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RISC-V: Fix _sbrk, it's failed only when return value is -1. 

Signed-off-by: Kito Cheng <kito.cheng@gmail.com>
This commit is contained in:
Denis Ivanov 2018-07-06 19:03:23 +03:00 committed by Corinna Vinschen
parent 258996b696
commit 9e032fd939
2 changed files with 12 additions and 7 deletions
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11
libgloss/riscv/internal_syscall.h
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@ -40,13 +40,18 @@ __internal_syscall(long n, long _a0, long _a1, long _a2, long _a3, long _a4, lon
asm volatile ("scall"
: "+r"(a0) : "r"(a1), "r"(a2), "r"(a3), "r"(a4), "r"(a5), "r"(syscall_id));
return a0;
}
static inline long
syscall_errno(long n, long _a0, long _a1, long _a2, long _a3, long _a4, long _a5)
{
long a0 = __internal_syscall (n, _a0, _a1, _a2, _a3, _a4, _a5);
if (a0 < 0)
return __syscall_error (a0);
else
return a0;
}
#define syscall_errno(n, a, b, c, d, e, f) \
__internal_syscall(n, (long)(a), (long)(b), (long)(c), (long)(d), (long)(e), (long)(f))
#endif

8
libgloss/riscv/sys_sbrk.c
View File

@ -41,14 +41,14 @@ _sbrk(ptrdiff_t incr)
if (heap_end == 0)
{
long brk = syscall_errno (SYS_brk, 0, 0, 0, 0, 0, 0);
long brk = __internal_syscall (SYS_brk, 0, 0, 0, 0, 0, 0);
if (brk == -1)
return (void *)-1;
return (void *)__syscall_error (-ENOMEM);
heap_end = brk;
}
if (syscall_errno (SYS_brk, heap_end + incr, 0, 0, 0, 0, 0) != heap_end + incr)
return (void *)-1;
if (__internal_syscall (SYS_brk, heap_end + incr, 0, 0, 0, 0, 0) != heap_end + incr)
return (void *)__syscall_error (-ENOMEM);
heap_end += incr;
return (void *)(heap_end - incr);