures?
*/
static __attribute__((unused))
int sys_stat(const char *path, struct stat *buf)
int stat(const char *path, struct stat *buf)
{
struct statx statx;
long ret;
ret = sys_statx(AT_FDCWD, path, AT_NO_AUTOMOUNT, STATX_BASIC_STATS, &statx);
ret = __sysret(sys_statx(AT_FDCWD, path, AT_NO_AUTOMOUNT, STATX_BASIC_STATS, &statx));
if (ret == -1)
return ret;
buf->st_dev = ((statx.stx_dev_minor & 0xff)
| (statx.stx_dev_major << 8)
| ((statx.stx_dev_minor & ~0xff) << 12));
@ -1181,53 +1030,8 @@ int sys_stat(const char *path, struct stat *buf)
buf->st_mtim.tv_nsec = statx.stx_mtime.tv_nsec;
buf->st_ctim.tv_sec = statx.stx_ctime.tv_sec;
buf->st_ctim.tv_nsec = statx.stx_ctime.tv_nsec;
return ret;
}
#else
static __attribute__((unused))
int sys_stat(const char *path, struct stat *buf)
{
struct sys_stat_struct stat;
long ret;
#ifdef __NR_newfstatat
/* only solution for arm64 */
ret = my_syscall4(__NR_newfstatat, AT_FDCWD, path, &stat, 0);
#elif defined(__NR_stat)
ret = my_syscall2(__NR_stat, path, &stat);
#else
#error Neither __NR_newfstatat nor __NR_stat defined, cannot implement sys_stat()
#endif
buf->st_dev = stat.st_dev;
buf->st_ino = stat.st_ino;
buf->st_mode = stat.st_mode;
buf->st_nlink = stat.st_nlink;
buf->st_uid = stat.st_uid;
buf->st_gid = stat.st_gid;
buf->st_rdev = stat.st_rdev;
buf->st_size = stat.st_size;
buf->st_blksize = stat.st_blksize;
buf->st_blocks = stat.st_blocks;
buf->st_atim.tv_sec = stat.st_atime;
buf->st_atim.tv_nsec = stat.st_atime_nsec;
buf->st_mtim.tv_sec = stat.st_mtime;
buf->st_mtim.tv_nsec = stat.st_mtime_nsec;
buf->st_ctim.tv_sec = stat.st_ctime;
buf->st_ctim.tv_nsec = stat.st_ctime_nsec;
return ret;
}
#endif
static __attribute__((unused))
int stat(const char *path, struct stat *buf)
{
int ret = sys_stat(path, buf);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return 0;
}
@ -1243,20 +1047,14 @@ int sys_symlink(const char *old, const char *new)
#elif defined(__NR_symlink)
return my_syscall2(__NR_symlink, old, new);
#else
#error Neither __NR_symlinkat nor __NR_symlink defined, cannot implement sys_symlink()
return -ENOSYS;
#endif
}
static __attribute__((unused))
int symlink(const char *old, const char *new)
{
int ret = sys_symlink(old, new);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_symlink(old, new));
}
@ -1290,13 +1088,7 @@ int sys_umount2(const char *path, int flags)
static __attribute__((unused))
int umount2(const char *path, int flags)
{
int ret = sys_umount2(path, flags);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_umount2(path, flags));
}
@ -1312,20 +1104,14 @@ int sys_unlink(const char *path)
#elif defined(__NR_unlink)
return my_syscall1(__NR_unlink, path);
#else
#error Neither __NR_unlinkat nor __NR_unlink defined, cannot implement sys_unlink()
return -ENOSYS;
#endif
}
static __attribute__((unused))
int unlink(const char *path)
{
int ret = sys_unlink(path);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_unlink(path));
}
@ -1338,44 +1124,30 @@ int unlink(const char *path)
static __attribute__((unused))
pid_t sys_wait4(pid_t pid, int *status, int options, struct rusage *rusage)
{
#ifdef __NR_wait4
return my_syscall4(__NR_wait4, pid, status, options, rusage);
#else
return -ENOSYS;
#endif
}
static __attribute__((unused))
pid_t wait(int *status)
{
pid_t ret = sys_wait4(-1, status, 0, NULL);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_wait4(-1, status, 0, NULL));
