tools/nolibc: use C89 comment syntax (fddc8f81) · Commits · EulixOS / Software / Kernel

tools/include/nolibc/arch-aarch64.h

+16 −16

Original line number	Diff line number	Diff line
		@@ -176,24 +176,24 @@ const unsigned long *_auxv __attribute__((weak));
		void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) _start(void)
		{
		__asm__ volatile (
		"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)
		"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) = 8argc ... /
		"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
		"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"
		);
		__builtin_unreachable();
		}
		#endif // _NOLIBC_ARCH_AARCH64_H
		#endif /* _NOLIBC_ARCH_AARCH64_H */

tools/include/nolibc/arch-arm.h

+22 −22

Original line number	Diff line number	Diff line
		@@ -203,34 +203,34 @@ const unsigned long *_auxv __attribute__((weak));
		void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) _start(void)
		{
		__asm__ volatile (
		"pop {%r0}\n" // argc was in the stack
		"mov %r1, %sp\n" // argv = sp
		"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
		"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)
		"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
		"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
		"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" //
		"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
		"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
		".align 2\n" /* below are the pointers to a few variables */
		"1:\n"
		".word environ\n"
		"2:\n"
		@@ -239,4 +239,4 @@ void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) _start(void)
		__builtin_unreachable();
		}

		#endif // _NOLIBC_ARCH_ARM_H
		#endif /* _NOLIBC_ARCH_ARM_H */

tools/include/nolibc/arch-i386.h

+20 −20

Original line number	Diff line number	Diff line
		@@ -194,31 +194,31 @@ void __attribute__((weak,noreturn,optimize("omit-frame-pointer"),no_stack_protec
		{
		__asm__ volatile (
		#ifdef NOLIBC_STACKPROTECTOR
		"call __stack_chk_init\n" // initialize stack protector
		"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)
		"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)
		"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
		"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
		"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 */
		);
		__builtin_unreachable();
		}

		#endif // _NOLIBC_ARCH_I386_H
		#endif /* _NOLIBC_ARCH_I386_H */

tools/include/nolibc/arch-loongarch.h

+19 −19

Original line number	Diff line number	Diff line
		@@ -158,7 +158,7 @@ const unsigned long *_auxv __attribute__((weak));
		#define LONG_ADDI "addi.w"
		#define LONG_SLL "slli.w"
		#define LONG_BSTRINS "bstrins.w"
		#else // __loongarch_grlen == 64
		#else /* __loongarch_grlen == 64 */
		#define LONGLOG "3"
		#define SZREG "8"
		#define REG_L "ld.d"
		@@ -173,28 +173,28 @@ const unsigned long *_auxv __attribute__((weak));
		void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) _start(void)
		{
		__asm__ volatile (
		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
		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) = SZREGargc ... /
		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
		"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
		"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"
		);
		__builtin_unreachable();
		}

		#endif // _NOLIBC_ARCH_LOONGARCH_H
		#endif /* _NOLIBC_ARCH_LOONGARCH_H */

tools/include/nolibc/arch-mips.h

+28 −28

Original line number	Diff line number	Diff line
		@@ -183,42 +183,42 @@ const unsigned long *_auxv __attribute__((weak));
		void __attribute__((weak,noreturn,optimize("omit-frame-pointer"))) __start(void)
		{
		__asm__ volatile (
		//".set nomips16\n"
		/".set nomips16\n"/
		".set push\n"
		".set noreorder\n"
		".option pic0\n"
		//".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
		/".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 + 4argc ... /
		"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
		"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"
		/".end __start\n"/
		".set pop\n"
		);
		__builtin_unreachable();
		}

		#endif // _NOLIBC_ARCH_MIPS_H
		#endif /* _NOLIBC_ARCH_MIPS_H */