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5db475f0b9
on all mips variants, Linux did (and maybe still does) have some syscall return paths that wrongly return both the error flag in r7 and a negated error code in r2. in particular this happened for at least some causes of ENOSYS. add an extra check to only negate the error code if it's positive to begin with. bug report and concept for patch by Andreas Dröscher.
131 lines
3.4 KiB
C
131 lines
3.4 KiB
C
#define __SYSCALL_LL_E(x) (x)
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#define __SYSCALL_LL_O(x) (x)
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#define SYSCALL_RLIM_INFINITY (-1UL/2)
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#if __mips_isa_rev >= 6
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#define SYSCALL_CLOBBERLIST \
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"$1", "$3", "$10", "$11", "$12", "$13", \
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"$14", "$15", "$24", "$25", "memory"
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#else
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#define SYSCALL_CLOBBERLIST \
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"$1", "$3", "$10", "$11", "$12", "$13", \
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"$14", "$15", "$24", "$25", "hi", "lo", "memory"
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#endif
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static inline long __syscall0(long n)
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{
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register long r7 __asm__("$7");
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register long r2 __asm__("$2");
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__asm__ __volatile__ (
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"daddu $2,$0,%2 ; syscall"
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: "=&r"(r2), "=r"(r7)
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: "ir"(n), "0"(r2)
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: SYSCALL_CLOBBERLIST);
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return r7 && r2>0 ? -r2 : r2;
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}
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static inline long __syscall1(long n, long a)
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{
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register long r4 __asm__("$4") = a;
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register long r7 __asm__("$7");
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register long r2 __asm__("$2");
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__asm__ __volatile__ (
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"daddu $2,$0,%2 ; syscall"
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: "=&r"(r2), "=r"(r7)
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: "ir"(n), "0"(r2), "r"(r4)
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: SYSCALL_CLOBBERLIST);
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return r7 && r2>0 ? -r2 : r2;
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}
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static inline long __syscall2(long n, long a, long b)
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{
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register long r4 __asm__("$4") = a;
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register long r5 __asm__("$5") = b;
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register long r7 __asm__("$7");
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register long r2 __asm__("$2");
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__asm__ __volatile__ (
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"daddu $2,$0,%2 ; syscall"
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: "=&r"(r2), "=r"(r7)
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: "ir"(n), "0"(r2), "r"(r4), "r"(r5)
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: SYSCALL_CLOBBERLIST);
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return r7 && r2>0 ? -r2 : r2;
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}
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static inline long __syscall3(long n, long a, long b, long c)
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{
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register long r4 __asm__("$4") = a;
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register long r5 __asm__("$5") = b;
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register long r6 __asm__("$6") = c;
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register long r7 __asm__("$7");
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register long r2 __asm__("$2");
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__asm__ __volatile__ (
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"daddu $2,$0,%2 ; syscall"
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: "=&r"(r2), "=r"(r7)
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: "ir"(n), "0"(r2), "r"(r4), "r"(r5), "r"(r6)
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: SYSCALL_CLOBBERLIST);
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return r7 && r2>0 ? -r2 : r2;
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}
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static inline long __syscall4(long n, long a, long b, long c, long d)
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{
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register long r4 __asm__("$4") = a;
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register long r5 __asm__("$5") = b;
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register long r6 __asm__("$6") = c;
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register long r7 __asm__("$7") = d;
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register long r2 __asm__("$2");
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__asm__ __volatile__ (
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"daddu $2,$0,%2 ; syscall"
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: "=&r"(r2), "+r"(r7)
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: "ir"(n), "0"(r2), "r"(r4), "r"(r5), "r"(r6)
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: SYSCALL_CLOBBERLIST);
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return r7 && r2>0 ? -r2 : r2;
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}
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static inline long __syscall5(long n, long a, long b, long c, long d, long e)
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{
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register long r4 __asm__("$4") = a;
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register long r5 __asm__("$5") = b;
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register long r6 __asm__("$6") = c;
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register long r7 __asm__("$7") = d;
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register long r8 __asm__("$8") = e;
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register long r2 __asm__("$2");
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__asm__ __volatile__ (
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"daddu $2,$0,%2 ; syscall"
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: "=&r"(r2), "+r"(r7)
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: "ir"(n), "0"(r2), "r"(r4), "r"(r5), "r"(r6), "r"(r8)
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: SYSCALL_CLOBBERLIST);
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return r7 && r2>0 ? -r2 : r2;
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}
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static inline long __syscall6(long n, long a, long b, long c, long d, long e, long f)
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{
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register long r4 __asm__("$4") = a;
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register long r5 __asm__("$5") = b;
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register long r6 __asm__("$6") = c;
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register long r7 __asm__("$7") = d;
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register long r8 __asm__("$8") = e;
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register long r9 __asm__("$9") = f;
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register long r2 __asm__("$2");
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__asm__ __volatile__ (
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"daddu $2,$0,%2 ; syscall"
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: "=&r"(r2), "+r"(r7)
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: "ir"(n), "0"(r2), "r"(r4), "r"(r5), "r"(r6), "r"(r8), "r"(r9)
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: SYSCALL_CLOBBERLIST);
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return r7 && r2>0 ? -r2 : r2;
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}
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#define VDSO_USEFUL
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#define VDSO_CGT32_SYM "__vdso_clock_gettime"
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#define VDSO_CGT32_VER "LINUX_2.6"
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#define VDSO_CGT_SYM "__vdso_clock_gettime64"
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#define VDSO_CGT_VER "LINUX_2.6"
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#define SO_SNDTIMEO_OLD 0x1005
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#define SO_RCVTIMEO_OLD 0x1006
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