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basic: fix raw_clone() on 32-bit sparc

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The clone syscall uses the same semantics as on 64-bit. The trap number
for syscall entry is different.

Bug: https://bugs.gentoo.org/656368
This commit is contained in:
Mike Gilbert 2018-05-24 10:48:55 -04:00 committed by Lennart Poettering
parent cdc0f9be92
commit e4aa2c34d5
1 changed files with 6 additions and 2 deletions
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8
src/basic/raw-clone.h
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@ -39,10 +39,10 @@ static inline pid_t raw_clone(unsigned long flags) {
/* On s390/s390x and cris the order of the first and second arguments
* of the raw clone() system call is reversed. */
ret = (pid_t) syscall(__NR_clone, NULL, flags);
#elif defined(__sparc__) && defined(__arch64__)
#elif defined(__sparc__)
{
/**
* sparc64 always returns the other process id in %o0, and
* sparc always returns the other process id in %o0, and
* a boolean flag whether this is the child or the parent in
* %o1. Inline assembly is needed to get the flag returned
* in %o1.
@ -52,7 +52,11 @@ static inline pid_t raw_clone(unsigned long flags) {
asm volatile("mov %2, %%g1\n\t"
"mov %3, %%o0\n\t"
"mov 0 , %%o1\n\t"
#if defined(__arch64__)
"t 0x6d\n\t"
#else
"t 0x10\n\t"
#endif
"mov %%o1, %0\n\t"
"mov %%o0, %1" :
"=r"(in_child), "=r"(child_pid) :