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| author | Markus Gutschke <markus@google.com> | 2006-03-23 02:59:56 -0800 |
|---|---|---|
| committer | Linus Torvalds <torvalds@g5.osdl.org> | 2006-03-23 07:38:07 -0800 |
| commit | aeefc956d5d8f8402216a5447bd72ade9eb37eff (patch) | |
| tree | 982c643fe5288bc3228e3237eaab9e4406b811c1 /include/asm-i386/unistd.h | |
| parent | 905c399594f85322a4e513a4b0365b70d6de9fd0 (diff) | |
| download | lwn-aeefc956d5d8f8402216a5447bd72ade9eb37eff.tar.gz lwn-aeefc956d5d8f8402216a5447bd72ade9eb37eff.zip | |
[PATCH] x86: Make _syscallX() macros compile in PIC mode
Gcc reserves %ebx when compiling position-independent-code on i386. This
means, the _syscallX() macros in include/asm-i386/unistd.h will not
compile. This patch is changes the existing macros to take special care to
preserve %ebx.
The bug can be tracked at http://bugzilla.kernel.org/show_bug.cgi?id=6204
Signed-off-by: Markus Gutschke <markus@google.com>
Signed-off-by: Andrew Morton <akpm@osdl.org>
Signed-off-by: Linus Torvalds <torvalds@osdl.org>
Diffstat (limited to 'include/asm-i386/unistd.h')
| -rw-r--r-- | include/asm-i386/unistd.h | 36 |
1 files changed, 21 insertions, 15 deletions
diff --git a/include/asm-i386/unistd.h b/include/asm-i386/unistd.h index dc81a55dd94d..d8afd0e3b81a 100644 --- a/include/asm-i386/unistd.h +++ b/include/asm-i386/unistd.h @@ -347,9 +347,9 @@ __syscall_return(type,__res); \ type name(type1 arg1) \ { \ long __res; \ -__asm__ volatile ("int $0x80" \ +__asm__ volatile ("push %%ebx ; movl %2,%%ebx ; int $0x80 ; pop %%ebx" \ : "=a" (__res) \ - : "0" (__NR_##name),"b" ((long)(arg1)) : "memory"); \ + : "0" (__NR_##name),"ri" ((long)(arg1)) : "memory"); \ __syscall_return(type,__res); \ } @@ -357,9 +357,10 @@ __syscall_return(type,__res); \ type name(type1 arg1,type2 arg2) \ { \ long __res; \ -__asm__ volatile ("int $0x80" \ +__asm__ volatile ("push %%ebx ; movl %2,%%ebx ; int $0x80 ; pop %%ebx" \ : "=a" (__res) \ - : "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)) : "memory"); \ + : "0" (__NR_##name),"ri" ((long)(arg1)),"c" ((long)(arg2)) \ + : "memory"); \ __syscall_return(type,__res); \ } @@ -367,9 +368,9 @@ __syscall_return(type,__res); \ type name(type1 arg1,type2 arg2,type3 arg3) \ { \ long __res; \ -__asm__ volatile ("int $0x80" \ +__asm__ volatile ("push %%ebx ; movl %2,%%ebx ; int $0x80 ; pop %%ebx" \ : "=a" (__res) \ - : "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \ + : "0" (__NR_##name),"ri" ((long)(arg1)),"c" ((long)(arg2)), \ "d" ((long)(arg3)) : "memory"); \ __syscall_return(type,__res); \ } @@ -378,9 +379,9 @@ __syscall_return(type,__res); \ type name (type1 arg1, type2 arg2, type3 arg3, type4 arg4) \ { \ long __res; \ -__asm__ volatile ("int $0x80" \ +__asm__ volatile ("push %%ebx ; movl %2,%%ebx ; int $0x80 ; pop %%ebx" \ : "=a" (__res) \ - : "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \ + : "0" (__NR_##name),"ri" ((long)(arg1)),"c" ((long)(arg2)), \ "d" ((long)(arg3)),"S" ((long)(arg4)) : "memory"); \ __syscall_return(type,__res); \ } @@ -390,10 +391,12 @@ __syscall_return(type,__res); \ type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5) \ { \ long __res; \ -__asm__ volatile ("int $0x80" \ +__asm__ volatile ("push %%ebx ; movl %2,%%ebx ; movl %1,%%eax ; " \ + "int $0x80 ; pop %%ebx" \ : "=a" (__res) \ - : "0" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \ - "d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5)) : "memory"); \ + : "i" (__NR_##name),"ri" ((long)(arg1)),"c" ((long)(arg2)), \ + "d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5)) \ + : "memory"); \ __syscall_return(type,__res); \ } @@ -402,11 +405,14 @@ __syscall_return(type,__res); \ type name (type1 arg1,type2 arg2,type3 arg3,type4 arg4,type5 arg5,type6 arg6) \ { \ long __res; \ -__asm__ volatile ("push %%ebp ; movl %%eax,%%ebp ; movl %1,%%eax ; int $0x80 ; pop %%ebp" \ + struct { long __a1; long __a6; } __s = { (long)arg1, (long)arg6 }; \ +__asm__ volatile ("push %%ebp ; push %%ebx ; movl 4(%2),%%ebp ; " \ + "movl 0(%2),%%ebx ; movl %1,%%eax ; int $0x80 ; " \ + "pop %%ebx ; pop %%ebp" \ : "=a" (__res) \ - : "i" (__NR_##name),"b" ((long)(arg1)),"c" ((long)(arg2)), \ - "d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5)), \ - "0" ((long)(arg6)) : "memory"); \ + : "i" (__NR_##name),"0" ((long)(&__s)),"c" ((long)(arg2)), \ + "d" ((long)(arg3)),"S" ((long)(arg4)),"D" ((long)(arg5)) \ + : "memory"); \ __syscall_return(type,__res); \ } |