diff options
Diffstat (limited to 'elksemu/elks_signal.c')
-rw-r--r-- | elksemu/elks_signal.c | 36 |
1 files changed, 36 insertions, 0 deletions
diff --git a/elksemu/elks_signal.c b/elksemu/elks_signal.c new file mode 100644 index 0000000..2bf1e55 --- /dev/null +++ b/elksemu/elks_signal.c @@ -0,0 +1,36 @@ + +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> +#include <fcntl.h> +#include <signal.h> +#include <sys/stat.h> +#include <sys/vm86.h> +#include "elks.h" + +static int elks_sigtrap= -1; + +void sig_trap(int signo) +{ + elks_cpu.regs.esp -= 2; + ELKS_POKE(unsigned short, elks_cpu.regs.esp, signo); + elks_cpu.regs.esp -= 2; + ELKS_POKE(unsigned short, elks_cpu.regs.esp, elks_cpu.regs.eip); + elks_cpu.regs.eip = elks_sigtrap; +} + +int elks_signal(int bx,int cx,int dx,int di,int si) +{ + int rv; + if( bx < 0 || bx >= NSIG ) { errno = EINVAL; return -1; } + if( cx == 0 ) rv = (signal(bx, SIG_DFL) == SIG_ERR); + else if( cx == 1 ) rv = (signal(bx, SIG_IGN) == SIG_ERR); + else + { + elks_sigtrap = cx; + rv = (signal(bx, sig_trap) == SIG_ERR); + } + + return -rv; +} |