diff options
Diffstat (limited to 'libc/sys.c')
| -rw-r--r-- | libc/sys.c | 20 |
1 files changed, 14 insertions, 6 deletions
@@ -2,6 +2,7 @@ // Syscall implementation #include <arg.h> +#include <errno.h> #include <sys.h> #if defined(userspace) @@ -10,25 +11,32 @@ * Definitions */ +#define ERRIFY(ret) \ + if (ret < 0) { \ + errno = -ret; \ + return -1; \ + } \ + return ret + int sys0(enum sys num) { int a; __asm__ volatile("int $0x80" : "=a"(a) : "0"(num)); - return a; + ERRIFY(a); } int sys1(enum sys num, int d1) { int a; __asm__ volatile("int $0x80" : "=a"(a) : "0"(num), "b"((int)d1)); - return a; + ERRIFY(a); } int sys2(enum sys num, int d1, int d2) { int a; __asm__ volatile("int $0x80" : "=a"(a) : "0"(num), "b"((int)d1), "c"((int)d2)); - return a; + ERRIFY(a); } int sys3(enum sys num, int d1, int d2, int d3) @@ -37,7 +45,7 @@ int sys3(enum sys num, int d1, int d2, int d3) __asm__ volatile("int $0x80" : "=a"(a) : "0"(num), "b"((int)d1), "c"((int)d2), "d"((int)d3)); - return a; + ERRIFY(a); } int sys4(enum sys num, int d1, int d2, int d3, int d4) @@ -46,7 +54,7 @@ int sys4(enum sys num, int d1, int d2, int d3, int d4) __asm__ volatile("int $0x80" : "=a"(a) : "0"(num), "b"((int)d1), "c"((int)d2), "d"((int)d3), "S"((int)d4)); - return a; + ERRIFY(a); } int sys5(enum sys num, int d1, int d2, int d3, int d4, int d5) @@ -56,7 +64,7 @@ int sys5(enum sys num, int d1, int d2, int d3, int d4, int d5) : "=a"(a) : "0"(num), "b"((int)d1), "c"((int)d2), "d"((int)d3), "S"((int)d4), "D"((int)d5)); - return a; + ERRIFY(a); } int sysv(enum sys num, ...) |