diff options
| author | Denys Vlasenko <vda.linux@googlemail.com> | 2010-04-06 05:32:09 +0200 |
|---|---|---|
| committer | Denys Vlasenko <vda.linux@googlemail.com> | 2010-04-06 05:32:09 +0200 |
| commit | dbdd8b059520baa371de611a21d7d1a2b250b250 (patch) | |
| tree | 0e0467729c7c4725e1629d5312a0a3af95fe5cd7 /libc/sysdeps | |
| parent | d82f29cd593e371acb3a6f11656543cf2e6e2421 (diff) | |
i386/bits/syscalls.h: explain _BITS_SYSCALLS_ASM
Signed-off-by: Denys Vlasenko <vda.linux@googlemail.com>
Diffstat (limited to 'libc/sysdeps')
| -rw-r--r-- | libc/sysdeps/linux/i386/bits/syscalls.h | 54 |
1 files changed, 9 insertions, 45 deletions
diff --git a/libc/sysdeps/linux/i386/bits/syscalls.h b/libc/sysdeps/linux/i386/bits/syscalls.h index a6e26d7ec..09d48a2ff 100644 --- a/libc/sysdeps/linux/i386/bits/syscalls.h +++ b/libc/sysdeps/linux/i386/bits/syscalls.h @@ -21,8 +21,13 @@ #error LD debugging and DOMULTI are incompatible #endif -#ifdef __DOMULTI__ __asm__ ( +#ifdef __DOMULTI__ + /* Protect against asm macro redefinition (happens in __DOMULTI__ mode). + * Unfortunately, it ends up visible in .o files. */ + ".ifndef _BITS_SYSCALLS_ASM\n\t" + ".set _BITS_SYSCALLS_ASM,1\n\t" +#endif ".L__X'%ebx = 1\n\t" ".L__X'%ecx = 2\n\t" ".L__X'%edx = 2\n\t" @@ -32,9 +37,6 @@ __asm__ ( ".L__X'%ebp = 3\n\t" ".L__X'%esp = 3\n\t" - ".ifndef _BITS_SYSCALLS_ASM\n\t" - ".set _BITS_SYSCALLS_ASM,1\n\t" - /* Loading param #1 (ebx) is done by loading it into * another register, and then performing bpushl+bmovl, * since we must preserve ebx */ @@ -57,8 +59,6 @@ __asm__ ( ".endif\n\t" ".endm\n\t" - ".endif\n\t" /* _BITS_SYSCALLS_ASM */ - ".macro bpopl name reg\n\t" ".if 1 - \\name\n\t" ".if 2 - \\name\n\t" /* if reg can't be clobbered... */ @@ -68,47 +68,11 @@ __asm__ ( ".endif\n\t" ".endif\n\t" ".endm\n\t" -); -#else -__asm__ ( - ".L__X'%ebx = 1\n\t" - ".L__X'%ecx = 2\n\t" - ".L__X'%edx = 2\n\t" - ".L__X'%eax = 3\n\t" - ".L__X'%esi = 3\n\t" - ".L__X'%edi = 3\n\t" - ".L__X'%ebp = 3\n\t" - ".L__X'%esp = 3\n\t" - ".macro bpushl name reg\n\t" - ".if 1 - \\name\n\t" - ".if 2 - \\name\n\t" - "pushl %ebx\n\t" - ".else\n\t" - "xchgl \\reg, %ebx\n\t" - ".endif\n\t" - ".endif\n\t" - ".endm\n\t" - - ".macro bmovl name reg\n\t" - ".if 1 - \\name\n\t" - ".if 2 - \\name\n\t" - "movl \\reg, %ebx\n\t" - ".endif\n\t" - ".endif\n\t" - ".endm\n\t" - - ".macro bpopl name reg\n\t" - ".if 1 - \\name\n\t" - ".if 2 - \\name\n\t" - "popl %ebx\n\t" - ".else\n\t" - "xchgl \\reg, %ebx\n\t" - ".endif\n\t" - ".endif\n\t" - ".endm\n\t" -); +#ifdef __DOMULTI__ + ".endif\n\t" /* _BITS_SYSCALLS_ASM */ #endif +); #define INTERNAL_SYSCALL_NCS(name, err, nr, args...) \ ({ \ |