mirror/glibc
2
0
Fork 0
mirror of git://sourceware.org/git/glibc.git synced 2025-03-07 13:28:05 +08:00
Code Issues Packages Projects Releases Wiki Activity

hurd: Drop REG_GSFS and REG_ESDS from x86_64's ucontext

Browse Source 
These are useless on x86_64, and __NGREG was actually wrong with them.
This commit is contained in:
Samuel Thibault 2023-09-28 00:07:18 +02:00
parent 964d15a007
commit 29d4591b07
4 changed files with 8 additions and 16 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

4
sysdeps/mach/hurd/x86/trampoline.c
View File

@ -79,8 +79,8 @@ static void fill_ucontext (ucontext_t *uc, const struct sigcontext *sc)
/* Registers. */
#ifdef __x86_64__
memcpy (&uc->uc_mcontext.gregs[REG_GSFS], &sc->sc_gs,
(REG_ERR - REG_GSFS) * sizeof (long));
memcpy (&uc->uc_mcontext.gregs[REG_R8], &sc->sc_r8,
(REG_ERR - REG_R8) * sizeof (long));
#else
memcpy (&uc->uc_mcontext.gregs[REG_GS], &sc->sc_gs,
(REG_TRAPNO - REG_GS) * sizeof (int));

8
sysdeps/mach/hurd/x86_64/bits/sigcontext.h
View File

@ -59,13 +59,7 @@ struct sigcontext
}
trampoline.c knows this, so it must be changed if this changes. */
#define sc_i386_thread_state sc_gs /* Beginning of correspondence. */
/* Segment registers. */
int sc_gs;
int sc_fs;
int sc_es;
int sc_ds;
#define sc_i386_thread_state sc_r8 /* Beginning of correspondence. */
long sc_r8;
long sc_r9;
long sc_r10;

6
sysdeps/mach/x86/thread_state.h
View File

@ -34,12 +34,13 @@
#define PC rip
#define SP ursp
#define SYSRETURN rax
#define MACHINE_THREAD_STATE_FIX_NEW(ts) do { \
asm ("mov %%cs, %w0" : "=q" ((ts)->cs)); \
} while(0)
#else
#define PC eip
#define SP uesp
#define SYSRETURN eax
#endif
#define MACHINE_THREAD_STATE_FIX_NEW(ts) do { \
asm ("mov %%cs, %w0" : "=q" ((ts)->cs)); \
asm ("mov %%ds, %w0" : "=q" ((ts)->ds)); \
@ -47,6 +48,7 @@
asm ("mov %%fs, %w0" : "=q" ((ts)->fs)); \
asm ("mov %%gs, %w0" : "=q" ((ts)->gs)); \
} while(0)
#endif
struct machine_thread_all_state
{

6
sysdeps/x86_64/sys/ucontext.h
View File

@ -47,11 +47,7 @@ typedef greg_t gregset_t[__NGREG];
/* Number of each register in the `gregset_t' array. */
enum
{
REG_GSFS = 0, /* Actually int gs, fs. */
# define REG_GSFS REG_GSFS
REG_ESDS, /* Actually int es, ds. */
# define REG_ESDS REG_ESDS
REG_R8,
REG_R8 = 0,
# define REG_R8 REG_R8
REG_R9,
# define REG_R9 REG_R9