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@@ -1,128 +1,144 @@
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#ifndef _BITS_SYSCALLS_H
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#define _BITS_SYSCALLS_H
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+
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#ifndef _SYSCALL_H
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# error "Never use <bits/syscalls.h> directly; include <sys/syscall.h> instead."
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#endif
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/*
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- Some of the sneaky macros in the code were taken from
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- glibc-2.2.5/sysdeps/unix/sysv/linux/i386/sysdep.h
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-*/
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+ * Some of the sneaky macros in the code were taken from
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+ * glibc-2.2.5/sysdeps/unix/sysv/linux/i386/sysdep.h
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+ */
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#ifndef __ASSEMBLER__
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#include <errno.h>
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-/* We need some help from the assembler to generate optimal code. We
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- define some macros here which later will be used. */
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+/* We need some help from the assembler to generate optimal code.
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+ * We define some macros here which later will be used. */
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-#if defined __SUPPORT_LD_DEBUG__ && defined __DOMULTI__
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+#if defined __SUPPORT_LD_DEBUG__ && defined __DOMULTI__
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#error LD debugging and DOMULTI are incompatible
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#endif
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#ifdef __DOMULTI__
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-__asm__ (".L__X'%ebx = 1\n\t"
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- ".L__X'%ecx = 2\n\t"
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- ".L__X'%edx = 2\n\t"
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- ".L__X'%eax = 3\n\t"
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- ".L__X'%esi = 3\n\t"
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- ".L__X'%edi = 3\n\t"
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- ".L__X'%ebp = 3\n\t"
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- ".L__X'%esp = 3\n\t"
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- ".ifndef _BITS_SYSCALLS_ASM\n\t"
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- ".set _BITS_SYSCALLS_ASM,1\n\t"
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- ".macro bpushl name reg\n\t"
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- ".if 1 - \\name\n\t"
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- ".if 2 - \\name\n\t"
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- "pushl %ebx\n\t"
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- ".else\n\t"
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- "xchgl \\reg, %ebx\n\t"
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- ".endif\n\t"
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- ".endif\n\t"
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- ".endm\n\t"
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- ".macro bpopl name reg\n\t"
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- ".if 1 - \\name\n\t"
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- ".if 2 - \\name\n\t"
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- "popl %ebx\n\t"
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- ".else\n\t"
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- "xchgl \\reg, %ebx\n\t"
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- ".endif\n\t"
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- ".endif\n\t"
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- ".endm\n\t"
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- ".macro bmovl name reg\n\t"
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- ".if 1 - \\name\n\t"
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- ".if 2 - \\name\n\t"
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- "movl \\reg, %ebx\n\t"
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- ".endif\n\t"
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- ".endif\n\t"
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- ".endm\n\t"
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- ".endif\n\t");
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+__asm__ (
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+ ".L__X'%ebx = 1\n\t"
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+ ".L__X'%ecx = 2\n\t"
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+ ".L__X'%edx = 2\n\t"
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+ ".L__X'%eax = 3\n\t"
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+ ".L__X'%esi = 3\n\t"
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+ ".L__X'%edi = 3\n\t"
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+ ".L__X'%ebp = 3\n\t"
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+ ".L__X'%esp = 3\n\t"
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+
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+ ".ifndef _BITS_SYSCALLS_ASM\n\t"
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+ ".set _BITS_SYSCALLS_ASM,1\n\t"
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+
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+ /* Loading param #1 (ebx) is done by loading it into
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+ * another register, and then performing bpushl+bmovl,
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+ * since we must preserve ebx */
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+
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+ ".macro bpushl name reg\n\t"
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+ ".if 1 - \\name\n\t" /* if reg!=ebx... */
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+ ".if 2 - \\name\n\t" /* if reg can't be clobbered... */
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+ "pushl %ebx\n\t" /* save ebx on stack */
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+ ".else\n\t"
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+ "xchgl \\reg, %ebx\n\t" /* else save ebx in reg, and load reg to ebx */
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+ ".endif\n\t"
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+ ".endif\n\t"
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+ ".endm\n\t"
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+
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+ ".macro bmovl name reg\n\t"
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+ ".if 1 - \\name\n\t"
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+ ".if 2 - \\name\n\t" /* if reg can't be clobbered... */
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+ "movl \\reg, %ebx\n\t" /* load reg to ebx */
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+ ".endif\n\t"
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+ ".endif\n\t"
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+ ".endm\n\t"
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+
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+ ".endif\n\t" /* _BITS_SYSCALLS_ASM */
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+
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+ ".macro bpopl name reg\n\t"
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+ ".if 1 - \\name\n\t"
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+ ".if 2 - \\name\n\t" /* if reg can't be clobbered... */
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+ "popl %ebx\n\t" /* restore ebx from stack */
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+ ".else\n\t"
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+ "xchgl \\reg, %ebx\n\t" /* else restore ebx from reg */
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+ ".endif\n\t"
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+ ".endif\n\t"
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+ ".endm\n\t"
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+);
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#else
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-__asm__ (".L__X'%ebx = 1\n\t"
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- ".L__X'%ecx = 2\n\t"
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- ".L__X'%edx = 2\n\t"
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- ".L__X'%eax = 3\n\t"
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- ".L__X'%esi = 3\n\t"
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- ".L__X'%edi = 3\n\t"
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- ".L__X'%ebp = 3\n\t"
