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tilegx32: fix various bugs in setcontext/getcontext/swapcontext

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This commit is contained in:
Chris Metcalf 2012-05-16 13:52:36 -04:00
parent 26624de5a2
commit 0adc5f3892
5 changed files with 26 additions and 12 deletions
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10
ChangeLog.tile
View File

@ -1,3 +1,13 @@
2012-05-16 Chris Metcalf <cmetcalf@tilera.com>
* sysdeps/unix/sysv/linux/tile/ucontext_i: Fix tilegx32 offset bug.
* sysdeps/unix/sysv/linux/tile/getcontext.S: Fix tilegx32 bug
where we accessed "uc_flags" as an 8-byte field.
* sysdeps/unix/sysv/linux/tile/setcontext.S: Likewise,
and also fix frame code not to access stack below "sp".
* sysdeps/unix/sysv/linux/tile/swapcontext.S: Fix frame code not
to access stack below "sp", and add frame unwind to error path.
2012-05-15 Chris Metcalf <cmetcalf@tilera.com>
* sysdeps/tile/sotruss-lib.c: New file.

2
sysdeps/unix/sysv/linux/tile/getcontext.S
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@ -32,7 +32,7 @@ ENTRY (__getcontext)
swapcontext() will assume those registers are all dead.
Save value "1" to uc_flags to later recognize getcontext(). */
{ movei r11, 1; ADDI_PTR r10, r0, UC_FLAGS_OFFSET }
{ ST r10, r11; addli r10, r0, UC_REG(30) }
{ ST_PTR r10, r11; addli r10, r0, UC_REG(30) }
{ ST r10, r30; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r31; ADDI_PTR r10, r10, REGSIZE }
{ ST r10, r32; ADDI_PTR r10, r10, REGSIZE }

12
sysdeps/unix/sysv/linux/tile/setcontext.S
View File

@ -37,7 +37,7 @@ ENTRY (__setcontext)
#if UC_FLAGS_OFFSET != 0
# error "Add offset to r0 prior to load."
#endif
LD r10, r0
LD_PTR r10, r0
{
BEQZ r10, .Lsigreturn
addi r10, r10, -1 /* Confirm that it has value "1". */
@ -51,13 +51,13 @@ ENTRY (__setcontext)
ADDI_PTR r11, sp, -(2 * REGSIZE)
move r10, sp
}
ADDI_PTR sp, sp, -(3 * REGSIZE)
cfi_def_cfa_offset (3 * REGSIZE)
cfi_offset (lr, 0)
{
ST r11, r10
ADDI_PTR r10, sp, -REGSIZE
ADDI_PTR sp, sp, -(3 * REGSIZE)
ADDI_PTR r10, sp, (2 * REGSIZE)
}
cfi_def_cfa_offset (3 * REGSIZE)
{
ST r10, r0
ADDLI_PTR r1, r0, UC_SIGMASK_OFFSET
@ -72,13 +72,13 @@ ENTRY (__setcontext)
moveli TREG_SYSCALL_NR_NAME, __NR_rt_sigprocmask
}
swint1
ADDI_PTR r11, sp, 2 * REGSIZE /* Restore uc_context to r11. */
{
LD r11, r11
ADDI_PTR sp, sp, 3 * REGSIZE
ADDI_PTR r11, sp, 2 * REGSIZE /* Restore uc_context to r11. */
}
cfi_def_cfa_offset (0)
LD lr, sp
LD r11, r11
{
ADDI_PTR r10, r11, UC_REG(0)
BNEZ r1, .Lsyscall_error

11
sysdeps/unix/sysv/linux/tile/swapcontext.S
View File

@ -31,17 +31,17 @@ ENTRY (__swapcontext)
ADDI_PTR r11, sp, -(3 * REGSIZE)
move r10, sp
}
ADDI_PTR sp, sp, -(4 * REGSIZE)
cfi_def_cfa_offset (4 * REGSIZE)
cfi_offset (lr, 0)
{
ST r11, r10
ADDI_PTR r10, sp, -(2 * REGSIZE)
ADDI_PTR r10, sp, (2 * REGSIZE)
}
{
ST r10, r0
ADDI_PTR r10, sp, -REGSIZE
ADDI_PTR sp, sp, -(4 * REGSIZE)
ADDI_PTR r10, sp, (3 * REGSIZE)
}
cfi_def_cfa_offset (4 * REGSIZE)
ST r10, r1
/* Save the current context. */
@ -80,6 +80,9 @@ ENTRY (__swapcontext)
}
.Lerror:
ADDI_PTR sp, sp, 4 * REGSIZE
cfi_def_cfa_offset (0)
LD lr, sp
jrp lr
END (__swapcontext)

3
sysdeps/unix/sysv/linux/tile/ucontext_i.h
View File

@ -25,7 +25,8 @@
#define UC_STACK_SP_OFFSET (UC_LINK_OFFSET + __SIZEOF_POINTER__)
#define UC_STACK_FLAGS_OFFSET (UC_STACK_SP_OFFSET + __SIZEOF_POINTER__)
#define UC_STACK_SIZE_OFFSET (UC_STACK_FLAGS_OFFSET + __SIZEOF_POINTER__)
#define UC_STACK_MCONTEXT_OFFSET (UC_STACK_SIZE_OFFSET + __SIZEOF_POINTER__)
#define UC_STACK_MCONTEXT_OFFSET \
((UC_STACK_SIZE_OFFSET + __SIZEOF_POINTER__ + REGSIZE - 1) & -REGSIZE)
#define UC_REG(i) (UC_STACK_MCONTEXT_OFFSET + ((i) * REGSIZE))
#define UC_NREGS 64
#define UC_SIGMASK_OFFSET UC_REG(UC_NREGS)