[PATCH v2] Add support for NetBSD threads in amd64-bsd-nat.c
Kamil Rytarowski
n54@gmx.com
Tue Mar 17 23:03:43 GMT 2020
NetBSD ptrace(2) accepts thread id (LWP) as the 4th argument for threads.
Define gdb_ptrace() a wrapper function for ptrace(2) that properly passes
the pid,lwp pair on NetBSD and the result of get_ptrace_pid() for others.
gdb/ChangeLog:
* amd64-bsd-nat.c (gdb_ptrace): New.
* amd64-bsd-nat.c (amd64bsd_fetch_inferior_registers)
(amd64bsd_store_inferior_registers) Switch from pid_t to ptid_t.
* amd64-bsd-nat.c (amd64bsd_fetch_inferior_registers)
(amd64bsd_store_inferior_registers) Use gdb_ptrace.
---
gdb/ChangeLog | 8 ++++++++
gdb/amd64-bsd-nat.c | 45 ++++++++++++++++++++++++++++++---------------
2 files changed, 38 insertions(+), 15 deletions(-)
diff --git a/gdb/ChangeLog b/gdb/ChangeLog
index abf3346edb3..b42d9742bde 100644
--- a/gdb/ChangeLog
+++ b/gdb/ChangeLog
@@ -1,3 +1,11 @@
+2020-03-17 Kamil Rytarowski <n54@gmx.com>
+
+ * amd64-bsd-nat.c (gdb_ptrace): New.
+ * amd64-bsd-nat.c (amd64bsd_fetch_inferior_registers)
+ (amd64bsd_store_inferior_registers) Switch from pid_t to ptid_t.
+ * amd64-bsd-nat.c (amd64bsd_fetch_inferior_registers)
+ (amd64bsd_store_inferior_registers) Use gdb_ptrace.
+
2020-03-17 Kamil Rytarowski <n54@gmx.com>
* sparc-nat.c (gdb_ptrace): New.
diff --git a/gdb/amd64-bsd-nat.c b/gdb/amd64-bsd-nat.c
index 9a3c9c22c05..c2736daa241 100644
--- a/gdb/amd64-bsd-nat.c
+++ b/gdb/amd64-bsd-nat.c
@@ -36,6 +36,21 @@
#include "amd64-bsd-nat.h"
+static int
+gdb_ptrace (PTRACE_TYPE_ARG1 request, ptid_t ptid, PTRACE_TYPE_ARG3 addr,
+ PTRACE_TYPE_ARG4 data)
+{
+#ifdef __NetBSD__
+ gdb_assert (data == 0);
+ /* Support for NetBSD threads: unlike other ptrace implementations in this
+ file, NetBSD requires that we pass both the pid and lwp. */
+ return ptrace (request, ptid.pid (), addr, ptid.lwp ());
+#else
+ pid_t pid = get_ptrace_pid (ptid);
+ return ptrace (request, pid, addr, data);
+#endif
+}
+
/* Fetch register REGNUM from the inferior. If REGNUM is -1, do this
for all registers (including the floating-point registers). */
@@ -43,7 +58,7 @@ void
amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
{
struct gdbarch *gdbarch = regcache->arch ();
- pid_t pid = get_ptrace_pid (regcache->ptid ());
+ ptid_t ptid = regcache->ptid ();
#if defined(PT_GETFSBASE) || defined(PT_GETGSBASE)
const struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
#endif
@@ -52,7 +67,7 @@ amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
{
struct reg regs;
- if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
+ if (gdb_ptrace (PT_GETREGS, ptid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
amd64_supply_native_gregset (regcache, ®s, -1);
@@ -65,7 +80,7 @@ amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
{
register_t base;
- if (ptrace (PT_GETFSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
+ if (gdb_ptrace (PT_GETFSBASE, ptid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
perror_with_name (_("Couldn't get segment register fs_base"));
regcache->raw_supply (tdep->fsbase_regnum, &base);
@@ -78,7 +93,7 @@ amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
{
register_t base;
- if (ptrace (PT_GETGSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
+ if (gdb_ptrace (PT_GETGSBASE, ptid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
perror_with_name (_("Couldn't get segment register gs_base"));
regcache->raw_supply (tdep->fsbase_regnum + 1, &base);
@@ -96,7 +111,7 @@ amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