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- ".L__X'%esp = 3\n\t"
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- ".macro bpushl name reg\n\t"
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- ".if 1 - \\name\n\t"
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- ".if 2 - \\name\n\t"
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- "pushl %ebx\n\t"
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- ".else\n\t"
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- "xchgl \\reg, %ebx\n\t"
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- ".endif\n\t"
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- ".endif\n\t"
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- ".endm\n\t"
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- ".macro bpopl name reg\n\t"
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- ".if 1 - \\name\n\t"
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- ".if 2 - \\name\n\t"
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- "popl %ebx\n\t"
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- ".else\n\t"
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- "xchgl \\reg, %ebx\n\t"
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- ".endif\n\t"
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- ".endif\n\t"
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- ".endm\n\t"
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- ".macro bmovl name reg\n\t"
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- ".if 1 - \\name\n\t"
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- ".if 2 - \\name\n\t"
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- "movl \\reg, %ebx\n\t"
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- ".endif\n\t"
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- ".endif\n\t"
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- ".endm\n\t");
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+__asm__ (
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+ ".L__X'%ebx = 1\n\t"
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+ ".L__X'%ecx = 2\n\t"
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+ ".L__X'%edx = 2\n\t"
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+ ".L__X'%eax = 3\n\t"
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+ ".L__X'%esi = 3\n\t"
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+ ".L__X'%edi = 3\n\t"
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+ ".L__X'%ebp = 3\n\t"
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+ ".L__X'%esp = 3\n\t"
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+
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+ ".macro bpushl name reg\n\t"
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+ ".if 1 - \\name\n\t"
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+ ".if 2 - \\name\n\t"
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+ "pushl %ebx\n\t"
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+ ".else\n\t"
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+ "xchgl \\reg, %ebx\n\t"
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+ ".endif\n\t"
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+ ".endif\n\t"
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+ ".endm\n\t"
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+
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+ ".macro bmovl name reg\n\t"
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+ ".if 1 - \\name\n\t"
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+ ".if 2 - \\name\n\t"
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+ "movl \\reg, %ebx\n\t"
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+ ".endif\n\t"
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+ ".endif\n\t"
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+ ".endm\n\t"
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+
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+ ".macro bpopl name reg\n\t"
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+ ".if 1 - \\name\n\t"
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+ ".if 2 - \\name\n\t"
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+ "popl %ebx\n\t"
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+ ".else\n\t"
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+ "xchgl \\reg, %ebx\n\t"
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+ ".endif\n\t"
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+ ".endif\n\t"
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+ ".endm\n\t"
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+);
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#endif
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#define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \
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- ({ \
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- register unsigned int resultvar; \
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- __asm__ __volatile__ ( \
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- LOADARGS_##nr \
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- "movl %1, %%eax\n\t" \
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- "int $0x80\n\t" \
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- RESTOREARGS_##nr \
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- : "=a" (resultvar) \
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- : "i" (name) ASMFMT_##nr(args) : "memory", "cc"); \
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- (int) resultvar; })
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+({ \
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+ register unsigned int resultvar; \
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+ __asm__ __volatile__ ( \
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+ LOADARGS_##nr \
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+ "movl %1, %%eax\n\t" \
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+ "int $0x80\n\t" \
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+ RESTOREARGS_##nr \
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+ : "=a" (resultvar) \
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+ : "i" (name) ASMFMT_##nr(args) : "memory", "cc" \
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+ ); \
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+ (int) resultvar; \
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+})
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#define LOADARGS_0
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-#define LOADARGS_1 \
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- "bpushl .L__X'%k2, %k2\n\t" \
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- "bmovl .L__X'%k2, %k2\n\t"
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-#define LOADARGS_2 LOADARGS_1
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-#define LOADARGS_3 LOADARGS_1
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-#define LOADARGS_4 LOADARGS_1
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-#define LOADARGS_5 LOADARGS_1
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-#define LOADARGS_6 LOADARGS_1 "push %%ebp ; movl %7, %%ebp\n\t"
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+#define LOADARGS_1 "bpushl .L__X'%k2, %k2\n\t" "bmovl .L__X'%k2, %k2\n\t"
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+#define LOADARGS_2 LOADARGS_1
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+#define LOADARGS_3 LOADARGS_1
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+#define LOADARGS_4 LOADARGS_1
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+#define LOADARGS_5 LOADARGS_1
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+#define LOADARGS_6 LOADARGS_1 "push %%ebp\n\t" "movl %7, %%ebp\n\t"
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#define RESTOREARGS_0
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-#define RESTOREARGS_1 \
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- "bpopl .L__X'%k2, %k2\n\t"
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-#define RESTOREARGS_2 RESTOREARGS_1
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-#define RESTOREARGS_3 RESTOREARGS_1
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-#define RESTOREARGS_4 RESTOREARGS_1
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-#define RESTOREARGS_5 RESTOREARGS_1
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-#define RESTOREARGS_6 "pop %%ebp\n\t" RESTOREARGS_1
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+#define RESTOREARGS_1 "bpopl .L__X'%k2, %k2\n\t"
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+#define RESTOREARGS_2 RESTOREARGS_1
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+#define RESTOREARGS_3 RESTOREARGS_1
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+#define RESTOREARGS_4 RESTOREARGS_1
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+#define RESTOREARGS_5 RESTOREARGS_1
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+#define RESTOREARGS_6 "pop %%ebp\n\t" RESTOREARGS_1
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#define ASMFMT_0()
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#define ASMFMT_1(arg1) \
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