diff options
Diffstat (limited to 'gdb/nat')
| -rw-r--r-- | gdb/nat/x86-linux-tdesc.c | 18 | ||||
| -rw-r--r-- | gdb/nat/x86-linux-tdesc.h | 5 |
2 files changed, 10 insertions, 13 deletions
diff --git a/gdb/nat/x86-linux-tdesc.c b/gdb/nat/x86-linux-tdesc.c index 05aa75d..c15a600 100644 --- a/gdb/nat/x86-linux-tdesc.c +++ b/gdb/nat/x86-linux-tdesc.c @@ -90,8 +90,13 @@ x86_linux_tdesc_for_tid (int tid, uint64_t *xcr0_storage, if (ptrace (PTRACE_GETREGSET, tid, (unsigned int) NT_X86_XSTATE, &iov) < 0) { + /* Can't fetch the xcr0 value so pick a simple default. This + default has x87 and sse bits set. These bits are ignored for + amd64 and x32 targets, but are checked for on i386. Without + these bits being set we generate a completely empty tdesc for + i386 which will be rejected by GDB. */ have_ptrace_getregset = TRIBOOL_FALSE; - *xcr0_storage = 0; + *xcr0_storage = X86_XSTATE_SSE_MASK; } else { @@ -112,15 +117,8 @@ x86_linux_tdesc_for_tid (int tid, uint64_t *xcr0_storage, } } - /* Check the native XCR0 only if PTRACE_GETREGSET is available. If - PTRACE_GETREGSET is not available then set xcr0_features_bits to - zero so that the "no-features" descriptions are returned by the - code below. */ - uint64_t xcr0_features_bits; - if (have_ptrace_getregset == TRIBOOL_TRUE) - xcr0_features_bits = *xcr0_storage & X86_XSTATE_ALL_MASK; - else - xcr0_features_bits = 0; + /* Use cached xcr0 value. */ + uint64_t xcr0_features_bits = *xcr0_storage & X86_XSTATE_ALL_MASK; #ifdef __x86_64__ if (is_64bit) diff --git a/gdb/nat/x86-linux-tdesc.h b/gdb/nat/x86-linux-tdesc.h index b7a4649..69df930 100644 --- a/gdb/nat/x86-linux-tdesc.h +++ b/gdb/nat/x86-linux-tdesc.h @@ -44,8 +44,7 @@ struct x86_xsave_layout; i386_linux_read_description for cases when nullptr might be returned. */ -extern const target_desc * -x86_linux_tdesc_for_tid (int tid, uint64_t *xcr0_storage, - x86_xsave_layout *xsave_layout_storage); +extern const target_desc *x86_linux_tdesc_for_tid + (int tid, uint64_t *xcr0_storage, x86_xsave_layout *xsave_layout_storage); #endif /* NAT_X86_LINUX_TDESC_H */ |