}
static __attribute__((unused))
pid_t wait4(pid_t pid, int *status, int options, struct rusage *rusage)
{
pid_t ret = sys_wait4(pid, status, options, rusage);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_wait4(pid, status, options, rusage));
}
static __attribute__((unused))
pid_t waitpid(pid_t pid, int *status, int options)
{
pid_t ret = sys_wait4(pid, status, options, NULL);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_wait4(pid, status, options, NULL));
}
@ -1392,13 +1164,7 @@ ssize_t sys_write(int fd, const void *buf, size_t count)
static __attribute__((unused))
ssize_t write(int fd, const void *buf, size_t count)
{
ssize_t ret = sys_write(fd, buf, count);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_write(fd, buf, count));
}
@ -1415,13 +1181,7 @@ int sys_memfd_create(const char *name, unsigned int flags)
static __attribute__((unused))
int memfd_create(const char *name, unsigned int flags)
{
ssize_t ret = sys_memfd_create(name, flags);
if (ret < 0) {
SET_ERRNO(-ret);
ret = -1;
}
return ret;
return __sysret(sys_memfd_create(name, flags));
}
/* make sure to include all global symbols */

22
tools/include/nolibc/types.h
View File

@ -8,13 +8,15 @@
#define _NOLIBC_TYPES_H
#include "std.h"
#include <linux/time.h>
#include <linux/mman.h>
#include <linux/reboot.h> /* for LINUX_REBOOT_* */
#include <linux/stat.h>
#include <linux/time.h>
/* Only the generic macros and types may be defined here. The arch-specific
* ones such as the O_RDONLY and related macros used by fcntl() and open(), or
* the layout of sys_stat_struct must not be defined here.
* ones such as the O_RDONLY and related macros used by fcntl() and open()
* must not be defined here.
*/
/* stat flags (WARNING, octal here). We need to check for an existing
@ -81,11 +83,25 @@
#define MAXPATHLEN (PATH_MAX)
#endif
/* flags for mmap */
#ifndef MAP_FAILED
#define MAP_FAILED ((void *)-1)
#endif
/* whence values for lseek() */
#define SEEK_SET 0
#define SEEK_CUR 1
#define SEEK_END 2
/* flags for reboot */
#define RB_AUTOBOOT LINUX_REBOOT_CMD_RESTART
#define RB_HALT_SYSTEM LINUX_REBOOT_CMD_HALT
#define RB_ENABLE_CAD LINUX_REBOOT_CMD_CAD_ON
#define RB_DISABLE_CAD LINUX_REBOOT_CMD_CAD_OFF
#define RB_POWER_OFF LINUX_REBOOT_CMD_POWER_OFF
#define RB_SW_SUSPEND LINUX_REBOOT_CMD_SW_SUSPEND
#define RB_KEXEC LINUX_REBOOT_CMD_KEXEC
/* Macros used on waitpid()'s return status */
#define WEXITSTATUS(status) (((status) & 0xff00) >> 8)
#define WIFEXITED(status) (((status) & 0x7f) == 0)

13
tools/include/nolibc/unistd.h
View File

@ -56,18 +56,9 @@ int tcsetpgrp(int fd, pid_t pid)
return ioctl(fd, TIOCSPGRP, &pid);
}
#define _syscall(N, ...) \
({ \
long _ret = my_syscall##N(__VA_ARGS__); \
if (_ret < 0) { \
SET_ERRNO(-_ret); \
_ret = -1; \
} \
_ret; \
})
#define _syscall_narg(...) __syscall_narg(__VA_ARGS__, 6, 5, 4, 3, 2, 1, 0)
#define __syscall_narg(_0, _1, _2, _3, _4, _5, _6, N, ...) N
#define _syscall_narg(...) __syscall_narg(__VA_ARGS__, 6, 5, 4, 3, 2, 1, 0)
#define _syscall(N, ...) __sysret(my_syscall##N(__VA_ARGS__))
#define _syscall_n(N, ...) _syscall(N, __VA_ARGS__)
#define syscall(...) _syscall_n(_syscall_narg(__VA_ARGS__), ##__VA_ARGS__)

111
tools/testing/selftests/nolibc/Makefile
View File

@ -14,6 +14,31 @@ include $(srctree)/scripts/subarch.include
ARCH = $(SUBARCH)
