riscv64: inline raise.
Not necessary (as demonstrated by the lack of this for x86), but this
saves one stack frame in aborts, which gets you one more useful stack
frame in logs and clustering etc, which improves your chances of finding
your bug.
Test: crasher64 abort
Change-Id: Ieb214f3b46520161edc1e53c0d766353b777d8ba
diff --git a/libc/private/bionic_inline_raise.h b/libc/private/bionic_inline_raise.h
index 8565c80..82a564d 100644
--- a/libc/private/bionic_inline_raise.h
+++ b/libc/private/bionic_inline_raise.h
@@ -60,6 +60,13 @@
register long x3 __asm__("x3") = reinterpret_cast<long>(&info);
register long x8 __asm__("x8") = __NR_rt_tgsigqueueinfo;
__asm__("svc #0" : "=r"(x0) : "r"(x0), "r"(x1), "r"(x2), "r"(x3), "r"(x8) : "memory");
+#elif defined(__riscv)
+ register long a0 __asm__("a0") = pid;
+ register long a1 __asm__("a1") = tid;
+ register long a2 __asm__("a2") = sig;
+ register long a3 __asm__("a3") = reinterpret_cast<long>(&info);
+ register long a7 __asm__("a7") = __NR_rt_tgsigqueueinfo;
+ __asm__("ecall" : "=r"(a0) : "r"(a0), "r"(a1), "r"(a2), "r"(a3), "r"(a7) : "memory");
#elif defined(__x86_64__)
register long rax __asm__("rax") = __NR_rt_tgsigqueueinfo;
register long rdi __asm__("rdi") = pid;