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aarch64: Restore x0, x1, x2 and x3

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These registers contain the exception pointer and selector.
This commit is contained in:
C. Bergström 2014-10-24 22:40:19 -07:00 committed by Arun Sharma
parent c90a2e02b3
commit 3babc1d148
1 changed files with 28 additions and 20 deletions
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48
src/aarch64/Gresume.c
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@ -38,20 +38,24 @@ aarch64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
if (c->sigcontext_format == AARCH64_SCF_NONE) if (c->sigcontext_format == AARCH64_SCF_NONE)
{ {
/* Since there are no signals involved here we restore the non scratch /* Since there are no signals involved here we restore EH and non scratch
registers only. */ registers only. */
unsigned long regs[11]; unsigned long regs[15];
regs[0] = uc->uc_mcontext.regs[19]; regs[0] = uc->uc_mcontext.regs[0];
regs[1] = uc->uc_mcontext.regs[20]; regs[1] = uc->uc_mcontext.regs[1];
regs[2] = uc->uc_mcontext.regs[21]; regs[2] = uc->uc_mcontext.regs[2];
regs[3] = uc->uc_mcontext.regs[22]; regs[3] = uc->uc_mcontext.regs[3];
regs[4] = uc->uc_mcontext.regs[23]; regs[4] = uc->uc_mcontext.regs[19];
regs[5] = uc->uc_mcontext.regs[24]; regs[5] = uc->uc_mcontext.regs[20];
regs[6] = uc->uc_mcontext.regs[25]; regs[6] = uc->uc_mcontext.regs[21];
regs[7] = uc->uc_mcontext.regs[26]; regs[7] = uc->uc_mcontext.regs[22];
regs[8] = uc->uc_mcontext.regs[27]; regs[8] = uc->uc_mcontext.regs[23];
regs[9] = uc->uc_mcontext.regs[28]; regs[9] = uc->uc_mcontext.regs[24];
regs[10] = uc->uc_mcontext.regs[30]; /* LR */ regs[10] = uc->uc_mcontext.regs[25];
regs[11] = uc->uc_mcontext.regs[26];
regs[12] = uc->uc_mcontext.regs[27];
regs[13] = uc->uc_mcontext.regs[28];
regs[14] = uc->uc_mcontext.regs[30]; /* LR */
unsigned long sp = uc->uc_mcontext.sp; unsigned long sp = uc->uc_mcontext.sp;
struct regs_overlay { struct regs_overlay {
@ -59,13 +63,17 @@ aarch64_local_resume (unw_addr_space_t as, unw_cursor_t *cursor, void *arg)
}; };
asm volatile ( asm volatile (
"ldp x19, x20, [%0]\n" "mov x4, %0\n"
"ldp x21, x22, [%0,16]\n" "mov x5, %1\n"
"ldp x23, x24, [%0,32]\n" "ldp x0, x1, [x4]\n"
"ldp x25, x26, [%0,48]\n" "ldp x2, x3, [x4,16]\n"
"ldp x27, x28, [%0,64]\n" "ldp x19, x20, [x4,32]\n"
"ldr x30, [%0,80]\n" "ldp x21, x22, [x4,48]\n"
"mov sp, %1\n" "ldp x23, x24, [x4,64]\n"
"ldp x25, x26, [x4,80]\n"
"ldp x27, x28, [x4,96]\n"
"ldr x30, [x4,112]\n"
"mov sp, x5\n"
"ret \n" "ret \n"
: :
: "r" (regs), : "r" (regs),