endif
# XARCH extends the kernel's ARCH with a few variants of the same
# architecture that only differ by the configuration, the toolchain
# and the Qemu program used. It is copied as-is into ARCH except for
# a few specific values which are mapped like this:
#
# XARCH | ARCH | config
# -------------|-----------|-------------------------
# ppc | powerpc | 32 bits
# ppc64 | powerpc | 64 bits big endian
# ppc64le | powerpc | 64 bits little endian
#
# It is recommended to only use XARCH, though it does not harm if
# ARCH is already set. For simplicity, ARCH is sufficient for all
# architectures where both are equal.
# configure default variants for target kernel supported architectures
XARCH_powerpc = ppc
XARCH = $(or $(XARCH_$(ARCH)),$(ARCH))
# map from user input variants to their kernel supported architectures
ARCH_ppc = powerpc
ARCH_ppc64 = powerpc
ARCH_ppc64le = powerpc
ARCH := $(or $(ARCH_$(XARCH)),$(XARCH))
# kernel image names by architecture
IMAGE_i386 = arch/x86/boot/bzImage
IMAGE_x86_64 = arch/x86/boot/bzImage
@ -21,10 +46,13 @@ IMAGE_x86 = arch/x86/boot/bzImage
IMAGE_arm64 = arch/arm64/boot/Image
IMAGE_arm = arch/arm/boot/zImage
IMAGE_mips = vmlinuz
IMAGE_ppc = vmlinux
IMAGE_ppc64 = vmlinux
IMAGE_ppc64le = arch/powerpc/boot/zImage
IMAGE_riscv = arch/riscv/boot/Image
IMAGE_s390 = arch/s390/boot/bzImage
IMAGE_loongarch = arch/loongarch/boot/vmlinuz.efi
IMAGE = $(IMAGE_$(ARCH))
IMAGE = $(IMAGE_$(XARCH))
IMAGE_NAME = $(notdir $(IMAGE))
# default kernel configurations that appear to be usable
@ -34,10 +62,13 @@ DEFCONFIG_x86 = defconfig
DEFCONFIG_arm64 = defconfig
DEFCONFIG_arm = multi_v7_defconfig
DEFCONFIG_mips = malta_defconfig
DEFCONFIG_ppc = pmac32_defconfig
DEFCONFIG_ppc64 = powernv_be_defconfig
DEFCONFIG_ppc64le = powernv_defconfig
DEFCONFIG_riscv = defconfig
DEFCONFIG_s390 = defconfig
DEFCONFIG_loongarch = defconfig
DEFCONFIG = $(DEFCONFIG_$(ARCH))
DEFCONFIG = $(DEFCONFIG_$(XARCH))
# optional tests to run (default = all)
TEST =
@ -49,10 +80,13 @@ QEMU_ARCH_x86 = x86_64
QEMU_ARCH_arm64 = aarch64
QEMU_ARCH_arm = arm
QEMU_ARCH_mips = mipsel # works with malta_defconfig
QEMU_ARCH_ppc = ppc
QEMU_ARCH_ppc64 = ppc64
QEMU_ARCH_ppc64le = ppc64le
QEMU_ARCH_riscv = riscv64
QEMU_ARCH_s390 = s390x
QEMU_ARCH_loongarch = loongarch64
QEMU_ARCH = $(QEMU_ARCH_$(ARCH))
QEMU_ARCH = $(QEMU_ARCH_$(XARCH))
# QEMU_ARGS : some arch-specific args to pass to qemu
QEMU_ARGS_i386 = -M pc -append "console=ttyS0,9600 i8042.noaux panic=-1 $(TEST:%=NOLIBC_TEST=%)"
@ -61,10 +95,13 @@ QEMU_ARGS_x86 = -M pc -append "console=ttyS0,9600 i8042.noaux panic=-1 $(
QEMU_ARGS_arm64 = -M virt -cpu cortex-a53 -append "panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_arm = -M virt -append "panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_mips = -M malta -append "panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_ppc = -M g3beige -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_ppc64 = -M powernv -append "console=hvc0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_ppc64le = -M powernv -append "console=hvc0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_riscv = -M virt -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_s390 = -M s390-ccw-virtio -m 1G -append "console=ttyS0 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS_loongarch = -M virt -append "console=ttyS0,115200 panic=-1 $(TEST:%=NOLIBC_TEST=%)"
QEMU_ARGS = $(QEMU_ARGS_$(ARCH)) $(QEMU_ARGS_EXTRA)
QEMU_ARGS = $(QEMU_ARGS_$(XARCH)) $(QEMU_ARGS_EXTRA)