if (x86bsd_xsave_len != 0)
{
xstateregs = alloca (x86bsd_xsave_len);
- if (ptrace (PT_GETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs, 0)
+ if (gdb_ptrace (PT_GETXSTATE, ptid, (PTRACE_TYPE_ARG3) xstateregs, 0)
== -1)
perror_with_name (_("Couldn't get extended state status"));
@@ -105,7 +120,7 @@ amd64bsd_fetch_inferior_registers (struct regcache *regcache, int regnum)
}
#endif
- if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ if (gdb_ptrace (PT_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
amd64_supply_fxsave (regcache, -1, &fpregs);
@@ -119,7 +134,7 @@ void
amd64bsd_store_inferior_registers (struct regcache *regcache, int regnum)
{
struct gdbarch *gdbarch = regcache->arch ();
- pid_t pid = get_ptrace_pid (regcache->ptid ());
+ ptid_t ptid = regcache->ptid ();
#if defined(PT_SETFSBASE) || defined(PT_SETGSBASE)
const struct gdbarch_tdep *tdep = gdbarch_tdep (gdbarch);
#endif
@@ -128,12 +143,12 @@ amd64bsd_store_inferior_registers (struct regcache *regcache, int regnum)
{
struct reg regs;
- if (ptrace (PT_GETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
+ if (gdb_ptrace (PT_GETREGS, ptid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't get registers"));
amd64_collect_native_gregset (regcache, ®s, regnum);
- if (ptrace (PT_SETREGS, pid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
+ if (gdb_ptrace (PT_SETREGS, ptid, (PTRACE_TYPE_ARG3) ®s, 0) == -1)
perror_with_name (_("Couldn't write registers"));
if (regnum != -1)
@@ -149,7 +164,7 @@ amd64bsd_store_inferior_registers (struct regcache *regcache, int regnum)
base = 0;
regcache->raw_collect (tdep->fsbase_regnum, &base);
- if (ptrace (PT_SETFSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
+ if (gdb_ptrace (PT_SETFSBASE, ptid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
perror_with_name (_("Couldn't write segment register fs_base"));
if (regnum != -1)
return;
@@ -164,7 +179,7 @@ amd64bsd_store_inferior_registers (struct regcache *regcache, int regnum)
base = 0;
regcache->raw_collect (tdep->fsbase_regnum + 1, &base);
- if (ptrace (PT_SETGSBASE, pid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
+ if (gdb_ptrace (PT_SETGSBASE, ptid, (PTRACE_TYPE_ARG3) &base, 0) == -1)
perror_with_name (_("Couldn't write segment register gs_base"));
if (regnum != -1)
return;
@@ -180,25 +195,25 @@ amd64bsd_store_inferior_registers (struct regcache *regcache, int regnum)
if (x86bsd_xsave_len != 0)
{
xstateregs = alloca (x86bsd_xsave_len);
- if (ptrace (PT_GETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs, 0)
+ if (gdb_ptrace (PT_GETXSTATE, ptid, (PTRACE_TYPE_ARG3) xstateregs, 0)
== -1)
perror_with_name (_("Couldn't get extended state status"));
amd64_collect_xsave (regcache, regnum, xstateregs, 0);
- if (ptrace (PT_SETXSTATE, pid, (PTRACE_TYPE_ARG3) xstateregs,
+ if (gdb_ptrace (PT_SETXSTATE, ptid, (PTRACE_TYPE_ARG3) xstateregs,
x86bsd_xsave_len) == -1)
perror_with_name (_("Couldn't write extended state status"));
return;
}
#endif
- if (ptrace (PT_GETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ if (gdb_ptrace (PT_GETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't get floating point status"));
amd64_collect_fxsave (regcache, regnum, &fpregs);
- if (ptrace (PT_SETFPREGS, pid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
+ if (gdb_ptrace (PT_SETFPREGS, ptid, (PTRACE_TYPE_ARG3) &fpregs, 0) == -1)
perror_with_name (_("Couldn't write floating point status"));
}
}
--
2.25.0
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