diff options
Diffstat (limited to 'linux-user/arm-semi.c')
| -rw-r--r-- | linux-user/arm-semi.c | 42 |
1 files changed, 37 insertions, 5 deletions
diff --git a/linux-user/arm-semi.c b/linux-user/arm-semi.c index 250d5b75cc..b182eb4080 100644 --- a/linux-user/arm-semi.c +++ b/linux-user/arm-semi.c @@ -77,7 +77,8 @@ static inline uint32_t set_swi_errno(TaskState *ts, uint32_t code) return code; } -#define ARG(n) tget32(args + n * 4) +#define ARG(n) tget32(args + (n) * 4) +#define SET_ARG(n, val) tput32(args + (n) * 4,val) uint32_t do_arm_semihosting(CPUState *env) { target_ulong args; @@ -158,10 +159,41 @@ uint32_t do_arm_semihosting(CPUState *env) case SYS_ERRNO: return ts->swi_errno; case SYS_GET_CMDLINE: - /* XXX: Not implemented. */ - s = (char *)g2h(ARG(0)); - *s = 0; - return -1; + /* Build a commandline from the original argv. */ + { + char **arg = ts->info->host_argv; + int len = ARG(1); + /* lock the buffer on the ARM side */ + char *cmdline_buffer = (char*)lock_user(ARG(0), len, 0); + + s = cmdline_buffer; + while (*arg && len > 2) { + int n = strlen(*arg); + + if (s != cmdline_buffer) { + *(s++) = ' '; + len--; + } + if (n >= len) + n = len - 1; + memcpy(s, *arg, n); + s += n; + len -= n; + arg++; + } + /* Null terminate the string. */ + *s = 0; + len = s - cmdline_buffer; + + /* Unlock the buffer on the ARM side. */ + unlock_user(cmdline_buffer, ARG(0), len); + + /* Adjust the commandline length argument. */ + SET_ARG(1, len); + + /* Return success if commandline fit into buffer. */ + return *arg ? -1 : 0; + } case SYS_HEAPINFO: { uint32_t *ptr; |