# OUTPUT is only set when run from the main makefile, otherwise
# it defaults to this nolibc directory.
@ -76,13 +113,21 @@ else
Q=@
endif
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)
CFLAGS_s390 = -m64
CFLAGS_mips = -EL
CFLAGS_STACKPROTECTOR ?= $(call cc-option,-mstack-protector-guard=global $(call cc-option,-fstack-protector-all))
CFLAGS ?= -Os -fno-ident -fno-asynchronous-unwind-tables -std=c89 \
CFLAGS ?= -Os -fno-ident -fno-asynchronous-unwind-tables -std=c89 -W -Wall -Wextra \
$(call cc-option,-fno-stack-protector) \
$(CFLAGS_$(ARCH)) $(CFLAGS_STACKPROTECTOR)
LDFLAGS := -s
$(CFLAGS_$(XARCH)) $(CFLAGS_STACKPROTECTOR)
LDFLAGS :=
REPORT ?= awk '/\[OK\][\r]*$$/{p++} /\[FAIL\][\r]*$$/{if (!f) printf("\n"); f++; print;} /\[SKIPPED\][\r]*$$/{s++} \
END{ printf("\n%3d test(s): %3d passed, %3d skipped, %3d failed => status: ", p+s+f, p, s, f); \
if (f) printf("failure\n"); else if (s) printf("warning\n"); else printf("success\n");; \
printf("\nSee all results in %s\n", ARGV[1]); }'
help:
@echo "Supported targets under selftests/nolibc:"
@ -91,24 +136,25 @@ help:
@echo " sysroot create the nolibc sysroot here (uses \$$ARCH)"
@echo " nolibc-test build the executable (uses \$$CC and \$$CROSS_COMPILE)"
@echo " libc-test build an executable using the compiler's default libc instead"
@echo " run-user runs the executable under QEMU (uses \$$ARCH, \$$TEST)"
@echo " run-user runs the executable under QEMU (uses \$$XARCH, \$$TEST)"
@echo " initramfs prepare the initramfs with nolibc-test"
@echo " defconfig create a fresh new default config (uses \$$ARCH)"
@echo " kernel (re)build the kernel with the initramfs (uses \$$ARCH)"
@echo " run runs the kernel in QEMU after building it (uses \$$ARCH, \$$TEST)"
@echo " rerun runs a previously prebuilt kernel in QEMU (uses \$$ARCH, \$$TEST)"
@echo " defconfig create a fresh new default config (uses \$$XARCH)"
@echo " kernel (re)build the kernel with the initramfs (uses \$$XARCH)"
@echo " run runs the kernel in QEMU after building it (uses \$$XARCH, \$$TEST)"
@echo " rerun runs a previously prebuilt kernel in QEMU (uses \$$XARCH, \$$TEST)"
@echo " clean clean the sysroot, initramfs, build and output files"
@echo ""
@echo "The output file is \"run.out\". Test ranges may be passed using \$$TEST."
