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linux-user/strace.c: Correct errno printing for mmap etc

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Correct the printing of errnos for syscalls which are handled
via print_syscall_ret_addr (mmap, mmap2, brk, shmat): errnos
are returned as negative returned values at this level, not
via the host 'errno' variable.

Signed-off-by: Peter Maydell <peter.maydell@linaro.org>
Signed-off-by: Riku Voipio <riku.voipio@linaro.org>
This commit is contained in:
Peter Maydell 2011-11-21 12:21:19 +00:00 committed by Riku Voipio
parent 962b289ef3
commit 2a7e12455c
1 changed files with 4 additions and 5 deletions
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9
linux-user/strace.c
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@ -1,5 +1,4 @@
#include <stdio.h> #include <stdio.h>
#include <errno.h>
#include <sys/ipc.h> #include <sys/ipc.h>
#include <sys/msg.h> #include <sys/msg.h>
#include <sys/sem.h> #include <sys/sem.h>
@ -286,11 +285,11 @@ print_syscall_ret_addr(const struct syscallname *name, abi_long ret)
{ {
char *errstr = NULL; char *errstr = NULL;
if (ret == -1) { if (ret < 0) {
errstr = target_strerror(errno); errstr = target_strerror(-ret);
} }
if ((ret == -1) && errstr) { if (errstr) {
gemu_log(" = -1 errno=%d (%s)\n", errno, errstr); gemu_log(" = -1 errno=%d (%s)\n", (int)-ret, errstr);
} else { } else {
gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret); gemu_log(" = 0x" TARGET_ABI_FMT_lx "\n", ret);
} }