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authorJohannes Berg <johannes.berg@intel.com>2021-01-14 00:07:41 +0300
committerRichard Weinberger <richard@nod.at>2021-02-12 23:30:19 +0300
commite1e22d0d9183aaaf65acf0cb529cb51ddbc12e08 (patch)
treeb3951b1d0a1bb8432b9a32a03a7c2cd7a28ec71b /arch/um/os-Linux/skas
parenta15f1e41fbf59d987365018d7439f24aa5801269 (diff)
downloadlinux-e1e22d0d9183aaaf65acf0cb529cb51ddbc12e08.tar.xz
um: print register names in wait_for_stub
Since we're basically debugging the userspace (it runs in ptrace) it's useful to dump out the registers - but they're not readable, so if something goes wrong it's hard to say what. Print the names of registers in the register dump so it's easier to look at. Signed-off-by: Johannes Berg <johannes.berg@intel.com> Signed-off-by: Richard Weinberger <richard@nod.at>
Diffstat (limited to 'arch/um/os-Linux/skas')
-rw-r--r--arch/um/os-Linux/skas/process.c55
1 files changed, 53 insertions, 2 deletions
diff --git a/arch/um/os-Linux/skas/process.c b/arch/um/os-Linux/skas/process.c
index 0621d521208e..ed4bbffe8d7a 100644
--- a/arch/um/os-Linux/skas/process.c
+++ b/arch/um/os-Linux/skas/process.c
@@ -28,6 +28,54 @@ int is_skas_winch(int pid, int fd, void *data)
return pid == getpgrp();
}
+static const char *ptrace_reg_name(int idx)
+{
+#define R(n) case HOST_##n: return #n
+
+ switch (idx) {
+#ifdef __x86_64__
+ R(BX);
+ R(CX);
+ R(DI);
+ R(SI);
+ R(DX);
+ R(BP);
+ R(AX);
+ R(R8);
+ R(R9);
+ R(R10);
+ R(R11);
+ R(R12);
+ R(R13);
+ R(R14);
+ R(R15);
+ R(ORIG_AX);
+ R(CS);
+ R(SS);
+ R(EFLAGS);
+#elif defined(__i386__)
+ R(IP);
+ R(SP);
+ R(EFLAGS);
+ R(AX);
+ R(BX);
+ R(CX);
+ R(DX);
+ R(SI);
+ R(DI);
+ R(BP);
+ R(CS);
+ R(SS);
+ R(DS);
+ R(FS);
+ R(ES);
+ R(GS);
+ R(ORIG_AX);
+#endif
+ }
+ return "";
+}
+
static int ptrace_dump_regs(int pid)
{
unsigned long regs[MAX_REG_NR];
@@ -37,8 +85,11 @@ static int ptrace_dump_regs(int pid)
return -errno;
printk(UM_KERN_ERR "Stub registers -\n");
- for (i = 0; i < ARRAY_SIZE(regs); i++)
- printk(UM_KERN_ERR "\t%d - %lx\n", i, regs[i]);
+ for (i = 0; i < ARRAY_SIZE(regs); i++) {
+ const char *regname = ptrace_reg_name(i);
+
+ printk(UM_KERN_ERR "\t%s\t(%2d): %lx\n", regname, i, regs[i]);
+ }
return 0;
}