@echo ""
@echo "Currently using the following variables:"
@echo " ARCH = $(ARCH)"
@echo " XARCH = $(XARCH)"
@echo " CROSS_COMPILE = $(CROSS_COMPILE)"
@echo " CC = $(CC)"
@echo " OUTPUT = $(OUTPUT)"
@echo " TEST = $(TEST)"
@echo " QEMU_ARCH = $(if $(QEMU_ARCH),$(QEMU_ARCH),UNKNOWN_ARCH) [determined from \$$ARCH]"
@echo " IMAGE_NAME = $(if $(IMAGE_NAME),$(IMAGE_NAME),UNKNOWN_ARCH) [determined from \$$ARCH]"
@echo " QEMU_ARCH = $(if $(QEMU_ARCH),$(QEMU_ARCH),UNKNOWN_ARCH) [determined from \$$XARCH]"
@echo " IMAGE_NAME = $(if $(IMAGE_NAME),$(IMAGE_NAME),UNKNOWN_ARCH) [determined from \$$XARCH]"
@echo ""
all: run
@ -121,20 +167,33 @@ sysroot/$(ARCH)/include:
$(Q)$(MAKE) -C ../../../include/nolibc ARCH=$(ARCH) OUTPUT=$(CURDIR)/sysroot/ headers_standalone
$(Q)mv sysroot/sysroot sysroot/$(ARCH)
ifneq ($(NOLIBC_SYSROOT),0)
nolibc-test: nolibc-test.c sysroot/$(ARCH)/include
$(QUIET_CC)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ \
-nostdlib -static -Isysroot/$(ARCH)/include $< -lgcc
else
nolibc-test: nolibc-test.c
$(QUIET_CC)$(CC) $(CFLAGS) $(LDFLAGS) -o $@ \
-nostdlib -static -include ../../../include/nolibc/nolibc.h $< -lgcc
endif
libc-test: nolibc-test.c
$(QUIET_CC)$(CC) -o $@ $<
$(QUIET_CC)$(HOSTCC) -o $@ $<
# local libc-test
run-libc-test: libc-test
$(Q)./libc-test > "$(CURDIR)/run.out" || :
$(Q)$(REPORT) $(CURDIR)/run.out
# local nolibc-test
run-nolibc-test: nolibc-test
$(Q)./nolibc-test > "$(CURDIR)/run.out" || :
$(Q)$(REPORT) $(CURDIR)/run.out
# qemu user-land test
run-user: nolibc-test
$(Q)qemu-$(QEMU_ARCH) ./nolibc-test > "$(CURDIR)/run.out" || :
$(Q)awk '/\[OK\][\r]*$$/{p++} /\[FAIL\][\r]*$$/{f++} /\[SKIPPED\][\r]*$$/{s++} \
END{ printf("%d test(s) passed, %d skipped, %d failed.", p, s, f); \
if (s+f > 0) printf(" See all results in %s\n", ARGV[1]); else print; }' \
$(CURDIR)/run.out
$(Q)$(REPORT) $(CURDIR)/run.out
initramfs: nolibc-test
$(QUIET_MKDIR)mkdir -p initramfs
@ -150,18 +209,16 @@ kernel: initramfs
# run the tests after building the kernel
run: kernel
$(Q)qemu-system-$(QEMU_ARCH) -display none -no-reboot -kernel "$(srctree)/$(IMAGE)" -serial stdio $(QEMU_ARGS) > "$(CURDIR)/run.out"
$(Q)awk '/\[OK\][\r]*$$/{p++} /\[FAIL\][\r]*$$/{f++} /\[SKIPPED\][\r]*$$/{s++} \
END{ printf("%d test(s) passed, %d skipped, %d failed.", p, s, f); \
if (s+f > 0) printf(" See all results in %s\n", ARGV[1]); else print; }' \
$(CURDIR)/run.out
$(Q)$(REPORT) $(CURDIR)/run.out
# re-run the tests from an existing kernel
rerun:
$(Q)qemu-system-$(QEMU_ARCH) -display none -no-reboot -kernel "$(srctree)/$(IMAGE)" -serial stdio $(QEMU_ARGS) > "$(CURDIR)/run.out"
$(Q)awk '/\[OK\][\r]*$$/{p++} /\[FAIL\][\r]*$$/{f++} /\[SKIPPED\][\r]*$$/{s++} \
END{ printf("%d test(s) passed, %d skipped, %d failed.", p, s, f); \
if (s+f > 0) printf(" See all results in %s\n", ARGV[1]); else print; }' \
$(CURDIR)/run.out
$(Q)$(REPORT) $(CURDIR)/run.out
# report with existing test log
report:
$(Q)$(REPORT) $(CURDIR)/run.out
clean:
$(call QUIET_CLEAN, sysroot)

604
tools/testing/selftests/nolibc/nolibc-test.c
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