mirrors/linux
1
0
Fork 0
mirror of https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git synced 2026-02-17 23:00:26 -05:00
Code Issues Packages Projects Releases Wiki Activity

kselftest/arm64: Log error codes in sve-ptrace

Browse Source 
Use ksft_perror() to report error codes from failing ptrace operations to
make it easier to interpret logs when things go wrong.

Signed-off-by: Mark Brown <broonie@kernel.org>
Signed-off-by: Will Deacon <will@kernel.org>
This commit is contained in:
Mark Brown
2025-08-12 15:37:00 +01:00
committed by Will Deacon
parent a679e5683d
commit 791d703bad
1 changed files with 20 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

24
tools/testing/selftests/arm64/fp/sve-ptrace.c
View File

@@ -95,19 +95,27 @@ static int do_child(void)
static int get_fpsimd(pid_t pid, struct user_fpsimd_state *fpsimd)
{
struct iovec iov;
int ret;
iov.iov_base = fpsimd;
iov.iov_len = sizeof(*fpsimd);
return ptrace(PTRACE_GETREGSET, pid, NT_PRFPREG, &iov);
ret = ptrace(PTRACE_GETREGSET, pid, NT_PRFPREG, &iov);
if (ret == -1)
ksft_perror("ptrace(PTRACE_GETREGSET)");
return ret;
}
static int set_fpsimd(pid_t pid, struct user_fpsimd_state *fpsimd)
{
struct iovec iov;
int ret;
iov.iov_base = fpsimd;
iov.iov_len = sizeof(*fpsimd);
return ptrace(PTRACE_SETREGSET, pid, NT_PRFPREG, &iov);
ret = ptrace(PTRACE_SETREGSET, pid, NT_PRFPREG, &iov);
if (ret == -1)
ksft_perror("ptrace(PTRACE_SETREGSET)");
return ret;
}
static struct user_sve_header *get_sve(pid_t pid, const struct vec_type *type,
@@ -117,6 +125,7 @@ static struct user_sve_header *get_sve(pid_t pid, const struct vec_type *type,
void *p;
size_t sz = sizeof *sve;
struct iovec iov;
int ret;
while (1) {
if (*size < sz) {
@@ -132,8 +141,11 @@ static struct user_sve_header *get_sve(pid_t pid, const struct vec_type *type,
iov.iov_base = *buf;
iov.iov_len = sz;
if (ptrace(PTRACE_GETREGSET, pid, type->regset, &iov))
ret = ptrace(PTRACE_GETREGSET, pid, type->regset, &iov);
if (ret) {
ksft_perror("ptrace(PTRACE_GETREGSET)");
goto error;
}
sve = *buf;
if (sve->size <= sz)
@@ -152,10 +164,14 @@ static int set_sve(pid_t pid, const struct vec_type *type,
const struct user_sve_header *sve)
{
struct iovec iov;
int ret;
iov.iov_base = (void *)sve;
iov.iov_len = sve->size;
return ptrace(PTRACE_SETREGSET, pid, type->regset, &iov);
ret = ptrace(PTRACE_SETREGSET, pid, type->regset, &iov);
if (ret == -1)
ksft_perror("ptrace(PTRACE_SETREGSET)");
return ret;
}
/* Validate setting and getting the inherit flag */